Prof.
Shin-ichi Ohkoshi
(Department of Chemistry, School of Science, The University of Tokyo)
06/07/2015, 16:10
oral presentation
Development of functional materials has been extensively studied in the field of solid-state chemistry. Up to date, we have developed various unique photomagnetic mateirals using cyano-bridged bimetallic assemblies [1‒4]. Furthermore, we have reported a new crystal structure of titanium oxide, lambda-titanium oxide (λ-Ti3O5), which exhibits a photo-reversible metallic (Pauli paramagnetic)...
Prof.
Eugenio Coronado
(ICMol. Univ. Valencia)
07/07/2015, 09:00
Responsive materials for which physical or chemical properties can be tuned by applying an external stimulus are attracting considerable interest in materials science. This kind of materials may be viewed as a new generation of multifunctional materials in which two (or more) functional properties are not simply co-existing in the same material but strongly coupled to guarantee its response to...
Prof.
Hiroko Tokoro
(Division of Materials Science, Faculty of Pure and Applied Sciences)
07/07/2015, 09:40
In recent years, cyano-bridged metal assemblies have been aggressively studied to demonstrate various magnetic functionalities.(1,2) Among them, rubidium manganese hexacyanoferrate is an attractive material since it shows a various functionalities, e.g., thermal-induced phase transition, electronic-field induced phase transition, ferroelectric ferromagnetism, second harmonic generation,...
Dr
Robert Podgajny
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 10:10
The low dimensional cyanido-bridged species gained an extremely strong interest due to the diversity of structural coordination forms and numerous properties, prospective for future applications in data storage and processing. This could be accessible through the controlled manipulation on structural, electronic and magnetic state of the related soft materials. Several important underlying...
Dr
Dawid Pinkowicz
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 10:40
One of the huge advantages of molecule-based magnets over the conventional magnetic solids is their “structural plasticity” – the ability to undergo structural and magnetic changes/transitions on slight modifications by using appropriate stimuli: temperature, pressure, guest molecules, electromagnetic radiation and so on.
In case of cyanide-based magnetic solids the removal/uptake of guest...
Prof.
Christian Näther
(University of Kiel, Germany)
07/07/2015, 11:30
Recently, investigations on the synthesis of new magnetic materials like, e.g., single chain magnets (SCMs) has become of increasing interest. This behaviour was already predicted by Glauber in 1963 but experimentally proven for the first time by Caneschi et al. in 2001. Such compounds show a slow relaxation of the magnetization below the so-called blocking temperature and therefore, are able...
Dr
Beata Nowicka
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 12:00
Materials that respond to external stimuli in form of temperature, pressure, light or presence of guest molecules by changes in magnetic, optical or electrical properties can act as molecular switches and sensors. Molecular assemblies composed of metal ions and bridging ligands, which show sensitivity to external stimuli are often characterised by the flexibility of their coordination...
M. Rams
(Institute of Physics, Jagiellonian University, Kraków)
07/07/2015, 12:20
Single chain magnet (SCM) behavior may be observed in crystals in which the exchange interaction between spins creates a quasi one dimensional system. Despite the lack of a long-range magnetic order at a finite temperature, SCMs may exhibit below a blocking temperature the remanent magnetization due to slow magnetic relaxation. The relaxation time of ferromagnetically coupled chain of Ising...
Prof.
Phuc Nguyen Xuan
(Institute of Materials Science, VAST, Hanoi)
07/07/2015, 12:40
Magnetic nanoparticles (MNPs) have recently attracted much attention for both basic research and application interests. The superparamagnetic behavior of MNP when particle diameter becomes smaller than a few tens nanometers was known yet more than 60 years ago and is a prime property concern in almost all the reports on MNPs today. In applications, the particles need to be functionalized to...
Prof.
Alexander Belushkin
(Frank Lab. Neutron Physics, JINR)
07/07/2015, 13:10
The talk will give an overview of some recent results obtained in the field of nanostructure characterization using neutron scattering methods. Brief descriptions of full reflectometry (specular, off-specular and grazing incidence small-angle neutron scattering) method are discussed. Applications of these methods for solving different problems of molecular systems on a surface will be...
Dr
Arndt Remhof
(EMPA, Dep. Materials for Energy Conversion, Switzerland)
07/07/2015, 15:00
multifunctional materials
The conversion and storage of energy is becoming increasingly important. Finite reserves of fossil energy carriers and growing environmental concerns are leading to an increased use of so-called renewable energy sources such as solar or wind energy. A future society therefore requires materials to convert energy fluxes to energy carriers for the convenient storage and transport of energy....
Prof.
Zbigniew Łodziana
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 15:30
Metal borohydride complexes and their derivatives are of great interest due to their potential as hydrogen storage materials. Thermodynamic and kinetic properties of these materials can be tuned using: mixed-metal borohydride complexes; ammonia-containing metal borohydrides; confinement of these materials in small nanopores. Any of such procedures leads to materials with complex crystalline...
Dr
Mirosław Gałązka
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 15:50
We present a new scaling relationship accounting for relaxation processes of both real and imaginary parts of the complex dielectric permittivity data in wide temperature range of various dielectric substances (liquid crystals, neoalcohols, liquid glass-formers). It has been successfully used for experimental data related to various dynamics in liquid (IL, N, Ch, SmA) and solid (SmB, Cr, ODIC)...
Dr
Robert Gębarowski
(Institute of Physics, Cracow University of Technology)
07/07/2015, 16:10
The Ising model offers an excellent testing ground for examining classical and quantum phase transitions. Although the Ising model has been studied extensively for a long time (see e.g. [1]), its analytical solutions are known only for some cases. Applications of the Ising model are reaching far beyond molecular level of physical complexity, scaling and universality of critical phenomena. For...
Dr
Jan Krawczyk
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 17:00
The phase situation and molecular motions of some cyanobiphenyl compounds with different terminal chains were studied in our group using various experimental methods [1-4]. Rich phase polymorphism was found for chiral isomers.
The main topic of this lecture will be two of the liquid crystal glass-formers of this group: (S)-4-(2-methylbutyl)-4'-cyanobiphenyl (5*CB) and...
Ms
Daria Szewczyk
(Institute of Low Temperature and Structure Research PAS)
07/07/2015, 17:20
The measurements of heat capacity and thermal conductivity of the glass-like monoclinic and the stable orthorhombic phases of 2-adamantanone (C10H14O) have been carried out in temperature range 2 K - 300 K. The results of heat capacity determination for the both investigated phases are almost the same, whereas for thermal conductivity measurements substantial differences have been found. The...
Dr
Natalia Osiecka
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 17:35
4-hexyloxybenzylidene-4’-dodecyloxyaniline (6BA12) belongs to the 4-hexyloxybenzylidene-4’-alkyloxyanilines homologous series. All derivatives of 6BAn (n=1-12) homologous series exhibit liquid crystal phases. Arrangement of molecules in phase and number of phases increase with the length of alkyloxy tail [1]. During cooling this substance several liquid crystal phases are observed: nematic...
Mr
Wojciech Tomczyk
(Institute of Physics, Jagiellonian University, Kraków)
07/07/2015, 17:50
The discovery of ferroelectric liquid crystals in 1974 by Meyer et al. [1] and later antiferroelectric by Chandani et al. [2] resulted in conducting many researches over these materials due to their promising applications [3]. The aim of this work was to study the molecular dynamics of two homologous thermotropic liquid crystal compounds, in short 6F4BBiOC8 [4] and 8F2BBiOC8....
Mr
Jakub Saramak
(Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Poland)
07/07/2015, 18:05
Polymers, which exhibit lower critical solution temperature (LCST) are a good substrates to design stimuli-responsive materials with many applications such as micro-valves, chemical indicators, drug delivery systems, lenses and many others [1,2]. In such systems three fundamental types of water may be distinguished: “bulk”, primary and secondary bounded water [3]. Knowledge about diffusion of...
Dr
Malgorzata Jasiurkowska-Delaporte
(NanoBioMedical Center, Adam Mickiewicz University, Poznań, Poland)
07/07/2015, 18:30
soft matter and glassformers
Dielectric properties and morphology of nanocomposites based on poly(2-vinylpyridine-co-styrene) (P2V-S) as a matrix and multiwall carbon nanoubes (MWCNTs) as nanofillers are investigated. Nanotube-polymer interactions are evaluated by Raman and Fourier Transform Infrared Spectroscopy (FTIR). The molecular dynamics is investigated in the wide frequency (10-2-10-6 Hz) and temperature range by...
Ms
Dominika Kuźma
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 18:30
Surfaces and interfaces are waveguides for some kinds of waves. The Stoneley wave occurs on the interface of perfectly bonded isotropic elastic materials [1]. The kind of waves are of importance e.g in geoscience [2] and in the design of delay lines in acoustical waveguides [3]. Whereas the surface Rayleigh wave exists on all free surfaces of elastic media, the range of existence of the...
Dr
Łukasz Kolek
(Department of Materials Sciences, Rzeszów University of Technology, Poland)
07/07/2015, 18:30
For 1-[3-fluoro-4-(1-methylheptyloxycarbonyl)phenyl]-2-[4’-2,2,3,3,4,4,4-heptafluoro butoxybutoxy)biphenyl -4-yl]ethane (1F7) built of chiral molecules, intra- and intermolecular dynamics is presented. Intermolecular dynamics was studied by dielectric spectroscopy while intramolecular dynamics by nuclear magnetic resonance and infrared spectroscopy. In ferroelectric SmC*, antiferroelectric...
Marta Podruczna
(Faculty of Chemistry, University of Wroclaw)
07/07/2015, 18:30
Contemporary LCD industry is still looking for new materials with very specific physical properties. The azobenzene moiety is very comfortable fragment in designing and synthesis of new structures, giving stable mesophase often with very interesting polymorphism. Additional useful property of azobenzenes for modern optics is their photosensitivity, which allows to design materials...
Mr
Marcin Majka
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 18:30
Any acoustic signal extinguishes progressively due to multiple reflections from the walls and different objects in the room. The effect is called reverberation. The reverberation time may affect significantly the intelligibility of speech and music [1]. Numerical and electronic sound synthesis allows one to model the reverberation by the convolution of the signal with the appropriate impulse...
Ms
Izabela Niezgoda
(Faculty of Chemistry, University of Wroclaw, Poland)
07/07/2015, 18:30
Liquid crystals containing azo moiety are extensively studied group of compounds. Main reason of this situation are their interesting physicochemical as well as optical properties. An important role in the azobenzene derivatives studies plays the photosensitivity [1], through which the trans-cis-trans isomerization of -N=N- group is possible. Highly developed optoelectronic industry is looking...
Ms
Liya Khadeeva
(Insitute of Physics of Rennes, University of Rennes 1)
07/07/2015, 18:30
multifunctional materials
By means of visible absorption spectroscopy and X-Ray diffraction the photo-switching between the ground state nitrosyl (GS), isonitrosyl (SI) and side-on (SII) configurations under continuous light irradiation is studied in the [Ru(py)4Cl(NO)](PF6)2∙1/2H2O system [1]. It is a remarkable model compound in the family of systems containing...
Dr
Claudia Forte
(ICCOM-CNR, Pisa)
07/07/2015, 18:30
Polymer nano-composites represent a class of materials of great interest for many practical applications. In particular, polyvinyl butyral (PVB) is used in automotive and architectural applications for laminated safety glasses thanks to its high binding efficiency, optical clarity, and good adhesion to several different surfaces. Furthermore, its use as a polymer matrix in nanocomposite...
Dr
Ewa Juszyńska-Gałązka
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 18:30
4-n-heptyl-2’,3’-difluoro-4’-undecyloxybiphenyl (4HFDB) and 4-n-heptyl-2’,3’-difluoro-4’-nonyloxybiphenyl (4HFNB) are liquid crystalline compounds of chemical formula C7H15-C6H4-C6H2F2-O-C11H23 and...
Dr
Ewa Juszyńska-Gałązka
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 18:30
3,3-dimethylbutan-2-ol, 2,3-dimethylbutan-2-ol, are two of seventeen isomers of hexanol of the same chemical formula C6H13OH differing in physical properties. These are interesting representatives of a class of soft matter functional materials being isomeric varieties. The structure of hexanol globular molecule, strongly influencing their intermolecular interactions,...
Mr
Paweł Sobieszczyk
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 18:30
When encountering a mismatch of characteristic impedance a bulk acoustic wave transforms into up to three reflected and refracted waves of different polarizations. The effect is known as mode conversion [1]. The lack of the specularly reflected wave is called total mode conversion because then all the outgoing waves propagate at speeds different than that of the incident one. Conversely, if...
Aleksandra Deptuch
(Institute of Physics, Jagiellonian University, Kraków)
07/07/2015, 18:30
Compounds from the homologous series of 4-n-pentylphenyl-4’-n-alkiloxybenzoates CnH2n+1-O-C6H6-COS-C6H6-C5H11, denoted as nOS5, known of creating liquid crystalline phases, are the subject of our recent studies. Some results for crystalline and liquid crystalline phases of...
Ms
Anna Hoczek
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
Ligands decide about crystal structure of the coordination materials and in many cases could be a key factor in achieving, tuning and controlling the target properties. Several important features of their molecular structure and electronic structure can be preprogrammed at the very first stage of synthetic procedure. This can be done by the selection of (i) type, number, and spatial...
Mr
Mateusz Reczyński
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
The [NiII(cyclam)]2+ complex (cyclam = 1,4,8,11-tetraazacyclotetradecane) has been widely employed as a building block in the construction of bimetallic assemblies and afforded several structurally dynamic guest-sensitive CN-bridged molecular magnets [1,2]. This complex can be easily oxidised to the relatively stable [NiIII(cyclam)]3+ unit (s = ½)...
Mr
Mirosław Arczyński
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
Since their discovery Prussian Blue Analogs (PBAs) have become a driving force for many fruitful discoveries on the route to control the quantum nanoworld [1]. For example study of CoII-FeIII(CN)6 PBAs resulted in the burst of interest because of its nonmagnetic to magnetic photo-induced transition. Along with the miniaturization tendencies and in connection...
Ms
Gabriela Handzlik
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
In our contribution we describe syntheses, single-crystal X-ray crystallographic structures and magnetic properties of a new family of cyanide-bridged coordination polymers {(NH4)[(H2O)MnII-(μ-L)-MnII(H2O)] [NbIV(CN)8].xH2O}n MnNbL with supporting ligands L = cyanide, formate, acetate and...
Mr
Michał Magott
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
We have synthesized two new coordination chain compounds consisting of manganese(II), 2,2'-bipyridyl and octacyanoniobate(IV), both of them exhibiting ferromagnetic ordering. The first one [MnII(bpy)(H2O)2]2[Nb(CN)8]•5H2O 1 is isostructural with the manganese-octacyanotungstate vertex-sharing squares chain already...
Mr
Ryo Yoshimoto
(Department of Chemistry, Graduate School of Science, Osaka University)
07/07/2015, 20:30
In this work, we measured heat capacities of bi-layer Mott insulators X[Ni(dmit)2]2 (X = Et-4BrT, Et-2I-5BrP, Et-2,5-DBrP) under magnetic fields in order to clarify the low temperature magnetic properties. X[Ni(dmit)2]2 forms low dimensional electronic structure based on the segregated stacking of Ni(dmit)2 molecules and their counter...
Prof.
Maria Bałanda
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 20:30
One of the possible applications of magnetic molecular clusters is using them for magnetic refrigeration in the low and ultra-low temperature range. Due to the high spin values S shown by some molecules, the total molar magnetic entropy Smax=Rln(2S+1) (R is a gas constant) is large and the isothermal entropy change ∆S on the change of...
Mr
Marcin Gajewski
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 20:30
poster presentation
One of the strategies to obtain new magnetic materials displaying substantial magnetocaloric effect is to tailor molecular magnetic materials with high spin ground state. Following this course of research a new family of coordination compounds based on Ni(II) and W(V) ions with a general formula Ni[Ni(L)(solv)]8[W(CN)8]6, where L=2,2’-bipyridine (1),...
Dr
Robert PEŁKA
(Institute of Nuclear Physics PAN, Kraków)
07/07/2015, 20:30
Magnetocaloric effect for {[Mn(II)(pyrazole)4]2[Nb(IV)(CN)8]∙4H2O}n1), {Mn(II)2(imH)2(H2O)4[Nb(IV)(CN)8] ∙4H2O}n (2) and [Nb(IV){(μ-CN)4Mn(II)(H2O)2}2∙4H2O]n (3) is reported....
Dr
Lukasz Laskowski
(Czestochowa University of Technology, Poland)
07/07/2015, 20:30
The paper considers mesoporous silica SBA-15 containing propyl-iron phosphate groups. This compound has been studied to examine efficiency of the synthesis route. Mössbauer spectroscopy has shown that iron has been successfully connected to propyl-phosphate groups incorporated in the silica matrix. Nevertheless Energy Disspersive X-Ray analysis (EDX) has indicated that amount of the iron ions...
Mr
Michał Heczko
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
The combination of [Ni(cyclam)]2+ (cyclam = 1,4,8,11-tetraazacyclotetradecane) with [Nb(CN)8]4- has been described earlier [1]. The compound exhibits 3D diamond-like network topology and long range magnetic ordering, whose characteristics depend on the amount of crystallisation water. The experiments has shown that after dehydration the original phase cannot be...
Dr
Tomasz Korzeniak
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
The molecular systems based on [MV(CN)8]3–/4– (M=Mo, W) have attracted great attention over last years, mainly due to the formation of many interesting magnetic systems [1]. The charge-transfer phenomena in cyanido-bridged molecular systems allows for the control of magnetic bistability, leading to potential functional materials. The diamagnetic...
Prof.
Zbigniew Tomkowicz
(Institute of Physics, Jagiellonian University, Kraków)
07/07/2015, 20:30
In the crystal structure of [Co(NCS)2(4-(4-chlorobenzyl) pyridine)2]n (abbr. ClBP) the Co(II) cations are octahedrally coordinated by two terminal ClBP ligands and four thiocyanato anions and are linked into ferromagnetic chains by pairs of µ-1,3-bridging thiocyanato anions. Due to small antiferromagnetic interchain interactions the compound is antiferromagnet...
Dr
Sujit Sasmal
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
In molecular magnetism, the use of [M(CN)8]n– (M= Mo, W; n=3, 4) ions as building block for the generation of cyanido bridged coordination polymers is growing rapidly due to their potential functionalities [1]. In the paramagnetic [M(CN)8]n– (M= Mo, W; n=3] ions the metal centre provides more diffuse single occupied orbital which causes stronger...
Mr
Shusaku Imajo
(Department of Chemistry, Graduate School of Science, Osaka University)
07/07/2015, 20:30
molecular magnets and nanomagnets
Unconventional superconductivity has been a challenging subject to study in condensed matter science. The pairing of electrons in conventional superconductors can be explained by a weak attractive force by means of the electron-phonon coupling known as the BCS mechanism. However the mechanisms of many unconventional superconductors are still open questions. In this study, we investigated an...
Ms
Yuki Kawata
(Department of Chemistry, University of Tsukuba ; Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST))
07/07/2015, 20:30
soft matter and glassformers
A liquid-crystalline physical gel formed by the fibrous aggregation of gelators in liquid crystals (LCs) have been recognized as a new class of soft materials and extensively investigated.1 A particle/LC composite gel is a kind of liquid-crystalline physical gels in which particles act as the gelator. Recently, we have reported the viscoelastic properties and photoinduced gel–sol...
Mr
Wojciech Nogaś
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
Pentadecanuclear {MII9[M’V(CN)8]6Lx(solv)y} (M - paramagnetic 3d cation, M’ – paramagnetic Mo, W centers, L – chelating and bridging ligands) high-spin clusters are of scientific interest because of magnetic properties, notably slow magnetic relaxation and single molecule magnet behavior, magnetocaloric effect, and...
Mr
Bernard Czarnecki
(Faculty of Chemistry, Jagiellonian University, Kraków)
07/07/2015, 20:30
Over the recent years an intensive research provided examples of synthesis of heterometalic molecular materials with paramagnetic [M(CN)8]n− (M = NbIV, MoIV,V, WIV,V) ions, 3d metal ions and organic ligands. Such assemblies [1,2] proves the great potential for applications of cyano-bridged coordination networks and in the future this...
Prof.
Herve Cailleau
(Institute of Physics, University Rennes 1, France)
08/07/2015, 09:00
There is a remarkable development in the field of ultra-fast time-resolved measurements in solids, in which a pump laser pulse is used to prepare the system into highly excited state, while the real-time induced electronic and/or structural dynamics is tracked with subsequent probe pulses. This adds a temporal dimension on top of energy and momentum. Nowadays, laser sources are able to deliver...
Dr
Maciej Lorenc
(CNRS-University Rennes 1)
08/07/2015, 09:40
The general excitement born out of the ultrafast clock caused rush of new ideas, new materials, and new instruments. One feat in particular has been draining a lot of effort, namely the control of materials with an ultrashort laser pulse. There is ample evidence now that materials can be directed between different macroscopic states by using appropriate electronic, or structural, excitations....
Prof.
Martin Müller
(Helmholtz-Zentrum Geesthacht)
08/07/2015, 10:10
The biological structural material silkworm silk combines high extensibility with high mechanical strength. The key to silk's unique mechanical properties lies in the microstructure of this protein fibre with nanocrystals embedded in a softer, disordered matrix. On the basis of results of novel in situ experiments using the techniques of mechanical relaxation [1], neutron spectroscopy [1],...
Ms
Liya Khadeeva
(Institute of Physics of Rennes, University of Rennes 1), Prof.
Marylise Buron-Le Cointe
(Institute of Physics of Rennes, University of Rennes 1)
08/07/2015, 10:40
By means of visible absorption spectroscopy and X-Ray diffraction the photo-switching between the ground state nitrosyl (GS), isonitrosyl (SI) and side-on (SII) configurations under continuous light irradiation is studied in the [Ru(py)4Cl(NO)](PF6)2.1/2H2O system[1]. It is a remarkable model compound in the family of systems containing...
Dr
Bridget Murphy
(Kiel University)
08/07/2015, 11:30
Magnetoelectric composite materials are promising candidates for highly sensitive magnetic-field sensors. Exploiting a range of X-ray diffraction methods [1-3], we have succeeded to directly determine magnetic and electric field induced strain at the interface of these magnetoelectric composites. We show that both geometry and sample growth play an important role in strain behaviour.
High...
Prof.
Yasuhiro Nakazawa
(Osaka University)
08/07/2015, 12:00
We present unusual low-temperature thermodynamic properties of two-dimensional organic triangle lattice compounds by single crystal calorimetry technique. The target compounds of this study are κ-(BEDT-TTF)2Cu2(CN)3, EtMe3Sb[Pd(dmit)2]2 and κ-H3(Cat-EDT-TTF)2, which are known as typical dimer Mott...
Dr
Andrzej Łapiński
(Institute of Molecular Physics, Polish Academy of Sciences, Poznań, Poland)
08/07/2015, 12:30
molecular magnets and nanomagnets
Organic molecular conductors formed by the bis(ethylenedithio)tetrathiafulvalene (ET) and anions with permanent magnetic moments exhibit various electronic states and physical properties, such as Mott insulator or charge ordering. Some time ago, a new κ-ET salt with Fe(CN)63- anions, N(C)2H)5))4+cations, and H2O...
Dr
Szymon Chorąży
(Department of Chemistry, The University of Tokyo)
08/07/2015, 12:50
multifunctional materials
Molecule-based magnets constructed of octacyanidometallates and complexes of 3d/4f metal ions are now attracting a considerable attention as they reveal the wide range of magnetic phenomena including ferromagnetism, metamagnetism, charge transfer or spin transitions, and slow relaxation of magnetization.[1] The implementation of other physical functionalities, including chirality,...
Dr
Anna Majcher
(Institute of Physics, Jagiellonian University, Kraków)
08/07/2015, 13:05
molecular magnets and nanomagnets
A detailed magnetic study of a family of magnetic polymers [CuII(55'-dmbpy)]2[WV(CN)8]X∙H2O (55'-dmbpy = 5,5'-dimethyl-2,2'-bipyridine) with different anions X: Br- (1) ,Cl-(2), NO3-(3) is presented.
The magnetic properties of all three analogues are similar, showing antiferromagnetic...
Mr
Piotr Konieczny
(Institute of Nuclear Physics PAN, Kraków)
08/07/2015, 13:20
molecular magnets and nanomagnets
The pressure measurements of magnetic materials give the opportunity to study the fundamental aspects of magnetism. In this study a molecular ferromagnet CoII(pyrazol)4]2[NbIV(CN)8]∙4H2O}n has been studied with the use of ac/dc magnetometry under hydrostatic pressure up to 13 kbar. The studied compound crystallizes...
Prof.
Friedrich Kremer
(Institute of Experimental Physics I, University of Leipzig, Germany)
09/07/2015, 09:00
soft matter and glassformers
The question on what length-scale molecular and especially glassy dynamics of polymers takes place is of fundamental importance and has multifold practical implications as well. Recent results based on Broadband Dielectric Spectroscopy [1,2] for nanometric thin (≥5 nm) layers of poly(styrene) [3], poly(methylmethacrylate) [4,5] and poly(cis-1,4-isoprene) [6] will be presented,...
Prof.
Michael Wübbenhorst
(KU Leuven, Department of Physics and Astronomy)
09/07/2015, 09:40
soft matter and glassformers
Physical vapor deposition (PVD) of super-cooled liquids into the glassy state yields occasionally glasses with extraordinary high packing density resulting in an extremely low fictive temperature and high kinetic stability [1]. While a couple of organic molecules have been proven to form (ultra)stable glasses, we have recently shown that PVD might also induce enhanced molecular order in...
Prof.
Marco Geppi
(University of Pisa)
09/07/2015, 10:10
Solid state Nuclear Magnetic Resonance Spectroscopy is able to give detailed bulk structural and dynamic information on solid systems and soft matter, representing one of the most powerful characterization techniques in several fields, ranging from pharmaceuticals to polymeric materials, from inorganic compound to hybrids, from liquid crystals to biological systems.
Structural information...
Dr
Claudia Forte
(ICCOM-CNR, Pisa)
09/07/2015, 10:40
Neohexanol (2,2-dimethyl-1-butanol, CH3CH2C(CH3)2CH2OH) and some of its isomers, differing for the positions of the OH and CH3 substituents, constitute a very interesting class of compounds showing a rich polymorphism with several solid-solid phase transitions. Indeed, due to their globular shape and to the possibility to...
Prof.
Wilfried Schranz
(University of Vienna)
09/07/2015, 11:30
soft matter and glassformers
Polyurea elastomeres exhibit phase separated mesoscopic structures with hard nanodomains embedded in a soft (compliant) matrix. This system shows (Fig.1) two glass transitions at Tg1<Tg2, which are related to the freezing of motion of molecular segments in the soft domains (α peak = usual polymer glass transition at Tg1) and to regions of restricted mobility near the hard nanodomains at Tg2...
Prof.
Kazuya Saito
(University of Tsukuba)
09/07/2015, 12:00
Our previous study based on structural thermodynamics [1-3] established that the conformation of alkyl chains attached to the end(s) of the rigid core part of mesogenic molecules is fully molten in any liquid crystalline (LC) mesophases. Besides, recently revealed is that the nano-segregated structure is a fundamental structure for layered (smectic) LCs formed by such molecules [4,5]....
Ms
Yuki Kawata
(Department of Chemistry, University of Tsukuba ; Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST))
09/07/2015, 12:30
Self-healing materials are expected to extend the lifetimes of a variety of products. Recently, we have developed a self-healing material using a particle/liquid-crystal (LC) composite gel containing an azobenzene compound. The particle/azo-doped LC composite gel showed the gel–sol transition by the trans–cis photoisomerization of an azo dopant. The photoinduced gel–sol...
Dr
Ewa Dryzek
(Institute of Nuclear Physics PAN, Kraków)
09/07/2015, 12:50
soft matter and glassformers
Probing of intermolecular or intramolecular regions in molecular solids by positron annihilation lifetime spectroscopy (PALS) is well established. In such substances, the formation and decay of positronium (Ps) – the positron-electron bound state is expected to be influenced by the nature of intermolecular interactions and the internal structure. Structural changes, phase transformations and...
Prof.
Jan Wąsicki
(Faculty of Physics, Adam Mickiewicz University, Poznań, Poland)
09/07/2015, 13:10
Recently, the phenomenon of polymorphism of therapeutic drugs has become the problem of increasing interest because of the common use of drugs in solid form, as tablets, powder inhalations, etc. The form of drug is sensitive to the effect of particular processes applied in drug production. Changes in the external conditions taking place in the process of drug production or storage can induce...
Prof.
Małgorzata Witko
(Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Kraków)
09/07/2015, 15:00
Heteropolyacids (HPA) belong to a group of compounds, which due to their acid-base and redox properties catalyze the broad spectrum of reactions both homogeneous and heterogeneous. This is due to their specific properties, among which versatility of electronic and geometry structures, chemical compositions, reaction performance, thermal stabilities and stabilities in solutions are worth to be...
Prof.
Nuria Lopez
(Institute of Chemical Research of Catalonia)
09/07/2015, 15:30
Modelling surfactant coated nanoparticles constitutes a great challenge as the properties of these materials in the nanoscale completely differ from the bulk counterparts. In this lecture I will provide some of the hints that make possible the investigation of properties like shape control and catalytic activity.[1-3]
References
[1] Almora-Barrios et al. NanoLett.2014, 14, 871
[2] Vile et...
Dr
Tomasz Martynski
(Faculty of Technical Physics, Poznań University of Technology, Poland)
09/07/2015, 16:00
Organic semiconducting materials have attracted much attention due to their potential application in field effect transistors with organic gate (OFETs), light-emitting organic layers in diodes (LEDs), inexpensive and flexible photovoltaic cells (OPVs), and a large variety of sensors. Commonly, organic semiconducting materials are classified as either p-type (hole-conducting) or n-type...
Dr
Przemysław Piekarz
(Institute of Nuclear Physics PAN, Kraków)
09/07/2015, 16:30
Recent developments in synchrotron radiation techniques enable to study dynamical properties of nanoscale systems such as thin films, nanoclusters, and nanowires.
Due to lower symmetry and dimensionality, the vibrational spectra of nano-systems may substantially differ from bulk crystals and strongly influence their thermo-elastic properties. Discovered 20 years ago, the nuclear inelastic...
Prof.
Marian Paluch
(Institute of Physics, University of Silesia)
09/07/2015, 17:20
The molecular studies of glass-forming liquids at elevated pressure become now a standard practice in many laboratories all over the word [1]. The addition of pressure as an external thermodynamic variable open a new perspective in understanding the fragility concept. The objective of this presentation is to show that the relaxation dynamics of van der Waals liquids, polymers and ionic liquids...
69.
Effect of pressure on time and length scales of molecular dynamics in the density scaling regime
Dr
Andrzej Grzybowski
(Institute of Physics, University of Silesia)
09/07/2015, 17:50
Our thorough analyses of high pressure experimental data of various glass formers that belong to different material groups (such as van der Waals supercooled liquids, polymer melts, and supercooled ionic liquids) clearly show that some previous suppositions concerning interrelations between time and length scales of molecular dynamics near the glass transition require revisiting. This is a...
Dr
Malgorzata Jasiurkowska-Delaporte
(NanoBioMedical Center, Adam Mickiewicz University, Poznań, Poland)
09/07/2015, 18:05
soft matter and glassformers
Owing to their outstanding physical and chemical properties carbon nanotunes (CNTs) are a promising material with potential applications in drug delivery systems, electronics and aerospace. The major challenge of the practical use of CNTs in medicine is enhancing of their ability to disperse in hydrophilic solvents. Chemical treatment with acids damages the graphite-like structure of CNTs and...
Prof.
Grazyna Bator
(Faculty of Chemistry, University of Wroclaw)
09/07/2015, 18:20
A forecast of the strength of hydrogen bonds in the molecular complexes is important in the designing of the novel organic materials exhibiting polar or semiconducting properties. In such materials, besides the formation of relatively strong hydrogen bonds we expect either the formation of infinite chains of molecules in the crystal lattice or the stacking alignment of molecules, which favors...
Prof.
Zbigniew Galewski
(Faculty of Chemistry, University of Wroclaw, Poland)
09/07/2015, 18:35
Liquid-crystalline azobenzene derivatives are today very important materials in modern opto-electronics [1,2]. Chiral moiety can induce extra new structures and physical properties. In this communication after short review about mesogenic chiral azobenzenes a new series of compounds are presented [3].
Four types of mesophases were identified: chiral nematic, smectic A*, smectic C* and TGBA....
Prof.
Ken Andersen
(European Spallation Source AB)
10/07/2015, 09:00
The European Spallation Source is currently under construction in Lund in the South of Sweden. Once fully operational in the early 2020's, ESS will be the world's leading neutron source for condensed-matter studies. The facility will be co-located with the MAX-IV high-brightness synchrotron and is being designed and constructed in partnership with a network of labs and universities distributed...
Werner Press
(IEAP, University of Kiel, Germany)
10/07/2015, 09:40
Neutron scattering data [1] representing rotational tunneling from CH4 & 0.25% O2 have been reanalyzed. They were taken at the time-of-flight spectrometer IN5 of the ILL with a wavelength of λ=13 Å. At a temperature T = 60 mK the sample was fully converted and consisted of a single spin species (A-methane). A-methane in phase II is characterized by just one tunneling...
Prof.
Daniela Uhríková
(Faculty of Pharmacy, Comenius University, Bratislava, Slovakia)
10/07/2015, 10:10
biology oriented systems
The pH profile of pathological tissues, such as upon acquisition of inflammation, infection, and cancer, is significantly different from that of the normal tissue. Also cellular components such as the cytoplasm, endosomes, lysosomes, endoplasmic reticulum, etc. are known to maintain their own characteristic pH values. For example, the pathway of the gene-vector complex is accompanied with the...
Mrs
Giovanna Fragneto
(Institut Laue-Langevin)
10/07/2015, 10:40
Current research in membrane protein biophysics highlights the emerging role of lipids in shaping membrane protein function. Cells and organisms have developed sophisticated mechanisms for controlling the lipid composition and many diseases are related to the failure of these mechanisms. One of the recent advances in the field is the discovery of the existence of coexisting micro-domains...
Mr
Tomas Lundqvist
(MAX IV Laboratory)
10/07/2015, 11:30
In biology one of the greatest scientific challenge comes from the need to study and model extremely complex systems that are constantly evolving at different time and length scales, particularly in a way that is computationally affordable. Even just a slightly improved ability to predict the fait of biological processes in time and/or space would have a tremendous impact on many areas of life...
Dr
Joachim Wuttke
(Forschungszentrum Jülich)
10/07/2015, 12:00
In some fields of research, data analysis is routine, either relying on the formal apparatus of hypothesis testing, or resulting in rock-solid conclusions that convince without further ado.
In other fields, however, including several neutron scattering techniques, data analysis appears to be more an art than exact science, with fit quality to be visually assessed by the experienced eyes, and...
Prof.
Piotr Pierański
(Poznań University of Technology, Poland)
10/07/2015, 12:30
As a rule, the scientific papers describing phenomena occurring in the nonlinear systems are illustrated with lots of plots. If the system in question is oscillating, the papers contain figures presenting the shape of the oscillations indicating what happens to them, when motion of the system evolves from the regular to the chaotic one. Sometimes the papers present also Fourier spectra, in...
Prof.
Piotr Zieliński
(Institute of Nuclear Physics PAN, Kraków)
10/07/2015, 12:50
A distribution of relaxation times results in relaxation describable by formulae more complex than a single decreasing exponential function. A known example is the stretched exponential function
u(t)=exp(-(t/τ)α), (1)
encountered in systems of very different nature starting from mechanical strain, electric and magnetic polarisation through...
Ms
Koyomi Nakazawa
(Department of Chemistry, University of Tsukuba)
soft matter and glassformers
The phase transition from the ordered gel phase (L&beta') to the disordered liquid-crystalline (L&alpha) phase of a phospholipid bilayer is important for the biomembrane functions. Although incorporated additives such as cholesterol are known to affect the transition behavior, detailed mechanisms have not been clarified. In the present study, the effect of...
