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1 2007

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Hydratacja protonu w roztworze wodnym

Śmiechowski M., Stangret J.

Wiadomości Chemiczne

2007

[Z] 61, 1-2

99-116

The phenomena behind proton hydration in aqueous solution are still far from being fully understood and have attracted scientific attention for many decades now. This article reviews the current state of studies of this seemingly simple system, focusing particularly on the most popular techniques applied: computational chemistry, vibrational spectroscopy and diffraction methods. The picture of proton transfer via the Grotthuss mechanism, has lately been critically examined basing on up-to-date experimental and computational data, but it is still found relevant in biological systems, e.g. in proton-transferring proteins. The lengthy and heated debate on the identity of hydrated proton in an aqueous solution has focused for many years on two isomeric structures, the so-called "Eigen cation" and "Zundel cation". The findings of the last decade have proved that these two forms coexist in a dynamic equilibrium, and that the answer to this problem may as well be in the middle. The most recent reports from the last few years are reviewed here in considerable detail.