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Journal of Materials Science

, Volume 30, Issue 22, pp 5789–5792 | Cite as

Photochromism of spiropyran and diarylethenedoped silica gels prepared by the sol-gel process

  • M. Nogami
  • Y. Abe
Papers

Abstract

Spiropyran and diarylethene were doped in silica gels which were prepared from Si(OCH3)4 and Si(OC2H5)4, respectively, and their photochromic properties were compared. In the gels, both organics are incorporated with open modifications and show the photochromism between red and colourless modifications. The closed form of spiropyran, which is converted from the open one by irradiation with light, is thermally backed into the open form after the light is blocked. The activation energy of thermochemical reaction is 0.86 eV. Diarylethene shows no thermochemical reaction below 140°C, but shows a photochemically reversible change on alternate irradiation by light of 436.5 and 578 nm.

Keywords

Polymer Activation Energy Closed Form Material Processing Open Modification 
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.
    D. Avnir, D. Levy and R. Reisfeld, J. Phys. Chem. 88 (1984) 5956.CrossRefGoogle Scholar
  2. 2.
    A. Makishima and T. Tani, J. Am. Ceram. Soc. 69 (1986) 4.Google Scholar
  3. 3.
    V. R. Kaufman and D. Avnir, Langmuir 2 (1986) 717.CrossRefGoogle Scholar
  4. 4.
    D. Levy and D. Avnir, J. Phys. Chem. 92 (1988) 4734.CrossRefGoogle Scholar
  5. 5.
    Y. Kobayashi, Y. Imai and Y. Kurokawa, J. Mater. Sci. Lett. 7 (1988) 1148.CrossRefGoogle Scholar
  6. 6.
    K. Matsui, T. Matsuzuka and H. Fujita, J. Phys. Chem. 93 (1989) 4991.CrossRefGoogle Scholar
  7. 7.
    J. C. Pouxviel, B. Dunn and J. I. Zink, ibid. 93 (1989) 2134.CrossRefGoogle Scholar
  8. 8.
    D. Preston, J. C. Pouxviel, T. Novinson, W. C. Kaska, B. Dunn and J. I. Zink, ibid. 94 (1990) 4167.CrossRefGoogle Scholar
  9. 9.
    D. Levy, S. Einhorn and D. Avnir, J. Non-Cryst. Solids. 113 (1989) 137.CrossRefGoogle Scholar
  10. 10.
    R. Zusman, C. C. Rottman, M. Ottolenghi and D. Avnir, ibid. 122 (1990) 107.CrossRefGoogle Scholar
  11. 11.
    D. Levy, C. J. Serna and J. M. Oton, Mater. Lett. 10 (1991) 470.CrossRefGoogle Scholar
  12. 12.
    M. Nogami and T. Sugiura, J. Mater. Sci. 12 (1993) 1544.Google Scholar
  13. 13.
    M. Irie and M. Mohri, J. Org. Chem. 53 (1988) 803.CrossRefGoogle Scholar
  14. 14.
    S. Nakamura and M. Irie, ibid. 53 (1988) 6136.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • M. Nogami
    • 1
  • Y. Abe
    • 1
  1. 1.Department of Materials Science and EngineeringNagoya Institute of TechnologyShowa NagoyaJapan

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