Hydrothermal syntheses and characterization of two tetramethylammonium templated indium sulfides

Two indium sulfides [(Me)4N]6[In10S18] (1) and [(Me)4N]13[Cu5In30S54] (2) have been hydrothermally synthesized. Compound 1 is a 3D open framework built from T3 clusters, which has large porosity. Compound 2 has a double-layered structure constructed by T5 clusters. Our results indicate that tetramethylammonium ion is an efficient structure-directing agent for both ternary and quaternary indium sulfides. The optical and thermal properties have also been investigated.