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Quasi-Crystals Produced by Colloidal Photochromic Dyes in an Applied Electric Field

  • V. A. Krongauz

Abstract

Colloidal solutions are formed during the photochemical transformation of solutions of photochromic spiropyrans in non-polar solvents. The systems are composed of globules ~ 0.1–0.4 µm in diameter. The globules consist of highly dipolar crystalline nuclei enclosed in amorphous envelopes. In a constant external electric field linear quasi-crystalline material is formed composed of globules joined together like straight strings of beads aligned along the electric lines of force. The distinctive features of quasi-crystal formation were studied in the electron microscope.

Keywords

Colloidal Solution Photochemical Transformation Amorphous Coating Primary Nucleus Merocyanine Form 
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References

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    Krongauz V A and Parshutkin A A, Photochem. Photobiol. 15, (1972) 503.CrossRefGoogle Scholar
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    Parshutkin A A and Krongauz V A, Molec. Photochem., 6, (1974) 437.Google Scholar
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    Krongauz V A, Fishman S N and Goldburt E S, J. Phys. Chem., in press.Google Scholar

Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • V. A. Krongauz
    • 1
  1. 1.Department of Structural ChemistryThe Weizmann Institute of ScienceRehovotIsrael

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