Radioactive element chemistry and processing
Peer reviewed
Abstract
Abstract
Abstract We report the synthesis and evaluation of two CHON-compliant 4,7-dimethoxy-1,10-phenanthroline-2,9-dicarboxamide (DADOMePhen) ligands: an aromatic variant, Et-Tol-DADOMePhen (1), and an aliphatic analogue, TCH-DADOMePhen (2). Solvent extraction under SANEX conditions shows that ligand 1 has good Am/Eu selectivity in an optimal window of 0.1–0.5 M HNO3, achieving a maximum SFAm/Eu of 108.2 at 0.5 M HNO3, the highest reported for a lipophilic ligand of pure DAPhen-type molecular architecture to date. This performance inverts conventional acidity dependence: electron-donating methoxy substituents enhance metal–ligand covalency at low acidity but make the ligand susceptible to protonation at higher concentrations. Coordination and fluorescence studies indicate a 1:2 metal-to-ligand stoichiometry; single-crystal diffraction reveals the structure of ligand 1. Quantum-chemical calculations establish that methoxy groups tune electrostatic potential and frontier orbitals, strengthening bonding relative to parent Et-Tol-DAPhen. Beyond Am/Eu partitioning, ligand 1 may enable actinide/neptunium separations: at 0.1 M HNO3, calculated SFAm/Np, SFPu/Np, SFU/Np, and SFTh/Np reach 436, 1690, 9766, and 1953, respectively, reflecting mismatch between the dioxo Np(V) monocation and the ligand. This work establishes 4,7-methoxy derivatization as a design strategy to tune DAPhen-based extractant selectivity and introduces a ligand that could be useful for specialized low-acidity actinide/neptunium or lanthanide separations.
Direct answer
What can I do from this paper page?
Use this page to scan "Tuned 4,7-Methoxy-Derivatized DAPhen Ligands with Enhanced Selectivity for Am/Eu and An/Np Separations" quickly: start with the summary and abstract, then check the authors, source, topics, and related papers. From here, open Scollr to follow Radioactive element chemistry and processing research, save the paper, or map adjacent work.
Research areas
Follow related topics
Citation
BibTeX
@article{Zhang2026Tuned,
title = {Tuned 4,7-Methoxy-Derivatized DAPhen Ligands with Enhanced Selectivity for Am/Eu and An/Np Separations},
author = {Shi Lin Zhang and Lu Yu and Yong Qiang Wan and Yangyang Zhang and Huai Xin Hao and Zhi Peng Wang and John F. Gallagher and Jun Li and Pavle Mocilac},
journal = {Inorganic Chemistry},
year = {2026},
doi = {10.1021/acs.inorgchem.6c03342},
url = {https://doi.org/10.1021/acs.inorgchem.6c03342}
}FAQ
Using this paper in a discovery workflow
How do I find related work for this paper?
Use the related papers and topic links on this page as starting points. In Scollr, you can also open the paper and build a literature map around its references, citing papers, and related work.
How can I keep up with new Radioactive element chemistry and processing research papers?
Follow Radioactive element chemistry and processing research in Scollr. New papers from the topic flow into a personalized feed, and you can save useful studies to revisit later.
Can I cite this paper from this page?
This page includes a static BibTeX block for Tuned 4,7-Methoxy-Derivatized DAPhen Ligands with Enhanced Selectivity for Am/Eu and An/Np Separations. Always verify the DOI, source, and publication details against the publisher record before submitting a manuscript.
Follow this research in Scollr
Follow the topics and authors behind this paper, save useful studies, and build a literature map when you are ready to go deeper.
Get the app