Department of Chemistry; University of Central Florida, P.O. Box 162366, Orlando, FL 32816- 2366, USA.
CREOL, The College of Optics and Photonics, University of Central Florida, P.O. Box 162366, Orlando, FL 32816-2366, USA.
Int J Mol Sci. 2009 Nov 4;10(11):4772-4788. doi: 10.3390/ijms10114772.
Several divinylic mesogenic monomers were synthesized based on coupling the monomer 4-(4-pentenyloxy)benzoic acid with chlorohydroquinone, 2,5-dihydroxy- acetophenone, methylhydroquinone or 2-methoxyhydroquinone. This resulted in novel mesogens of phenylene esters with different lateral substituent groups. The effect of the lateral substituent group on the thermotropic phase behavior for these liquid crystalline compounds was investigated using DSC and optical polarized microscopy. All the mesogens proved to have a wide nematic liquid crystalline range. Only the phenylene ester, which has a methoxy lateral substituent, exhibited both nematic and smectic phases. Structural confirmation of all new derivatives was accomplished by (1)H- and (13)C-NMR spectroscopic analysis, along with CH elemental analysis.
几种联苯介晶单体是通过将单体 4-(4-戊烯氧基)苯甲酸与氯对苯二酚、2,5-二羟基苯乙酮、间甲酚或 2-甲氧基对苯二酚偶联合成的。这导致了具有不同侧基的新型苯甲酚酯介晶。使用 DSC 和偏光显微镜研究了这些液晶化合物的侧基对热致相行为的影响。所有的介晶都具有很宽的向列相液晶范围。只有具有甲氧基侧基的苯甲酚酯表现出向列相和近晶相。通过（1）H 和（13）C-NMR 光谱分析以及 CH 元素分析完成了所有新衍生物的结构确证。
