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Issue 30, 2019
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Water exchange in lanthanide complexes for MRI applications. Lessons learned over the last 25 years

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Abstract

The water exchange rates of water molecules coordinated to the metal ion in lanthanide complexes have been profusely investigated during the last 25 years, especially in the case of Gd3+ and Eu3+ complexes. This is mainly related to the important application of some Gd3+ complexes as contrast agents in magnetic resonance imaging (MRI), and the intensive investigation of Eu3+ complexes as contrast agent candidates providing contrast through the chemical exchange saturation transfer mechanism (CEST). Both applications require a fine tunning of the exchange rate of the coordinated water molecule to yield optimal response. Herein we review the progress made in this field to control water exchange in a rational way through ligand design, providing relationships between the observed trends, the structures of the complexes and the mechanisms responsible for the water exchange reaction.

Graphical abstract: Water exchange in lanthanide complexes for MRI applications. Lessons learned over the last 25 years

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Publication details

The article was received on 10 May 2019, accepted on 18 Jun 2019 and first published on 19 Jun 2019


Article type: Perspective
DOI: 10.1039/C9DT01948K
Dalton Trans., 2019,48, 11161-11180

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    Water exchange in lanthanide complexes for MRI applications. Lessons learned over the last 25 years

    P. Caravan, D. Esteban-Gómez, A. Rodríguez-Rodríguez and C. Platas-Iglesias, Dalton Trans., 2019, 48, 11161
    DOI: 10.1039/C9DT01948K

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