Jul 6 – 10, 2015
Institute of Nuclear Physics PAN, Kraków
Europe/Warsaw timezone

Tuning of magnetic ordering temperatures of Mn2Nb 3D chiral molecular magnet by pressure and guest molecules

Jul 7, 2015, 8:30 PM
1h 30m
Olimpia Conference Room (Crown Piast Hotel)

Olimpia Conference Room

Crown Piast Hotel

Board: 17

Speaker

Mr Bernard Czarnecki (Faculty of Chemistry, Jagiellonian University, Kraków)

Description

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 could lead to obtaining room temperature octacyanometalate-based magnets tunable by light, temperature, pressure or/and solvent[1,2]. Additionally with development of organic chemistry it is possible, by incorporating enantiopure ligands, to obtain chiral coordination networks. Co-existence of both magnetic and optical properties could give us a chance to examine thoroughly physical phenomena like magneto-chiral dichroism and magnetically induced second harmonic generation. Furthermore magnetic properties can be tuned by pressure-induced structural changes that cause the alteration of magnetic interaction between metal centres[1] leading to novel molecular switches.

Here we present 3D networks of {[MnII(S/R/rac-1,2-diaminopropane)2]2[NbIV(CN)8]•3H2O}n and its dependence of the magnetic ordering temperature on pressure and uptake/removal of guest molecules. The collected information allows to discuss the influence of the coordination skeleton on physical properties of the compound.

References:

[1] Fitta M., Bałanda M., Pełka R., Konieczny P., Pinkowicz D., Sieklucka B., Journal of Physics Condensed Matter, 2013, 25 ,49

[2] Pinkowicz D., Podgajny R., Gaweł B., Nitek W., Łasocha W., Oszajca M., Czapla M., Makarewicz M., Bałanda M., Sieklucka B., Angew. Chem. Int. Ed., 2011, 50, 3973-3977.

Primary author

Mr Bernard Czarnecki (Faculty of Chemistry, Jagiellonian University, Kraków)

Co-authors

Prof. Barbara Sieklucka (Faculty of Chemistry, Jagiellonian University, Kraków) Dr Dawid Pinkowicz (Faculty of Chemistry, Jagiellonian University, Kraków) Dr Wojciech Nitek (Faculty of Chemistry, Jagiellonian University, Kraków)

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