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Photosensitized oxidation of bromide to bromine catalyzed by niobium pentachloride in methanol solution: Formation and crystal structure of the tetraphenylphosphonium tribromide

Paper ID Volume ID Publish Year Pages File Format Full-Text
27955 44052 2007 7 PDF Available
Title
Photosensitized oxidation of bromide to bromine catalyzed by niobium pentachloride in methanol solution: Formation and crystal structure of the tetraphenylphosphonium tribromide
Abstract

This article examines the photoproduction of bromine by UV–vis light irradiation in the presence of niobium pentachloride in methanol media, under aerobic conditions. The reaction of tetraphenylphosphonium bromide with niobium pentachloride in methanol, thus, produced the corresponding tribromide. X-ray studies were performed on the tribromide compound to confirm the oxidation reaction. To our knowledge, the homogeneous photocatalytic oxidation of halogen ions when niobium pentachloride is photosensitized is the first example of the photocatalytic properties of this reagent. The photo-oxidation of the halogen ions was carried out under several conditions. The nearly linear oxo-bridges seem to favour this photocatalytic action.

Keywords
Bromide oxidation; Niobium pentachloride; Polyoxoalkoxide; Photosensitized; Tribromide
First Page Preview
Photosensitized oxidation of bromide to bromine catalyzed by niobium pentachloride in methanol solution: Formation and crystal structure of the tetraphenylphosphonium tribromide
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 192, Issue 1, 15 November 2007, Pages 29–35
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering