629649-90-7Relevant academic research and scientific papers
Using functionalized nonlinear optical chromophores to prepare NLO-active polycarbonate films
González-Lainez,Jiménez-Ruiz,Martínez De Baroja,Garín,Orduna,Villacampa,Blesa
, p. 30 - 40 (2015/04/14)
Novel functionalized second order nonlinear optical (NLO) chromophores have been prepared with functionalized aniline as electron donor, thiophene or isophorone as a π-spacer and 1,3-diethyl-2-thiobarbituric acid as electron acceptor. The films prepared from dyes with alkylsilyl bulky groups gave better performance than the corresponding non functionalized chromophores due to the reduction of the intermolecular electrostatic interactions. The incorporation of chromophores 4 and 10 in a polycarbonate matrix allowed the preparation of good optical-quality films. Nonlinear coefficients d33 and d31 as high as 17 and 5.6 pm V-1, respectively, were obtained. Moreover, the temporal stability of these host-guest films was confirmed up to eight months (>80%).
Nonlinear optical side-chain polymers post-functionalized with high-β chromophores exhibiting large electro-optic property
Piao, Xianqing,Zhang, Xianmin,Mori, Yuichi,Koishi, Masayuki,Nakaya, Akinari,Inoue, Shinichiro,Aoki, Isao,Otomo, Akira,Yokoyama, Shiyoshi
, p. 47 - 54 (2011/10/02)
Electro-optic side-chain polymers have been synthesized by the post-functionalization of methacrylate isocyanate polymers with novel phenyl vinylene thiophene vinylene bridge (FTC) nonlinear optical chromophores. For this application, FTC-based chromophores were modified in their electronic donor structure, exhibiting much larger molecular hyperpolarizabilities compared with the benchmark FTC. Of these new chromophores, absorption spectra, hyper-Rayleigh scattering experiment, and thermal analysis were carried out to confirm availability as effective nonlinear optical units for electro-optic side-chain polymers. The electro-optic coefficients (r33) of obtained polymers were investigated in the process of in situ poling by monitoring the temperature, current flow, poling field, and electro-optic signal. Compared with the nonsubstituted analogue, benxyloxy modified FTC chromophore significantly achieved higher nonlinear optical property, exhibiting molecular hyperpolarizability at 1.9 μm of 4600 × 10-30 esu and an r33 value of 150 pm/V at the wavelength of 1.31 μm. Synthesized electro-optic polymers showed high glass transition temperature (Tg), so that the temporal stability examination exhibited >78% of the electro-optic intensity remaining at 85 °C over 500 h. Copyright
