Issue 45, 2006
From the journal:

Dalton Transactions

Synthesis and characterisation of dimeric eight-coordinate lanthanide(iii) complexes of a macrocyclic tribenzylphosphinate ligand

Kanthi Senanayake,a   Amber L. Thompson,a   Judith A. K. Howard,a   Mauro Bottab  and  David Parker*a  

* Corresponding authors

a Department of Chemistry, Durham University, South Road, Durham, UK
E-mail: david.parker@durham.ac.uk

b Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale “Amedeo Avogadro”, Via Bellini 25/G, Alessandria, Italy

Abstract

The macrocyclic ligand 1,4,7,10-tetraazacyclododecane-1,4,7-triyl(methylenebenzyl-phosphinic acid) H3L3, has been prepared and its complexes with Eu, Gd and Tb(III) studied by NMR, relaxometry, luminescence and single crystal X-ray crystallography. In solution and in the crystal, the complexes have eight-coordinate metal centres with bridging phosphinate groups linking the two twisted square antiprismatic coordination polyhedra. A single stereoisomer crystallises from solution with an RRR and SSS configuration at the P centres in each sub-unit. The relaxivity of [GdL3]2 is low (1.9 mM−1 s−1, 298 K, 20 MHz), consistent with the absence of any proximate water molecules. The terbium dimer possesses a relatively long excited state lifetime (2.47 ms, 298 K).

Graphical abstract: Synthesis and characterisation of dimeric eight-coordinate lanthanide(iii) complexes of a macrocyclic tribenzylphosphinate ligand

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/B612189F
Article type
Paper
Submitted
24 Aug 2006
Accepted
22 Sep 2006
First published
29 Sep 2006

Dalton Trans., 2006, 5423-5428

Permissions

Request permissions

Synthesis and characterisation of dimeric eight-coordinate lanthanide(III) complexes of a macrocyclic tribenzylphosphinate ligand

K. Senanayake, A. L. Thompson, J. A. K. Howard, M. Botta and D. Parker, Dalton Trans., 2006, 5423 DOI: 10.1039/B612189F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements