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Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
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JoVE Journal Chemistry
Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow

Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow

DOI:
10.3791/51548-v

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10:34 min

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April 24, 2014

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, , , ,
1Chemistry Institute,The Hebrew University of Jerusalem, 2Biological Chemistry Department,Ariel University, 3Chemistry Department, Faculty of Exact Science,Bar Ilan University, 4Chemistry Department,Ben-Gurion University

Chapters

  • 00:05Title
  • 02:02Preparing Carbon Samples
  • 04:29Loading EPR 3 mm Quartz Tubes and Setting Up the Flow System
  • 06:09EPR Measurement
  • 07:10Results: Characterization of Carbon Radicals via EPR Measurements of Coal Samples
  • 09:33Conclusion

Summary

Automatic Translation

Automatic Translation

Stable radicals that are present in carbon substrates interact with paramagnetic oxygen through a Heisenberg spin exchange. This interaction can be significantly reduced under STP conditions by flowing a diamagnetic gas over the carbon system. This manuscript describes a simple method to characterize the nature of those radicals.

Tags

Carbon RadicalsElectron Paramagnetic ResonanceEPROxidationCarbon StructureHeisenberg Spin ExchangeMolecular OxygenDiamagnetic GasMacropore System

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