Octacyanometalate Networks.
We find that treatment of several binary p-toluenesulfonates (tosylates) with octacyanometalate salts readily afford a series of structurally related one- and two-dimensional crystalline networks of [MII(DMF)4]3[MV(CN)8]2 stoichiometry (MV = Mo, W; MII = Mn, Fe, Co, Ni). Magnetic measurements indicate that the 2-D lattices are ferrimagnets (for MII = Mn, below left) while 1-D analogues do not exhibit long-range magnetic ordering (right).
Magnetic Networks
Research Projects
Polymerization
Current Funding
NSF CAREER,
CHE 0645414, (2007-2012)
UMSL Start-up (2008-2010)
Selected Publications
“Syntheses, Structures, and Magnetic Characterization of One- and Two-Dimensional Octacyanometalate(V) Networks: {[MII(DMF)4]3[MV(CN)8]2}n (MII = Mn, Ni; MV = Mo, W),” Withers, J. R.; Li, D.; Triplett, J.; Ruschman, C.; Parkin, S.; Wang, G.; Yee, G. T.; Holmes, S. M. Polyhedron 2007, 26, 2353-2366.
“A Two-Dimensional Octacyanomolybdate(V)-Based Ferrimagnet: {[MnII(DMF)4]3[MoV(CN)8]2}n,” Withers, J. R.; Li, D.; Triplett, J.; Ruschman, C.; Parkin, S.; Wang, G.; Yee, G. T.; Holmes, S. M. Inorg. Chem. 2006, 45, 4307-4309.
“Synthesis and Spectroscopic and Magnetic Characterization of Tris(3,5-dimethylpyrazol-1-yl)borate Iron Tricyanide Building Blocks, a Cluster, and a One-Dimensional Chain of Squares,” Li, D.; Parkin, S.; Wang, G.; Yee, G. T.; Holmes, S. M. Inorg. Chem. 2006, 45, 1951-1959.
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Poly(pyrazolyl)borate Tricyanide Networks.
Treatment of a series of tricyano pyrazolylborates with binary triflates afford a series of molecular clusters and network materials. We previously found that several tetranuclear clusters (left) may be trapped in situ to afford crystalline 1-D networks that can be described as a one dimensional chain of clusters (middle); magnetic measurements are underway. Use of tosylate salts afford a structurally related 1-D chains of squares (right) and magnetic studies indicate that the p-toluenesulfonate ions are poor superexchange paths. Current efforts are directed towards the preparation of structurally related single chain magnets and photoresponisive lattices.
