Unraveling the Electronic Structures of Coordinative “Unsaturated” Complex Transition Metal Compounds by Raman Spectroscopy Dana E. Gheorghe1,2, Alexander P. Litvinchuk2,3, and Angela Möller1,2 1
Department of Chemistry, University of Houston, 136 Fleming Building, Houston, TX 77204-5003, USA; 2Texas Center for Superconductivity, University of Houston, 2002 Houston Science Center, Houston, TX 77204-5002, USA; 3Department of Physics, University of Houston, 617 Science & Research Building 1, Houston, TX 77204-5005, USA; *E-mail address:
[email protected]
Single crystals of Na5[MO2][CO3] (M = Co+, Ni+, Cu+) were synthesized by a special solid state synthesis method: the CdO-route [1], which involves a redox reaction in order to achieve the extraordinary low oxidation state of +1 in transition metal oxides. Furthermore, these compounds can be classified as rare examples of coordinative “unsaturated” complex metallates (C.N. 2, dumbbell) in the solid state. The crystal structures of these uncommon oxides have been determined [2, 3]. Based on our IR and Raman investigations of single crystals, new insights into the ground and excited states of Co+ (3d8) were obtained.
[1] Möller, A. Z. Anorg. Allg. Chem. 2005, 631, 2285. [2] Möller, A. Z. Anorg. Allg. Chem. 2001, 627, 2625. [3] Amann, P., Möller, A. Z. Anorg. Allg. Chem. 2003, 629, 1643.
