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 language | English (US) |
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Pages (from-to) | 41-49 |
Number of pages | 9 |
Journal | Journal of Fluorescence |
Volume | 18 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2008 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Biochemistry
- Clinical Psychology
- Social Sciences (miscellaneous)
- Sociology and Political Science
- Spectroscopy
- Clinical Biochemistry
- Law