Interestingly, the core design template coumarin which is a naturally occurring molecular derivative . As opposed to RIR-type AIEgens that necessitate specific rotor, RIV-type AIEgens with expandable carboxyl groups, cyano groups, and fused heteroconjugated structures are quite pervasive in plant extracts. For illustrative purposes, only a pair of typical RIV-type AIEgens derived from plant extracts are being showcased here. Reproduced from Ref. Berberine Palmitate and ion pairs, exhibiting AIEE behavior with the increasing water content in the solvent. Reproduced from Ref. with permission. Copyright (2011), American Chemical Society.