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• W2000596718 abstract "Abstract Nanosecond time‐resolved resonance Raman (ns‐TR 3 ) spectroscopy was employed to investigate the triplet state of para ‐hydroxybenzophenone ( p ‐hBP) in pure acetonitrile (MeCN) and its subsequent deprotonation reaction in a H 2 O/MeCN mixed solution. The TR 3 results reveal that the deprotonation reaction occurred with the p ‐hBP triplet state as the precursor species after 266 nm photolysis of p ‐hBP in a H 2 O/MeCN mixed solution. The ground‐state p ‐hBP anion species was observed to form about 20 ns after excitation in a 5% H 2 O/95% MeCN mixed solvent. Density functional theory (DFT) calculations were done to help obtain information about the structures and vibrational modes of the triplet p ‐hBP and p ‐hBP anion species. A reaction scheme is proposed for the photoreaction pathways of p ‐hBP in pure MeCN and H 2 O/MeCN mixed solvents. Comparison of the results here for p ‐hBP to the related para ‐hydroxyacetophenone (HA) system indicates that substitution of the methyl group in HA with a phenyl group to form p ‐hBP significantly alters the chemical reactivity of the triplet state so that both deprotonation and intersystem crossing (ISC) for the triplet state occur much faster in p ‐hBP than in HA. Copyright © 2008 John Wiley & Sons, Ltd." @default.
• W2000596718 created "2016-06-24" @default.
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• W2000596718 date "2008-04-18" @default.
• W2000596718 modified "2023-10-11" @default.
• W2000596718 title "Time‐resolved resonance Raman and density functional theory study of the deprotonation reaction of the triplet state of <i>para</i>‐hydroxybenzophenone in mixed acetonitrile/water solutions" @default.
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• W2000596718 doi "https://doi.org/10.1002/jrs.1997" @default.
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