Synthesis, crystal structure and photophysical study of luminescent three-coordinate cuprous bromide complexes based on pyrazole derivatives

Fengshou Wu, Hongbo Tong, Kai Wang*, Xiulan Zhang, Jie Zhang, Rick W K WONG, Xunjin ZHU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The 1: 2 M-ratio reaction between cuprous bromide and pyrazole derivatives in toluene results in mononuclear Cu(I) complexes [CuBr(pyrazole)2]. The complexes have been characterized by 1H NMR spectroscopy and elemental analysis. The molecular structure, established by single-crystal X-ray diffraction, features a trigonal planar geometry around copper, with monodentate pyrazole derivatives. All the Cu(I) complexes are luminescent in the solid state at ambient temperature. Intense blue or blue-green emission in the solid state is observed for these complexes, with the maxima ranging from 431 to 493 nm. The observed photoluminescence could be ascribed to the metal-to-ligand charge-transfer excited states, probably mixed with some halide-to-ligand character. The microsecond lifetime scale of the complexes implies that these transitions arise from the triplet excited states.

Original languageEnglish
Pages (from-to)926-933
Number of pages8
JournalJournal of Coordination Chemistry
Volume69
Issue number6
DOIs
Publication statusPublished - 18 Mar 2016

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry

User-Defined Keywords

  • crystal structures
  • Cuprous bromide
  • luminescence
  • three coordinate

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