Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, WB, India.
J Phys Chem B. 2012 Feb 2;116(4):1335-44. doi: 10.1021/jp2075995. Epub 2012 Jan 18.
The photoinduced electron transfer (PET) reaction has been investigated in a room temperature imidazolium ionic liquid (RTIL), 1-ethyl-3-methylimidazolium ethyl sulfate ([Emim][EtSO(4)]) and also in [Emim][EtSO(4)]-co-solvents mixtures from N,N-dimethyl aniline (DMA) to different Coumarin dyes using steady state and time-resolved fluorescence quenching measurements. We have used water and methanol and 2-propanol as the cosolvents of RTILs for the PET study. On going from neat ionic liquid to the RTIL-co-solvents mixtures the electron transfer rate has been largely enhanced. In neat RTIL as well as in [Emim][EtSO(4)]-co-solvents mixtures, a Marcus type of inversion in the PET rate have been observed.
我们研究了室温下离子液体 1-乙基-3-甲基咪唑硫酸乙酯([Emim][EtSO(4)])中的光诱导电子转移(PET)反应，以及 N,N-二甲基苯胺(DMA)到不同香豆素染料的电子转移速率，使用稳态和时间分辨荧光猝灭测量法，在[Emim][EtSO(4)]-共溶剂混合物中。我们将水和甲醇以及异丙醇用作 RTIL 的共溶剂进行 PET 研究。从纯离子液体到 RTIL-共溶剂混合物，电子转移速率大大提高。在纯 RTIL 以及[Emim][EtSO(4)]-共溶剂混合物中，观察到 PET 速率的马库斯类型反转。
