Solvothermal Synthesis of two 2‐D Thioantimonates(III) with Metal Complexes as Template Ions, [M(dap)3]Sb4S7 (M = Ni2+ and Co2+)

Abstract

AbstractTwo new thioantimonates [M(dap)3]Sb4S7 (M = Ni2+ (1) and Co2+ (2)) were synthesized under solvothermal conditions by the reaction of NiS (or Co metal), Sb and S in an aqueous solution of 1,2‐diaminopropane (dap). Compounds 1 and 2 are isostructural. The polymeric [Sb4S72−]n anion is composed of two SbS3 trigonal pyramids and two SbS4 units. The SbS3 and SbS4 units are interconnected by corners and edges to build a 2‐D puckered layer with Sb4S4 and Sb16S16 heterorings. The apertures of the large Sb16S16 hetero‐rings are filled by two [M(dap)3]2+ complex cations which serve as template ions. The band gaps of 2.44 eV for 1 and 2.43 eV for 2 have been estimated from optical absorption spectra.