Solvent Role of Ionic Liquids in Fundamental Chemical Reaction Dynamics Analyzed by Time‐resolved Spectroscopy
Solvent Role of Ionic Liquids in Fundamental Chemical Reaction Dynamics Analyzed by Time‐resolved Spectroscopy
复制标题
通过时间分辨光谱分析离子液体在基本化学反应动力学中的溶剂作用
DOI：
10.1002/tcr.202200242
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Kimura Yoshifumi
中科院分区：
文献类型：
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作者：
Fujii Kaori;Kimura Yoshifumi
离子液体（IL）用作化学反应的溶剂，由于其可设计性而不同于传统的有机溶剂。影响化学平衡和反应动力学的离子液体的物理化学参数，例如极性和粘度，可以通过改变阴离子和阳离子的组合或通过改变阳离子中存在的烷基链的长度来调节。我们有兴趣了解这些物理化学参数如何影响离子液体中的基本化学反应。因此，在这篇个人文章中，我们使用时间分辨光谱技术研究了我们最近在离子液体中两种不同光化学反应的工作，即羟基黄酮的激发态分子内质子转移和氨基二硫化物的光解离。有趣的是，IL 在这些化学反应中的作用截然不同。讨论了离子液体的阳离子种类（即头基和烷基碳数）对光激发和反应速率下溶剂化环境的影响。
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.