Ground- and Excited-State Tautomerism in 2-(3'-Hydroxy-2'-pyridyl)benzimidazole

Ground- and Excited-State Tautomerism in 2-(3'-Hydroxy-2'-pyridyl)benzimidazole

Ground-state HPyBI is determined to have keto-enol equilibrium in water, and the enol form predominates in nonaqueous solutions. The keto form is the only excited form in all the solvents considered. Ultrafast intramolecular proton transfer creates the enol form from the keto form. 47 refs., 6 figs....

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Veröffentlicht in:Journal of Physical Chemistry 1994-09, Vol.98 (35), p.8666-8672
Hauptverfasser: Rodriguez Prieto, Flor, Rios Rodriguez, M. Carmen, Mosquera Gonzalez, M, Rios Fernandez, Miguel A
Format: Artikel
Sprache:eng
Schlagworte:
40 CHEMISTRY
ABSORPTION SPECTROSCOPY
BENZIMIDAZOLES
EXCITED STATES
FLUORESCENCE SPECTROSCOPY
GROUND STATES
ISOMERIZATION
MATERIALS SCIENCE
PHOTOCHEMICAL REACTIONS
PHYSICS
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Zusammenfassung:Ground-state HPyBI is determined to have keto-enol equilibrium in water, and the enol form predominates in nonaqueous solutions. The keto form is the only excited form in all the solvents considered. Ultrafast intramolecular proton transfer creates the enol form from the keto form. 47 refs., 6 figs., 3 tabs.
ISSN:0022-3654
1541-5740
DOI:10.1021/j100086a014