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Titolo:
MULTINUCLEAR NMR-STUDY OF THE INTERACTIONS BETWEEN THE LA(III) COMPLEX OF DTPA-BIS(GLUCAMIDE) AND ZN(II) OR BORATE
Autore:
LAMMERS H; VANDERHEIJDEN AM; VANBEKKUM H; GERALDES CFGC; PETERS JA;
Indirizzi:
DELFT UNIV TECHNOL,ORGAN CHEM & CATALYSIS LAB,JULIANALAAN 136 NL-2628BL DELFT NETHERLANDS DELFT UNIV TECHNOL,ORGAN CHEM & CATALYSIS LAB NL-2628 BL DELFT NETHERLANDS UNIV COIMBRA,FAC SCI & TECHNOL,DEPT BIOCHEM P-3049 COIMBRA PORTUGAL UNIV COIMBRA,CTR NEUROSCI P-3049 COIMBRA PORTUGAL
Titolo Testata:
Inorganica Chimica Acta
fascicolo: 2, volume: 268, anno: 1998,
pagine: 249 - 255
SICI:
0020-1693(1998)268:2<249:MNOTIB>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMAGING CONTRAST AGENTS; MAGNETIC-RESONANCE; B-11 NMR; DIETHYLENETRIAMINEPENTAACETIC ACID; LANTHANIDE(III) COMPLEXES; AQUEOUS-SOLUTION; STABILITY; ESTERS; WATER; MEDIA;
Keywords:
LANTHANUM COMPLEXES; DTPA COMPLEXES; GLUCAMIDE COMPLEXES; TRANSMETALATION; MRI CONTRAST AGENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
H. Lammers et al., "MULTINUCLEAR NMR-STUDY OF THE INTERACTIONS BETWEEN THE LA(III) COMPLEX OF DTPA-BIS(GLUCAMIDE) AND ZN(II) OR BORATE", Inorganica Chimica Acta, 268(2), 1998, pp. 249-255

Abstract

The interaction between ZnCl2 and La(DTPA) (DTPA = diethylenetriamine-N,N,N',N '',N ''-penta-acetate), La(DTPA-PA(2)) (DTPA-PA(2) = DTPA-bis(propylamide)) or La(DTPA-GlucA(2)) (DTPA-GlucA(2) = DTPA-bis(glucamide)) has been studied using C-13 and La-139 NMR. Extensive transmetallation occurs, which is assisted by interaction between the ionic species formed. It is shown that these interactions involve mainly the DTPAbackbone of the ligands. The sugar side-chains of La(DTPA-GlucA(2)) have no significant affinity for the metal ions. With the aid of B-11 NMR it is demonstrated that berate does interact with the polyhydroxy side-chains. The stoichiometries of the various berate ester species derived from DTPA-GlucA(2) and its Ln(III) complexes are investigated byrecording the corresponding Job plots. A major species has a berate moiety linking the two glucitol side-chains under the formation of a macrocyclic compound. The stability constants of the occurring berate ester species as determined by B-11 NMR are reported. (C) 1998 Elsevier Science S.A.

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Documento generato il 02/12/20 alle ore 05:16:36