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(ii) and Ni(ii). Multinuclear μ-O bridged U(vi), Cu(ii), and Ni(ii) complexes featuring bound diimino ligands were isolated.
National Security Directorate, Pacific Northwest National Laboratory, 902 Batelle Blvd, Richland, WA 99354, USA. marvin.warner@pnnl.gov.
Zachary C
ZC
Kennedy
Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, 902 Batelle Blvd, Richland, WA 99354, USA.
Allan Jay P
AJ
Cardenas
National Security Directorate, Pacific Northwest National Laboratory, 902 Batelle Blvd, Richland, WA 99354, USA. marvin.warner@pnnl.gov.
Jordan F
JF
Corbey
National Security Directorate, Pacific Northwest National Laboratory, 902 Batelle Blvd, Richland, WA 99354, USA. marvin.warner@pnnl.gov.
Marvin G
MG
Warner