title: The layered thiostannate (dienH2)Cu2Sn2S6: a photoconductive inorganic-organic hybrid compound.
abstract: The new inorganic-organic hybrid compound (dienH2)Cu2Sn2S6 (dien = diethylenetriamine) was synthesized under solvothermal conditions. It crystallizes in the tetragonal space group I4m2 with a = 7.8793(3) A, c = 24.9955(15) A, and V = 1551.80(13) A(3). The structure consists of anionic [Cu2Sn2S6](2-) layers extending in the (001) plane and protonated amine molecules as charge compensating ions sandwiched between the layers. The layered [Cu2Sn2S6](2-) anion is composed of a single layer of edge-sharing CuS4 tetrahedra which is joined above and below to straight chains constructed by corner-sharing SnS4 tetrahedra. The material is a semiconductor with an optical band gap of 1.51 eV. More interestingly, preliminary results demonstrate that the compound exhibits photoconductive properties with an increase of the conductivity by a factor of 3 when irradiated with UV light. Upon heating in an inert atmosphere the compound starts to decompose at about 256 degrees C.
authors.affiliation: Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Olshausenstrasse 40-60, 24098 Kiel, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Pienack
authors.forename: Angela
authors.initials: A
authors.lastname: Puls
authors.forename: Christian
authors.initials: C
authors.lastname: Näther
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Bensch