Study of NLO Behavior of MMA/AZO DYE System Containing a Double-End Crosslinkable Chromophore

• Main Authors: Chin-Yang Yu, 游進陽
• Other Authors: Sung-Nung Lee
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/24246458813573693710

碩士 === 輔仁大學 === 化學系 === 87 === Abstract A new double-end crosslinkable (DEC) second-order nonlinear optical (NLO) molecule , {4-[(2-methacryloyloxyethyl)sulfonyl]-4''-[[(2-methacryloyloxyethyl)ethyl]amino]azobenzene}(MSMEAAB) , was synthesized from {4-[(2-hydroxyethyl)sulfonyl]-4''-[[(2-hydroxyethyl)ethyl]amino]azobenzene} (HSHEAAB) and methacryloyl chloride . This new DEC-NLO chromophore molecule was then crosslinked with MMA by thermal process under electric field poling to form a new thermosetting NLO polymer . High second harmonic generation signals were observed for the polymeric systems with higher NLO chromophore content , as well as with those higher crosslinking densities . Besides , the polymeric systems with higher electric field poling also exhibited higher second harmonic generation intensities . The extents of chromophores alignment can be detected by UV-Visible spectra . After poling , the absorbance strength dropped down and bring about increasing of order parameter . Besides , the polymeric systems with higher order parameter also exhibited higher second harmonic generation intensities . The polymeric systems with higher crosslinking densities and higher extents of cure exhibited lower dielectric relaxation strength and trend to form more well-distribution configurations .