Pyrene-1-carboxylate in water and glycerol solutions: Origin of the change of pK upon excitation

Nathaniel V. Nucci, Bogumil Zelent, Jane M. Vanderkooi

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Pyrene-1-carboxy acid has a pK of 4 in the ground state, and a pK of 8 in the excited state. Fluorescence spectra of the acid and base forms are presented as a function of solvent and temperature. Ab initio quantum calculations indicate that the bond between the ring system and the carboxyl group has aromatic character that becomes stronger upon excitation. This stabilization helps to account for the increase in pK upon excitation.

Original languageEnglish (US)
Pages (from-to)41-49
Number of pages9
JournalJournal of Fluorescence
Volume18
Issue number1
DOIs
StatePublished - Jan 1 2008

All Science Journal Classification (ASJC) codes

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

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