A New Copper(I) Complex Based on Imidazole and Triphenylphosphine Ligands: Synthesis, Structure, Third‐Order NLO, and Fluorescence Properties

Abstract

A new candidate [Cu(PPh3)2Him]Br (1, PPh3=triphenylphosphine, Him=1‐H‐imidazole) for nonlinear optical (NLO) materials has been synthesized and characterized crystallographically. The third‐order NLO optical properties were measured by the Z‐scan technique with an 8 ns pulsed laser at 532 nm. Compound 1 exhibits strong NLO absorptive abilities [α2=(61±5)×10−12] and effective self‐focusing performance [n2=(15±3)×10−18 m2·W−1] in 1.01×10−4 mol·dm−3 DMF solution. The compound also exhibits luminescence in DMF solution at room temperature and shows narrow emission with maximum at 382 nm. The electronic structure and photoluminescent process were investigated by means of TD‐DFT calculations. The results suggest that the contribution to the frontier orbitals from the CuBr δ bond plays a crucial role in its linear optical properties, and the origin of luminescence is attributable to the π∗︁→n transitions.

Adsorption of Chromium on Composite Microspheres of Chitosan and Nano Iron Oxide

“…[16,17] Iron oxide with high surface energy and surface area has strong adsorption capability with respect to many inorganic ions and organic matters. The combined technique of biosorption and magnetic separation holds the advantageous flexibility, ecofriendly characteristic and economic in operational cost.…”