Speaker
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.
