{[M(NH3)6][Ag4M4Sn3Se13]}∞ (M=Zn, Mn): Three-dimensional chalcogenide frameworks constructed from quaternary metal selenide clusters with two different transition metals
Herein we report solvothermal syntheses of two new three-dimensional chalcogenide frameworks {[M (NH3)(6)][Ag4M4Sn3Se13]}(n) (M=Zn (1), Mn (2)), which consist of quaternary metal selenide clusters with two different transition metals. The compounds represent the first Ag-Zn/Mn-Sn-Se based quaternary anionic frameworks. The optical studies show that the band gaps for 1 and 2 are 2.09 eV and 1.71 eV, respectively. Moreover, the photoelectrochemical study indicates that compound I displays n-type semiconducting behaviour and is photoactive under visible light illumination (lambda > 400 nm). (C) 2014 Elsevier Inc. All rights reserved.