REINVESTIGATION OF SOLVENT CATALYZED GROUND-STATE REVERSE PROTON-TRANSFER IN 7-HYDROXYQUINOLINE

Citation
Pt. Chou et Ss. Martinez, REINVESTIGATION OF SOLVENT CATALYZED GROUND-STATE REVERSE PROTON-TRANSFER IN 7-HYDROXYQUINOLINE, Chemical physics letters, 235(5-6), 1995, pp. 463-470
Citations number
22
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
00092614
Volume
235
Issue
5-6
Year of publication
1995
Pages
463 - 470
Database
ISI
SICI code
0009-2614(1995)235:5-6<463:ROSCGR>2.0.ZU;2-5
Abstract
The dynamics of the ground-state reverse proton transfer of 7-hydroxyq uinoline have been reinvestigated in various alcohol solvents by pulse pump-cw probe transient absorption in combination with two-step laser -induced fluorescence measurements. The results show a nearly temperat ure-independent kinetic isotope effect for the reverse proton transfer in the ground state, consistent with the previous study. The overall proton transfer dynamics can be rationalized based on a kinetic deriva tion incorporating solvent reorganization forming a specific cyclic so lvent/solute complex, and then the dissociation and actual proton tran sfer of this hydrogen bonded complex.