Highly Efficient Aggregation‐induced Electrochemiluminescence Performance of Covalent Organic Frameworks with Electron‐rich Conjugated Structures

symmetrical five-membered heteroaromatic monomers are designed as ECL emitter in aqueous media. Significantly, the ECL intensity of COFs with terthienyl units (TTA-TAPE) is 206 times that of COFs with furan units in the presence of tri-n-propylamine (TPrA), which is the result of enhancing ECL signals by increasing the thiophene units and π-π conjugation of COFs. Furthermore, the ECL mechanism of these COFs is vested in the bandgap model. Thus, the study provides a strategy for designing highly efficient ECL-active COFs emitters with excellent AIECL efficiency.