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

Tuning of magnetic field-induced properties of Mn<sub>9</sub>W<sub>6</sub>-based networks

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

Olimpia Conference Room

Crown Piast Hotel

Board: 8

Speaker

Mr Wojciech Nogaś (Faculty of Chemistry, Jagiellonian University, Kraków)

Description

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 structural/spin phase transitions. A variety of discrete and extended coordination frameworks could be attained by incorporation of organic ligands, as was demonstrated in previous research. These properties enable us to use the clusters as the secondary building blocks (SBBs) in multifunctional materials exploiting the external control of structural and magnetic state [1-4]. Using the blocking 4,4’-di-tert-butyl-2,2’-bipyridine (ditbubpy) and the bridging aldrithiol-4 (ald-4), we obtained two new compounds: {Mn9[W(CN)8]6(ditbubpy)8(MeOH)6(H2O)3(iPr2O)2} (1) and {Mn9[W(CN)8]6(ald-4)4(MeOH)24} (2). We successfully tuned the intercluster distances and overall spatial distribution of Mn9W6 secondary building block. 1 is composed of fairy distinguished 1-D supramolecular chains, while 2 contains 1-D coordination chains due to bridging and decorating function of ald-4, with more isotropic clusters distribution. This provided the opportunity to study magnetic field induced properties: slow magnetic relaxation and magnetocaloric effect. References [1] D. Pinkowicz, R. Podgajny, B. Nowicka, S. Chorąży, M. Reczyński, B. Sieklucka, Inorg. Chem. Front. 2015, 2, 10-27. [2] M. G. Hilfiger, H. Zhao, A. Prosvirin, W. Wernsdorfer, K. R. Dunbar, Dalton Trans. 2009, 5155–5163. [3] R. Sessoli, Angew. Chem. Int. Ed. 2012, 1, 43–45. [4] R. Podgajny, S. Chorąży, W. Nitek, M. Rams, A. M. Majcher, B. Marszałek, J. Żukrowski, C. Kapusta, B. Sieklucka, Angew. Chem. Int. Ed. 2013, 52, 896–900.

Primary author

Mr Wojciech Nogaś (Faculty of Chemistry, Jagiellonian University, Kraków)

Co-authors

Prof. Barbara Sieklucka (Faculty of Chemistry, Jagiellonian University, Kraków) Dr Maciej Kubicki (Faculty of Chemistry, Adam Mickiewicz University, Poznań) Dr Michał Rams (Institute of Physics, Jagiellonian University, Kraków) Mr Piotr Konieczny (Institute of Nuclear Physics PAN, Kraków) Dr Robert PEŁKA (Institute of Nuclear Physics PAN, Kraków) Dr Robert Podgajny (Faculty of Chemistry, Jagiellonian University, Kraków) Dr Szymon Chorąży (Faculty of Chemistry, Jagiellonian University, Kraków) Prof. Tadeusz Wasiutyński (Institute of Nuclear Physics PAN, Kraków)

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