Combined quenching mechanism of anthracene fluorescence by cetylpyridinium chloride in sodium dodecyl sulfate micelles

Angela R. Soemo, Jeanne E. Pemberton

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The Stern-Volmer quenching constant (KSV) for quenching of anthracene fluorescence in sodium dodecyl sulfate (SDS) micelles by pyridinium chloride has been reported previously to be 520 M-1 based on steady state fluorescence measurements. However, such measurements cannot distinguish static versus dynamic contributions to the overall quenching. In the work reported here, the quenching dynamics of anthracene in SDS micelles by cetylpyridinium chloride (CPC), an analogue of pyridinium chloride, were investigated using both steady state and time resolved fluorescence quenching. Concurrent measurement of the decrease in fluorescence intensity and lifetime of anthracene provide a quantitative evaluation of collision induced (i.e. dynamic) versus complex formation (i.e. static) quenching of the anthracene fluorophore. The results reveal that a combined quenching mechanism is operative with approximately equal constants of 249∈±∈6 M-1 and 225∈±∈12 M-1 for dynamic and static quenching, respectively.

Original languageEnglish (US)
Pages (from-to)295-299
Number of pages5
JournalJournal of Fluorescence
Volume24
Issue number2
DOIs
StatePublished - Jan 1 2014

Keywords

  • Alkylpyridinium chloride
  • Anthracene
  • SDS
  • Surfactant micelles
  • Time-resolved fluorescence quenching

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Psychology
  • Social Sciences (miscellaneous)
  • Sociology and Political Science
  • Spectroscopy
  • Clinical Biochemistry
  • Law

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