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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...
Potentiometry and NMR studies of 1,5,9-triazacyclododecane-N,N',N''-triacetic a...
Cortes, S.; Brucher, E.; Geraldes, C. F. G. C.; Sherry, A. D.A new chelating macrocycle, 1,5,9-triazacyclododecane-N,N’,N’’-triacetiacc id (DOTRA), has been synthesized, and its complexes with Zn2’, Cd2+, Ca2+, Mg2+, and Mn2+ have been examined by potentiometry and NMR spectroscopy. The first protonation constant of the free ligand (log K, = 12.8) was determined spectrophotometrically, while the remaining were evaluated from potentiometric data (log K2 = 7.55, log K, = 3...
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