研究目的
Investigating the influence of 4-[(E)-(4'-heptyloxyphenyl)diazenyl]phthalonitrile on the properties of a cyanobiphenyl liquid crystal mixture.
研究成果
The addition of 4-[(E)-(4'-heptyloxyphenyl)diazenyl]phthalonitrile to the CB-6 liquid crystal mixture enhances the dielectric anisotropy without significantly affecting the birefringence. This effect is attributed to the high polarity of 7O-AB-CN2 and its effective inclusion into the liquid crystalline matrix. The study suggests potential applications for 7O-AB-CN2 as a doping agent in liquid crystal materials for electro-optical devices.
研究不足
The study is limited to the effects of 7O-AB-CN2 on the CB-6 mixture, and the findings may not be generalizable to other liquid crystal mixtures or additives. The experimental conditions, such as temperature and concentration ranges, also limit the scope of the study.
1：Experimental Design and Method Selection:
The study involved the synthesis and purification of 4-[(E)-(4'-heptyloxyphenyl)diazenyl]phthalonitrile, followed by its addition to a six-component mixture of 4'-(n)-alkyloxy-4-cyanobiphenyls (CB-6). The mesomorphic properties were studied using polarization microscopy and DSC. The dielectric and optical properties were measured using an LCR-817 instrument and refractometric methods, respectively.
2：6). The mesomorphic properties were studied using polarization microscopy and DSC. The dielectric and optical properties were measured using an LCR-817 instrument and refractometric methods, respectively. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The samples included the synthesized 7O-AB-CN2 and the CB-6 liquid crystal mixture.
3：List of Experimental Equipment and Materials:
Polarization microscope (Polam P211), hot bench, KPC-S230CWX camera, DSC (Netzsch STA A-0177-M), LCR-817 instrument (INSTEK), refractometer.
4：Experimental Procedures and Operational Workflow:
The phase transition temperatures were determined by DSC and thermal microscopy. The dielectric permittivity was measured at 10 kHz in a temperature-controlled cell. The birefringence was measured using an Abbe refractometer.
5：Data Analysis Methods:
The dielectric anisotropy was calculated by the formula: Δε = ε|| – ε⊥. The birefringence Δn = n|| – n⊥ was determined from the refractive indices.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
