Analytical Detection and Identification of Coumarins: Structural Differences, Spectral Responses, and Chromatographic Separation
The coumarin scaffold consists of a benzene ring fused to an α,β-unsaturated lactone ring. The C2 carbonyl group, C3=C4 double bond, and benzene ring form a continuous π-conjugated system. Upon ultraviolet irradiation, electrons can be promoted from the ground state to higher energy levels, ...
危险品化学品经营许可证（带存储）