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中文摘要：
本文以对溴苯甲醚为原料制备成格氏试剂，与4-丙基环己酮亲核加成，脱水，Pd／C催化脱氢芳基化，LiPPh，脱甲基得到了4-正丙基-4’-羟基联苯。该联苯与酰氯酯化反应合成了系列丙基联苯酯类液晶化合物C3H7-C6H4-C6H4-OC（O）R。通过差示扫描量热法和热台偏光显微镜对其介晶性研究发现，当R=CnH2n＋1（n=3，4）时，化合物无液晶性；但n=5—7、10，C8H16CH=CH2，C8H16C；CH时，化合物具有SA相；当R=CH2OCmH2m＋1（m=2—5），CH2OCH2CH2OCH3时，化合物呈有序度较较高的SB相。这类化合物的液晶相较窄，多在25℃-100℃范围内。TGA测试的化合物热分解温度都高于200℃。
英文摘要：
In this paper 4 -（ n- propyl） -4＇ -hydroxylbiphenyl was synthezied from 4- bromine- 1- methoxybenzene and 4 - propylcyclohexanone through Gfignard reagent preparation, nucleophilic addition, dehydration, Pd/C catalyzed dehydrogenation, demethylation by LiPPh2. Reaction of the bipheny1-4 - ol with alkanoyl chloride resulted in new esters of C3H7 - C6H4 - C6H4 - OC（O） R. The liquid crystalline properties were investigated by differential scanning calorimetry and polarized optical microscopy. The results show that the molecules with short alkyl chains R = CoH2n＋1 （n = 3, 4） have no liquid crystals phase, and longer alkyl chains compounds with R = CnH2n＋1 （n = 5 -7,10） ,and CsH16CH = CH2, C8H16C=CH exhibited SA phases, while molecules with oxygen -atom containing chains of R = CH2OCmH2n＋1 （m = 2 -5 ）, CH2OCH2CH2OCH3 displayed higher ordered SB phase. The mesophase range of these compounds measured by DSC is 25℃ - 100℃. The TGA results showed that the thermal decomposition temperatures of these compounds were higher than 200℃.
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