Electrochemical and Photoelectrochemical Investigation of New Self-Assembled Films Based on Prussian Blue and a Terpyridyl Ru-II Complex

摘要

A new hybrid multilayer film containing Prussian blue (PB) and a bis-terpyridyl Ru-II complex of Ru-II(L)(2)(ClO4)(2) (in which L=4-(4-(imidazol-1-yl)phenyl)-2,2:6,2-terpyridine), was fabricated though covalently and electrostatic layer-by-layer self-assembly techniques, and characterised by UV-vis absorption spectroscopy, cyclic voltammetry, and photoelectrochemical techniques. The results demonstrated that the two film-forming components were successfully transferred into the hybrid film, which exhibited three quasi-reversible redox couples centred at 0.06, 0.76, and 1.0V. The photoelectrochemical studies showed that an 11-layer film exhibited a large cathodic photocurrent density of 7.72Acm(-2) while irradiated with 100mWcm(-2) polychromatic light (325730nm) at an applied potential of -0.2V versus a saturated calomel electrode.