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The viscosity and temperature dependence of X-band ESR lineshapes of Gd(III) aqueous complex
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
2005 (English)In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Vol. 62, no 1-3, 76-82 p.Article in journal (Refereed) Published
Abstract [en]

X-band ESR spectra of Gd-aqua complex in various weight concentration of glycerol have been recorded at four temperatures. The interpretation of the ESR linewidth is preformed using both the stochastic Liouville approach (SLA) and a perturbation theory. The SLA uses a one dynamic model of the zero-field splitting whereas the perturbation approach uses a two dynamic model. Both models can reproduce the variation of the linewidth with respect to viscosity. In the SLA model, both the zero-field splitting (ZFS) interaction and the correlation time vary with the glycerol content. In the two dynamic perturbation model, only the correlation times are viscosity dependent. The two models give different NMRD profiles.

Place, publisher, year, edition, pages
2005. Vol. 62, no 1-3, 76-82 p.
Keyword [en]
ESR lineshape, Gd(III) aqueous complex, Stochastic Liouville equation
URN: urn:nbn:se:umu:diva-14678DOI: doi:10.1016/j.saa.2004.11.054OAI: diva2:154350
Available from: 2007-06-12 Created: 2007-06-12 Last updated: 2011-01-12Bibliographically approved

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Westlund, Per-Olof
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