INVESTIGATION OF THE PHOTOELECTRIC CONVERSION OF A NOVEL MOLECULE 2-[4-(DIHEXADECYLAMINO)PHENYL]ETHENYL)PYRIDAZINIUM IODIDE, IN LB FILMS FABRICATED ON AN SNO2 ELECTRODE

An investigation of cathodic photocurrent response from a novel molecu le with strong non-linear optical properties (second harmonic generati on), 2-[4-(dihexadecylamino)phenyl]ethenyl}pyridazinium iodide (MHPd)i n LB films on transparent SnO2 glass has been-carried out. A quantum y ield of 0.3% was obtained under irradiation with 450 nm light in 0.5 m ol dm(-3) KCl electrolyte solution and ambient conditions. The studies of the relationship between the light intensity and the cathodic phot ocurrent indicate that MHPd assemblies perform a unimolecular process in charge recombination. The effects of bias voltage, oxygen and nitro gen; electron donors and accepters such as methyl viologen diiodide, a scorbic acid and hydroquinone were examined and have provided supporti ng evidence for the proposed electron-transfer mechanism.