• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >In situ planar photoalignment of liquid crystals: two-step interfacial modifications through light-matter interactions actuated by linearly polarized UV-light
【24h】

In situ planar photoalignment of liquid crystals: two-step interfacial modifications through light-matter interactions actuated by linearly polarized UV-light

机译：液晶的原位平面光谱：通过线性偏振紫外线驱动的浅滤波相互作用的两步界面修饰

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Photopolymerizable, photoisomerizable, photodimerizable and photoluminescent dichroic chromophores are deliberately designed and used for comprehending the sequential realization of the polyimide-free in situ photoalignment of liquid crystals (LCs). Upon a linearly polarized UV-light (LPUV) treatment, the multifunctional photoaligning additive, homogeneously dissolved in a LC mixture, is interfacially polymerized at the inner surfaces as a thin photo-responsive polymer layer. Subsequently, the molecular orientational anisotropy is induced by the dichroic photochromic responses, resulting in a uniaxial planar LC alignment. The reversible trans/cis-isomerization plays a crucial role for the LC alignment, rather than irreversible [2+2] dimerization. Therefore, the LC aligning effect is strongly influenced by the wavelengths of LPUV. Under the longer wavelength UV-irradiation (lambda > 350 nm), the reversible isomerization is more preferable to the irreversible dimerization, resulting in a rewritable LC alignment with much better alignment quality. Such sequential processes are evidenced by monitoring spatial and orientational distributions of the self-labeled dichroic fluorescent monomers during the process. The conclusions are further corroborated by the wavelength dependencies of the photochromic responses, LC aligning effect, and rewritable LC alignment.
机译：可光聚合，光可变，光可视化和光致发光的二色色色影色度，用于理解液晶（LCS）的液晶的序列式的顺序实现。在线性偏振的UV光（LPUV）处理时，在LC混合物中均匀地溶解的多功能光对齐添加剂在作为薄的光响应聚合物层的内表面处界面聚合。随后，通过二色性光致变色响应诱导分子取向各向异性，从而产生单轴平面LC对准。可逆反式/顺式异构化对LC比对起着至关重要的作用，而不是不可逆转的[2 + 2]二聚化。因此，LC对准效果受LPUV波长的强烈影响。在较长的波长紫外线照射（Lambda> 350nm）下，更优选不可逆的二聚化更优选可逆异构化，从而产生具有更好的对准质量的可重写的LC对准。通过监测在该方法期间自标记二向色荧光单体的空间和取向分布来证明这种顺序过程。通过光致变色响应，LC对准效果和可重写LC对准的波长依赖性进一步证实了结论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号