Uranyl–lanthanide heterometallic assemblies with 1,2-ethanedisulfonate and cucurbit[6]uril ligands
- 16 March 2012
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in CrystEngComm
- Vol. 14 (10), 3363-3366
- https://doi.org/10.1039/c2ce25091h
Abstract
The reaction of uranyl and lanthanide (Nd, Dy, Er, Yb) nitrates with 1,2-ethanedisulfonate (EDS2−) and cucurbit[6]uril (CB6) under hydrothermal conditions gave the heterometallic complexes [(UO2)4Nd2(EDS)4(OH)4(CB6)(H2O)16]·2NO3·8H2O (1) and [(UO2)2Ln1.5(EDS)2(OH)2(NO3)1.5(CB6)(H2O)7.5][(UO2)2(EDS)-(OH)2(H2O)4]·NO3·5.5H2O with Ln = Dy (2), Er (3) and Yb (4), which have been crystallographically characterized. In all these complexes, one EDS2− ligand is bound to one uranyl and one lanthanide ion through its two monodentate sulfonate groups; the uranyl ion is further part of a bis(hydroxide)-bridged dinuclear unit, while the lanthanide ion is complexed by a CB6 molecule. Ribbon-like one-dimensional assemblies are formed in all cases, with complexes 2–4 differing from 1 by the presence of an additional [(UO2)2(EDS)(OH)2(H2O)4] neutral polymeric chain hydrogen bonded to the mixed species.Keywords
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