Three-dimensional gallium sulphide open frameworks

The synthesis and crystal structure of four gallium sulphide open frameworks, built from supertetrahedral clusters, are described. The structures Of [C4NH12](6)[Ga10S18] (1) and [C4NF11](112)[Ga20S35.5(S-3)(0.5)O] (2) contain supertetrahedral T3 clusters, while in the isostructural compounds [C4NH12](16)[Ga10S18M4Ga16S33] (IV = CO (3), Zn (4)), T3 and T4 clusters alternate. These materials exhibit threedimensional frameworks, with topologies consisting of two interpenetrating diamond lattices, and contain over 50% of solvent accessible void space. UV-Vis diffuse reflectance measurements indicate that these compounds are semiconducting, with band gaps over the range 3.4-4.1 eV. (c) 2006 Elsevier Ltd. All rights reserved.