Luminescence of 5-phenyltetrazole and its Derivatives. Part I. Absorption and Fluorescence Spectra

I. Gryczyński, A. Kawski, A. Rayńska, Z. Grzonka

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Absorption and fluorence spectra of a series of 5-phenyltetrazole derivatives have been measured. Compounds carrying electron-accepting CN or COOH groups in the phenyl ring exhibit dual fluorescence. Investigations carried out in acid and basic media and a comparison of the fluorescence of p-cyano-5-phenyltetrazole and l-methyl-5-(4'-cyano) phenyltetrazole show the anions of respective 5-phenyl-tetrazole derivatives to be responsible for the long-wave fluorescence (λmax ≈ 400 nm). The long-wave fluorescence of some 5-phenyltetrazole derivatives is associated with a considerable charge delocalization between the tetrazole and phenyl rings, this being accompanied by mutual twisting of the rings in the excited state. This finding has been confirmed by the absence of the long-wave fluorescence in rigid media.

Original languageEnglish
Pages (from-to)1259-1261
Number of pages3
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume37
Issue number11
DOIs
StatePublished - 1 Nov 1982

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