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Excited State Proton Transfer in a ‘Super’ Photoacid Based on a Phenol–pyridinium Biaryl Chromophore by J.-Pierre Malval; Vincent Diemer; Fabrice Morlet Savary; Patrice Jacques; Xavier Allonas; Hélène Chaumeil; Albert Defoin; Christiane Carré is a Physics and Astronomy article available to read on EtoBox.
What is Excited State Proton Transfer in a ‘Super’ Photoacid Based on a Phenol–pyridinium Biaryl Chromophore about?
We report the effect of a N-methylpyridinium substituent on the photoacidity enhancement of a phenol derivative. The steady-state and time-resolved fluorescence of this new phenolic 'super' photoacid (HPPy) are measured in different solvents in comparison with its methoxy analogue (MPPy). Solvatochromic shifts and nonradiative rate constants ascribable to excited state proton transfer (ESPT) are correlated with the empirical Kamlet-Taft parameters (p\*, a, and b). Whereas, spectral shift of MPPy is mainly correlated to p\* parameter, HPPy is also strongly influenced by b. At 77 K, ESPT is hampered and leads to the switch 'on' emission of conjugated base.
Who reads Excited State Proton Transfer in a ‘Super’ Photoacid Based on a Phenol–pyridinium Biaryl Chromophore?
It is typically read by researchers, students, and practitioners in Physics and Astronomy.
- Author
- J.-Pierre Malval; Vincent Diemer; Fabrice Morlet Savary; Patrice Jacques; Xavier Allonas; Hélène Chaumeil; Albert Defoin; Christiane Carré
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)
- Published
- 2008
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)