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Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis

Radharani, Das and Binay K., Dutta and Valter, Maurino and Davide, Vione and Claudio, Minero (2009) Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis. ENVIRONMENTAL CHEMISTRY LETTERS , 7 (4 ). 337-342 . ISSN 1610-3653

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Abstract

In this paper we show that bromide scavenges the (OH)-O-center dot radicals formed upon photolysis of nitrate, before they leave the solvent cage. Bromide can thus inhibit the in-cage recombination between (OH)-O-center dot and (NO2)-N-center dot. The consequence is an increased generation of (NO2)-N-center dot and nitrite and of Br-2 (-center dot) + (OH)-O-center dot, compared to (OH)-O-center dot alone in the absence of bromide. We show that this effect compensates for the lower reactivity of Br (2) (-center dot) compared to (OH)-O-center dot toward certain organic substrates, e.g. phenol and tryptophan. Our findings could lead to a deep revision of the present views of the role of bromide in saltwater photochemistry.

Item Type:Article
Impact Factor:Cites in 2009 to articles published in: 2008 = 54 Number of articles published in: 2008 = 31 2007 = 81 2007 = 33 Sum: 135 Sum: 64 Calculation: Cites to recent articles 135 = 2.109 Number of recent articles 64
Uncontrolled Keywords:Chemistry, Multidisciplinary; Engineering, Environmental; Environmental Sciences
Subjects:T Technology > TD Environmental technology. Sanitary engineering
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:2341
Deposited By: Mr Helmi Iskandar Suito
Deposited On:23 Jun 2010 10:01
Last Modified:19 Jan 2017 08:25

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