Compound and structural body for detecting hydrogen sulfide

A compound represented by formula 1:

• wherein
• Dye denotes an optical absorber with optical absorption in a wavelength range of 350 to 700 nm and with a highest molecular absorption coefficient of 104 M−1 cm−1 or more,
• A1 denotes a substituted or unsubstituted alkylene or alkoxy group having 3 to 12 carbon atoms,
• B1 denotes a member selected from the group consisting of —C(═O)—, —S(═O)2−, and —CH2−,
• B2 denotes a member selected from the group consisting of —H, —NHC(═S)NH—(CH2CH2O)n−CH3, and —NHC(═S) amino acids, wherein n denotes an integer in the range of 1 to 25, and
• B3 denotes a member selected from the group consisting of —OH, —NH2, —NHCH3, —NHCH2CH3, —N(CH3)2, and —N(CH2CH3)2.