Chemistry Seminar Series: Dr. Stefanie DehnenExport this event to calendar

Monday, June 16, 2014 — 2:30 PM EDT

The right mix: Compounds with multinary polyanions

Dr. Stefanie Dehnen
Department of Chemistry
Philipps-Universität
Marburg, Germany

Monday, June 16, 2014
2:30 p.m.
C2 361 (Reading Room)

Abstract:  Multinary, non-oxidic metallates as well as metallides are currently actively investigated by many research groups, leading from structural studies through functional analyses to the generation of innovative materials.1 Binary main group element aggregates proved to be useful synthetic tools for a large variety of different structural and functional motifs within ternary or multinary transition metal/main group metal/non-metal clusters and networks.2

Whereas chalcogenidotrielate/tetrelate ions [E13/14xE16y]q– (E13/14 = Ga, In; Ge, Sn; E16 = S, Se, Te) may be basically viewed as heavier homologues of silicates or borates, the inversely polarized pnictogentrielide/tetrelide ions [E13/14xE15y]q– (E13/14 = Ga, In; Ge, Sn, Pb; E15 = As, Sb, Bi) have a distinct tendency to form so-called intermetalloid clusters.3

Dehnen Seminar

However, in both cases, the products of reactions with transition metal compounds differ significantly from any lighter homologues, as they represent unprecedented, ternary clusters or networks, according to the general type [MxE13/14yE16z]q–, or ternary Zintl anions [MxE13/14yE15z]q–. The physical properties of the compounds, which may represent (photo-) semi-conductors, ion conductors or bond-activating nano-capsules, are dependent on the nature of the involved elements and the observed structure type.4–8 Also ionothermal techniques were successfully applied for the synthesis of novel salts of such complex anions.9

(1) P. Feng, X. Bu, N. Zheng, Acc. Chem. Res. 2005, 38, 293. (2) S. Dehnen, M. Melullis, Coord. Chem. Rev. 2007, 251, 1259. (3) F. Lips, R. Clérac, S. Dehnen, J. Am. Chem. Soc. 2011, 133, 14168. (4) Z. Hassanzadeh Fard, M. Reza Halvagar, S. Dehnen, J. Am. Chem. Soc. 2010, 32, 2848. (5) F. Lips, M. Hołyńska, R. Clerac, U. Linne, I. Schellenberg, R. Pöttgen, F.Weigend, S. Dehnen, J. Am. Chem. Soc. 2012, 134, 1181. (6) R. Ababei, W. Massa, K. Harms, X. Xie, F. Weigend, S. Dehnen, Angew. Chem. Int. Ed. 2013, 52, 13544. (7) B. Weinert, A.R. Eulenstein, R. Ababei, S. Dehnen, Angew. Chem. Int. Ed. 2014, 53, 4704. (8) P. Bron, S. Johansson, K. Zink, J. Schmedt auf der Günne, S. Dehnen, B. Roling, J. Am. Chem. Soc. 2013, 135, 15694. (9) Y. Lin, W. Massa, S. Dehnen, J. Am. Chem. Soc. 2012, 134, 4497.

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