Photoinduced electron transfer within ion pairs. Direct measure of the intramolecular electron-transfer quenching constant期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Photoinduced electron transfer within ion pairs. Direct measure of the intramolecular electron-transfer quenching constant

Affiliation:	1. Department of Chemistry, Texas A&M University, College Station, TX 77843, USA;5. Sri Venkateswara College, Department of Chemistry, University of Delhi, New Delhi, India;6. Kalindi College, Department of Chemistry, University of Delhi, New Delhi, India

Abstract:	The electron-transfer quenching of the luminescence emission of Ru(bpy)₃²⁺ (bpy = 2,2′-bipyridine) by CoSiW₁₁O₃₉H₂O⁶⁻ has been studied by steady-state and pulsed techniques. Both static and dynamic quenching were observed. The luminescence emission was found to decrease with time according to two distinct exponential decays. A kinetic analysis of the system shows that the faster decay corresponds to the intramolecular electron transfer rate constant within the =Ru(bpy)₃²⁺ -polytungstate ion pair and that the slower decay is related to the dynamic quenching.

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