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AIEgens Based on Anion‐π+ Interactions: Design, Synthesis, Photophysical Properties, and Their Applications in Material Science and Biology

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The design of novel aggregation-induced emission luminogens (AIEgens) has generally been facilitated by disrupting the possibility of π-π stacking. This concept article highlights a novel strategy to design AIEgens by introducing anion-π+ interactions to prevent the detrimental π-π stacking.


Abstract

The design of novel aggregation-induced emission luminogens (AIEgens), has generally been facilitated by disrupting the possibility of π-π stacking. The recent literature describes a novel strategy to design AIEgens by introducing anion-π+ interactions to prevent the detrimental π-π stacking. This new strategy provides access to intrinsically charged AIEgens whose photophysical properties can be tuned either by incorporating different substituents on the π-molecular scaffold to modulate the acidity for tuning the interaction energy between a π-acceptor and counter-anions. This concept article provides a brief overview of the field, focusing on the synthesis of AIEgens, their photophysical properties, crystallography studies and their applications in live cell fluorescence imaging.

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