Kinetic and mechanistic aspects of the direct photodegradation of atrazine, atraton, ametryn and 2‐hydroxyatrazine by 254 nm light in aqueous solution | Zendy

Azenha M. E. D. G. | Zendy; Burrows H. D. | Zendy; Canle L. M. | Zendy; Coimbra R. | Zendy; Fernández M. I. | Zendy; García M. V. | Zendy; Peiteado M. A. | Zendy; Santaballa J. A. | Zendy

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Kinetic and mechanistic aspects of the direct photodegradation of atrazine, atraton, ametryn and 2‐hydroxyatrazine by 254 nm light in aqueous solution

Author(s) -

Azenha M. E. D. G.,

Burrows H. D.,

Canle L. M.,

Coimbra R.,

Fernández M. I.,

García M. V.,

Peiteado M. A.,

Santaballa J. A.

Publication year - 2003

Publication title -

journal of physical organic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.325

H-Index - 66

eISSN - 1099-1395

pISSN - 0894-3230

DOI - 10.1002/poc.624

Subject(s) - chemistry , photodegradation , atrazine , triazine , aqueous solution , photochemistry , alkylation , organic chemistry , pesticide , photocatalysis , catalysis , agronomy , biology

Atrazine ( 1 ), Atraton ( 2 ) and Ametryn ( 3 ) are photodegraded upon 254 nm irradiation, yielding 2‐OH‐atrazine ( 4 ) as a photoproduct. Dealkylation products are also generated, and 4‐ethylamino‐6‐isopropylamino‐(1,3,5)‐triazine was also found as a photoproduct of 3 . The main photoreaction is proposed to be an addition–elimination, yielding 4 , which subsequently photodegrades. The ease of photodegradation depends on the electron availability at position C‐2, the observed order of photoreactivity being 1 > 3 > 4 > 2 . Copyright © 2003 John Wiley & Sons, Ltd.

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