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- W1974471036 abstract "Abstract The interaction between ZnCl2 and La(DTPA) (DTPA = diethylenetriamine-N,N,N′,N″,N″-penta-acetate), La(DTPA-PA2) (DTPA-PA2 = DTPA-bis(propylamide) ) or La(DTPA-GlucA2) (DTPA-GlucA2 = DTPA-bis(glucamide)) has been studied using 13C and 139La NMR. Extensive transmetallation occurs, which is assisted by interaction between the ionic species formed. It is shown that these interactions involve mainly the DTPA backbone of the ligands. The sugar side-chains of La(DTPA-GlucA2) have no significant affinity for the metal ions. With the aid of 11B NMR it is demonstrated that borate does interact with the polyhydroxy side-chains. The stoichiometries of the various borate ester species derived from DTPA-GlucA2 and its Ln(III) complexes are investigated by recording the corresponding Job plots. A major species has a borate moiety linking the two glucitol side-chains under the formation of a macrocyclic compound. The stability constants of the occurring borate ester species as determined by 11B NMR are reported." @default.
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- W1974471036 date "1998-02-01" @default.
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- W1974471036 title "Multinuclear NMR study of the interactions between the La(III) complex of DTPA-bis(glucamide) and Zn(II) or borate" @default.
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- W1974471036 doi "https://doi.org/10.1016/s0020-1693(97)05752-6" @default.
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