Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis
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)...
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SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
2009
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| Online Access: | http://scholars.utp.edu.my/id/eprint/2341/ http://scholars.utp.edu.my/id/eprint/2341/1/SAMPLE_PAPER_PDF.pdf |
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| author | Radharani, Das Binay K., Dutta Valter, Maurino Davide, Vione Claudio, Minero |
| author_facet | Radharani, Das Binay K., Dutta Valter, Maurino Davide, Vione Claudio, Minero |
| author_sort | Radharani, Das |
| building | UTP Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-13T07:27:10Z |
| format | Article |
| id | oai:scholars.utp.edu.my:2341 |
| institution | Universiti Teknologi Petronas |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-13T07:27:10Z |
| publishDate | 2009 |
| publisher | SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:scholars.utp.edu.my:23412017-01-19T08:25:08Z http://scholars.utp.edu.my/id/eprint/2341/ Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis Radharani, Das Binay K., Dutta Valter, Maurino Davide, Vione Claudio, Minero TD Environmental technology. Sanitary engineering 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. SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY 2009-12 Article PeerReviewed application/pdf en http://scholars.utp.edu.my/id/eprint/2341/1/SAMPLE_PAPER_PDF.pdf 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 http://apps.isiknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=10&SID=X212JDdPAc7358p5C3D&page=1&doc=1 10.1007/s10311-008-0176-8 10.1007/s10311-008-0176-8 |
| spellingShingle | TD Environmental technology. Sanitary engineering Radharani, Das Binay K., Dutta Valter, Maurino Davide, Vione Claudio, Minero Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| title | Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| title_full | Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| title_fullStr | Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| title_full_unstemmed | Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| title_short | Suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| title_sort | suppression of inhibition of substrate photodegradation by scavengers of hydroxyl radicals: the solvent-cage effect of bromide on nitrate photolysis |
| topic | TD Environmental technology. Sanitary engineering |
| url | http://scholars.utp.edu.my/id/eprint/2341/ http://scholars.utp.edu.my/id/eprint/2341/ http://scholars.utp.edu.my/id/eprint/2341/ http://scholars.utp.edu.my/id/eprint/2341/1/SAMPLE_PAPER_PDF.pdf |