Reaction Mechanism for Direct Proton Transfer from Carbonic Acid to a Strong Base in Aqueous Solution I: Acid and Base Coordinate and Charge Dynamics
نویسندگان
چکیده
منابع مشابه
Aqueous bimolecular proton transfer in acid–base neutralization
We report on a comparative femtosecond infrared study of the bimolecular proton transfer reaction dynamics of the photoacid pyranine (8-hydroxy-1,3,6-trisulfonate-pyrene, abbreviated as HPTS) with the family of carboxylate bases OOCCH(3 x)Clx (x = 0–3) in aqueous solution. We use a generalized reaction model consisting of n proton transfer reaction pathways between photoacid and base, each path...
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We study the mechanism of proton transfer (PT) between the photoacid 8-hydroxy-1,3, 6-pyrenetrisulfonic acid (HPTS) and the base chloroacetate in aqueous solution. We investigate both proton and deuteron transfer reactions in solutions with base concentrations ranging from 0.25 M to 4 M. Using femtosecond midinfrared spectroscopy, we probe the vibrational responses of HPTS, its conjugate photob...
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Detailed molecular dynamics simulations of an acid-base reaction have been the subject of extensive investigations. Here we report the excited state proton transfer dynamics of pyranine (8-hydroxypyrene-1,3,6-trisulfonic acid, HPTS) in acetate buffer by time-resolved fluorescence (TF) and quantum mechanical/effective fragment potential molecular dynamics (QM/EFP-MD) simulations. High time resol...
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Carbonic anhydrase (CA) is the zinc metalloenzyme that catalyses the reversible reactions of CO(2) with water. CA plays a crucial role in systemic acid-base regulation in fish by providing acid-base equivalents for exchange with the environment. Unlike air-breathing vertebrates, which frequently utilize alterations of breathing (respiratory compensation) to regulate acid-base status, acid-base ...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2016
ISSN: 1520-6106,1520-5207
DOI: 10.1021/acs.jpcb.5b12742