Dielectric studies of a bioactive tetramic acid and its complexes with Cu(II) and Co(II)

Zahariou, GK; Gavrielatos, E; Kalogeras, IM; Athanasellis, G; Vassilikou-Dova, A; Igglessi-Markopoulou, O; Markopoulos, J

dc.contributor.author	Zahariou, GK	en
dc.contributor.author	Gavrielatos, E	en
dc.contributor.author	Kalogeras, IM	en
dc.contributor.author	Athanasellis, G	en
dc.contributor.author	Vassilikou-Dova, A	en
dc.contributor.author	Igglessi-Markopoulou, O	en
dc.contributor.author	Markopoulos, J	en
dc.date.accessioned	2014-03-01T01:17:42Z
dc.date.available	2014-03-01T01:17:42Z
dc.date.issued	2002	en
dc.identifier.issn	1042-0150	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14634
dc.subject	Depolarization currents	en
dc.subject	Dielectric properties	en
dc.subject	Tautomeric forms	en
dc.subject	Tetramic acids	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Complexation	en
dc.subject.other	Dielectric devices	en
dc.subject.other	Electric currents	en
dc.subject.other	Polarization	en
dc.subject.other	Depolarization currents	en
dc.subject.other	Ligand	en
dc.subject.other	Tautomeric forms	en
dc.subject.other	Tetramic acids	en
dc.subject.other	Organic acids	en
dc.title	Dielectric studies of a bioactive tetramic acid and its complexes with Cu(II) and Co(II)	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/10420150215758	en
heal.identifier.secondary	http://dx.doi.org/10.1080/10420150215758	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	The 3-acyl tetramic acids constitute a growing class of natural products displaying a range of biological activities. The beta,beta ' tricarbonyl moiety present in the 3-acyl tetramic acid provides a suitable site for bidentate complexation to a metal, which increases the biological activity. For the dielectric study of N-acetyl-3-butanoyl tetramic acid and a series of its complexes with Cu(II) and Co(II) in symmetric and asymmetric forms, we used the Thermally Stimulated Depolarization Currents (TSDC) technique. The drastic decrease of the intensity of the TSDC peaks of the symmetric and asymmetric complexes, compared to the above mentioned ligand, suggested that the polarizability of the side groups is considerably reduced. This result enhances the proposed complexation mode of the ligand through oxygen next to carbons 3 and 4 of the 5-member ring.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	Radiation Effects and Defects in Solids	en
dc.identifier.doi	10.1080/10420150215758	en
dc.identifier.isi	ISI:000180483700083	en
dc.identifier.volume	157	en
dc.identifier.issue	6-12	en
dc.identifier.spage	1057	en
dc.identifier.epage	1062	en