Isotope and temperature effects in ultrafast proton‐transfer from a strong excited‐state acid

E. Pines; D. Pines; T. Barak; Ben‐Zion Magnes; L. M. Tolbert; J. E. Haubrich

doi:10.1002/bbpc.19981020334

journal article Mar 01, 1998

Isotope and temperature effects in ultrafast proton‐transfer from a strong excited‐state acid

E. Pines D. Pines T. Barak Ben‐Zion Magnes L. M. Tolbert J. E. Haubrich

Berichte der Bunsengesellschaft für physikalische Chemie Vol. 102 No. 3 pp. 511-517 · Wiley

View at Publisher Save 10.1002/bbpc.19981020334

Abstract

AbstractThe introduction of naphthol derivatives that exhibit excited‐state acidities comparable to strong mineral acids, has opened the way for direct investigation of ultrafast proton‐transfer in aqueous solutions and alcohols. We report on the direct measurement of the isotope and temperature effects on 5‐cyano‐1‐naphthol excited‐state proton dissociation in the full composition range of water‐methanol mixtures. The results indicate that in pure water the proton‐transfer rate is almost activationless in the proton coordinate and is mainly controlled by the solvent. In pure methanol the reaction shows down considerably and is mainly controlled by activation along the proton coordinate.

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Details

Published: Mar 01, 1998
Vol/Issue: 102(3)
Pages: 511-517
License: View

Authors

Cite This Article

E. Pines, D. Pines, T. Barak, et al. (1998). Isotope and temperature effects in ultrafast proton‐transfer from a strong excited‐state acid. Berichte der Bunsengesellschaft für physikalische Chemie, 102(3), 511-517. https://doi.org/10.1002/bbpc.19981020334

Isotope and temperature effects in ultrafast proton‐transfer from a strong excited‐state acid

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