photosignal transduction systems of benzo-15-crown-5 (B15C5) azoprobe/γ-cyclodextrin (γ-CyD) complexes were designed. Four B15C5 azoprobes were synthesized by azo coupling of 4'-aminobenzo-15-crown-5 with phenol (for 15C5-Az-Ph) and N,N-dialkylanilines (for 15C5- Az-Cn). These azoprobes exhibited strong induced circular dichroism (ICD) by forming an inclusion complex with γ-CyD. Examination of the spectral