CAJ | 학술논문

以4-烷基反式环己基甲酸为原料,经格氏、黄鸣龙、碘代及“一锅法”Sonogashira 偶联等反应,制备了10个含乙撑桥键二苯炔四环液晶化合物,其结构经 IR, NMR 和 MS 确认.利用差示扫描量热仪(DSC)、偏光显微镜(POM)和阿贝折光仪对目标化合物进行了性能测试.结果表明,目标化合物具有高清亮点(220~240℃)、宽向列相区间(59.6~99.6℃)和大光学各向异性(△n>0.3),其性能可满足液晶光学的应用要求.
이4-완기반식배기기갑산위원료,경격씨、황명룡、전대급“일과법”Sonogashira 우련등반응,제비료10개함을탱교건이분결사배액정화합물,기결구경 IR, NMR 화 MS 학인.이용차시소묘량열의(DSC)、편광현미경(POM)화아패절광의대목표화합물진행료성능측시.결과표명,목표화합물구유고청량점(220~240℃)、관향렬상구간(59.6~99.6℃)화대광학각향이성(△n>0.3),기성능가만족액정광학적응용요구.
Ten four-ring liquid crystals with ethylene and internal alkyne bridge were synthesized via Grignard reaction, Huang Minglong reduction, iodination, “one-pot” Sonogashira cross-coupling reaction with trans-4-alkyl-cyclohexane-carboxylic-acid as the starting substrate. The structures of the compounds were confirmed by infrared spectrometry(IR), nuclear magnetic resonance(NMR) and mass spectra(MS). The differential scan-ning calorimetry(DSC), polarising optical microscopy(POM) and Abbe refractometer were used to measure their properties. The results show that the compounds possess high clearing point (220-240 ℃), broad nematic phase(59. 6-99. 6 ℃) and high birefringence(△n>0. 3). These properties match the requirement of liquid crystal optics.