Preparation, Structure and Optical Properties of [CH₃SC(NH₂)₂]₃SnI₅, [CH₃SC(NH₂)₂][HSC(NH₂)₂]SnBr₄, (CH₃C₅H₄NCH₃)PbBr₃, and [C₆H₅CH₂SC(NH₂)₂]₄Pb₃I₁₀

Abstract

Abstract The preparation, crystal structure and optical absorption spectra of [CH 3 SC(NH 2 ) 2 ] 3 SnI 5 (1), [CH 3 SC(NH 2 ) 2 ][HSC(NH 2 ) 2 ]SnBr 4 (2), (CH 3 C 5 H 4 NCH 3 )PbBr 3 (3), and [C 6 H 5 CH 2 SC-(NH 2 ) 2 ] 4 Pb 3 I 10 (4) are reported. The compounds 1, 2, 3 consist of MX 6 -octahedra (M = Sn, Pb, X = I, Br) forming one-dimensional single chains (compounds 1, 3) or double chains (compound 2). The compound 4 forms a two-dimensional inorganic network via corner sharing of three face sharing octahedral units. Because of their low-dimensional character, a blue shift of the excitonic absorption bands, in comparison to those of higher dimensionality systems, is observed.