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

Sang Ho Lee, Woong Sang Jahng, Ki Hong Park, Nakjoong Kim, Won Jae Joo, Dong Hoon Choi

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A new photoconducting polymer, diphenyl hydrazone-substituted polysiloxane, was successfully synthesized by the hydrosilylation method and characterized by FT-1R, 1H-NMR, and 29Si-NMR spectroscopy. The glass transition temperature (Tg) of the polysiloxane having pendant diphenyl hydrazone was ca. 62°C, 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 C60 dopant, showed a high photoconductivity (2.8 × 10-12 S/cm at 70 V/μm) 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 C 60. This composite shows a large orientation birefringence (Δn = 2.6 × 10-3 at 50 V/μm) and a high diffraction efficiency of 81 % at an electric field of 40 Vf/μm.

Original languageEnglish
Pages (from-to)431-436
Number of pages6
JournalMacromolecular Research
Volume11
Issue number6
DOIs
Publication statusPublished - 2003 Dec

Keywords

  • Diphenyl hydrazone
  • Hydrosilylation
  • Photoconducting
  • Photorefractive
  • Polysiloxane

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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