PERLEPE, Panagiota; OYARZABAL, Itziar; PEDERSEN, Kasper; NÉGRIER, Philippe; MONDIEIG, Denise; ROUZIERES, Mathieu; HILLARD, Elizabeth; WILHELM, Fabrice; ROGALEV, Andrei; SUTURINA, Elizaveta; MATHONIÈRE, Corine; CLÉRAC, Rodolphe

doi:10.1016/j.poly.2018.07.011

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http://creativecommons.org/licenses/by-nc-sa/

PERLEPE, Panagiota
Centre de Recherche Paul Pascal [CRPP]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

OYARZABAL, Itziar
Centre de Recherche Paul Pascal [CRPP]

PEDERSEN, Kasper
Danmarks Tekniske Universitet = Technical University of Denmark [DTU]

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Article de revue

Ce document a été publié dans

Polyhedron. 2018-10-01, vol. 153, p. 248-253

Elsevier

Résumé en anglais

A novel two-dimensional (2D) coordination polymer with the formula Cr(pyrazine)2(OSO2CH3)2 has been synthesized and characterized. Powder X-ray diffraction data reveal that this material, which crystalizes in the Pnnm orthorhombic space group, is composed of rectangular grid layers with octahedral CrN4O2 nodes and pyrazine vertices. Since the redox-active pyrazine ligand can be reduced in the presence of transition metals, X-ray absorption spectroscopy and quantum chemical calculations were used to confirm the +II oxidation state of the Cr center. Magnetic susceptibility measurements indicate the presence of antiferromagnetic interactions between the chromium(II) centers through the neutral pyrazine and suggest an antiferromagnetic ordered state below TN ≈ 10 K, which was confirmed by heat-capacity measurements.< Réduire

Mots clés en anglais

Pyrazine

Chromium

Magnetic order

Coordination polymer

Magnetic properties

X-ray spectroscopy

Coordination chemistry

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Cr(pyrazine)2(OSO2CH3)2: A two-dimensional coordination polymer with an antiferromagnetic ground state

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Résumé en anglais

Mots clés en anglais

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