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A low temperature solvothermal method has been successfully used for preparation of two semiconductor compounds CuSbQ{sub 2} (Q=S(1), Se(2)) by the reactions of Cu, Sb and S(or Se) powders in 1,2-diaminopropane at 160 deg. C for 10 days. The crystal structure of 2 was determined first time using single crystal X-ray diffraction analyses. The structures of 1 and 2 are discussed in the view of covalent bonds and weak interactions. Double CuSbQ{sub 2} layers are assembled to a 3-D network structure by Cu...Sb and Q...Sb secondary bonds. In contrast with the isostructure of the two materials, the crystal morphology of them is quite different, brick-like crystals for CuSbS{sub 2} and plank-like crystals for CuSbSe{sub 2}. The phenomenon is related to their different inter-planar interactions. Semiconductor properties of the microcrystal samples are measured and the band gaps of 1 and 2 are 1.38 and 1.05 eV, respectively. - Graphical abstract: Two isostructural compounds, CuSbQ{sub 2} (Q=S, Se), display different morphologies in crystals, which is explained by comparing the strength of the interlayer interactions based on the crystal structure data.

The title compound, catena-poly[[chloridotetrakis(ethylenediamine-kappa(2)N,N')samarium(III)] [indium(III)-di-mu-tellurido-indium(III)-di-mu-tellurido]], {[SmCl(C(2)H(8)N(2))(4)][In(2)Te(4)]}(n), consists of a one-dimensional sinusoidal {[InTe(2)](-)}(n) anionic chain and [SmCl(en)(4)](2+) cations (en is ethylenediamine). The only other previously reported lanthanide analogue, viz. [LaCl(en)(4)][In(2)Te(4)], contains more usual linear one-dimensional {[InTe(2)](-)}(n) anion chains [Chen, Li, Chen & Proserpio (1998). Inorg. Chim. Acta, 273, 255-258]. The one-dimensional polymeric {[InTe(2)](-)}(n) chain is built of InTe(4) tetrahedra sharing opposite edges. The Sm(III) ion in the [SmCl(en)(4)](2+) cation is nine-coordinated by eight N atoms from four bidentate en molecules and by one chloride ion to form a monocapped square-antiprismatic geometry. The presence or absence of N-H...Cl hydrogen bonding is shown to affect the conformation of the anion.

Two new indium selenides [In(en)2Se]2·2I (1) and [In(teta)Se]2·2I (2) (en = ethylenediamine, teta = triethylenetetramine) were obtained under mild solvothermal conditions and structurally characterized. Compounds 1 and 2 consist of unusual organic hybrid indium selenide cations and I− anions. These ions are assembled to two different supramolecular structures by N-H···I and N-H···Se H-bonds, namely extended 3-D network structure for 1 and extended sheet structure for 2. The optical band gaps of 2.92 eV for 1 and 3.15 eV for 2 were derived from optical absorption spectra. The thermal stability of 1 and 2 was investigated by thermogravimetric measurements.

Coordination of unsaturated [In(amine)]3+ onto indium telluride structure, where the complex ion has higher positive charge, not only forms an organic−inorganic hybrid polymeric structure, but also offers an indium telluride with positive charge. Based on this strategy, cationic networks of metal chalcogenide may be expected.