Rapid detection of tryptamine by optosensor with molecularly imprinted polymers based on carbon dots-embedded covalent-organic frameworks

A rapid optosensing detection method for tryptamine (TRY) based on one-pot surface-imprinting synthesis methods has been developed. The optosensor consists of molecularly imprinted polymers (MIPs) based on carbon dots (CNs)-embedded covalent-organic frameworks (COFs). The principle of operation depends on adsorbents providing a large number of accessible recognition sites with high affinity and specificity, to achieve both a rapid uptake of and high capacity for TRY. After removing the template molecules, the desired molecular cavities were selected and fixed in a distinct manner to provide a defined chemical microenvironment for the reversible binding of the TRY target molecules. The optosensing system relied on the linear relationship between the fluorescence intensity of the TRY-imprinted polymers and the concentration of TRY in the range of 0.025-0.4 mg kg(-1) with a detection limit of 7 mu g kg(-1). The system was used for efficiently detecting TRY in meat samples with recovery values from 91.42% to 119.80%.