Synthesis, crystal structure, and photoluminescence of a dumbbell-like sodium dicyanamide compound with 15-crown-5

Abstract

Abstract Gaseous diffusion of n-hexane into the reaction mixture of sodium dicyanamide NaN(CN)2 with 15-crown-5 in tetrahydrofuran leads to a sodium dicyanamide compound [Na(15-crown-5)]N(CN)2 (1). Compound 1 exhibits a centrosymmetric dumbbell-like structure constructed by dicyanamide ligands double-bridging [Na(15-crown-5)]+ moieties with a μ-1,5 coordination mode. Solid-state photoluminescence experiments have shown that compound 1 emits violet luminescence, and its possible emission mechanism was investigated in detail based on theoretical calculations.