Thermodynamic and kinetic studies of lanthanide(III) complexes with mono(pyridine-N-oxide) analog of DOTA
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| Year of publication | 2009 |
| Type | Conference abstract |
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| Description | Ln(III) complexes of H4dota and its derivatives are utilized in many areas of medicine (e.g. complexes of metal radioisotopes as 90Y, 153Sm, 166Ho, 177Lu in nuclear medicine, Gd(III) complexes as MRI contrast agents, Eu(III) or Tb(III) complexes as luminescent probes). In this contribution, the thermodynamic and kinetic properties of Y(III) and Ln(III) complexes (Ln = Ce, Eu, Gd, Yb) of the mono(pyridine-N-oxide) H4dota derivative were studied by molecular absorption and emission spectroscopies (in UV/VIS region, luminescence, TRFS). The mechanisms of complex formation (pH = 5.0-6.0, t = 25 degrees of Celsius, I = 0.1 M KCl) and acid-assisted complex dissociation (t = 25-70 degrees of Celsius, I = 3.0 M (Na,H)ClO4) were proposed. Achieved results can be used for fluorimetric determination of Ln(III) ions in mixture. |
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