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Synthesis and characterization of mono- and dinuclear copper(I) complexes with 3-(2-pyrimidinyl)-1,2,4-triazine

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Abstract

The mono- and dinuclear Cu(I) complexes [CuI(PPh3)(pmtz)] (1) and [{Cu(PPh3)2}2(μ-pmtz)](ClO4)2 (2), where pmtz is 3-(2-pyrimidinyl)-1,2,4-triazine, have been synthesized and characterized. Single-crystal X-ray diffraction analysis reveals that the pmtz acts as a bidentate ligand in complex 1, whereas in complex 2 the pmtz coordinates as a bis-bidentate chelate, assembling two identical {Cu(PPh3)2} moieties into a copper(I) dimer with a triple-decker sandwich structure involving phenyl/pmtz/phenyl π–π interactions. The UV–vis spectra of complexes 1 and 2 show low-energy absorptions at 350–550 nm, assigned to the Cu(I) to pmtz MLCT transition, probably mixed with some XLCT character for 1. The absorption of 2 is blue-shifted relative to that of 1 due to the substitution of the iodide of 1 with the π-acceptor ligand PPh3. Complexes 1 and 2 are non-emissive, both in solution and in the solid state, most likely owing to the electronic effects induced by the additional nitrogen donor of pmtz compared to 2,2′-bipyrimidine.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 21001057), the Natural Science Foundations of Jiangxi Province (No. 2009GQH0038) and Fujian Province (No. 2008F3117), the Science Foundation of Education Bureau of Jiangxi Province (No. GJJ10151), the Science Foundation of State Key Laboratory of Structural Chemistry (No. 20110015), and the start-up fund of Jiangxi University of Science and Technology (No. 09162).

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Authors and Affiliations

  1. School of Materials and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, People’s Republic of China

    Jing-Lin Chen, Bo Wu, Wei Gu, Xing-Fu Cao, He-Rui Wen, Ruijin Hong, Jinsheng Liao & Bo-Tao Su

  2. 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

    Jing-Lin Chen

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  1. Jing-Lin Chen
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Correspondence to Jing-Lin Chen.

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Chen, JL., Wu, B., Gu, W. et al. Synthesis and characterization of mono- and dinuclear copper(I) complexes with 3-(2-pyrimidinyl)-1,2,4-triazine. Transition Met Chem 36, 379–385 (2011). https://doi.org/10.1007/s11243-011-9480-4

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  • DOI: https://doi.org/10.1007/s11243-011-9480-4

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