Heteroleptic copper(I) photosensitizers with carbazole-substituted phenanthroline ligands: Synthesis, photophysical properties and application to photocatalytic H2 generation

Zhe Jian Yu, Hao Chen, Alastair J.J. Lennox, Li Juan Yan, Xue Fen Liu, Dan Dan Xu, Feng Chen, Liang Xuan Xu, Yang Li, Qing An Wu, Shu Ping Luo*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)
162 Downloads (Pure)

Abstract

A series of novel 4,7-dicarbazol-1,10-phenanthroline bidentate N-ligands have been designed and synthesized, and applied in heteroleptic copper complexes [Cu(PˆP)(NˆN)]+ as photosensitizers (PS) for light-driven water reduction. In combination with a water reduction catalyst (WRC), Fe3CO12, photocatalytic performances up to 1036 turnover numbers (TON) were reached. This excellent performance can be attributed to the introduction of carbazole groups to the phenanthroline backbone, which can increase the fluorescence quantum yield, decrease the reduction potential of the copper complexes and switch the excited state quenching mechanism from reductive to oxidative. By means of DFT calculations, it has been established that the carbazole substituent contributes most significantly to the HOMO of these complexes.

Original languageEnglish
Pages (from-to)771-775
Number of pages5
JournalDyes and Pigments
Volume162
Early online date11 Nov 2018
DOIs
Publication statusPublished - Mar 2019

Keywords

  • Hydrogen production
  • Photosensitizers
  • Water reduction

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