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A Theoretical Study of the Mechanism of the Water Catalyzed HCl Elimination Reactions of CHXCl（OH）（X=H,Cl） and HClCO in the Gas Phase and in Aqueous Solution

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A Theoretical Study of the Mechanism of the Water Catalyzed ...

中国化学会第九届全国量子化学学术会议

作者： david lee phillips The Department of Chemistry University of Hong Kong Hong Kong

＜正＞A systematic ab initio investigation of the reactions of chloromethanol, dichloromethanol and formyl chloride with water was presented in which water molecules （up to 6） were explicitly included in the reaction system. The decomposition reactions of the chlorinated methanols and formyl chloride were found to be significantly catalyzed by water molecules with the decomposition becoming faster as the number of water molecules increases. Predicted rate constants for the

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Study on the “meta-Effect” Photochemical Reactions of Selected Benzophenone and Anthraquinone Compounds

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Study on the “meta-Effect” Photochemical Reactions of Sele...

中国化学会第十二届全国物理有机化学学术会议

作者：马佳妮 david lee phillips 西北大学化学与材料科学学院香港大学化学系

Benzophenone(BP)and anthraquinone(AQ)derivatives have been studied under a variety of *** hydrogen abstraction reaction and electron transfer are commonly observed.A new kind of reaction only occurs for meta-substitut...

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To Photoredox or Not in Neutral Aqueous Solutions for Selected Benzophenone and Anthraquinone Derivatives

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To Photoredox or Not in Neutral Aqueous Solutions for Select...

第十五届全国化学动力学会议

作者：张喜庭 Jiani Ma david lee phillips Department of Chemistry The University of Hong Kong Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education College of Chemistry and Materials ScienceNorthwest University

＜正＞The experimental and theoretical results in neutral aqueous solutions reported here indicate that a proton-coupled electron transfer（PCET）from an alcohol C-H bond to the para-carbonyl is the initial and crucial process for the photoredox reaction of 2-（1-hydroxyethyl）-anthraquinone（HEAQ）to occur while the counterpart3-（hydroxymethyl）-benzophenone（3-BPOH）compound displays a different PCET from an alcohol O-H bond to

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Time-Resolved Spectroscopy Studies of P-Hydroxyphenacyl Caged Phototrigger Compounds

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Time-Resolved Spectroscopy Studies of P-Hydroxyphenacyl Cage...

第九届全国化学动力学会议

作者： david lee phillips Wai Ming Kwok Wing Sum Chan Department of Chemistry The University of Hong KongPokfulam Road Hong Kong S.A.R.P.R.China Department of Chemistry The University of Hong KongPokfulam RoadHong Kong S.A.R.P.R.China Department of Chemistry The University of Hong KongPokfulam Road Hong Kong S.A.R.P.R.China

＜正＞The need for fast and localized release of biological stimulants for real-time monitoring of physiological responses in biological systems has driven the search for efficient phototrigger compounds. The p-hydroxyphenacyl （pHP） caged class of phototrigger compounds was found to have a favorable photodeprotection reaction in

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同位二碘甲烷与环己烯基反应的时间分辨共振拉曼及密度函数理论研究(英文)

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光散射学报 2005年第3期17卷 263-264页

作者： david lee phillips Department of chemistry The University of Hong Kong P. R. China

A combined time-resolved resonance Raman （TR3） spectroscopy experimental and density functional theoretical study of the ultraviolet photolysis of diiodomethane in cyclohexane and cyclohexen solvent was done. The transient resonance Raman experiments identified the CH2I-I is the photoproduct that is mainly responsible for the ～385 absorption formed following ultraviolet excitation of diiodomethane in liquid solutions （Figure 1）. While the picosecond time-resolved resonance Raman experimental results show that CH2I-I is formed vibratiobally hot within a few picoseconds following solvent induced geminate recombination of the initially produced CH2I radical and I fragments formed from photodisociation of the parent diiodomethane molecule （Figure 2）.

关键词：同位二碘甲烷环己烯基时间分辨共振拉曼函数密度函数光谱学

Competition between "Meta Effect" Photochemical Reactions of Selected Benzophenone Compounds Having Two Different Substituents at Meta Positions

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Competition between "Meta Effect" Photochemical Reactions of...

第十五届全国化学动力学会议

作者：马佳妮张喜庭李明德 david lee phillips 西北大学化学与材料科学学院香港大学化学系

＜正＞Recent studies conducted on some"meta effect"photochemical reactions focused on aromatic carbonyls having a substitution on one meta position of the benzophenone（BP）and anthraquinone parent *** this paper,two different substitutions were introduced with one at each meta position of the BP parent compound to investigate

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Time-resolved Rresonance Raman Study of Hydroxyphenacyl Compounds

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Time-resolved Rresonance Raman Study of Hydroxyphenacyl Comp...

第十三届全国光散射学术会议

作者： david lee phillips Chensheng Ma Wai Ming Kwok Wing Sum Chan Peng Zou The University of Hong Kong Department of Chemistry The University of Hong Kong

＜正＞Real-time monitoring of physiological responses in biological systems needs compounds called phototriggers that release the biological stimulant in a very fast and localized *** need for the fast and localized release of biological stimulants has driven the design and development of efficient phototngger *** p-hydroxyphenacyl（pHP）caged class of phototriggers was recently observed to undergo a

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甲基卤化物的脱卤研究以及在盐溶液（NaCl）环境中通过紫外光分解CH2I2制备强酸（英文）

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光散射学报 2005年第3期 73-74页

作者： WaiMing Kwok,david lee phillips Department of Chemistry University of Hong Kong Hong Kong P. R. China Department of Chemistry University of Hong Kong Hong Kong P. R. China

The ultraviolet photolysis of CH2I2was studied in water [1-3] and salt water solutions using photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both types environments produces mainly CH2（OH）2and HI products. However, photolysis of CH2I2in salt water leads to formation of new products/intermediates （CH2ICl and Cl2-） not observed in the absence of salt in aqueous solutions. The amount of CH2（OH）2and HI products appears to decrease after photolysis of CH2I2in salt water compared to pure water.

关键词： CH2I2 NaCl TR

甲基卤化物的脱卤研究以及在盐溶液(NaCl)环境中通过紫外光分解CH_2I_2制备强酸(英文)

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光散射学报 2005年第3期17卷 261-262页

作者： WaiMing Kwok david lee phillips Department of Chemistry University of Hong Kong Hong Kong P. R. ChinaDepartment of Chemistry University of Hong Kong Hong Kong P. R. China

The ultraviolet photolysis of CH2I2 was studied in water [1-3] and salt water solutions using photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both types environments produces mainly CH2（OH）2 and HI products. However, photolysis of CH2I2 in salt water leads to formation of new products/intermediates （CH2ICl and Cl2-） not observed in the absence of salt in aqueous solutions. The amount of CH2（OH）2 and HI products appears to decrease after photolysis of CH2I2 in salt water compared to pure water.

关键词：甲基卤化物脱卤反应 NaCl盐溶液紫外光分解强酸