화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.15, No.1, 59-64, February, 2007
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Synthesis and Characterization of Dendritic Nonlinear Optical Chromophore Containing Phenylene Attached with Bulky Alkyl Group
Jin Joo Choi, Kyoung-Mahn Kim, Jong Sun Lim, Changjin Lee, and Dong Wook Kim†
  • Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
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Star-shaped, nonlinear optical (NLO) material was synthesized and its optical, thermal, and electro-optic properties were investigated. Three NLO-active dipolar chromophores containing a phenylene ring substituted with a bulky alkyl chain as a conjugation bridge were chemically bonded to the core of 1,1,1-tris(4-hydroxyphenyl)ethane to form a dendritic architecture. The chemical structure and purity of the chromophore were verified by NMR spectroscopy. The chromophore exhibited a broad absorption band centered at around 608 nm tailing up to 760 nm in toluene solution and also showed a discernible solvatochromic shift in more polar solvent. The chloroform solution of the dendrimer produced an absorption band with a red-shifted maximum as large as 28 nm when compared to that of the toluene solution. It was thermally stable up to 275 ℃ in a nitrogen atmosphere and had a glass transition temperature of 76 ℃. In a preliminary result, the polymer film containing the dendritic compound exhibited a shift of 19 pm/V taken at 1.55 μ.
Keywords:nonlinear optical chromophore;electro-optic;dendrimer;thermal stability
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