(1,4-dabH)2MnSnS4: The first thiostannate with integrated Mn2+ ions in an anionic chain structure

The new thiostannate (1,4-dabH)2MnSnS4 (1,4-dab = 1,4-diaminobutane) was synthesized under solvothermal conditions. The compound crystallizes in the non-centrosymmetric space group Fdd2 with a = 22.8124(15) Å, b = 24.7887(16) Å, c = 6.4153(6) Å, Z = 8, and V = 3627.8(5) Å3. The structure consists of one-dimensional straight anionic chains composed of alternating SnS4 and MnS4 tetrahedra sharing common edges. The chains are directed along [001] and are surrounded by the organic cations which form undulated chains along [100] by strong intermolecular N–H⋯N hydrogen bonding interactions. Several S⋯H contacts suggest weak interactions between the anionic chains and the cations. The band gap amounts to 2.9 eV indicating that the compound is a photo-conductor. The compound is stable up to about 190 °C and decomposes in two distinct steps above this temperature.

The [MnSnS4]2− chain formed by edge-sharing MnS4 and SnS4 tetrahedra.Figure optionsDownload as PowerPoint slide