Recent advancements in ion?pair receptors: A critical review

Over the past two decades, non?covalent chemistry has introduced various promising artificial receptors and revolutionizes the host?guest chemistry. These versatile receptors have particularly been entertained in sensing and recognizing of diverse neutral molecules and/or ionic entities (e.g. anions, cations and ion?pair) of particular interest. Notably, the supramolecular chemistry had given birth to a plethora of important molecules, explored in chemical, biological, environmental, & pharmacological world to resolve the critical issues related to the human health while keeping the environmental concerns in mind. Amongst the various types of supramolecular monotopic receptors (anions, cations, & neutral molecules), the heteroditopic receptors (ion?pair receptors) consisting of distinct binding sites in one system for both cation as well anion, have gained much interest from the scientific community in recent past because of their unique binding abilities. Interestingly, these promising artificial receptors have shown potential applications in sensing, recognition, transport & extraction processes besides their uses in salt/waste purification. Bearing the importance of these systems in mind, we indented to report the recent developments in ion?pair chemistry. Herein, we divided the whole document into three main sections; first one describes the introduction and history of the ion?pairs receptors. The second portion highlights, synthesis & applications of ion?pair receptors in sensing, recognition, molecular machines, photoswitching behaviour, extraction and transport properties. Whereas, the last part of this manuscript discusses the concluding remarks as well as feature prospects of ion?pair receptors. We hope that this manuscript will be very helpful to the stimulating researchers around the globe to find out the hidden opportunities in this and allied areas.

» Publication Date: 22/11/2022

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