- Femtosecond laser selective intramolecular double proton transfer in [2,2'-bipyridyl]-3,3'-diol
- Chemical Physics Letters
- Volume | Issue number
- 289 | 5-6
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Van 't Hoff Institute for Molecular Sciences (HIMS)
We report an excitation energy dependence of the dynamics of the excited-state intramolecular double-proton transfer of [2,2'-bipyridyl]-3,3'-diol in liquid solution. By means of femtosecond fluorescence upconversion experiments it is shown that an increase of the vibrational energy in the excited electronic S-1 state results in an increase of the ratio of the reaction yields of the monoketo and diketo tautomeric products. The dominance of the concerted double-proton transfer process at the lower excitation energies is evidence for an energy barrier in the dienol-monoketo reaction pathway.
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