VALENTÍN-PÉREZ, Ángela; NAÏM, Ahmad; HILLARD, Elisabeth A.; ROSA, Patrick; CORTIJO, Miguel

doi:10.3390/polym10030311

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VALENTÍN-PÉREZ, Ángela
Centre de Recherche Paul Pascal [CRPP]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

NAÏM, Ahmad
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

HILLARD, Elisabeth A.
Centre de Recherche Paul Pascal [CRPP]

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Article de revue

Ce document a été publié dans

Polymers. 2018, vol. 10, n° 3, p. 311

MDPI

Résumé en anglais

Herein, we report the preparation of chiral, one-dimensional coordination polymers based on trinuclear paddlewheel helices [M3(dpa)4]2+ (M = Co(II) and Ni(II); dpa = the anion of 2,2′-dipyridylamine). Enantiomeric resolution of a racemic mixture of [M3(dpa)4]2+ complexes was achieved by chiral recognition of the respective enantiomer by [Δ-As2(tartrate)2]2− or [Λ-As2(tartrate)2]2− in N,N-dimethylformamide (DMF), affording crystalline coordination polymers formed from [(Δ-Co3(dpa)4)(Λ-As2(tartrate)2)]·3DMF (Δ-1), [(Λ-Co3(dpa)4)(Δ-As2(tartrate)2)]·3DMF (Λ-1), [(Δ-Ni3(dpa)4)(Λ-As2(tartrate)2)]·(4 − n)DMF∙nEt2O (Δ-2) or [(Λ-Ni3(dpa)4)(Δ-As2(tartrate)2)]·(4 − n)DMF∙nEt2O (Λ-2) repeating units. UV-visible circular dichroism spectra of the complexes in DMF solutions demonstrate the efficient isolation of optically active species. The helicoidal [M3(dpa)4]2+ units that were obtained display high stability towards racemization as shown by the absence of an evolution of the dichroic signals after several days at room temperature and only a small decrease of the signal after 3 h at 80 °C.< Réduire

Mots clés en anglais

Circular dichroism

X-ray crystallography

Extended metal atom chains

Enantiomeric resolution

Chiral coordination polymers

chiral coordination polymers

enantiomeric resolution

extended metal atom chains

circular dichroism

DOI

http://dx.doi.org/10.3390/polym10030311

Projet Européen

European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 706556 CHIMMM ( the ANR project CHIROTS ANR-11-JS07-013-01 (Patrick Rosa, PhD fellowship for Ahmad Naim).

Project ANR

Synthèse, caractérisation et mesures Optiques sur composés CHIRaux à Transition de Spin - ANR-11-JS07-0013

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026