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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 24, Number 12
BKCSDE 24(12)
December 20, 2003

Title	Synthesis and Characterization of Bifunctional Organic-Glasses Based on Diphenylhydrazone and Barbituric Acid Derivative for Photorefractive Application
Author	Sang Ho Lee, Chil Sung Choi, Nakjoong Kim, Dong Hoon Choi, Ki Hong Park*
Keywords	Photorefractive, Diphenyl hydrazone, Bifunctional, Organic-glasses, Amorphous molecule
Abstract	A series of amorphous molecules that possess both photoconductive and electro-optic properties was synthesized in order to investigate photorefractive properties of bifunctional organic-glasses. Diethylaminobenzaldehyde-diphenylhydrazone was covalently attached to 5-(4-diethylamino-benzylidene)-1,3-dimethylpyrimidine-2,4,6-trione through a flexible alkyl chain (3, 4, 5, 6 and 10 carbons) containing two ether linkages. The longer linkage not only lowered the glass transition temperature (T_g) of the molecules, but also allowed faster orientation of the chromophore. To examine the photorefractive properties, a 50 μm-thick film was prepared from the mixture of a bifunctional molecule, butyl benzyl phthalate, and C₆₀. The photoconductivity of this composite was as high as 8.01 × 10^-12 S/cm at 60 V/ μm, and the maximum diffraction efficiency ( η_max) of 50 μm-thick film was about 5% at 80 V/ μm.
Page	1793 - 1798
Full Text	PDF

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