Synthesis and luminescent properties of three excellent yellow emissive Cu() complexes based on the diphosphine ligand and the diimine ligand

In this study, three excellent yellow emissive Cu( i ) complexes were synthesized, namely [Cu 2 I 2 (bipy)(POP) 2 ]·4CH 2 Cl 2 ( 1 ), [Cu 2 Br 2 (bipy)(POP) 2 ]·4CH 2 Cl 2 ( 2 ), and [CuCl(bipy)(POP)]·CH 2 Cl 2 ·CH 3 OH ( 3 ) [bipy = 4,4′-bipyridine, POP = bis(2-diphenylphosphino-phenyl)ether]. The...

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Published in:CrystEngComm 2024-04, Vol.26 (17), p.2297-235
Main Authors: Mou, Wen-Long, Gao, Cheng-Jie, Li, Zi-Xi, Fan, Si-Jie, Hou, Chuan-Bin, Zhao, Jing-Tong, Zhang, Shuai, Li, Zhong-Feng, Han, Hong-Liang, Duan, Chun-Bo, Wang, Guo, Jin, Qiong-Hua
Format: Article
Language:English
Subjects:
Copper chloride
Dichloromethane
Ligands
Light emission
Luminescence
Optical properties
Synthesis
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Summary:In this study, three excellent yellow emissive Cu( i ) complexes were synthesized, namely [Cu 2 I 2 (bipy)(POP) 2 ]·4CH 2 Cl 2 ( 1 ), [Cu 2 Br 2 (bipy)(POP) 2 ]·4CH 2 Cl 2 ( 2 ), and [CuCl(bipy)(POP)]·CH 2 Cl 2 ·CH 3 OH ( 3 ) [bipy = 4,4′-bipyridine, POP = bis(2-diphenylphosphino-phenyl)ether]. The synthesis and characterization of three complexes are introduced. Complexes 1-3 have luminescent emission peaks of 529-532 nm, belonging to yellow light emission, and their quantum yield is 72-88%. Complex 2 exhibits an exceptionally high quantum yield of 88% and its lifetime is 9.6 μs. Among the available data, this result is one of the best luminescence results for yellow luminescent cuprous complexes. This study enriches the understanding of the photophysical properties of Cu( i ) complexes and offers new insights for the development of efficient OLED materials. High quantum yield (72-88%) yellow-emitting Cu( i ) complexes obtained by tuning the nitrogen ligands and anions.
ISSN:1466-8033
1466-8033
DOI:10.1039/d4ce00206g