A chiral fluorescent COF prepared by post-synthesis modification for optosensing of imazamox enantiomers

Dual-functional porphyrinic zirconium-based metal–organic framework for the fluorescent sensing of histidine enantiomers and Hg2+

“…The fluorescence quenching ratio ( Q R ) was described from F / F 0 of the d - and l -enantiomer. 34 Q R = ( F / F 0 ) d /( F / F 0 ) l …”

Chiral Materials: Progress, Applications, and Prospects

“…The chiral groups are controlled and fixed on the established COFs, so that the required functional segments can be connected more flexibly without changing the crystallinity, thermal stability, and other properties of the former framework, so as to produce more functional CCOFs materials and increase their performance utilization. [ 228 ] The post‐modification method provides a versatile route to introduce various types of chiral components into COFs without changing the backbone structure, and it avoids or minimizes the occurrence of side reactions. [ 229 ] Because the post‐modification can achieve the desired function without changing the properties of the synthesized COFs materials, this chiral synthesis method is more popular among researchers at present.…”

Post-synthetic modifications of covalent organic frameworks (COFs) for diverse applications

“…In one effort, the amine groups in COF reacted with (1 S )-(+)-10-camphorsulfonyl chloride to fabricate a chiral COF with sulfonamide functionalities. 34 Also, nucleophilic substitution can lead to the formation of cationic COFs, an emerging category of COFs with diverse applications. 35 For example, this substitution reaction can be accomplished in pyridine moieties of COFs by its nucleophilic attack to bromoethane to achieve a cationic COF.…”