Details

Autor(en) / Beteiligte

• Catalán, Javier
• del Valle, Juan Carlos
• Kasha, Michael

Titel

Resolution of Concerted versus Sequential Mechanisms in Photo-Induced Double-Proton Transfer Reaction in 7-Azaindole H-Bonded Dimer

Ist Teil von

• Proceedings of the National Academy of Sciences - PNAS, 1999-07, Vol.96 (15), p.8338-8343

Ort / Verlag

United States: National Academy of Sciences of the United States of America

Erscheinungsjahr

1999

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• The experimental and theoretical bases for a synchronous or concerted double-proton transfer in centro-symmetric H-bonded electronically excited molecular dimers are presented. The prototype model is the 7-azaindole dimer. New research offers confirmation of a concerted mechanism for excited-state biprotonic transfer. Recent femtosecond photoionization and coulombic explosion techniques have given rise to time-of-flight MS observations suggesting sequential two-step biprotonic transfer for the same dimer. We interpret the overall species observed in the time-of-flight experiments as explicable without conflict with the concerted mechanism of proton transfer.