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.