Synthesis, crystal structure and properties of [(dien)2Mn]Ge2S4 with mixed-valent Ge centers

One new manganese thiogermanate, [(dien)(2)Mn]Ge2S4 (dien=diethylenetriamine), was prepared under mild solvothermal conditions and structurally and spectroscopically characterized. The title compound crystallizes in the orthorhombic system, chiral space group P2(1)2(1)2(1) (no. 19) with a=9.113(4) angstrom, b=12.475(5) angstrom, c=17.077(7) angstrom, V=1941.5(15) angstrom(3) and Z=4. Its structure features a three-dimensional (3D) network composed of a one-dimensional (1D) [Ge2S4](2-) anionic chain and a [(dien)(2)Mn](2+) complex interconnected via various hydrogen bonds. The most interesting structural feature of the compound is the presence of two different oxidation states of germanium centers in the 1D [Ge2S4](2-) chain, which is also supported by the result of X-ray photoelectron spectroscopy measurement. The optical property of the title compound has also been studied by UV-vis spectra. (C) 2013 Elsevier Inc. All rights reserved.