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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 7
BKCSDE 23(7)
July 20, 2002 

 
Title
Synthesis and Characterization of Nonlinear Optical Polymers Having Quinoline-based Chromophores
Author
Min Ho Kim, Jung-Il Jin, Chul Joo Lee, Nakjoong Kim, Ki Hong Park
Keywords
MQDT, Resonance, Configuration interaction theory.
Abstract
We synthesized three kinds of chromophores incorporating aromatic quinoline unit as a π-conjugated bridge in order to prepare more thermally stable nonlinear optical (NLO) chromophores than general stilbene unit. The NLO poly(methylmethacrylate) copolymer, polyimides, and polyester were successfully synthesized by these corresponding quinoline-based monomers. Their physical and optical properties were investigated by thermogravimetry, gel permeation chromatography, ultraviolet-visible spectroscopy, second harmonic generation (SHG) and electro-optic (EO) measurement. All the polymers exhibited better thermal stability,however their NLO activity was a little lower than that of general stilbene-based NLO polymers. Among three kinds of polymers, the PMMA copolymer with quinoline chromophores had the largest SHG coefficient d33 value of 27 pm/V (at 1.064 ㎛) and EO coefficient r33 value of 6.8 pm/V (at 1.3 ㎛).
Page
964 - 970
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