Effect of ester moieties in dye structures on photoinduced reorientation of dye-doped liquid crystals
Effect of ester moieties in dye structures on photoinduced reorientation of dye-doped liquid crystals
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DOI：
10.1021/cm0503580
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发表时间：
2005-08-23
影响因子：
8.6
通讯作者：
Ikeda, T
中科院分区：
文献类型：
--
作者：
Yaegashi, M;Shishido, A;Ikeda, T
研究了染料掺杂向列相液晶(LCS)的光致重取向行为。新合成了含酯基的噻吩衍生物作为客体染料分子。研究了这些化合物的液晶行为和光学性质，并考察了染料结构对染料掺杂液晶的光诱导重取向行为的影响。当488 nm的Ar+激光超过阈值光强时，在11W/cm(2)的自位相调制效应下观察到了光致衍射环的形成。比较了出现衍射环的最低阈值光强，结果表明，与其他染料相比，直接与噻吩端连接了酯基的噻吩染料具有更低的阈值光强。
The photoinduced reorientation behavior of dye-doped nematic liquid crystals (LCs) was investigated. Thiophene derivatives with ester moieties were newly synthesized as the guest dye molecule. The liquid-crystalline behavior and optical properties of these compounds were evaluated, and the effect of the dye structure on the photoinduced reorientation behavior of the dye-doped LCs was investigated. The photoinduced formation of diffraction rings was observed as a result of the self-phase modulation effect at the intensity of 11 W/cm(2), when an Ar+ laser beam at 488 nm was irradiated above the threshold intensity. Comparison of the lowest threshold light intensity for the appearance of the diffraction rings revealed that the thiophene dye with ester moieties directly bound to the terminal thiophene shows a lower threshold intensity than those of any other dyes.