Uranyl ion complexes with long chain aminoalcoholbis(phenolate) [O,N,O,O′] donor ligands |
| |
Authors: | Harri Sopo Ari VäisänenReijo Sillanpää |
| |
Institution: | Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyvaskyla, Finland |
| |
Abstract: | The reaction between uranyl nitrate hexahydrate and phenolic ligand precursor (N,N-bis(2-hydroxy-3,5-dimethylbenzyl)-4-amino-1-butanol) · HCl], H3L1 · HCl, leads to a uranyl complex UO2(H2L1)2] (1a) and UO2(H2L1)2] · 2CH3CN (1b). The ligand (N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-4-amino-1-butanol)H3L2 · HCl], H3L2 · HCl, yields a uranyl complex with a formula UO2(H2L2)2] · CH3CN (2). The ligand (N,N-bis(2-hydroxy-3,5-dimethylbenzyl)-5-amino-1-pentanol) · HCl], H3L3 · HCl, produces a uranyl complex with a formula UO2(H2L3)2] · 2CH3CN (3) and the ligand (N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-5-amino-1-pentanol) · HCl], H3L4 · HCl, leads to a uranyl complex with a formula UO2(H2L4)2] · 2CH3CN (4). The ligand (N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-6-amino-1-hexanol) · HCl], H3L5 · HCl, leads to a uranyl complex with a formula UO2(H2L5)2] · 4toluene (5). The complexes 1–5 are obtained using a molar ratio of 1:2 (U to L) in the presence of a base (triethylamine). The molecular structures of 1a, 1b, 3, 4 and 5 were verified by X-ray crystallography. All complexes are neutral zwitterions and have similar centrosymmetric, mononuclear, distorted octahedral uranyl structures with the four coordinating phenoxo ligands in an equatorial plane. In uranyl ion extraction studies from water to dichloromethane with ligands H3L1 · HCl–H3L5 · HCl, ligands H3L1 · HCl, H3L4 · HCl and H3L5 · HCl are the most effective ones. |
| |
Keywords: | Uranyl ion Uranyl ion extraction Crystal structures NMR studies Phenolate ligands |
本文献已被 ScienceDirect 等数据库收录! |
|