Nematic-to-isotropic photo-induced phase transition in azobenzene-doped low-molar liquid crystals

Jaume Garcia-Amoros; Anna Szymczyk; Dolores Velasco

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Nematic-to-isotropic photo-induced phase transition in azobenzene-doped low-molar liquid crystals

机译：偶氮苯掺杂的低摩尔液晶中向列向各向同性的光诱导相变

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The photo-induced phase transition generated by several 4,4'-disubstituted azobenzenes in host nematic low-molar mass liquid crystals was quantified by means of the efficiency, ΔT_(N-1), using polarized optical microscopy (POM) at variable temperature. Non-covalent interactions established between mesogen and azobenzene were the main determinants of the photo-induced phase transition behaviour. The correct design of the chemical structure of the system components allows controlling the temperature range in which the photo-induced mesophase transition occurs. Therefore, more efficient systems were obtained when azobenzenes with an extended aromatic core were used.

机译：使用可变温度下的偏振光学显微镜（POM），通过效率ΔT_（N-1）定量分析宿主向列型低摩尔质量液晶中数个4,4'-双取代的偶氮苯产生的光诱导相变。。液晶元和偶氮苯之间建立的非共价相互作用是光诱导相变行为的主要决定因素。系统组件化学结构的正确设计可以控制发生光诱导中间相转变的温度范围。因此，当使用具有延伸的芳族核的偶氮苯时，可获得更有效的系统。

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《Physical chemistry chemical physics: PCCP》 |2009年第21期|共7页
作者
Jaume Garcia-Amoros; Anna Szymczyk; Dolores Velasco;
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1. Nematic-to-isotropic photo-induced phase transition in azobenzene-doped low-molar liquid crystals [J] . Jaume Garcia-Amoros, Anna Szymczyk, Dolores Velasco Physical chemistry chemical physics: PCCP . 2009,第21期

机译：偶氮苯掺杂的低摩尔液晶中向列向各向同性的光诱导相变
2. Nature of the liquid crystalline phase transitions in the cesium pentadecafluorooctanoate (CsPFO)-water system: The nematic-to-isotropic transition - art. no. 051705 [J] . Jolley KW., Boden N., Henderson JR., Physical review, E. Statistical physics, plasmas, fluids, and related interdisciplinary topics . 2001,第5aPta1期

机译：十五氟辛酸铯（CsPFO）-水系统中液晶相变的性质：向列相向各向同性过渡-艺术。没有。 051705
3. Reversible Phase Transition and Rapid Switching of Azobenzene-Doped Cholesteric Liquid Crystals with a Single Laser [J] . Ming-Hung Wu Chih-Chien Chu Min-Chi Cheng Vincent K. S. Hsiao Molecular Crystals and Liquid Crystals . 2012,第1期

机译：单个激光掺杂偶氮苯的胆甾型液晶的可逆相变和快速转换
4. Defect formation at the nematic-to-isotropic phase in a liquid crystalline polymer [C] . Mohan Srinivasarao, Univ. of Massachusetts/Amherst, Amherst, Liquid Crystal Materials, Devices, and Applications II . 1993

机译：液晶聚合物在向列-各向同性相中形成缺陷
5. Surface structures and reentrant transitions in tilted smectic phases of chiral liquid crystals. [D] . McCoy, Bradley Kenneth. 2007

机译：手性液晶的倾斜近晶相中的表面结构和折返过渡。
6. Effect of Molecular Flexibility on the Nematic-to-Isotropic Phase Transition for Highly Biaxial Molecular Non-Symmetric Liquid Crystal Dimers [O] . Nerea Sebastián, David Orencio López, Sergio Diez-Berart, 2011

机译：分子柔性对高度双轴分子非对称液晶二聚体向列相向各向同性相变的影响
7. Influence of the chain length on the nematic-to-isotropic phase transition for the odd members of a highly non-symmetric pyrene-based series of liquid crystal dimers [O] . Salud Puig Josep, López Pérez David Orencio, Sebastian Ugarteche Nerea, 10000

机译：链长对高度非对称芘系列液晶二聚体奇数成员的向列 - 各向同性相变的影响
8. Study of crystalization, crosslinking and dimensional changes during the crystal-liquid phase transition of oriented polymeric systems Semiannual report for period ending 1 Sep. 1968 [R] . Mandelkern, L. 1968

机译：取向聚合物体系晶 - 液相变过程中结晶，交联和尺寸变化的研究半年度报告截至1968年9月1日

Nematic-to-isotropic photo-induced phase transition in azobenzene-doped low-molar liquid crystals

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