Solvent Extraction and Coordination Properties of 1,10-Phenanthroline-2,9-dicarboxylic Acid Diamides with Alkyl-Aryl Substituents toward Lanthanides(III) and Americium(III)

Evsiunina, M.V.; Matveev, P.I.; Kalle, P.; Khult, E.K.; Lemport, P.S.; Avagyan, N.A.; Petrov, V.G.; Ustynyuk, Y.A.; Nenajdenko, V.G.

Авторы: Evsiunina Mariia V., Matveev Petr I., Kalle Paulina, Khult Enni K., Lemport Pavel S., Avagyan Nane A., Petrov Vladimir G., Ustynyuk Yury A., Nenajdenko Valentine G.
Журнал: Inorganic Chemistry
Год издания: 2025
Издательство: American Chemical Society
Местоположение издательства: United States
DOI: 10.1021/acs.inorgchem.4c04770
Аннотация: For a wide range of 1,10-phenanthroline-2,9-dicarboxylic acid diamides (DAPhen), differing in the structure of the amide substituent and the presence of chlorine atoms in the 4,7-positions of the phenanthroline core, the extraction properties for lanthanides(III) and americium(III) were studied. Protonation and binding constants to Eu(III) were determined using UV-vis titration. The values of binding constants and protonation constants are higher for non-substituted diamides than for 4,7-chlorinated diamides, which is in good agreement with the solvent extraction data. The structures of more than 20 complexes with lanthanide nitrates in solid state have been determined using X-ray diffraction analysis. Unusual DAPhen ligands complexes with lanthanum and neodymium nitrates were obtained. For the first time, the possibility of entering a water molecule into the internal coordination sphere of neodymium in a complex with the DAPhen ligand was shown, resulting in the coordination number of neodymium increasing to 11. An unusual complex with a bridge structure was obtained for lanthanum nitrate, in which the lanthanum ions have different coordination numbers of 10 and 12.
Добавил в систему: Евсюнина Мария Валерьевна

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Solvent Extraction and Coordination Properties of 1,10-Phenanthroline-2,9-dicarboxylic Acid Diamides with Alkyl-Aryl Substituents toward Lanthanides(III) and Americium(III)статья

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