期刊
LIQUID CRYSTALS
卷 31, 期 2, 页码 207-213出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678290310001642522
关键词
-
Two homologous series of azamacrocyclic n-alkylsulphates were synthesized and characterized. Their thermotropic liquid crystalline behaviour was studied by differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction. At room temperature both series exhibited lamellar crystalline phases. For the tetraazacyclotetradecane alkylsulphate salts a highly ordered smectic phase was observed following their melting. The triazacyclododecane derivatives however melted into disordered smectic A phases, apparently due to the less symmetric polar group which does not favour in-layer organization. Extensive hydrogen bonding was observed in the crystalline phases of both series of compounds as well as above their melting into smectic phases, albeit rather weak in the case of the triaza derivatives.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据