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Electron paramagnetic resonance of Gd3+ aqua complexes in vitrified aqueous solutions and Gd3+ aqua ions adsorbed on the capillary surface

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dc.contributor.author Vishnevskaya G.
dc.contributor.author Frolova E.
dc.contributor.author Gataullin A.
dc.date.accessioned 2018-09-17T21:13:56Z
dc.date.available 2018-09-17T21:13:56Z
dc.date.issued 2003
dc.identifier.issn 1063-7834
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/134705
dc.description.abstract Electron paramagnetic resonance (EPR) spectra of Gd3+ aqua complexes are measured in dilute aqueous solutions of Gd(NO3)3 (C < 0.2 M) at room temperature. A partial resolution of the fine structure observed in the spectra is characteristic of solid disordered systems and results in an increase in the effective width of the EPR line with a decrease in the Gd3+ concentration. This phenomenon is explained in terms of adsorption of Gd3+ aqua ions on the surface of the measuring capillaries. The fine structure is revealed in the EPR spectra of Gd(NO3)3 aqueous solutions, namely, the Gd(NO3)3 solutions vitrified at a temperature of 77 K (with an addition of 10-15 vol % glycerol) and Gd(NO3)3 solutions quasi-vitrified at 298 K (with an addition of 70-90 vol % glycerol). Analysis of the EPR spectra demonstrates that these solutions contain two types of aqua complexes with fine structure parameters D1 = 180 G and D2 = 580 G. Reasoning from a comparison with x-ray diffraction data, the fine structure parameters D1 and D2 are assigned to higher symmetric eight-coordinate and lower symmetric nine-coordinate Gd3+ aqua complexes, respectively. © 2003 MAIK "Nauka/Interperiodica".
dc.relation.ispartofseries Physics of the Solid State
dc.title Electron paramagnetic resonance of Gd3+ aqua complexes in vitrified aqueous solutions and Gd3+ aqua ions adsorbed on the capillary surface
dc.type Article
dc.relation.ispartofseries-issue 5
dc.relation.ispartofseries-volume 45
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 859
dc.source.id SCOPUS10637834-2003-45-5-SID0038179645


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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