化学
离子液体
溶剂化
分子内力
化学反应
光激发
光化学
烷基
溶剂
溶剂效应
光谱学
光解
离子键合
反应动力学
计算化学
激发态
化学物理
有机化学
分子
离子
催化作用
物理
量子力学
核物理学
作者
Kaori Fujii,Yoshifumi Kimura
标识
DOI:10.1002/tcr.202200242
摘要
Ionic liquids (ILs), which are used as solvents for chemical reactions, are different from conventional organic solvents owing to their designability. Physicochemical parameters of the ILs, such as polarity and viscosity, that affect chemical equilibria and reaction kinetics can be tuned by changing the combination of anions and cations or by varying the lengths of the alkyl chains present in the cations. We were interested in knowing how these physicochemical parameters affect fundamental chemical reactions in ILs. Therefore, in this personal account, we investigate our recent work on two different photochemical reactions in ILs, namely excited-state intramolecular proton transfer of hydroxyflavone and photodissociation of aminodisulfide, using time-resolved spectroscopic techniques. Interestingly, the roles of the ILs in these chemical reactions are quite different. The effect of the cationic species of the ILs (i. e., the head groups and number of alkyl carbons) on the solvation environment upon photoexcitation and reaction rate are discussed.
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