Magnetic FieldEffects on Photochemical Reaction in Ionic Liquids with Short Alkyl Chains
Magnetic FieldEffects on Photochemical Reaction in Ionic Liquids with Short Alkyl Chains
复制标题
磁场对短烷基链离子液体光化学反应的影响
DOI：
10.1021/jp207816t
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
M. Wakasa
中科院分区：
文献类型：
--
作者：
T. Yago;A. Hamasaki;M. Tanaka;T.Takamasu;M. Wakasa
利用纳秒激光闪光光解技术研究了磁场对短链烷基离子液体中苯硫酚与二苯甲酮和二苯硫酮光诱导夺氢反应的影响。在每种离子液体中，随着磁场强度的增加，二苯甲酮和硫代二苯甲酮自由基的逃逸自由基产率逐渐降低。观察到的结果进行了分析，使用随机刘维尔方程（SLE），采用溶剂分离的自由基对（SSRP）模型，其中SSRP具有特定的自由基-自由基距离是稳定的，并具有较长的寿命。SLE分析表明，SSRP的寿命和自由基旋转的SSRP状态的离子液体的宏观粘度强烈相关。
Magnetic field effects (MFEs) on the photoinduced hydrogen abstraction reactions of benzophenone and thiobenzophenone from thiophenol were investigated in several ionic liquids with short alkyl chains by a nanosecond laser flash photolysis technique. In each ionic liquid, escaped radical yields of benzophenone and thiobenzophenone ketyl radicals gradually decreased with increasing magnetic field strength. The observed results were analyzed by using the stochastic Liouville equation (SLE), employing a solvent separated radical pair (SSRP) model where the SSRP with a specific radical–radical distance is stable and has a long lifetime. The SLE analysis revealed that the lifetime of the SSRP and the radical rotation in the SSRP states are strongly correlated with the macroviscosity of the ionic liquids.