Nowadays, electrochemiluminescence (ECL) efficiency of an organic emitter is closely related with its potential applications in food safety and environmental monitoring fields. In this work, 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine (TATB) was self-assembled to form hydrogen bond organic frameworks (HOFs), which worked as ideal reactors to generate highly active oxygen-containing radicals, followed by linking with isoluminol (ILu) via amide bond (termed ILu-HOFs). After covalent assembly with aminated indium−tin oxide electrode (labeled NH 2 -ITO), the ECL efficiency of the ILu-HOFs NH 2 -ITO showed about a 23.4time increase over that of ILu itself in the presence of H 2 O 2 . Meanwhile, the enhanced ECL mechanism was mainly studied by electron paramagnetic resonance, theoretical calculation, and electrochemistry. On the above foundation, an aptamer "sandwich" ECL biosensor was constructed for detecting isocarbophos (ICP) via in situ elimination of H 2 O 2 with catalase-linked palladium nanocubes (CAT-Pd NCs). The as-built sensor showed a broad linear range (1 pM to 100 nM) and a low limit of detection (LOD) down to 0.4 pM, coupled with efficient assays of ICP in lake water and cucumber juice samples. This strategy provides an effective way for the synthesis of advanced ECL emitter, coupled by showing promising applications in environmental and food analysis.

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...

Intermolecular [2+2] photodimerization provides a distinctive approach to construct photoresponsive fluorescent materials in a manner of switching on solid‐state fluorescence. Herein, we report efficient photoactivation of bright solid‐state fluorescence based on controllable intermolecular [2+2] photodimerization reaction of benzo[b]thiophene 1,1‐dioxide (BTO) derivatives, which provides a simple and effective way to construct smart photoresponsive solid‐state fluorescent materials. Rational choice of substituent in BTO molecular skeleton enables them to efficiently undergo photodimerization through regulating molecular stacking in crystal, and also leads to photoactivation of solid‐state fluorescence due to the generation of brightly fluorescent photodimers. This intermolecular photodimerization reaction also offers an effective method to synthesize photostable AIEgens with purely through‐space conjugation.