Isotropic Raman study of ultrarapid proton-transfer reactions in aqueous mixtures

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Abstract
A theory is presented to study the exchange broadening of isotropic Raman bands due to ultrarapid proton-transfer reactions. It represents a generalization of standard theories of Raman band profiles of nonreactive liquids. The variables describing the reaction are assumed to represent a dichotomic Markovian process. The spectral behavior of various AH/H2O mixtures is studied as a function of the exchange rate and the interplay of various band shaping mechanisms is discussed in detail. Finally, the potentialities of the Raman spectroscopy as a tool to measure the rate constant are critically assessed.