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

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

doi:10.1016/j.poly.2018.07.011

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

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

13 Citations (SciVal)

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 T_N ≈ 10 K, which was confirmed by heat-capacity measurements.

Original language	English
Pages (from-to)	248-253
Number of pages	6
Journal	Polyhedron
Volume	153
Early online date	18 Jul 2018
DOIs	https://doi.org/10.1016/j.poly.2018.07.011
Publication status	Published - 1 Oct 2018

Keywords

Chromium
Coordination chemistry
Magnetic properties
Pyrazine
X-ray spectroscopy

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.poly.2018.07.011

Cite this

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

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.",

keywords = "Chromium, Coordination chemistry, Magnetic properties, Pyrazine, X-ray spectroscopy",

author = "Panagiota Perlepe and Itziar Oyarzabal and Pedersen, {Kasper S.} and Philippe Negrier and Denise Mondieig and Mathieu Rouzi{\`e}res and Hillard, {Elizabeth A.} and Fabrice Wilhelm and Andrei Rogalev and Suturina, {Elizaveta A.} and Corine Mathoni{\`e}re and Rodolphe Cl{\'e}rac",

year = "2018",

month = oct,

day = "1",

doi = "10.1016/j.poly.2018.07.011",

language = "English",

volume = "153",

pages = "248--253",

journal = "Polyhedron",

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T1 - Cr(pyrazine)2(OSO2CH3)2

T2 - A two-dimensional coordination polymer with an antiferromagnetic ground state

AU - Perlepe, Panagiota

AU - Oyarzabal, Itziar

AU - Pedersen, Kasper S.

AU - Negrier, Philippe

AU - Mondieig, Denise

AU - Rouzières, Mathieu

AU - Hillard, Elizabeth A.

AU - Wilhelm, Fabrice

AU - Rogalev, Andrei

AU - Suturina, Elizaveta A.

AU - Mathonière, Corine

AU - Clérac, Rodolphe

PY - 2018/10/1

Y1 - 2018/10/1

N2 - 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.

AB - 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.

KW - Chromium

KW - Coordination chemistry

KW - Magnetic properties

KW - Pyrazine

KW - X-ray spectroscopy

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DO - 10.1016/j.poly.2018.07.011

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JO - Polyhedron

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