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<p>Green-emitting iridium (III) complexes were synthesised using chlorobridged dimer(ppy)<sub>2</sub>Ir<sub>2</sub>Cl<sub>2</sub>(ppy)<sub>2</sub>, 3-hydroxy-2-methyl-<i>γ</i>-pyranone,2-ethyl-3-hydroxy-4-pyranone, and 5-hydroxy-2-(hydroxymethyl)-1,4-pyranone as the auxiliary ligand. The structure of the target product was characterised by nuclear magnetic resonance spectroscopy(<sup>1</sup>H-NMR), infrared spectroscopy(IR) and mass spectrometry(MS), and its thermal stability, photophysical properties and electrochemical properties were investigated. The results show that the decomposition temperatures of Ir1, Ir2 and Ir3 are 3 49, 292 and 200 °C, respectively. The maximum emission wavelength of Ir1, Ir2 and Ir3 dissolved in dichloromethane is 491 nm. The HOMO energy level of Ir1, Ir2 and Ir3 are 5.39, −5.38, and −5.30 eV. The LUMO energy levels are −2.86, −2.85, and −2.80 eV, respectively.</p>

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Synthesis, Structure and Properties of Green-emitting Iridium (III) Complexes

  • 期刊论文

  • 发表日期：

    2025年5月17日

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  • Haipeng Xu,
  • Xiangguang Li,
  • Zhifeng Nie,
  • Lihang Yang,
  • Qiaowen Chang,
  • Caixian Yan,
  • Wen Jiang

摘要

Green-emitting iridium (III) complexes were synthesised using chlorobridged dimer(ppy)2Ir2Cl2(ppy)2, 3-hydroxy-2-methyl-γ-pyranone,2-ethyl-3-hydroxy-4-pyranone, and 5-hydroxy-2-(hydroxymethyl)-1,4-pyranone as the auxiliary ligand. The structure of the target product was characterised by nuclear magnetic resonance spectroscopy(1H-NMR), infrared spectroscopy(IR) and mass spectrometry(MS), and its thermal stability, photophysical properties and electrochemical properties were investigated. The results show that the decomposition temperatures of Ir1, Ir2 and Ir3 are 3 49, 292 and 200 °C, respectively. The maximum emission wavelength of Ir1, Ir2 and Ir3 dissolved in dichloromethane is 491 nm. The HOMO energy level of Ir1, Ir2 and Ir3 are 5.39, −5.38, and −5.30 eV. The LUMO energy levels are −2.86, −2.85, and −2.80 eV, respectively.