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Lanthanide contraction effect and organic additive impact the coordination structures of lanthanide ions with symmetrical octamethyl-substituted cucurbit[6]uril ligand

Abstract

The reaction of symmetrical octamethyl-substituted cucurbit[6]uril (OMeQ[6]) with lanthanide ions (La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Dy3+ and Ho3+) under aqueous solution of hydrochloric acid in the presence of CdCl2 afforded nine coordination compounds (1–9) , which were classified as three different types. The X-ray crystallography of these nine coordination compounds reveals an interesting structural change, which can be attributed to the lanthanide contraction effect. In addition, the reaction of OMeQ[6] with Ho3+ in the presence of hydroquinone led to the compound 10, in which the OMeQ[6] successfully coordinated with Ho3+ ions due to the bridge role of the organic additive hydroquinone.

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Publication details

The article was received on 26 May 2019, accepted on 08 Aug 2019 and first published on 09 Aug 2019


Article type: Paper
DOI: 10.1039/C9CE00812H
CrystEngComm, 2019, Accepted Manuscript

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    Lanthanide contraction effect and organic additive impact the coordination structures of lanthanide ions with symmetrical octamethyl-substituted cucurbit[6]uril ligand

    J. Liu, R. L. Lin, J. Zhou, F. Zhou, W. sun and K. Chen, CrystEngComm, 2019, Accepted Manuscript , DOI: 10.1039/C9CE00812H

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