【摘要】 设计合成了新的负性液晶双—（对烷基苯甲酸）—2,3—二氯—1,4—苯二酚酯类化合物,其结构为这里R·CH₃,C₂H₃,n—C₄H₉和n—C₇H₁₅.合成了相应的一些中间体,测定了液晶的相变温度和相态,通过磁场法,测定了R=CH2的介电各向异性.更多还原

【Abstract】 The C_1,2,4,7 members of the Series of 2,3-dichloro - P- Phenylene-bis-（P’ -alkylbenzoates ） have beendisigned and prepared. The structure is as follows:where R CH₃, n-C₄H_? and C₇H₁₅. Corresponding intermedia-tes have also been synthesized. By means of magnetic fieldmethod, the value of dielectric anisotropy of C₁ compoundhas been determined. By use of polarizing micro-melting pointapparatus, the transition temperatures and types of liquidcrystal phase of these compound ; have been determined.更多还原