Synthesis and mesomorphic behaviour of achiral four-ring unsymmetrical bent-core liquid crystals: Nematic phases
作者:Manoj Kumar Paul、Gayatri Kalita、Atiqur Rahman Laskar、Somen Debnath、Venkatesh Gude、Dipika Debnath Sarkar、Golam Mohiuddin、Sanjay Kumar Varshney、V.S. Nandiraju Rao
DOI:10.1016/j.molstruc.2013.06.044
日期:2013.10
characterization of phase behaviour are discussed. The molecular structure characterization is consistent with data from elemental and spectroscopic analysis. The materials thermal behaviour and phase characterization have been investigated by differential scanning calorimetry and polarizing optical microscopy. All these compounds exhibit enantiotropic nematic phase over wide temperature range. Stable supercooling
已经设计并合成了衍生自 3-氨基-2-甲基苯甲酸的非手性四环不对称弯曲核液晶,其中包含亚胺、酯和光致变色偶氮连接部分。这些类似于弯曲分子的曲棍球棒形状在分子的一端具有烷氧基链,在另一端具有甲基或甲氧基。讨论了合成、相变温度和相行为的表征。分子结构表征与元素和光谱分析的数据一致。通过差示扫描量热法和偏光显微镜研究了材料的热行为和相表征。所有这些化合物在很宽的温度范围内都表现出对映向列相。在甲氧基同系物中观察到向列相的稳定过冷。进行密度泛函理论(DFT)计算以获得化合物的稳定分子构象、极化率、偶极矩、最高占据分子轨道(HOMO)、最低未占据分子轨道(LUMO)能量和弯曲角。