Wavelength dependent mechanism of phenolate photooxidation in aqueous solution.
Wavelength dependent mechanism of phenolate photooxidation in aqueous solution.
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DOI:
10.1039/d3sc00016h
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发表时间:
2023-03-22
期刊:
影响因子:
8.4
通讯作者:
中科院分区:
文献类型:
--
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Phenolate photooxidation is integral to a range of biological processes, yet the mechanism of electron ejection has been disputed. Here, we combine femtosecond transient absorption spectroscopy, liquid-microjet photoelectron spectroscopy and high-level quantum chemistry calculations to investigate the photooxidation dynamics of aqueous phenolate following excitation at a range of wavelengths, from the onset of the S0–S1 absorption band to the peak of the S0–S2 band. We find that for λ ≥ 266 nm, electron ejection occurs from the S1 state into the continuum associated with the contact pair in which the PhO˙ radical is in its ground electronic state. In contrast, we find that for λ ≤ 257 nm, electron ejection also occurs into continua associated with contact pairs containing electronically excited PhO˙ radicals and that these contact pairs have faster recombination times than those containing PhO˙ radicals in their ground electronic state. Phenolate photooxidation is integral to a range of biological processes, yet the mechanism of electron ejection has been disputed.
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影响因子:
8.4
作者:
Bochenkova AV;Mooney CRS;Parkes MA;Woodhouse JL;Zhang L;Lewin R;Ward JM;Hailes HC;Andersen LH;Fielding HH
通讯作者:
Fielding HH
影响因子:
5.7
作者:
Scholz, Michael S.;Fortune, William G.;Tau, Omri;Fielding, Helen H.
通讯作者:
Fielding, Helen H.
影响因子:
3.3
作者:
Reuter, N;Lin, H;Thiel, W
通讯作者:
Thiel, W
影响因子:
4.4
作者:
JORGENSEN, WL;CHANDRASEKHAR, J;KLEIN, ML
通讯作者:
KLEIN, ML
DOI:
10.1073/pnas.81.22.7083
发表时间:
1984-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
HANAMOTO, JH;DUPUIS, P;ELSAYED, MA
通讯作者:
ELSAYED, MA