Azobenzene-containing liquid crystalline block copolymer supramolecular complexes as a platform for photopatternable colorless materials†,Journal of Materials Chemistry C

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Azobenzene-containing liquid crystalline block copolymer supramolecular complexes as a platform for photopatternable colorless materials†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019-12-20 , DOI: 10.1039/c9tc06397h
Miron Bugakov _{1,

2,

3,

4} , Natalia Boiko _{1,

2,

3,

4} , Sergey Abramchuk _{1,

2,

3,

4,

5} , Xiaomin Zhu _{6,

7,

8} , Valery Shibaev _{1,

2,

3,

4}

Affiliation

Supramolecular self-assembly of a host polymer with small guest molecules is a versatile and efficient approach for designing various stimuli-responsive polymer materials among which are liquid crystalline (LC) polymers. This work reports the synthesis and investigation of photosensitive side-chain liquid crystalline triblock copolymer supramolecular complexes formed via intermolecular pyridine–phenol hydrogen bonding. These complexes are based on ABA host triblock copolymers with phenyl benzoate mesogenic groups and 4-vinylpyridine units and an azobenzene-containing phenol, which play the role of small guest molecules. We demonstrate that irradiation of complex films with linearly polarized light and subsequent rinsing with diethyl ether result in colorless birefringent films with recorded phase images. It is shown that the morphology of the triblock copolymer complexes influences the kinetics of the photoorientation as well as the rinsing process. For the films of a random copolymer complex, the rinsing process leads to erasing recorded images, that is, a microphase separated structure is crucial for optical recording.

中文翻译：

含偶氮苯的液晶嵌段共聚物超分子络合物作为可光形成图案的无色材料的平台†

具有小的客体分子的主体聚合物的超分子自组装是一种通用且有效的方法，用于设计各种刺激响应性聚合物材料，其中液晶（LC）聚合物是这种材料。这项工作报告的合成和感光侧链液晶的调查三嵌段共聚物超分子复合物形成通过分子间吡啶-苯酚氢键。这些络合物基于具有苯甲酸酯苯基介晶基团，4-乙烯基吡啶单元和含偶氮苯的苯酚的ABA主体三嵌段共聚物，它们起着小的客体分子的作用。我们证明了用线性偏振光辐照复杂的薄膜并随后用乙醚冲洗会导致无色的双折射薄膜，并记录下相位图像。结果表明，三嵌段共聚物配合物的形态影响光取向动力学以及漂洗过程。对于无规共聚物配合物的薄膜，冲洗过程会导致擦除记录的图像，也就是说，微相分离的结构对于光学记录至关重要。

更新日期：2020-01-14

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