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Comparison of crystal field dependent and independent methods to analyse lantha...

Geraldes, Carlos F. G. C.; Zhang, Shanrong; Sherry, A. Dean

A critical analysis of the lanthanide induced paramagnetic shift (LIS) data for several series of Ln3+ complexes of C3 symmetry in terms of structural changes, crystal-field effects and/or variation of hyperfine constants along the lanthanide series was undertaken using a combination of the two-nuclei and three-nuclei techniques together with the classical one-nucleus technique. The crystal-field independent tw...


Comparison of Crystal Field Dependent and Independent Methods to Analyse Lantha...

Geraldes, Carlos F. G. C.; Zhang, Shanrong; Sherry, A. Dean

Analysis of the LIS data for several series of Ln(3+) complexes of C(4) symmetry in terms of structural changes, crystal-field effects and/or variation of hyperfine constants along the lanthanide series was undertaken using a combination of the two-nuclei and three-nuclei techniques together with the classical onenucleus technique. Isostructurality of whole series of complexes, with changes of the F(i), and B(0...


Analysis of lanthanide induced NMR shifts using a crystal field independent met...

Ren, Jimin; Zhang, Shanrong; Dean Sherry, A.; Geraldes, Carlos F. G. C.

The linear graphical analysis of the LIS NMR data available for the axially symmetric complexes [Ln(DOTA)]- (M and m isomers), [Ln(DOTP)]5- (pH 10.0, 7.0 and 3) and [Ln(DOTEA)]3+ using the classical crystal field dependent method and a crystal field independent method were compared. As the second method provides ratios of geometric structural terms G rather than G values, the effect of lanthanide contraction wa...


Comparison of different methods for structural analysis of lanthanide-induced N...

Geraldes, Carlos F. G. C.; Zhang, Shanrong; Platas, C.; Rodrí­guez-Blas, T.; Blas, A. de; Sherry, A. D.

The three main methods available in the literature for lanthanide-induced shift (LIS) structural analysis of a series of lanthanide(III) complexes in solution are applied to the data available for a complete series of paramagnetic lanthanide cryptate complexes of a Schiff base axial macrobicyclic ligand L, [LnL]3+. The macrobicycle contracts its cavity as a result of the lanthanide contraction, while preserving...


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Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia