Photophysical properties of three coordinated copper(i) complexes bearing 1,10-phenanthroline and a monodentate phosphine ligand

Daichi Kakizoe; Michihiro Nishikawa; Yasuo Fujii; Taro Tsubomura

doi:10.1039/c7dt02938a

Photophysical properties of three coordinated copper(i) complexes bearing 1,10-phenanthroline and a monodentate phosphine ligand

Dalton Trans. 2017 Nov 7;46(43):14804-14811. doi: 10.1039/c7dt02938a.

Authors

Daichi Kakizoe¹, Michihiro Nishikawa, Yasuo Fujii, Taro Tsubomura

Affiliation

¹ Department of Materials and Life Science, Seikei University, Kichijoji-kitamachi, Musashino, Tokyo 180-8633, Japan. tsubomura@st.seikei.ac.jp.

PMID: 29039865
DOI: 10.1039/c7dt02938a

Abstract

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 μs 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.