Direct observation of a hydrogen-bonded charge-transfer state of 4-dimethylaminobenzonitrile in methanol by time-resolved IR spectroscopy

Wai Ming Kwok, Michael W. George, David C. Grills, Chensheng Ma, Pavel Matousek, Anthony W. Parker, David Phillips, William T. Toner, Michael Towrie

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Abstract

Anomalies in the fluorescence spectra of dual fluorescence molecules explained? A comparison of the time-resolved I R absorption of the C≡N band of photoexcited 4-dimethylaminobenzonitrile in MeCN and MeOH provides the first direct observation of the formation of a hydrogen-bonded intramolecular charge-transfer (ICT) state in MeOH and its coexistence with a "free" ICT state (see picture). The so-called dual fluorescence will be triple, not dual.

Original languageEnglish
Pages (from-to)1826-1830
Number of pages5
JournalAngewandte Chemie - International Edition
Volume42
Issue number16
DOIs
Publication statusPublished - Apr 25 2003

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Keywords

  • Charge transfer
  • Cyanides
  • Fluorescence
  • Hydrogen bonds
  • IR spectroscopy
  • Time-resolved spectroscopy

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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