Construction of molecularly imprinted sensor based on covalent organic frameworks DAFB-DCTP-doped carbon nitride nanosheets with high electrochemiluminescence activity for sensitive detection of carbaryl

A novel electrochemiluminescent sensor for sensitive and accurate detection of carbaryl was firstly constructed based on a covalent organic frameworks DAFB-DCTP with high quantum efficiency, doped with carbon nitride nanosheets (CNNs) with high electrochemiluminescent properties, and then prepared by electropolymerization of highly selective molecularly imprinted polymers. The rare combination of the covalent organic framework DAFB-DCTP with highly stable CNNs brought out the best performance of each other, which made the sensor with efficient electrochemiluminescence performance and delivered more sensitive and accurate detection. Further, the molecular imprinting technology provided an exclusive channel for selective sensing of the sensor. The support of these two technologies made the sensor not only have ultra- sensitivity, excellent stability, high specificity, and a wide detection range (1 × 10-10 ∼ 5 × 10-4 mol L-1) with low detection limit (4.67 × 10-11 mol L-1). Besides, the sensor has achieved satisfactory recoveries in actual samples, indicating its excellent practical applicability and promising application. It also provides a new path for the application of DAFB-DCTP.