TY - JOUR
T1 - The mechanism of proton transfer between adjacent sites exposed to water
AU - Mezer, Aviv
AU - Friedman, Ran
AU - Noivirt, Orly
AU - Nachliel, Esther
AU - Gutman, Menachem
PY - 2005/6/9
Y1 - 2005/6/9
N2 - The mechanism of proton transfer between sites that are only a few angstroms apart, using as a model the proton exchange between sites on a small molecule, fluorescein, having two, spectrally distinguishable, proton-binding sites, was investigated. The dynamics of the proton transfer between the two proton-binding sites of the fluorescein indicated that the efficiency of the sites-to-site proton transfer is very sensitive to the presence of the screening electrolyte and has a very high kinetic isotope effect. The state of protonation at each site was constructed. The proton transfer between nearby sites, which were located on a rigid scaffolding, eploys a pathway that utilizes the ordered water in the first solvation layer as carrier.
AB - The mechanism of proton transfer between sites that are only a few angstroms apart, using as a model the proton exchange between sites on a small molecule, fluorescein, having two, spectrally distinguishable, proton-binding sites, was investigated. The dynamics of the proton transfer between the two proton-binding sites of the fluorescein indicated that the efficiency of the sites-to-site proton transfer is very sensitive to the presence of the screening electrolyte and has a very high kinetic isotope effect. The state of protonation at each site was constructed. The proton transfer between nearby sites, which were located on a rigid scaffolding, eploys a pathway that utilizes the ordered water in the first solvation layer as carrier.
UR - http://www.scopus.com/inward/record.url?scp=20744439101&partnerID=8YFLogxK
U2 - 10.1021/jp046213i
DO - 10.1021/jp046213i
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AN - SCOPUS:20744439101
SN - 1520-6106
VL - 109
SP - 11379
EP - 11388
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
IS - 22
ER -