Synthesis of Nonadentate Ligand Diethylene Glycol-Bis(3-Aminopropyl Ether)-<i>N</i>,<i>N</i>,<i>N'</i>,<i>N'</i>-Tetraacetic Acid DEGTA and Its Complexation Behavior toward Trivalent Lanthanides and Actinides.

ABSTRACT: A new nonadentate ligand, DEGTA (diethylene glycol-bis(3-aminopropyl ether)-N,N,N',N'-tetraacetic acid), from the polyaminopolycarboxylate family, was synthesized in a two-step reaction. The ligand's pH-dependent behavior (structure and pK_a values) was determined by nuclear magnetic resonance (NMR) spectroscopy. The complexation ability of the ligand toward trivalent lanthanides and actinides was studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS) using Eu(III) and Cm(III) as representatives. For Eu(III), two species occurring at different pH values were observed and corroborated by concentration- and pD-dependent NMR-titration series, viz. [EuH₂(DEGTA)]⁺ and [Eu(DEGTA)]^-. The latter is show

SUBMITTER: Friedrich S 

PROVIDER: S-EPMC11920954 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature