- ROYAL SOC CHEMISTRY
We report the synthesis and photophysical properties of Cu(I) complexes with 1,10-phenanthroline (phen) and monodentate phosphine ligands. Single crystal X-ray structural analysis revealed that these have three-coordinated trigonal planar geometries. We also found that one of them, [Cu(phen)(Johnphos)] BF4 (Johnphos = 2-(di-tert-butylphosphino) biphenyl), is considerably emissive both in solution and solid states. The emission maximum wavelength of the emission of the complex is 580 nm, and the lifetime of the emission is 2 mu s in solution. Moreover, we have systematically investigated the photophysical and redox properties of four-coordinate complexes [Cu(NN)(P)(2)](+) in addition to three-coordinate complexes [Cu(NN)(P)](+). Charge transfer transitions play a key role in the photophysics of these complexes.
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