中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-硝基对苯二甲酸 | nitroterephthalic acid | 610-29-7 | C8H5NO6 | 211.131 |
4-甲基-3-硝基苯甲酸 | 4-methyl-3-nitrobenzoic acid | 96-98-0 | C8H7NO4 | 181.148 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-nitrobenzene-1,4-dicarboxamide | 50739-80-5 | C8H7N3O4 | 209.161 |
2-硝基对苯二甲酸二甲酯 | dimethyl 2-nitroterephthalate | 5292-45-5 | C10H9NO6 | 239.185 |
2-硝基对苯二甲酸二甲酯 | 2-nitroterephthalic acid diethyl ester | 39020-35-4 | C12H13NO6 | 267.238 |
—— | diisopropyl nitroterephthalate | 61220-63-1 | C14H17NO6 | 295.292 |
It has been challenging to directly probe the molecular-scale organization of nonglassy nematic liquid crystal (LC) molecules without altering the LC directors. Here, we design and synthesize a new type of stable nematic liquid crystal monomer (LCM) system with strong dipole–dipole interactions. The new LCMs can achieve faithful anchoring and alignment control at various boundaries, analogous to that of small molecule LCs. Upon photo-cross-linking, the orientational order of mesogens is effectively and faithfully locked, allowing for direct visualization of the LC director field and defect structures by scanning electron microscopy (SEM) with 100-nm resolution. Further, we use SEM imaging to calculate the extrapolation length of the LCM for planar and homeotropic anchoring.
直接探测非玻璃态向列型液晶(LC)分子的分子级组织一直是具有挑战性的,因为这会改变LC导向子。在这里,我们设计并合成了一种新型稳定的向列型液晶单体(LCM)系统,具有强烈的偶极-偶极相互作用。新的LCM可以在各种边界上实现忠实的锚定和定向控制,类似于小分子LC。通过光交联,mesogens的定向序被有效地和忠实地锁定,可以通过扫描电子显微镜(SEM)以100纳米的分辨率直接可视化LC导向场和缺陷结构。此外,我们使用SEM成像计算LCM的平面和homeotropic锚定的外推长度。