【作者】 朱光来； 张良伟； 王玉； 康贤取；

【Author】 Guanglai Zhu;Liangwei Zhang;Yu Wang;Xianqu Kang;Institute of Atomic and Molecular Physics, Anhui Normal University;

【机构】 安徽师范大学原子与分子物理研究所；

【摘要】 离子液体具有不易挥发、液态范围宽、电导率高等特点,是一种潜在的新型绿色溶剂^[1]。瞬态吸收光谱和时间分辨荧光等瞬态光谱技术应用于离子液体体系中的化学反应动力学研究,有助于揭示一些典型离子液体的溶剂特性。我们以355 nm激光为光源,系统研究了杜醌、萘醌、蒽醌及其衍生物等光敏探针分子在吡啶离子液体（[BPy][BF₄]、[BPy][TNf₂]）与分子溶剂（MeCN、H₂O等）混合体系中的光化学反应行为^[2],比较了类型不同的吡啶离子液体对光诱导电子转移反应动力学的影响。同时还观测了离子液体对光敏分子的稳态吸收和荧光光谱的影响^[3],采用分子动力学模拟方法研究了离子液体的微观结构和动力学特性^[4]。与咪唑离子液体比较^[5],吡啶离子液体更有利于光诱导电子转移的发生;由时间相关函数等分析可知,离子液体对光诱导电子转移的影响与体系的局部结构和溶质/溶剂相互作用密切相关。更多还原

【Abstract】 Ionic liquids(ILs) have some unique properties, such as low vapor pressure, wide liquid temperature range, and high ionic conductivity. As potential green solvents, ILs could be used as suitable mediums for some representative photochemical reactions. By time-resolved spectroscopy techniques including the transient absorption spectra, it has been investigated that the photoinduced electron transfer(PET) reaction occurred between the donors and the acceptors such as duroquinone, naphthoquinone, anthraquinone in the mixtures of pyridinium ionic liquids and molecular solvents. In addition, steady state absorption and fluorescence spectra of some probes have been explored in a few ionic liquids. We also explored the microstructure and dynamic properties of pyridinium ionic liquids by molecular simulation methods. The effects of ILs on PET are related to the local microstructures of systems and the interactions between solute and solvent molecules.更多还原