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Aggregation of Rare Earth Coordination Complexes in Solution Studied by Paramagnetic and DOSY NMR

Poh, Adeline; Aguilar, Juan; Kenwright, Alan; Mason, Kevin; Parker, David

Aggregation of Rare Earth Coordination Complexes in Solution Studied by Paramagnetic and DOSY NMR Thumbnail


Authors

Adeline Poh

Juan Aguilar

Alan Kenwright

Kevin Mason

David Parker



Abstract

The degree of aggregation of neutral, 9‐coordinate rare earth coordination complexes has been shown to affect their ligand field, as revealed by diffusion‐ordered NMR spectroscopy (DOSY‐NMR) measurements on Y(III) complexes, paramagnetic NMR analyses of Yb and Tb analogues and emission spectral studies with the EuIII systems. In non‐polar media a lipophilic tris‐isopropyl complex, [Ln.L2] tends to aggregate in chloroform and dichloromethane giving rise to oligomers, whereas in acetic and trifluoroacetic acid the more polar parent complex, [Ln.L1], also aggregates, profoundly affecting the pseudocontact shift and the form of the Eu emission spectrum. Such behaviour has important implications in the design of responsive spectral probes.

Citation

Poh, A., Aguilar, J., Kenwright, A., Mason, K., & Parker, D. (2018). Aggregation of Rare Earth Coordination Complexes in Solution Studied by Paramagnetic and DOSY NMR. Chemistry - A European Journal, 24(60), 16170-16175. https://doi.org/10.1002/chem.201803766

Journal Article Type Article
Acceptance Date Jul 23, 2018
Online Publication Date Aug 30, 2018
Publication Date Aug 30, 2018
Deposit Date Sep 10, 2018
Publicly Available Date Aug 30, 2019
Journal Chemistry - A European Journal
Print ISSN 0947-6539
Electronic ISSN 1521-3765
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 24
Issue 60
Pages 16170-16175
DOI https://doi.org/10.1002/chem.201803766
Public URL https://durham-repository.worktribe.com/output/1320313

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Copyright Statement
This is the accepted version of the following article: Poh, Adeline, Aguilar, Juan, Kenwright, Alan, Mason, Kevin & Parker, David (2018). Aggregation of Rare Earth Coordination Complexes in Solution Studied by Paramagnetic and DOSY NMR. Chemistry - A European Journal 24(60): 16170-16175 which has been published in final form at https://doi.org/10.1002/chem.201803766. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.





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