Transient luminescence spectroscopy of dialkylRu(bpy)32+-citratoperoxotitanate-dialykylviologen triad LB film deposited on quartz slab waveguide

Amphiphilic Ru(bpy)32+ complex (DC17Ru)—citratoperoxotitanate (CPT) —ditetradecylviologen (DC14V) triad nano-film was fabricated on quartz slab optical waveguide by organic-inorganic hybrid Langmuir-Blodgett method. Transient phosphorescence of the DC17Ru monolayer at 610 nm excited by 532 nm pulsed laser was observed by SOWG spectroscopy. The phosphorescence was partly quenched by the CPT layer and the quenching was enhanced by the DC14V monolayer underneath the CPT layer in the DC17Ru-CPT nano-film. Energy levels of the components, DC17Ru, CPT and DC14V suggests an exergonic cascade electron transfer mechanism from the excited state of DC17Ru to DC14V via the CPT.