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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 (Tg) 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 ( ηmax) of 50 μm-thick film was about 5% at 80 V/ μm.
Page
1793 - 1798
Full Text
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