Polyurea Modified with 4‐Dihydropyrimidone‐2‐ketone Rings by Biginelli Reaction and its Boostered AIE Characteristic

Front Cover: In article number 2100284 by Kuilin Deng and co-workers, AIE-active polydihydropyrimidones (PDPMDs) can be facilely synthesized by Biginelli reaction through introducing dihydropyrimidone rings onto non-AIE-active polyureas chains. The enhanced fluorescence of PDPMDs is actually regulated by the intramolecular “aggregation” of dihydropyrimidone rings based on the cluster triggering emission mechanism.