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Multiwavelength-controlled multicolor photochromism and fluorescence switching were achieved by introducing two photoactive subunits with varied conjugation into the tetraarylethene skeleton with aggregation-induced emission.

Restriction of intramolecular motions of AIEgens is greatly intensified by introducing dynamic metal coordination bonds to achieve dramatic fluorescence enhancement, which provides a simple and effective way to dramatically improve the emission efficiency of AIEgens. AIEgen-based metal complexes have an abnormal anti-heavy-atom effect, which contributes to their high emission efficiencies without changing their emission nature.