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

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

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 bridged by pyrazine ligands. Since the redox-active pyrazine 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.

Chromium, Coordination chemistry, Magnetic properties, Pyrazine, X-ray spectroscopy
0277-5387
248-253
Perlepe, Panagiota
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Oyarzabal, Itziar
ea164e05-da08-403d-9005-fd9be0b555ee
Pedersen, Kasper S.
707c12cb-eb52-40a4-9a33-214360f75e0e
Negrier, Philippe
b6c38204-4f9f-4cf2-a370-76f7682344da
Mondieig, Denise
6433fb4a-354d-4d6c-96e2-81a2ee17d31c
Rouzières, Mathieu
8c6cfe8b-afbe-4ab9-8c3c-65bf94056b4e
Hillard, Elizabeth A.
1e4b652b-a987-4862-ae50-0f934e08b9ab
Wilhelm, Fabrice
187d257f-ae45-496f-b69e-d6b925b267a6
Rogalev, Andrei
d920cbde-046d-4b96-b7e4-218d40465463
Suturina, Elizaveta A.
24dd007d-949a-4852-99d1-ea42b00103ef
Mathonière, Corine
b958a22b-3e7f-44d8-ab58-78b363319eb7
Clérac, Rodolphe
3bd1d496-4135-49b8-a78b-600a88cbccf5
Perlepe, Panagiota
8e7e43d8-3fed-407e-813d-13667949c8b6
Oyarzabal, Itziar
ea164e05-da08-403d-9005-fd9be0b555ee
Pedersen, Kasper S.
707c12cb-eb52-40a4-9a33-214360f75e0e
Negrier, Philippe
b6c38204-4f9f-4cf2-a370-76f7682344da
Mondieig, Denise
6433fb4a-354d-4d6c-96e2-81a2ee17d31c
Rouzières, Mathieu
8c6cfe8b-afbe-4ab9-8c3c-65bf94056b4e
Hillard, Elizabeth A.
1e4b652b-a987-4862-ae50-0f934e08b9ab
Wilhelm, Fabrice
187d257f-ae45-496f-b69e-d6b925b267a6
Rogalev, Andrei
d920cbde-046d-4b96-b7e4-218d40465463
Suturina, Elizaveta A.
24dd007d-949a-4852-99d1-ea42b00103ef
Mathonière, Corine
b958a22b-3e7f-44d8-ab58-78b363319eb7
Clérac, Rodolphe
3bd1d496-4135-49b8-a78b-600a88cbccf5

Perlepe, Panagiota, Oyarzabal, Itziar, Pedersen, Kasper S., Negrier, Philippe, Mondieig, Denise, Rouzières, Mathieu, Hillard, Elizabeth A., Wilhelm, Fabrice, Rogalev, Andrei, Suturina, Elizaveta A., Mathonière, Corine and Clérac, Rodolphe (2018) Cr(pyrazine)2(OSO2CH3)2: a two-dimensional coordination polymer with an antiferromagnetic ground state. Polyhedron, 153, 248-253. (doi:10.1016/j.poly.2018.07.011).

Record type: Article

Abstract

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 bridged by pyrazine ligands. Since the redox-active pyrazine 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.

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More information

Accepted/In Press date: 10 July 2018
e-pub ahead of print date: 18 July 2018
Published date: 1 October 2018
Keywords: Chromium, Coordination chemistry, Magnetic properties, Pyrazine, X-ray spectroscopy

Identifiers

Local EPrints ID: 425596
URI: https://eprints.soton.ac.uk/id/eprint/425596
ISSN: 0277-5387
PURE UUID: a656e492-ad95-497e-93f5-a2070958bd27

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Date deposited: 25 Oct 2018 16:30
Last modified: 25 Oct 2018 16:30

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Contributors

Author: Panagiota Perlepe
Author: Itziar Oyarzabal
Author: Kasper S. Pedersen
Author: Philippe Negrier
Author: Denise Mondieig
Author: Mathieu Rouzières
Author: Elizabeth A. Hillard
Author: Fabrice Wilhelm
Author: Andrei Rogalev
Author: Elizaveta A. Suturina
Author: Corine Mathonière
Author: Rodolphe Clérac

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