Abstract
A series of neutral luminescent tetranuclear and mononuclear copper(I) halide complexes, -[Cu4I4(dpna)(4)] (1) and [CuX(dpna)(2)] dpna = 1-(diphenylphosphino) naphthalene, X = Br (2), Cl (3), were synthesized, and their molecular structures and photophysical properties were investigated. Complex 1 has a cubane-like structure with four Cu atoms pseudo-tetrahedral and four I atoms serving as mu(3)-bridges. The coordination geometry of the copper centers in 2-3 are trigonal-planar. In the solid state, complexes 1-3 display blue photoluminescence (lambda(max) = 423463 nm) at 298 K. The emission of the complexes originate from the (sigma+ X)-> pi* transition. All three complexes displayed good thermal stability.