Journal Article

FZJ-2026-03148

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png PPTMP: An Asymmetric Tetradentate Ligand for Trivalent Lanthanide/Actinide Separation in Nuclear Waste Management

Greif, G. ; Sauerwein, F. S.FZJ* ; Sittel, T. ; Baruth, G. ; Floethe, T. ; Wilden, A.FZJ* ; Modolo, G.FZJ* ; Panak, P. J. ; Roesky, P. W. (Corresponding author)

2026
American Chemical Society Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.inorgchem.6c01055

Abstract: This work presents a new type of asymmetric tetradentate N-donor ligand, (4-(6-(1,10-phenanthrolin-2-yl)pyridin-2-yl)-1H-1,2,3-triazol-1-yl)methyl pivalate (PPTMP), designed for the separation of trivalent actinides and lanthanides in nuclear waste management. Solvent extraction studies show that Am(III)/Eu(III) separation is achieved at low nitric acid concentrations, demonstrating the viability of this novel ligand type. The coordination chemistry of the ligand with Ln(III) and An(III) ions was investigated using X-ray diffraction (XRD) as well as nuclear magnetic resonance (NMR) spectroscopy, time-resolved laser fluorescence spectroscopy (TRLFS) and absorption spectroscopy (UV/vis). These methods show the formation of 1:1 and 1:2 complexes in different media, providing insight into the molecular mechanisms of f-element separation and highlighting the need for improved ligand design in nuclear waste management.

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Contributing Institute(s):

1. Nukleare Entsorgung (IFN-2)

Research Program(s):

1. 1412 - Predisposal (POF4-141) (POF4-141)
2. Verbundprojekt f-Char: Spektroskopische Charakterisierung von f-Element-Komplexen mit soft donor-Liganden, Teilprojekt D (02NUK059D) (02NUK059D)
3. BMBF 02NUK059D - Spektroskopische Charakterisierung von f-Element-Komplexen mit soft donor-Liganden (f-Char) (BMBF-02NUK059D) (BMBF-02NUK059D)
4. BMFTR-02NUK103B - Verbundprojekt COORDEX: Koordinations- und Extraktionschemie von f-Elementen mit weichen Donorliganden, Teilprojekt B (BMFTR-02NUK103B) (BMFTR-02NUK103B)

Appears in the scientific report 2026

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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