Solution structure and dynamics of DTPA-Ln(III) complexes (DTPA=diethylene triamine penta acetate; LnLa, Pr, Eu)
摘要:
Variable temperature H-1 and C-13 NMR spectra and proton and carbon longitudinal relaxation times allow the complete characterization of the solution structure and dynamics of three Ln(III) complexes of DTPA (Ln = La, Pr and Eu). Our results show that a rapid interconversion between octadentate structures occurs on the NMR time scale which can be 'frozen out' at low temperature for Pr and Eu complexes.
Complexes of Ga<sup>3+</sup>and In<sup>3+</sup>with the N,N″-bis(butylamide) derivative of diethylenetriaminepentaacetic acid: stability constants and nuclear magnetic resonance studies in aqueous solution
作者:Carlos F. G. C. Geraldes、Rita Delgado、Ana M. Urbano、Judite Costa、François Jasanada、François Nepveu
DOI:10.1039/dt9950000327
日期:——
Potentiometric titrations showed that the sum of the first three protonation constants of diethylene-triaminepentaacetate N,N″-bis(butylamide)(L1) decreases by units when compared to the diethylenetriaminepentaacetate (dtpa), and that the complexes of Ga3+ and In3+ of L1 have stability constants 6.1–6.3 long units lower than those of dtpa. The decreased basicity of the bis (amide) derivative thus correlates
Oakes, John; Kralingen, Cornelis G. van, Journal of the Chemical Society, Dalton Transactions, 1984, p. 1133 - 1138
作者:Oakes, John、Kralingen, Cornelis G. van
DOI:——
日期:——
Catalytic alkaline oxidation of alcohols
申请人:CARBIDE &
公开号:US02384817A1
公开(公告)日:1945-09-18
Solution structure and dynamics of DTPA-Ln(III) complexes (DTPA=diethylene triamine penta acetate; LnLa, Pr, Eu)
作者:Silvio Aime、Mauro Botta
DOI:10.1016/s0020-1693(00)91917-0
日期:1990.11
Variable temperature H-1 and C-13 NMR spectra and proton and carbon longitudinal relaxation times allow the complete characterization of the solution structure and dynamics of three Ln(III) complexes of DTPA (Ln = La, Pr and Eu). Our results show that a rapid interconversion between octadentate structures occurs on the NMR time scale which can be 'frozen out' at low temperature for Pr and Eu complexes.