PL EN


Preferences help
enabled [disable] Abstract
Number of results
Journal
2012 | 10 | 1 | 166-171
Article title

Interaction between magnetic agglomerates and an extended free radicals network studied by magnetic resonance

Content
Title variants
Languages of publication
EN
Abstracts
EN
Solids containing an extended network of free radicals have been prepared and studied by magnetic resonance techniques in the 4–290 K temperature range. One solid contained additionally a small amount of magnetic γ-Fe2O3 in the form of nanoparticle agglomerates. The solid without agglomerates displayed only a narrow, single resonance line centered at g
eff = 2.0043. The magnetic resonance measurements of the solid with γ-Fe2O3 agglomerates gave a spectrum composed of two lines attributed to two different magnetic centers: a narrow line due to free radicals and a broad line arising from magnetic iron oxide agglomerates. In the high temperature range the integrated intensities of both lines decreased with decreasing temperature. The resonance field of the broad line shifted to lower magnetic fields upon lowering the temperature with the gradient ΔH
r/ΔT = 2.3 G/K, while the narrow line shifted towards higher magnetic fields. The linewidth of the broader line increased with decreasing temperature while for the narrow lines in both samples this change was small. The magnetic iron oxide clusters produce a magnetic field which acts on the free radicals network and its strength depends essentially on the concentration of clusters. The reorientation process in the free radicals network is more intense in the sample without magnetic clusters.
Publisher

Journal
Year
Volume
10
Issue
1
Pages
166-171
Physical description
Dates
published
1 - 2 - 2012
online
3 - 12 - 2011
Contributors
author
  • Institute of Physics, West Pomeranian University of Technology, Al. Piastow 48, 70-311, Szczecin, Poland
author
  • Institute of Physics, West Pomeranian University of Technology, Al. Piastow 48, 70-311, Szczecin, Poland, typjan@zut.edu.pl
  • Institute of Physics, West Pomeranian University of Technology, Al. Piastow 48, 70-311, Szczecin, Poland
  • Institute of Physics, West Pomeranian University of Technology, Al. Piastow 48, 70-311, Szczecin, Poland
  • NCSR “Demokritos”, Aghia Paraskevi, Attikis, Athens, Greece
References
  • [1] L. Groenendall et al., Chem. Mater. 10, 226 (1998) http://dx.doi.org/10.1021/cm970344x[Crossref]
  • [2] J. P. Majoral, A. M. Caminade, Chem. Rev. 99, 845 (1999) http://dx.doi.org/10.1021/cr970414j[Crossref]
  • [3] A. B. Bourlinos et al., Eur. Polym. J. 42, 2940 (2006) http://dx.doi.org/10.1016/j.eurpolymj.2006.07.025[Crossref]
  • [4] G. Blotny, Tetrahedron 62, 9507 (2006) http://dx.doi.org/10.1016/j.tet.2006.07.039[Crossref]
  • [5] M. Shahid, R. S. Ashraf, E. Klemm, S. Sensfuss, Macromolecules 39, 7844 (2006) http://dx.doi.org/10.1021/ma061231e[Crossref]
  • [6] R. Y. C. Shin et al., Chem. Mater. 19, 1892 (2007) http://dx.doi.org/10.1021/cm070144d[Crossref]
  • [7] H. K. C. Pandya, Z. I. Niazimbetova, F. L. Beyer, M. E. Galvin, Chem. Mater. 19, 993 (2007) http://dx.doi.org/10.1021/cm060524j[Crossref]
  • [8] P. Dallas et al., Polymer 49, 1137 (2008) http://dx.doi.org/10.1016/j.polymer.2008.01.030[Crossref]
  • [9] P. Dallas et al., Polymer 48, 3162 (2007) http://dx.doi.org/10.1016/j.polymer.2007.03.055[Crossref]
  • [10] P. Dallas et al., Polymer 48, 2007 (2007) http://dx.doi.org/10.1016/j.polymer.2007.01.058[Crossref]
  • [11] A. B. Bourlinos et al., Carbon 44, 1906 (2006) http://dx.doi.org/10.1016/j.carbon.2006.02.008[Crossref]
  • [12] N. Guskos, G. Zolnierkiewicz, J. Typek, A. Guskos, D. Petridis, J. Non-Cryst. Solids 354, 4211 (2008) http://dx.doi.org/10.1016/j.jnoncrysol.2008.06.035[Crossref]
  • [13] N. Guskos, G. Zolnierkiewicz, J. Typek, A. Guskos, D. Petridis, Rev. Adv. Mater. Sci. 23, 164 (2010)
  • [14] N. Guskos, J. Typek, E. A. Anagnostakis, A. Blonska-Tabero, M. Bosacka, J. Alloy. Compd. 471, 28 (2009) http://dx.doi.org/10.1016/j.jallcom.2008.03.109[Crossref]
  • [15] N. Guskos, G. Zolnierkiewicz, A. Guskos, J. Typek, J. Blyszko, W. Kiernozycki, U. Narkiewicz, M. Podsiadly, J. Non-Cryst. Solids 354, 4510 (2008) http://dx.doi.org/10.1016/j.jnoncrysol.2008.06.067[Crossref]
  • [16] V. Likodimos, S. Glenis, N. Guskos, C. L. Lin, Phys. Rev. B 68, 045417 (2003) http://dx.doi.org/10.1103/PhysRevB.68.045417[Crossref]
  • [17] V. Likodimos, S. Glenis, N. Guskos, C. L. Lin, Phys. Rev. B 76, 075420 (2007) http://dx.doi.org/10.1103/PhysRevB.76.075420[Crossref]
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11534-011-0085-5
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.