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The viscosity and temperature dependence of 1H T1-NMRD of the Gd(H2O)83+ 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, 335-42 p.Article in journal (Refereed) Published
Abstract [en]

Water proton T1-NMRD profiles of the Gd(H2O)83+ complex have been recorded at three temperatures and at four concentrations of glycerol. The analysis is performed using both the generalized Solomon–Bloembergen–Morgan (GSBM) theory [J. Magn. Reson. 167(2004), 147–160], and the stochastic Liouville approach (SLA). The GSBM approach uses a two processes dynamic model of the zero-field splitting (ZFS) correlation function whereas SLA uses a single process model. Both models reproduce the proton T1-NMRD profiles well. However, the model parameters extracted from the two analyses, yield different ESR X-band spectra which moreover do not reproduce the experimental ESR spectra. It is shown that the analyses of the proton T1-NMRD profiles recorded for a solution Gd(H2O)83+ ions are relatively insensitive to the slow modulation part of dynamic model of the ZFS interaction correlation function. The description of the electron spin system results in a very small static ZFS, while recent ESR lineshape analysis indicates that the contribution from the static ZFS is important. Analysis of proton T1-NMRD profiles of Gd(H2O)83+ complex do result in a description of the electron spin system but these microscopic parameters are uncertain unless they also are tested in a ESR-lineshape analysis.

Place, publisher, year, edition, pages
2005. Vol. 62, no 1-3, 335-42 p.
Keyword [en]
1H T1-NMRD, Gd(H2O)83+, Solomon–Bloembergen–Morgan theory, Stochastic Liouville approach
URN: urn:nbn:se:umu:diva-14679DOI: doi:10.1016/j.saa.2004.12.051OAI: diva2:154351
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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