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Photochemistry of PtBr62− complex in aqueous solutions. Formation and decay of Br2•− radical anions

Paper ID Volume ID Publish Year Pages File Format Full-Text
26906 43986 2010 7 PDF Available
Title
Photochemistry of PtBr62− complex in aqueous solutions. Formation and decay of Br2•− radical anions
Abstract

Laser flash photolysis was applied to study the photochemistry of PtBr62− complex in aqueous solutions with the presence of free Br− anions. Laser pulse is followed by the formation of Br2•− radical anion, which reacts with the initial complex with the rate constant k = 9 × 108 M−1 s−1 yielding the complex of Pt(V). Analysis of Br2•− quantum yield via bromide concentration testifies that a bromine atom is formed by an electron transfer from a free Br− anion to the light-excited complex. PtBr62− photoaquation occurs via heterolytic cleavage of the Pt–Br bond. Addition of free bromide anions sufficiently decreases the quantum yield of photoaquation.

Keywords
Photochemistry; Haloid complexes of Pt(IV); Aqueous solutions; UV spectra; Laser flash photolysis; Primary photochemical processes; Dihaloid radical anions
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Photochemistry of PtBr62− complex in aqueous solutions. Formation and decay of Br2•− radical anions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 214, Issues 2–3, 15 August 2010, Pages 181–187
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us