Excited state properties of Tl2B12H12. Metal-centered photoluminescence

The compound Tl2B12H12 which consists of icosahedral View the MathML sourceB12H122- anions and Tl+ cations shows a metal-centered r.t. luminescence at λ max = 530 nm which originates from the lowest-energy sp triplet of Tl+. This emission indicates a considerable covalent interaction between Tl+ and View the MathML sourceB12H122- which is based on the hydridic nature of the boron cluster.