Issue 33, 2007
From the journal:

Dalton Transactions

Coordination and structural studies of crowned-porphyrins†‡§

Zakaria Halime,ac   Mohammed Lachkar,c   Loïc Toupet,d   Athanassios G. Coutsolelosb  and  Bernard Boitrel*a  

* Corresponding authors

a Sciences Chimiques de Rennes, UMR CNRS 6226, Ingénierie Chimique et Molécules pour le Vivant, Rennes Cedex, France
E-mail: bernard.boitrel@univ-rennes1.fr
Fax: +33(2)2323 5637
Tel: +33(2)2323 5856

b University of Crete, Chemistry Department, Laboratory of BioInorganic Chemistry, PO Box 1470, 714 09 Heraklion, Crete, Greece
E-mail: coutsole@chemistry.uoc.gr

c Université Sidi Mohammed Ben Abdellah, Faculté des Sciences Dhar El Mehraz, Laboratoire d'Ingénierie des Matériaux Organométalliques et Moléculaires (LIMOM), B.P. 1796 (Atlas), 30000, Fès, Morocco
E-mail: mlachkar@caramail.com

d Université de Rennes1, Groupe Matière Condensée et Matériaux, UMR CNRS 6626, Rennes Cedex, France

Abstract

Simple chelating agents have been synthesized using a porphyrin and a covalently linked crown-ether. Depending on the relative spatial arrangement of both motifs, the resulting ligands, either a macrotricycle or bis-macrocycles, differ one from another by their flexibility or their aptitude to chelate bivalent or trivalent cations. The coordination chemistry as well as the structural study of these ligands and complexes are reported. In the particular case of the macrotricycle, the crown-ether motif, perpendicular to the porphyrin induces a side selectivity for the coordination of lead(II) outside the cavity. Furthermore, the coordination of zinc(II) implies a change of conformation of the ligand in which the crown-ether is parallel to the porphyrin.

Graphical abstract: Coordination and structural studies of crowned-porphyrins

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Article information

DOI
https://doi.org/10.1039/B701889D
Article type
Paper
Submitted
07 Feb 2007
Accepted
01 Jun 2007
First published
03 Jul 2007

Dalton Trans., 2007, 3684-3689

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Coordination and structural studies of crowned-porphyrins

Z. Halime, M. Lachkar, L. Toupet, A. G. Coutsolelos and B. Boitrel, Dalton Trans., 2007, 3684 DOI: 10.1039/B701889D

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