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Journal of Materials Science

, Volume 28, Issue 17, pp 4811–4815 | Cite as

Acid-base, electron-donating and magnetic properties of Nd2O3 and its mixed oxides with alumina catalysts

  • S. Sugunan
  • G. Devika Rani
Papers

Abstract

The electron donor properties of Nd2O3 activated at 300, 500 and 800°C were investigated through studies on the adsorption of electron acceptors of various electron affinities — 7, 7, 8, 8-tetracyanoquinodimethane (2.84 eV), 2, 3, 5, 6-tetrachloro-1, 4-benzoquinone (2.40 eV), p-dinitrobenzene (1.77 eV), and m-dinitrobenzene (1.26 eV) in solvents acetonitrile and 1, 4-dioxan. The extent of electron transfer during adsorption has been found from magnetic measurements and electronic spectral data. The corresponding data on mixed oxides of neodymium and aluminium are reported for various compositions. The acid-base properties of catalysts were also determined using a set of Hammett indicators.

Keywords

Magnetic Property Electron Transfer Electron Donor Electron Acceptor Mixed Oxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    K. Esumi and K. Magara, J. Jpn. Soc. Color. Mater. 58 (1985) 9.CrossRefGoogle Scholar
  2. 2.
    K. Meguro and K. Esumi, J. Adhes. Sci. Technol. 4 (1990) 393.CrossRefGoogle Scholar
  3. 3.
    K. Esumi, K. Magara and K. Meguro, J. Colloid Interface Sci. 141 (1991) 578.CrossRefGoogle Scholar
  4. 4.
    B. D. Flockhart, J. A. N. Scott and R. C. Pink, Trans. Faraday Soc. 62 (1966) 73.CrossRefGoogle Scholar
  5. 5.
    H. Hosaka, T. Fujiwara and K. Meguro, Bull. Chem. Soc. Jpn. 44 (1971) 2616.CrossRefGoogle Scholar
  6. 6.
    M. Che, C. Naccache and B. Imelik, J. Catal. 24 (1972) 328.CrossRefGoogle Scholar
  7. 7.
    S. Sugunan, G. Devika Rani and K. B. Sherly, React. Kinet. Catal. Lett. 43 (1991) 375.CrossRefGoogle Scholar
  8. 8.
    S. Sugunan and G. Devika Rani, J. Mater. Sci. Lett. 10 (1991) 887.CrossRefGoogle Scholar
  9. 9.
    Idem, ibid. 11 (1992) 1528.CrossRefGoogle Scholar
  10. 10.
    K. Tanabe and T. Takashita, in “Acid-Base Catalysis” (Sangyo Tosho, Tokyo, 1975) p. 177.Google Scholar
  11. 11.
    S. Malinowski and S. Szczepanska, J. Catal. 2 (1963) 310.CrossRefGoogle Scholar
  12. 12.
    T. Arai, K. Maruya and T. Onishi, Bull. Chem. Soc. Jpn. 62 (1989) 349.CrossRefGoogle Scholar
  13. 13.
    T. Yamanaka and K. Tanabe, J. Phys. Chem. 79 (1975) 2409.CrossRefGoogle Scholar
  14. 14.
    R. H. Boyd and W. D. Philips, ibid. 43 (1965) 2927.CrossRefGoogle Scholar
  15. 15.
    R. Foster and T. J. Thomson, Trans. Faraday Soc. 58 (1962) 860.CrossRefGoogle Scholar
  16. 16.
    H. Hosaka, T. Fujiwara and K. Meguro, Bull. Chem. Soc. Jpn. 44 (1971) 2616.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • S. Sugunan
    • 1
  • G. Devika Rani
    • 1
  1. 1.Department of Applied ChemistryCochin University of Science and TechnologyCochinIndia

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