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Synthesis, Characterization and Photophysical Properties of Hybrid N-Heterocyclic Carbene Complexes of Copper

Synthesis, Characterization and Photophysical Properties of Hybrid N-Heterocyclic Carbene Complexes of Copper

Name:
Matt Bardeaux

Department:
Chemistry

Abstract:
Photoluminescent Cu(I) complexes have attracted a great deal of attention as inexpensive alternatives to the heavy metal-based light emitters. Despite the emissive properties comparable to those of third-row transition metals and successful applications of luminescent Cu(I) complexes in various organic and biological sensors, the Cu-based materials have not been as well-developed as their third-row metals counterparts. Since the photoluminescent properties of transition metals are controlled by their electronic structures, it is of great relevance to obtain deeper knowledge of their chemical and photophysical properties in order to tune them in a more predictable manner. Recently, neutral three-coordinate Cu(I) complexes bearing monodentate N-heterocyclic carbene (NHC) ligands have been reported as moderate to efficient luminescent complexes in solution at room temperature. Herein, we report the synthesis of several air-stable Cu(I) complexes with hybrid coordination environment consisting of NHCs and highly conjugated diazodiene (mesBIAN, DippDAD, and Phen) ligands. All the complexes were fully characterized by 1H NMR, elemental analysis and X-ray crystallography. We have also examined their electronic absorption and emission using UV-Vis and fluorescence spectroscopy.