摘要
285 nm紫外激光照射下,用时间分辨电子自旋共振(TRESR)波谱仪研究了光解丙酮/1,2-丙二醇(ACETONE/PG)体系,得到了丙酮羰自由基(CH3)2.COH和1,2-丙二醇羰自由基CH3.COHCHOH的发射/吸收(E/A)型极化信号,这是一个自由基对(RPM)极化过程。在酸性环境中,溶剂分子的CIDEP谱明显减弱,(CH3)2.COH的CIDEP谱无明显变化,由此可判断光解ACETONE/PG体系是一个夺氢反应;在碱性环境中,(CH3)2.COH反应生成负离子基(CH3)2.CO-.
Photolysis of the ACETONE/PG solution by 285 nm laser was investigated with the time-resolved ESR spectrometer. The E/A patterns of CIDEP spectra of （CH3）2COH and CH3COHCHOH generated via RPM were clearly observed. In acid environment, the signal intensity of CH3COHCHOH decreased evidently, and it is concluded that the main photo induced process occurring in the ACETONE/PG system is hydrogen abstraction. In basic environment, （CH3）2COH was transformed into （CH3）2CO^-.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2007年第2期331-334,共4页
Journal of Atomic and Molecular Physics
基金
安徽省原子与分子物理重点学科基金
