Issue 14, 2002

A study on the heterodinuclear cryptates [LnCuL(DMF)](ClO4)2·MeCN (Ln = Gd, Eu, Tb, Dy, Y) — synthesis, characterization, magnetic and electrochemical properties

Abstract

Five heterodinuclear cryptates [LnCuL(DMF)](ClO4)2·MeCN (Ln = Gd, Eu, Tb, Dy, Y) were synthesized (L represents the deprotonated anionic cryptand obtained by condensation of tris(2-aminoethyl)amine with 2,6-diformyl-4-chlorophenol). The ES-MS spectra of five cryptates showed that the Ln(III)–Cu(II) cores are very stable in solution. The crystal structure of [EuCuL(DMF)](ClO4)2 was determined and was compared with those of mono- and hetero-nuclear copper(II) with the same ligand. The Gd(III)–Cu(II) cryptate displayed weaker intramolecular ferromagnetic interactions than the complexes with two phenolate bridges. The E1/2 values of Cu(II)/Cu(I) were influenced by Ln(III) in the cryptates and shifted negatively comparing with free Cu2+. The degree of negative-shift is in the order: Dy > Tb > Gd > Eu.

Graphical abstract: A study on the heterodinuclear cryptates [LnCuL(DMF)](ClO4)2·MeCN (Ln = Gd, Eu, Tb, Dy, Y) — synthesis, characterization, magnetic and electrochemical properties

Supplementary files

Article information

Article type
Paper
Submitted
25 Feb 2002
Accepted
02 May 2002
First published
06 Jun 2002

J. Chem. Soc., Dalton Trans., 2002, 2873-2878

A study on the heterodinuclear cryptates [LnCuL(DMF)](ClO4)2·MeCN (Ln = Gd, Eu, Tb, Dy, Y) — synthesis, characterization, magnetic and electrochemical properties

Q. Chen, Q. Luo, D. Fu and J. Chen, J. Chem. Soc., Dalton Trans., 2002, 2873 DOI: 10.1039/B201970A

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