Synthesis and characterization of a new photoconducting poly(siloxane) having pendant diphenylhydrazone for photorefractive applications

被引:17
作者
Lee, SH
Jahng, WS
Park, KH
Kim, N
Joo, WJ
Choi, DH
机构
[1] Korea Inst Sci & Technol, Optoelect Mat Res Ctr, Seoul 136791, South Korea
[2] Hanyang Univ, Dept Chem, Seoul 136791, South Korea
[3] Kyunghee Univ, Coll Environm & Appl Chem, Kyonggi Do 449701, South Korea
关键词
photorefractive; diphenyl hydrazone; polysiloxane; photoconducting; hydrosilylation;
D O I
10.1007/BF03218972
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A new photoconducting polymer, diphenyl hydrazone-substituted polysiloxane, was successfully synthesized by the hydrosilylation method and characterized by FT-IR, H-1-NMR, and Si-29-NMR spectroscopy. The glass transition temperature (T,) of the polysiloxane having pendant diphenyl hydrazone was ca. 62 degreesC, which enabled a component of a low-T-g photorefractive material to be prepared without the addition of any plasticizers. This polysiloxane, with 1 wt% of C-60 dopant, showed a high photoconductivity (2.8 X 10(-12) S/cm at 70 V/mum) at 633 nm, which is necessary for fast build-up of the space-charge field. A photorefractive composite was prepared by adding a nonlinear optical chromophore, 2-{3-[2-(dibutylamino)-1-ethenyl]-5,5-dimethyl-2-cyclohexenylidene} malononitrile. into the photoconducting polysiloxane together with C60. This composite shows a large orientation birefringence, (Deltan = 2.6 X 10(-3) at 50 V/mum) and a high diffraction efficiency of 81% at an electric field of 40 V/mum.
引用
收藏
页码:431 / 436
页数:6
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