2,6-Diiminopiperidin-1-ol: an overlooked motif relevant to uranyl and transition metal binding on poly(amidoxime) adsorbents

Glutardiamidoxime, a structural motif on sorbents used in uranium extraction from seawater, was discovered to cyclize in situ at room temperature to 2,6-diimino-piperidin-1-ol in the presence of uranyl nitrate. The new diimino motif was also generated when exposed to competing transition metals Cu(...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2016-07, Vol.52 (57), p.882-885
Main Authors: Kennedy, Zachary C, Cardenas, Allan Jay P, Corbey, Jordan F, Warner, Marvin G
Format: Article
Language:English
Subjects:
Adsorbents
Binding
Coordination Chemistry
Extraction
Ligands
Nitrates
Sea water
Transition metals
Uranium
Uranium Extraction
X-ray Crystallography
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Summary:Glutardiamidoxime, a structural motif on sorbents used in uranium extraction from seawater, was discovered to cyclize in situ at room temperature to 2,6-diimino-piperidin-1-ol in the presence of uranyl nitrate. The new diimino motif was also generated when exposed to competing transition metals Cu( ii ) and Ni( ii ). Multinuclear μ-O bridged U( vi ), Cu( ii ), and Ni( ii ) complexes featuring bound diimino ligands were isolated. We report a new cyclic diimino ligand resulting from glutardiamidoxime cyclization and associated multinuclear complexes with U( vi ), Cu( ii ), and Ni( ii ).
ISSN:1359-7345
1364-548X
DOI:10.1039/c6cc02488b