Decreasing the operating voltage of a polymer-stabilized blue phase based on intermolecular affinity
Decreasing the operating voltage of a polymer-stabilized blue phase based on intermolecular affinity
复制标题
DOI：
10.1038/s41428-019-0183-6
复制
发表时间：
2019-07
期刊：
影响因子：
2.8
通讯作者：
D. Yoshizawa;Y. Okumura;J. Yamamoto;H. Kikuchi
中科院分区：
文献类型：
--
作者：
D. Yoshizawa;Y. Okumura;J. Yamamoto;H. Kikuchi
本研究展示了一种基于手性掺杂剂与聚合物纳米网络分子间亲和力的新型材料设计策略，以降低聚合物稳定蓝相（PSBP）的工作电压。我们重点研究了弱锚定界面，即所谓的“滑界面”，在此界面上，液晶和聚合物之间形成了无序的液晶或各向同性的液体层。为了在PSBP内部引入这种光滑的界面，合成了一种基于异山梨酯的极性手性掺杂剂，该掺杂剂有望对具有极性取代基的聚合物表现出高亲和力。极性手性掺杂的PSBP的工作电压随着聚合物上极性取代基比例的增加而显著降低，这与含有常规手性掺杂的PSBP的趋势形成鲜明对比。此外，含有极性手性掺杂剂和极性取代基聚合物的PSBP显示出较大的电光克尔常数。实验结果表明，合成的极性组分手性掺杂剂通过与聚合物的极性相互作用，作为BP的手性诱导剂和光滑界面诱导剂。
This study demonstrates a novel material design strategy to decrease the operating voltage of the polymer-stabilized blue phase (PSBP) based on intermolecular affinity between the chiral dopant and the polymer nanonetworks in the PSBP. We focus on the weak anchoring interface, the so-called “slippery interface”, at which a disordered liquid crystal or isotropic liquid layer is formed between the liquid crystal and polymer. To introduce such a slippery interface inside the PSBP, an isosorbide-based polar chiral dopant is synthesized, and this dopant is expected to show high affinity to polymers with polar substituents. The operating voltage of the PSBP with the polar chiral dopant is considerably decreased with an increasing ratio of polar substituents on the polymer, in striking contrast with the trend observed for the PSBP containing the conventional chiral dopant. Furthermore, the PSBP displays a large electro-optical Kerr constant for the PSBP containing the polar chiral dopant and polymer with the polar substituent. The experimental results suggest that the synthesized chiral dopant with a polar component acts as a chirality inducer for the BP and as a slippery interface inducer via polar-polar interaction with the polymer inside the PSBP.