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

Azine and polyazine N-oxide ligands for novel magnetic molecular materials

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

Olimpia Conference Room

Crown Piast Hotel

Board: 19

Speaker

Ms Anna Hoczek (Faculty of Chemistry, Jagiellonian University, Kraków)

Description

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 distribution of coordinated atoms, (ii) distribution of charge density (iii) and overall flexibility (or rigidity). Further, the number of properties could be introduced or supported in the final products, such as chirality, magnetic interactions, photomagnetism, luminescence, porosity, conductivity, catalysis and others [1-5]. During the last decade an old group of azine and polyazine N-oxides emerged in the field of coordination chemistry for novel functional materials, particularly in CN-, SCN- or N3- bridged systems with long range magnetic ordering or very recently in hybrid complex salts [6,7]. They offer a good alternative for selective and directional binding and connecting of d and f metal ions, compared to formerly exploited purely N-donor amines, imines, Schiff bases and others. Along this line we present novel CoII-L-[WV(CN)8]3- (L = selected-N-oxides) supramolecular porous networks composed of low dimensional CoII-CN-WV linear or zig-zag skeletons and mononuclear CoII complexes, contributing to the overall magnetic properties with local magnetic exchange coupling and slow magnetic relaxation processes. The channel systems hosting hydrogen bonded coordination and/or crystallization H2O is discussed in terms of potential molecular exchange/sorption properties and their impact on magnetic properties and conductivity. References [1] S. Batten, Coordination Polymers, RSC Publishing (2009). [2] B. Nowicka et al., Coord. Chem. Rev. 256 (2012) 1946. [3] H. Tokoro and S. Ohkoshi, Dalton Trans. 40 (2011) 6825. [4] S. Chorąży, K. Nakabayashi, S. Ohkoshi, B. Sieklucka, Chem. Mater. 26 (2014) 4072. [5] D. Pinkowicz, Z. Li, P. Pietrzyk, M. Rams, Cryst Growth Des. 14 (2014) 4878. [6] Ma, B.-Q.; Sun, H.-L.; Gao, S.; Su, G.; Chem. Mater. 13 (2001) 1946. [7] R. Podgajny et al., Cryst. Growth Des. 14 (2014) 4030.

Primary author

Ms Anna Hoczek (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, Poland) Dr Robert Podgajny (Faculty of Chemistry, Jagiellonian University, Kraków) Dr Szymon Chorąży (Faculty of Chemistry, Jagiellonian University, Kraków)

Presentation materials