Solvothermal Syntheses, Crystal Structures and Optical Properties of New Members of Transition Metal Complexes Based on Hexaselenidobistannate Ligand

• Published in: Journal of chemical crystallography 2017-10, Vol.47 (5), p.133-139
• Main Authors: Sun, Pei-pei, Liu, Shu-zhen, Shen, Ya-li, Tang, Chun-ying, Han, Jing-yu, Liu, Yun, Jiang, Wen-qing, Jia, Ding-xian
• Format: Article
• Language: English
• Subjects: Bridging; Chemistry; Chemistry and Materials Science; Coordination compounds; Crystal structure; Crystallography and Scattering Methods; Inorganic Chemistry; Ligands; Metals; Optical properties; Organometallic Chemistry; Original Paper; Physical Chemistry; Solvents; Zinc
• ISSN: 1074-1542; 1572-8854
• DOI: 10.1007/s10870-017-0689-8

Two zinc binuclear complexes based on a hexaselenidobistannate bridging ligand, [{Zn(tren)} 2 ( μ -Sn 2 Se 6 )] ( 1 ) and [{Zn(tepa)} 2 ( μ -Sn 2 Se 6 )] ( 2 ) were prepared by solvothermal reactions of Zn, Sn, and Se in tris(2-aminoethyl)amine (tren) and tetraethylenepentamine (tepa) solvents, respectively. Compound 1 crystallizes in monoclinic space group C 2/c, while 2 in tetragonal I4 1 / a . Acting as a bidentate bridging ligand, the bimeric [Sn 2 Se 6 ] 4− anion joins two [Zn(tren] 2+ or two [Zn(tepa] 2+ units via two trans terminal Se atoms to form the binuclear complexes 1 and 2 , respectively. The Zn 2+ ion is in a trigonal bipyramidal environment in 1 and in an octahedral environment in 2 . Compounds 1 and 2 show well-defined absorption edges with band gaps of 2.38 and 2.31 eV at room temperature. Graphical Abstract New transition metal complexes base on hexaselenidobistannate ligand, [{Zn(tren)} 2 ( μ -Sn 2 Se 6 )] and [{Zn(tepa)} 2 ( μ -Sn 2 Se 6 )] were solvothermaly synthesized in tren and tepa (tren = tris(2-aminoethyl)amine, tepa = tetraethylenepentamine) solvents, respectively.