Switchable solid-state emission in GFP chromophore analogue cocrystals via competing AIE and ACQ pathways

Abstract

We present a crystal-engineering approach enabling switchable solid-state emission (green → orange → quenched) in GFP-chromophore analogue cocrystals. The coformer's electronic and supramolecular effect shifts the photophysical pathway: intramolecular CT in cocrystal-I (green) and cocrystal-III (quenched) and intermolecular CT in cocrystal-II, yielding orange emissions and highlighting cocrystallization's power for tunable luminophores.