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Issue 24, 2008
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Electrochemically-driven conformational shift in mono- and di-copper constrained macrotricyclic cyclen receptors

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Abstract

An electrochemical study of mono- and di-copper constrained cyclen macrotricycles is presented. Electrochemical data in DMF solution indicate that the reduction of dinuclear complexes occurs in two steps in the −0.4 to −0.8 V vs.AgCl/Ag potential range yielding CuIICuI and CuICuI species further reduced to Cu metal at highly negative potentials. Mononuclear complexes are reduced in two steps to CuI and Cu metal. Electrochemical data suggest that reduction of both mononuclear and dinuclear complexes approach a square scheme involving electrochemically-driven conformational shifts for metal ions. The presence of endo- and exo-forms of the complexes are revealed by changes in the electrochemical response of the complexes in the presence of tetraethylammonium chloride, 1-azabicyclo[2.2.2]octane and diazabicyclo[2.2.2]octane competing ligands.

Graphical abstract: Electrochemically-driven conformational shift in mono- and di-copper constrained macrotricyclic cyclen receptors

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Publication details

The article was received on 23 Nov 2007, accepted on 17 Mar 2008 and first published on 30 Apr 2008


Article type: Paper
DOI: 10.1039/B718163A
Dalton Trans., 2008, 3169-3177

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    Electrochemically-driven conformational shift in mono- and di-copper constrained macrotricyclic cyclen receptors

    A. Doménech, E. García-España, N. Bernier, R. Tripier and H. Handel, Dalton Trans., 2008, 3169
    DOI: 10.1039/B718163A

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