物理化学学报2011，Vol.27Issue(4)：971-976,6.
离子液体[bmim][BF4]对联苯甲酰光化学反应影响的瞬态吸收光谱
Transient Absorption Spectroscopy of the Effects of the Ionic Liquid [bmim][BF4] on the Photochemical Reactions of Benzil
摘要
Abstract
Using benzil (BZ) as a probe molecule, the photochemical properties of the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) and its binary mixed solutions with acetonitrile (MeCN) were investigated by nanosecond laser photolysis.We found that the decay of the triplet excited state of benzil (3BZ*) in a N2-saturated solution followed mono-exponential kinetics.Along with the increase in the volume fraction (VIL) of [bmim][BF4]in the mixed solvents, the absorption peak of 3BZ* did not change.However, the effect of different VIL values on the photoinduced electron transfer process in the mixture of [bmim][BF4]/MeCN was obvious.Moreover, the apparent rate constant (kgr) of the formed radical decreased obviously with an increase in VIL.When the ratio of [bmim][BF4]was sufficiently high, the electron transfer reaction between 3BZ* and triethylamine or N,N,N',N' -tetramethyl-p-phenylenediamine was retarded.关键词
室温离子液体/1-丁基-3-甲基咪唑四氟硼酸盐/联苯甲酰/激光光解/光诱导电子转移Key words
Room temperature ionic liquid/ 1-Butyl-3-methylimidazolium tetrafluoroborate/ Benzil/Laser photolysis/ Photoinduced electron transfer分类
化学化工引用本文复制引用
朱光来,吴国忠,崔执凤,许新胜..离子液体[bmim][BF4]对联苯甲酰光化学反应影响的瞬态吸收光谱[J].物理化学学报,2011,27(4):971-976,6.基金项目
国家自然科学基金(20673137,20903004),安徽高校省级自然科学研究重点项目(KJ2010A145)及安徽师范大学博士启动基金资助 （20673137,20903004）
