In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2018, No. 10 ( 2018-03-14), p. 1185-1191
Abstract:
A pair of uranyl complexes incorporating tetrahydrosalen and N , N ‐dimethyltetrahydrosalen ligands are synthesized and studied. These new ligands, with saturated secondary and tertiary amines, exhibit higher chemostability than the prototype Schiff base (salen) structure, especially under acidic conditions. As shown by X‐ray diffraction crystallography, the coordination geometry of uranium in these new complexes is a distorted pentagonal bipyramid. Interestingly, UO 2 ([H 4 ]‐salen), comprising the tetrahydrosalen ligand, forms a dimeric structure in the crystals, with two subunits held together by sharing one of the two phenoxy oxygen atoms from each subunit, whereas UO 2 ([H 2 Me 2 ]‐salen) with the N , N ‐dimethyltetrahydrosalen ligand is in the monomer state, with a solvent molecule coordinated to uranium to complete the penta‐coordination configuration. Moreover, as revealed by UV/Vis spectroscopy using the colorimetry method, these hydrogenated salen ligands exhibit comparable, or even higher, binding affinities toward uranyl than the prototype Schiff base salen ligand in weakly basic solution.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2018.10
DOI:
10.1002/ejic.201701401
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
1475009-0
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