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 ยต-O bridged U(VI), Cu(II), and Ni(II) complexes featuring bound diimino ligands were isolated. A Cu(II) complex with the historically relevant cyclic imide dioxime motif is also reported for structural comparison to the reported diimino complexes.
Revised: August 23, 2016 |
Published: June 6, 2016
Citation
Kennedy Z.C., A.J. Cardenas, J.F. Corbey, and M.G. Warner. 2016.2,6-Diiminopiperidin-1-ol: an overlooked motif relevant to uranyl and transition metal binding on poly(amidoxime) adsorbents.Chemical Communications 52, no. 57:8802-8805.PNNL-SA-117149.doi:10.1039/c6cc02488b