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离子液体作为绿色溶剂和催化剂在有机合成和催化反应中具有重要作用.酸性离子液体因同时拥有液体酸高密度的反应活性位和固体酸的不挥发性,近年来受到了广泛的关注.离子液体的酸性强度会影响化学反应的活性和作用位点的选择,测定离子液体的酸性强度对于认识酸催化反应机理、寻找合适的催化剂具有十分重要的指导意义.使用探针分子的分子光谱研究离子液体性质是一种重要的实验方法.本文主要介绍几种离子液体酸性的探针,着重介绍如何利用这些探针来测定离子液体的酸性强度.
Ionic liquids play an important role in organic synthesis and catalysis as green solvents and catalysts. Acidic ionic liquids (Ionic liquids) have attracted much attention in recent years because of their high density of reactive sites and the non-volatility of solid acids. Acid strength will affect the chemical reaction activity and the choice of site of action, determination of the acid strength of ionic liquids for understanding the mechanism of acid-catalyzed reactions, to find a suitable catalyst has very important guiding significance.Using the probe molecular molecular spectroscopy ionic liquid Nature is an important experimental method.This paper mainly introduces several kinds of ionic liquid acidic probes, highlighting how to use these probes to determine the ionic strength of ionic liquids.