Luminescent bis-alkynylgold(III) complexes with bidentate cyclometalating ligands: A comparison study with related tridentate cyclometalated complexes

Ka Man Vonika AU, Vivian Wing-Wah YAM

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1 Citation (Scopus)

Abstract

Background: There has been a continuous interest in the development of luminescent gold(III) complexes as emitters for OLED applications in recent years. 

Objective: To design and synthesize a series of luminescent bis-alkynylgold(III) complexes with bidentate C^N-type ligands and to compare their properties with related tridentate cyclometalated complexes. 

Methods: A series of bis-alkynylgold(III) complexes with bidentate C^N-type ligands derived from 2-phenylpyridine and 7,8-benzoquinoline has been designed and synthesized. The photophysical properties of the complexes have been studied by electronic absorption and emission spectroscopies. 

Results: All of the complexes were observed to exhibit rich photophysical and electrochemical properties. In particular, the complexes were strongly emissive at ambient conditions, showing vibronic-structured emission bands peaked at 433–557 nm in dichloromethane solutions at 298 K. 

Conclusions: By comparing the structural features, luminescence properties and electrochemistry of the bidentate complexes with related tridentate C^N^C and C^N^N-type alkynylgold(III) complexes, a better understanding on the structure-property relationship of the alkynylgold(III) system has been obtained. Copyright © 2023 Chemical Society Located in Taipei and Wiley-VCH GmbH.

Original languageEnglish
Pages (from-to)1237-1251
JournalJournal of the Chinese Chemical Society
Volume70
Issue number5
DOIs
Publication statusPublished - May 2023

Citation

Au, V. K.-M., & Yam, V. W.-W. (2023). Luminescent bis-alkynylgold(III) complexes with bidentate cyclometalating ligands: A comparison study with related tridentate cyclometalated complexes. Journal of the Chinese Chemical Society, 70(5), 1237-1251. https://doi.org/10.1002/jccs.202300089

Keywords

  • Alkynyl
  • Cyclometalating ligand
  • Gold(III)
  • Luminescence

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