Studies of fluorescent dyes: Part 2. An investigation of the synthesis and electronic spectral properties of substituted 3-(2'-benzimidazolyl)coumarins

Robert M. Christie, Chih Hung Lui

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)

Abstract

A series of 3-(2'-benzimidazolyl) coumarins containing a variety of substituents in the benzene ring of the coumarin system have been synthesized and their spectral properties investigated. The results of PPP molecular orbital calculations, using previously optimized parameters, were found to provide a reasonable account of the electronic absorption spectra for this series of dyes, except for some compounds which are likely to be non-planar as a result of steric congestion. The absorption and emission properties of the dyes are discussed in terms of their electronic structures.

Original languageEnglish
Pages (from-to)79-89
Number of pages11
JournalDyes and Pigments
Volume47
Issue number1-2
DOIs
Publication statusPublished - Oct 2000

Keywords

  • Coumarin
  • Electronic spectra
  • Fluorescence
  • PPP-MO calculations

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