Chemiluminescent properties of some luminol-related compounds ¯¯ Part 3

Novel luminol-related compounds containing a 2-arylbenzothiazole moiety were synthesized by the reaction of a series of aromatic aldehydes with 7-amino-6-sulfanylphthalazine-1,4 (2H,3H)-dione (ASPH). The chemiluminescent properties of the ASPH derivatives were examined and compared with luminol and ASPH. All compounds produced chemiluminescence by reaction with hydrogen peroxide in the presence of potassium hexacyanoferrate(III) in sodium hydroxide solution. The chemiluminescence intensities of the chemiluminophores were influenced by the concentrations of hydrogen peroxide, potassium hexacyanoferrate(III) and sodium hydroxide. The ASPH derivatives of the aromatic aldehydes examined were found to produce chemiluminescence 1.1¯40 times more intensely than luminol.