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Synthesis and Characterizations of Strongly Phosphorescent Copper(I) Halide Complexes with Bridged Bis[2-(diphenylphosphino)phenyl]ether Ligand

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Abstract

A series of strongly phosphorescent copper(I) halide complexes, namely [Cu(μ-X)POP]2 (X = Cl (1), Br (2), I (3), Br0.5Cl0.5 (4), POP = bis[2-(diphenylphosphino)phenyl]ether), have been synthesized by reacting CuX with the diphosphine ligand in 1:1 molar ratio. All complexes were characterized by spectroscopic analysis (IR, UV–Vis), elemental analysis, and photoluminescence study. Single-crystal X-ray diffraction revealed that complex 2 is a dinuclear structure which is constructed by two μ-X bridges and two POP ligands as μ2 bridges. Other complexes were determined as isologues of complex 2 by powder X-ray diffraction and elemental analysis. All complexes exhibit intense blue-green phosphorescence with a lifetime of ~1 μs in the solid state. The halogen-mixed complex presents a lightly change in the luminescence comparing to that of parent complexes. The excited states of all complexes have been assigned as halide-to-ligand charge transfer state mixed metal-to-ligand charge transfer character based on the time-dependent density functional theory calculations. All complexes are thermally stable according to thermogravimetric analysis so that they are suitable for applying in luminescent devices.

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Acknowledgments

The authors are grateful for financial support from the National Natural Science Foundation of China (project no. 61205184, 11175169), the Foundation of State Key Laboratory of Structural Chemistry (project no. 20110011), and the Natural Science Foundation of Zhejiang Province (project no. LY12E02010).

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Authors and Affiliations

  1. College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People’s Republic of China

    Ming-Wei Hong, Yi Zhao, Lai-Shun Qin, Cong-Yong Wang, Hong-Sheng Shi, Jia-Yu Guo, Xiao-Dong Tao, Kang-Ying Shu & Wen-Xiang Chai

  2. Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, People’s Republic of China

    Li Song

  3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People’s Republic of China

    Wen-Xiang Chai

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  1. Ming-Wei Hong
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  2. Li Song
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Correspondence to Wen-Xiang Chai.

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Hong, MW., Song, L., Zhao, Y. et al. Synthesis and Characterizations of Strongly Phosphorescent Copper(I) Halide Complexes with Bridged Bis[2-(diphenylphosphino)phenyl]ether Ligand. J Clust Sci 25, 1627–1640 (2014). https://doi.org/10.1007/s10876-014-0762-9

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  • DOI: https://doi.org/10.1007/s10876-014-0762-9

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