Prompt and delayed photoejection of hydrated electrons in the UV photolysis of aqueous solutions of copper(I) complexes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

Prompt and delayed photoejection of hydrated electrons in the UV photolysis of aqueous solutions of copper(I) complexes

Authors:	Kenneth L. Stevenson, Pamela B. Bell, Ravi S. Dhawale, Ott Horv th,Attila Horv th

Affiliation:	^a Department of Chemistry, Indiana University Purdue University Fort Wayne, Fort Wayne, IN 46805, USA ^b Department of Inorganic and General Chemistry, University of Veszprém P.O. Box 158, Veszprém H-8201, Hungary

Abstract:	The ejection of hydrated electrons from 266-nm laser-photoexcited solutions containing Cu(NH₃)⁺₃, CuCl²⁻₃, or CuBr²⁻₃ occurs through two pathways on the nanosecond time scale: a prompt ejection (ττ>laser pulsewidth) which follows a first-order rate law. This behavior is consistent with electron ejection from two excited states: the primary CTTS state, and longer-lived triplet species consisting of an exciplex and its precursor. The quantum yields for both prompt and delayed ejection are quite high, in the 0.15–0.4 range.

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