Long-Distance Magnetic Interaction of Exchange-Coupled Copper Dimers with Nitronyl Nitroxide and tert-Butyl Nitroxide Radicals

Publication type:
Journal article
Metadata:
Autoren
  • Martin Jung
  • Ajay Sharma
  • Dariush Hinderberger
  • Sebastian Braun
  • Ulrich Schatzschneider
  • Eva Rentschler
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000268174800033&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1021/ic9006857
eISSN
1520-510X
Externe Identifier
  • Clarivate Analytics Document Solution ID: 473AG
  • PubMed Identifier: 19722693
ISSN
0020-1669
Ausgabe der Veröffentlichung
15
Zeitschrift
INORGANIC CHEMISTRY
Paginierung
7244 - 7250
Datum der Veröffentlichung
2009
Status
Published
Titel
Long-Distance Magnetic Interaction of Exchange-Coupled Copper Dimers with Nitronyl Nitroxide and <i>tert</i>-Butyl Nitroxide Radicals
Sub types
  • Article
Ausgabe der Zeitschrift
48

Data source: Web of Science (Lite)

Other metadata sources:
Autoren
  • Martin Jung
  • Ajay Sharma
  • Dariush Hinderberger
  • Sebastian Braun
  • Ulrich Schatzschneider
  • Eva Rentschler
DOI
10.1021/ic9006857
eISSN
1520-510X
ISSN
0020-1669
Ausgabe der Veröffentlichung
15
Zeitschrift
Inorganic Chemistry
Sprache
en
Online publication date
2009
Paginierung
7244 - 7250
Datum der Veröffentlichung
2009
Status
Published
Herausgeber
American Chemical Society (ACS)
Herausgeber URL
http://dx.doi.org/10.1021/ic9006857
Datum der Datenerfassung
2023
Titel
Long-Distance Magnetic Interaction of Exchange-Coupled Copper Dimers with Nitronyl Nitroxide and <i>tert</i>-Butyl Nitroxide Radicals
Ausgabe der Zeitschrift
48

Data source: Crossref

Abstract
To study long-distance magnetic interactions between exchange-coupled metal centers and coordinated radical moieties, two new homodimetallic Cu(II) complexes held together by the chelating ligand L(nPr) = N,N,N',N'-tetrakis(N-propyl-2-benzimidazolyl)-2-hydroxy-1,3-diaminopropane and additionally bridged by either a nitronyl nitroxide (NIT) or a tert-butyl nitroxide (NOA) radical-substituted benzoate have been prepared. The complexes have been investigated by X-ray crystallography, magnetic susceptibility measurements, electron paramagnetic resonance (EPR) spectroscopy, and density functional theory (DFT) calculations. For comparison additionally the related copper dimer with the bridging diamagnetic nitrobenzoate ligand was investigated. Magnetic susceptibility measurements on powdered samples reveal a ferromagnetic interaction between the copper ions of J(Cu-Cu) = +28 cm(-1) for all three compounds. The NIT-bridged dimer additionally shows a metal-radical interaction of J'(Cu-NIT) = -2.3 cm(-1) while in the case of the NOA radical, the coupling becomes weakly ferromagnetic with J'(Cu-NOA) = +1.1 cm(-1). This contrasting behavior is explained by the different effective spin-polarization mechanism present. The magnetic data that show for the first time a significant long distance exchange interaction between a peripheral radical unit and a metal dimer were confirmed by EPR spectroscopy and DFT calculations.
Addresses
  • Institut für Anorganische Chemie und Analytische Chemie, Johannes-Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
Autoren
  • Martin Jung
  • Ajay Sharma
  • Dariush Hinderberger
  • Sebastian Braun
  • Ulrich Schatzschneider
  • Eva Rentschler
DOI
10.1021/ic9006857
eISSN
1520-510X
Externe Identifier
  • PubMed Identifier: 19722693
Open access
false
ISSN
0020-1669
Ausgabe der Veröffentlichung
15
Zeitschrift
Inorganic chemistry
Sprache
eng
Medium
Print
Paginierung
7244 - 7250
Datum der Veröffentlichung
2009
Status
Published
Datum der Datenerfassung
2009
Titel
Long-distance magnetic interaction of exchange-coupled copper dimers with nitronyl nitroxide and tert-butyl nitroxide radicals.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
48

Data source: Europe PubMed Central

Abstract
To study long-distance magnetic interactions between exchange-coupled metal centers and coordinated radical moieties, two new homodimetallic Cu(II) complexes held together by the chelating ligand L(nPr) = N,N,N',N'-tetrakis(N-propyl-2-benzimidazolyl)-2-hydroxy-1,3-diaminopropane and additionally bridged by either a nitronyl nitroxide (NIT) or a tert-butyl nitroxide (NOA) radical-substituted benzoate have been prepared. The complexes have been investigated by X-ray crystallography, magnetic susceptibility measurements, electron paramagnetic resonance (EPR) spectroscopy, and density functional theory (DFT) calculations. For comparison additionally the related copper dimer with the bridging diamagnetic nitrobenzoate ligand was investigated. Magnetic susceptibility measurements on powdered samples reveal a ferromagnetic interaction between the copper ions of J(Cu-Cu) = +28 cm(-1) for all three compounds. The NIT-bridged dimer additionally shows a metal-radical interaction of J'(Cu-NIT) = -2.3 cm(-1) while in the case of the NOA radical, the coupling becomes weakly ferromagnetic with J'(Cu-NOA) = +1.1 cm(-1). This contrasting behavior is explained by the different effective spin-polarization mechanism present. The magnetic data that show for the first time a significant long distance exchange interaction between a peripheral radical unit and a metal dimer were confirmed by EPR spectroscopy and DFT calculations.
Autoren
  • Martin Jung
  • Ajay Sharma
  • Dariush Hinderberger
  • Sebastian Braun
  • Ulrich Schatzschneider
  • Eva Rentschler
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/19722693
DOI
10.1021/ic9006857
eISSN
1520-510X
Ausgabe der Veröffentlichung
15
Zeitschrift
Inorg Chem
Sprache
eng
Country
United States
Paginierung
7244 - 7250
Datum der Veröffentlichung
2009
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2009
Titel
Long-distance magnetic interaction of exchange-coupled copper dimers with nitronyl nitroxide and tert-butyl nitroxide radicals.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
48

Data source: PubMed

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