Issue 9, 2004
From the journal:

Dalton Transactions

Steric control of lanthanide hydration state: fast water exchange at gadolinium in a mono-amide ‘DOTA’ complex

Aileen Congreve,a   David Parker,*a   Eliana Gianoliob  and  Mauro Bottac  

* Corresponding authors

a Department of Chemistry, University of Durham, South Road, Durham, UK

b Dipartimento di Chimica IFM, Università degli Studi di Torino, via P. Giuria 7, 10125 Torino, Italy

c Dipartimento di Scienze dell'Ambiente è della Vita, Università del Piemonte Orientale “Amedeo Avogadro”, Piazza Ambrosoli 5, I-15100 Alessandria, Italy

Abstract

Detailed analyses of the solution structure and exchange dynamics of two sets of homologous mono-amide triacetate lanthanide complexes (Ln = Eu, Gd) of cyclen have been undertaken. The complex [LnL1], bearing an N-linked CH2CH2NHCO–pyridyl moiety, forms mono-aqua (q = 1) species in solution and the Gd complex undergoes rapid water exchange (kex = 11 × 107 s−1, 298 K) as a result of the steric destabilisation of the Ln–water binding interaction. The homologous complex with a C-3 spacing chain, [LnL2], forms a q = 0 species.

Graphical abstract: Steric control of lanthanide hydration state: fast water exchange at gadolinium in a mono-amide ‘DOTA’ complex

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Article information

DOI
https://doi.org/10.1039/B402230K
Article type
Paper
Submitted
12 Feb 2004
Accepted
22 Mar 2004
First published
05 Apr 2004

Dalton Trans., 2004, 1441-1445

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Steric control of lanthanide hydration state: fast water exchange at gadolinium in a mono-amide ‘DOTA’ complex

A. Congreve, D. Parker, E. Gianolio and M. Botta, Dalton Trans., 2004, 1441 DOI: 10.1039/B402230K

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