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

Antonio Doménech 1 Enrique García-España 1 Nicolas Bernier 2 Raphaël Tripier 2 Henri Handel 2
1 UV - Universitat de València
2 CEMCA - Chimie, Electrochimie Moléculaires et Chimie Analytique
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 CuII CuI and CuI CuI 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.
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Article dans une revue
Dalton Transactions, Royal Society of Chemistry, 2008, 〈10.1039/b718163a〉
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http://hal.univ-brest.fr/hal-01580422
Contributeur : Nicolas Renard <>
Soumis le : vendredi 1 septembre 2017 - 15:07:16
Dernière modification le : jeudi 5 avril 2018 - 18:16:02

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Antonio Doménech, Enrique García-España, Nicolas Bernier, Raphaël Tripier, Henri Handel. Electrochemically-driven conformational shift in mono- and di-copper constrained macrotricyclic cyclen receptors. Dalton Transactions, Royal Society of Chemistry, 2008, 〈10.1039/b718163a〉. 〈hal-01580422〉

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