Ionothermal syntheses and optical property of chromium selenidostannates containing linear polyamine ligand

• Published in: Inorganic chemistry communications 2014-09, Vol.47, p.148-151
• Main Authors: Lu, Jia-Lin, Tang, Chun-Ying, Wang, Fang, Shen, Ya-Li, Yuan, Ya-Xian, Jia, Ding-Xian
• Format: Article
• Language: English
• Subjects: Chromium; Ionothermal syntheses; Selenidostannates; X-ray structure determination
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2014.07.037

Ternary chromium selenidostannates [Cr(tepa)(OH)]2Sn2Se6·H2O (tepa=tetraethylenepentamine) (1) and [Cr(peha)]2(Sn2Se6)Cl2 (peha=pentaethylenehexamide) (2) were successfully synthesized by the reaction of CrCl3·6H2O, Sn, Se and tepa or peha in ionic liquid 1-ethyl-3-methylimidazolium chloride at 160°C. In the ionic liquid, the Cr3+ ion forms [Cr(tepa)(OH)]2+ or [Cr(peha)]3+ chelating complex cations, which lead to the formation of chromium selenidostannates 1 and 2. But the reactions in pure tepa or peha under solvothermal conditions produced amorphous powders. 1 and 2 are the first examples of TM-complex contained chalcogenidostannates synthesized by ionothermal technique. Both 1 and 2 form three-dimensional networks via intermolecular NH⋯Se, OH⋯Se and NH⋯O or NH⋯Cl interactions, respectively. 1 and 2 exhibit possible semiconducting properties with the band gaps at 2.08 and 2.19eV, respectively. Chromium selenidostannates [Cr(tepa)(OH)]2Sn2Se6·H2O (1) and [Cr(peha)]2(Sn2Se6)Cl2 (2) were firstly prepared under ionothermal conditions. 1 and 2 are the first examples of ionothermally synthesized chalcogenidostannates containing TM-complexes. [Display omitted] •Chromium selenidostannates 1 and 2 were firstly prepared using ionothermal methods.•1 and 2 are the first examples of ionothermally synthesized TM-chalcogenidostannates.•The chromium selenidostannates exhibit optical band gaps of 2.08 and 2.19eV.