Dynamic regulation of hydrogen bond-induced fluorescent chiral MOFs with photoexcited activity

Chiral metal-organic frameworks (CMOFs), characterized by their enantioselective porous architectures, intrinsic chirality, and precisely ordered active sites, have emerged as a transformative class of materials with applications spanning asymmetric catalysis, enantiomeric separation, and chiral sensing. In this study, persulfurated arenes, as AIEgens with photoexcitation activity, were used as fluorescent dyes. Using γ-cyclodextrin as a chiral template, we constructed a photo-responsive CMOF via intermolecular hydrogen bonding. The co-assembly process exhibited remarkable phenomena of chiral amplification and transfer, generating bright yellow fluorescence under mild UV irradiation at 365 nm. Deprotonated persulfurated arenes were used for comparative studies, and the resulting photoresponsive chiral metal-organic frameworks showed signals of reversed peaks at 400 and 460 nm. This study provides a novel construction strategy for chiral metal-organic frameworks featuring dual dynamic regulation mechanisms mediated by hydrogen bonding and photoirradiation.