Radiolysis of triacetoneaminoxyl (TANO) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) in aqueous solutions

Anastassopoulou, JD; Chandrinos, JD; Rakintzis, NTh

dc.contributor.author	Anastassopoulou, JD	en
dc.contributor.author	Chandrinos, JD	en
dc.contributor.author	Rakintzis, NTh	en
dc.date.accessioned	2014-03-01T01:05:58Z
dc.date.available	2014-03-01T01:05:58Z
dc.date.issued	1981	en
dc.identifier.issn	01465724	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9096
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-50849151995&partnerID=40&md5=8eaa87fa0a2dce9dbdac0d1bd49d4570	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.title	Radiolysis of triacetoneaminoxyl (TANO) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) in aqueous solutions	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1981	en
heal.abstract	In the present paper the mechanism of the γ-radiolysis of TANO and TEMPO in neutral deaerated aqueous solutions was investigated. The decomposition of TANO and TEMPO was followed spectrophotometrically by measuring the absorbance at the corresponding absorption maxima 235 and 245 nm. It was found, in agreement with other authors, that the main products of the radiolysis were the corresponding hydroxylamines TANOH and TEMPOH. In both cases a limiting decomposition yield was determined G(-TANO)=2.1, equal to GH+Ge-aq- 1 2GOH and G(-TEMPO) =3.2, equal to GH+Ge-aq. TANO and TEMPO were also irradiated in aqueous solutions of n-C3H7OH, 2-C3H7OH, n-C4H9OH, CH3OH, C2H5OH and formic acid, where only reducing radicals were present. G(-TANO) and G(-TEMPO) were found to be ≈6.1, equal to GH+GOH+He-aq. The above results are consistent with the formation of the corresponding hydroxylamines, when nitroxyls react with H atoms, e-aq and hydroxyalkyl radicals. The EPR spectra of irradiated solutions suggest that OH radicals react with the nitroxyls by abstraction of H atoms, leading to the formation of biradicals. © 1981.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Radiation Physics and Chemistry	en
dc.identifier.isi	ISI:A1981KZ77200009	en
dc.identifier.volume	17	en
dc.identifier.issue	1	en
dc.identifier.spage	55	en
dc.identifier.epage	61	en