An infinite square lattice of super-supertetrahedral T6-like tin oxyselenide clusters

Abstract

A new super-supertetrahedral cluster, resembling a coreless supertetrahedral T₆ cluster, was made as a tin oxyselenide by integrating hard and soft Lewis bases (O²⁻ and Se²⁻) into the tetravalent system. Its hierarchical architecture, built from supertetrahedral T₃-[Sn₁₀O₄Se₂₀] and Sn₂Se₆ clusters, represents a new level of complexity in the cluster-based construction. Compared to pure tin selenides, the new tin oxyselenide material in this work shows much enhanced stability and size-dependent band energy level.