Two Gallium Antimony Sulfides Built on a Novel Heterometallic Cluster

Two gallium antimony sulfides, [Ni(en)3][Ga2Sb2S7] (1) and [(Me)2NH2]2[Ga2Sb2S7] (2), have been prepared under mild solvothermal conditions. Both structures feature a two-dimensional network in which two GaS4 tetrahedra and two SbS3 trigonal pyramids are combined to form a heterometallic cluster of {Ga2Sb2S9} as a new secondary building unit. The thermal properties of 1 and 2 have been studied by thernogravimetric analysis, and the optical properties of 1 and 2 have been characterized by UV−vis spectra.