Photolysis of benzophenone with two-step two-laser excitation  

作　　者：CAI Xichen HAN Zhenhui , YAO Side& LIN NianyunLaboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China 

出　　处：《Science China Chemistry》2001年第6期582-586,共5页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 20073059).

摘　　要：The first laser excites a molecule to a lower triplet state and another sequential laser excites it resonantly to higher triplet states or makes it ionization. This two-step two-laser method provides a novel way to study the electron transfer or charge transfer of excited molecules. The higher excited benzophenone and its radical cation can be observed under the time-resolved absorption method when it was excited to lower triplet state by one laser and another one exciting it to higher triplet states resonantly. The higher excited benzophenone molecules undergoing inter-molecular hydrogen abstraction with iso-propylalcohol molecules are faster than the lower ones.The first laser excites a molecule to a lower triplet state and another sequential laser excites it resonantly to higher triplet states or makes it ionization. This two-step two-laser method provides a novel way to study the electron transfer or charge transfer of excited molecules. The higher excited benzophenone and its radical cation can be observed under the time-resolved absorption method when it was excited to lower triplet state by one laser and another one exciting it to higher triplet states resonantly. The higher excited benzophenone molecules undergoing intermolecular hydrogen abstraction with iso-propylalcohol molecules are faster than the lower ones.

关 键 词：two-laser photolysis upper triplet states BENZOPHENONE 

分 类 号：O644[理学—物理化学]