期刊
JOURNAL OF COORDINATION CHEMISTRY
卷 70, 期 23, 页码 3907-3919出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2017.1415432
关键词
Neutral; Cu(I) complexes; photoluminescence; synthesis; 2,2 '-Bis(diphenylphosphino) biphenyl
资金
- National Natural Science Foundation of China [21671061]
- Natural Science Foundation of Hubei Province of China [2013CFA087]
- Hubei Province High-End Talent Training Program
- Areas of Excellence Scheme, University Grants Committee of HKSAR, China [AoE/P-03/08]
- Hong Kong Polytechnic University [1-ZE1C]
Copper(I) halide complexes having thermally activated delayed fluorescence (TADF) and phosphorescence have attracted much attention. Here, a series of four-coordinate dinuclear copper(I) halide complexes, [CuX(bpbp)](2) (bpbp = 2,2'-bis(diphenylphosphino) biphenyl, X = I (1), Br (2) and Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. The structural analysis reveals that two copper(I) centers are bridged by two halogen ligands to form a dinuclear structure with a four-membered Cu2X2 ring. These complexes exhibit yellow to blue emission in the solid state at room temperature and have peak emission wavelengths at 575-487 nm with microsecond lifetimes (t = 6.2-19.8 mu s) and low emission quantum yields (< 0.01%). The emissions of 1-3 originate from MLCT, XLCT, and IL (intraligand) transitions. Three complexes displayed good thermal stability.
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