Photochemical Reaction of Benzoin Caged Compound： Time-Resolved Fourier Transform Infrared Spectroscopy Study  

安息香笼化合物光化学反应的时间分辨红外光谱

作　　者：代小娟[1] 余友清[1] 刘坤辉[2] 苏红梅[1,2] 

机构地区：[1]中国科学院化学研究所,北京分子科学国家实验室筹,北京100190 [2]北京师范大学化学学院,北京100875

出　　处：《Chinese Journal of Chemical Physics》2016年第1期91-98,I0002,共9页化学物理学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China （No.21333012 and No.21425313） and the National Basic Research Program of China （No.2013CB834602）.

摘　　要：The benzoin group caged compound has received strong interests due to its excellent photo- deprotection properties and wide use in chemical and biological studies. We used timeresolved infrared spectroscopy to investigate the photochemical reaction of the benzoin caged compound, o-（2-methylbenzoyl）-DL-benzoin under 266 nm laser irradiation. Taking advantage of the specific vibrational marker bands and the IR discerning capability, we have detected and identified the uncaging product 2-methylbenzoic acid, and two intermediate radicals of benzoyl and 2-methylbenzoate benzyl in the transient infrared spectra. Our results provide spectral evidence to support the homolytic cleavage reaction of C-C=O bond in competition with the deprotection reaction. Moreover, the product yields of 2-methylbenzoic acid and benzoyl radical were observed to be affected by solvents and a largely water contalning solvent can be in favor of the deprotection reaction.

关 键 词：BENZOIN Caged compound Photo-deprotection Time-resolved infrared spectroscopy 

分 类 号：O[理学]