W
Wing Sum Chan
Researcher at University of Hong Kong
Publications - 10
Citations - 280
Wing Sum Chan is an academic researcher from University of Hong Kong. The author has contributed to research in topics: Resonance Raman spectroscopy & Raman spectroscopy. The author has an hindex of 8, co-authored 10 publications receiving 263 citations.
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Journal ArticleDOI
Ultrafast time-resolved study of photophysical processes involved in the photodeprotection of p-hydroxyphenacyl caged phototrigger compounds.
Chensheng Ma,Wai Ming Kwok,Wing Sum Chan,Peng Zuo,Jovi Tze Wai Kan,and Patrick H. Toy,David Lee Phillips +6 more
TL;DR: The results provide important evidence for elucidation of the initial steps for the pHP deprotection mechanism and indicates that the triplet is the reactive precursor for pHP photorelease reactions for the compounds examined in this study.
Journal ArticleDOI
Ultrafast time-resolved transient absorption and resonance raman spectroscopy study of the photodeprotection and rearrangement reactions of p-hydroxyphenacyl caged phosphates.
Chensheng Ma,Wai Ming Kwok,Wing Sum Chan,Yong Du,Jovi Tze Wai Kan,Patrick H. Toy,David Lee Phillips +6 more
TL;DR: The solvent effect observed in conjunction with the leaving group dependence of the triplet decay dynamics are consistent with a concerted solvent assisted triplet cleavage through a heterolytic mechanism for the HPDP and HPPP photodeprotection process.
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Time-resolved resonance Raman and density functional theory study of hydrogen-bonding effects on the triplet state of p-methoxyacetophenone.
TL;DR: Temporal evolution at early picosecond times indicates rapid ISC conversion, and subsequent relaxation of the excess energy of the initially formed energetic triplets occurs for both the free MAP and the hydrogen-bond complex.
Journal ArticleDOI
Time-resolved resonance Raman study of the triplet states of p-hydroxyacetophenone and the p-hydroxyphenacyl diethyl phosphate phototrigger compound.
Chensheng Ma,Peng Zuo,Wai Ming Kwok,Wing Sum Chan,Jovi Tze Wai Kan,and Patrick H. Toy,David Lee Phillips +6 more
TL;DR: The temporal evolution at very early picosecond time scale indicates there is rapid intersystem crossing (ISC) conversion and subsequent relaxation of the excess energy of the initially produced energetic triplet state.
Journal ArticleDOI
Time-resolved resonance Raman and density functional theory study of the deprotonation reaction of the triplet state of p-hydroxyacetophenone in water solution.
TL;DR: The possible implications of the model HA photochemistry in water solutions for the photodeprotection reactions of related p-HP phototrigger compounds in aqueous solutions are discussed.