Two-dimensional assembly of tetrahedral chalcogenide clusters with tetrakis(imidazolyl)borate ligands.

A new two-dimensional inorganic-organic hybrid solid, formulated as Cd(17)S(4)(SPh)(25)B(im)(4) (SPh = benzenethiolate, im = imidazolate), has been synthesized under solvothermal conditions. The structure features a 6(3) network with 17-nuclear cadmium clusters linked by B(im)(4)(-) ligands. The compound is a semiconductor with the band gap of 2.66 eV and displays a green luminescence upon excitation at 390 nm.

New semiconducting coordination polymers from zinc sulfide clusters and chains.

Two new semiconducting zinc coordination polymers, Zn(8)S(SPh)(14)(bpy) (1) and Zn(2)(SPh)(4)(bpy) (2), have been synthesized by a dual-ligand approach. Single-crystal structural analyses indicate that compound 1 has a helical-chain structure with P1 clusters bridging with bipyridyl (bpy) ligands and compound 2 possesses a layered structure with zinc sulfide chains cross-linked with bpy ligands. The diffuse-reflectance spectra reveal that the band gaps of the two compounds are 2.41 eV for 1 and 2.56 eV for 2.