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<p>Two novel polynuclear copper-based complexes, [(CH<sub>3</sub>)<sub>2</sub>NH<sub>2</sub>]<sub>2</sub>[Cu(II)<sub>2</sub>Cu(I)<sub>2</sub>(L<sup>1</sup>)<sub>4</sub>Bpy]·2H<sub>2</sub>O (<b>Complex-1</b>) and [Cu<sub>2</sub>(L<sup>2</sup>)<sub>2</sub>(im)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>] (<b>Complex-2</b>), were synthesized . (H<sub>2</sub>L<sup>1</sup>: 4-chloro-5-(4-methylphenyl)-1<i>H</i>-pyrazole-3-carboxylic acid; H<sub>2</sub>L<sup>2</sup>: 4-chloro-1<i>H</i>-pyrazole-3-carboxylic acid; Bpy: 4,4′-bipyridine; im: imidazole). The structures of the complexes were characterized by infrared absorption, X-ray powder diffraction, and single-crystal X-ray diffraction, with their thermal stability and Electrochemiluminescence (ECL) properties investigated. In <b>Complex-1</b>, Cu(I) and Cu(II) adopt planar trigonal and planar tetragonal coordination geometries, respectively, while Cu(II) in <b>Complex-2</b> exhibits a slightly distorted trigonal pyramidal coordination geometry. Both complexes demonstrated good thermal stability below 260 °C. <b>Complex-1</b> exhibited superior Electrochemiluminescence (ECL) performance, maintaining a maximum ECL intensity of 1447.20 a.u. even after removal of potential singlet oxygen interference.</p>

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Two novel polynuclear copper complexes: electrochemiluminescence from synthesis to performance exploration

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Dao-Hang Du,
  • Chao Feng,
  • Shi-Hong Zhu,
  • Yun-Hua Jiang,
  • Jia Yang,
  • Ting Tao,
  • Shu-Li Yu,
  • Hong Zhao,
  • Guo-Ning Zhang,
  • Yu-Cheng Wang

摘要

Two novel polynuclear copper-based complexes, [(CH3)2NH2]2[Cu(II)2Cu(I)2(L1)4Bpy]·2H2O (Complex-1) and [Cu2(L2)2(im)2(H2O)2] (Complex-2), were synthesized . (H2L1: 4-chloro-5-(4-methylphenyl)-1H-pyrazole-3-carboxylic acid; H2L2: 4-chloro-1H-pyrazole-3-carboxylic acid; Bpy: 4,4′-bipyridine; im: imidazole). The structures of the complexes were characterized by infrared absorption, X-ray powder diffraction, and single-crystal X-ray diffraction, with their thermal stability and Electrochemiluminescence (ECL) properties investigated. In Complex-1, Cu(I) and Cu(II) adopt planar trigonal and planar tetragonal coordination geometries, respectively, while Cu(II) in Complex-2 exhibits a slightly distorted trigonal pyramidal coordination geometry. Both complexes demonstrated good thermal stability below 260 °C. Complex-1 exhibited superior Electrochemiluminescence (ECL) performance, maintaining a maximum ECL intensity of 1447.20 a.u. even after removal of potential singlet oxygen interference.