A hybrid linkage mode between T2,2 and T3 selenide clusters.

A multi-level 3D selenide framework in an In(3+)-Ge(4+) system was synthesized. The interconnection between super-supertetrahedral T2,2 and supertetrahedral T3 clusters via their terminal Se(2-) leads to a previously unknown hybrid T2,2-T3 linkage mode. The synthetic realization of this material represents another new level of complexity and demonstrates the versatility in the construction and property-engineering of cluster-based semiconducting materials.