Host–Guest Sensory System of Dansyl-Modifled β-Cyclodextrin for Detecting Steroidal Compounds by Dansyl Fluorescence

Dansyl-modifled β-cyclodextrin decreases its fluorescence intensity upon guest binding, and this phenomenon was used to detect steroidal compounds. This system exhibited remarkable molecular recognition, showing high sensitivities for ursodeoxycholic acid and chenodeoxycholic acid.