Investigation of the photoelectric conversion of a novel molecule (E)-N-methyl-4-{2-[4-(dihexadecylamino)phenyl]ethenyl}pyridazinium iodide, in LB films fabricated on an SnO2 electrode

An investigation of cathodic photocurrent response from a novel molecule with strong non-linear optical properties (second harmonic generation), (E)-N-methyl-4-{2-[4-(dihexadecylamino)phenyl]ethenyl}pyridazinium iodide (MHPd)in LB films on transparent SnO2 glass has been-carried out. A quantum yield of 0.3% was obtained under irradiation with 450 nm light in 0.5 mol dm(-3) KCl electrolyte solution and ambient conditions. The studies of the relationship between the light intensity and the cathodic photocurrent indicate that MHPd assemblies perform a unimolecular process in charge recombination. The effects of bias voltage, oxygen and nitrogen; electron donors and accepters such as methyl viologen diiodide, ascorbic acid and hydroquinone were examined and have provided supporting evidence for the proposed electron-transfer mechanism.