Banana-shaped mesogens: effect of lateral substituents on seven-ring esters containing a biphenyl moiety
Banana-shaped mesogens: effect of lateral substituents on seven-ring esters containing a biphenyl moiety
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香蕉形介晶：侧面取代基对含有联苯部分的七环酯的影响
DOI：
10.1080/02678290210160114
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发表时间：
2002
期刊：
影响因子：
2.2
通讯作者：
B. K. Sadashiva
中科院分区：
文献类型：
--
作者：
H. N. S. Murthy;B. K. Sadashiva
本文报道了五个由含联苯的香蕉形分子组成的同系对称化合物的合成和表征。所有这些化合物都是非席夫碱，并且是酯。研究了这些分子侧臂中的氟、甲基和乙基等侧取代基的影响。这些取代基在降低清除温度方面具有很强的影响。在上述系列化合物中观察到香蕉相，如B1、B2和B6。通过偏光显微镜、差示扫描量热法、X射线衍射和电光研究相结合的中间相，其特征在于。
The synthesis and characterization of five homologous series of symmetrical compounds composed of banana-shaped molecules containing a biphenyl moiety are reported. All these compounds are non-Schiff's bases and are esters. The effects of lateral substituents such as fluoro, methyl and ethyl in the side arms of these molecules are examined. These substituents have a strong influence in reducing the clearing temperatures. Banana phases such as B1, B2 and B6 were observed in the above series of compounds. The mesophases were characterized by a combination of polarizing optical microscopy, differential scanning calorimetry, X-ray diffraction and electro-optic studies.