Thermotropic liquid crystalline ionic stilbazoles and their miscible mixtures with non-ionic carbazolyl compounds
Thermotropic liquid crystalline ionic stilbazoles and their miscible mixtures with non-ionic carbazolyl compounds
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热致液晶离子芪唑及其与非离子咔唑基化合物的混溶混合物
DOI：
10.1080/02678299508036678
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发表时间：
1995
期刊：
影响因子：
2.2
通讯作者：
T. Uryu
中科院分区：
文献类型：
--
作者：
Y. Kosaka;Takashi Kato;T. Uryu
摘要 以反式4-硝基-4'-芪唑和卤代烷为原料制备了新型热致离子液晶。含有7至10个碳的烷基链的反式-N-烷基-4-硝基-4'-芪唑溴化物和含有5至10个碳的烷基链的氯化物同系物表现出近晶相。例如，反式-N-癸基-4-硝基-4'-溴化芪唑鎓和反式-N-己基-4-硝基-4'-氯化芪唑鎓分别在175至186°C和129至190°C之间显示近晶相。中间相的温度范围随着抗衡阴离子尺寸的减小而增加。通过差示扫描量热法和偏光显微镜检查了反式-N-烷基-4-硝基-4'-溴化芪唑鎓在具有各种负电性基团的席夫碱化合物中的混溶性。由反式-N-烷基-4-硝基-4'-溴化芪唑鎓和4-烷氧基-N-(9-甲基-2-咔唑基-亚甲基)苯胺制备可混溶的二元混合物。反式-N-己基-4-硝基-4'-溴化芪唑的1:1（摩尔比）二元混合物...
Abstract New thermotropic ionic liquid crystals were prepared from trans-4-nitro-4′-stilbazole and alkyl halides. trans-N-Alkyl-4-nitro-4′-stilbazolium bromides containing alkyl chains with 7 to 10 carbons and the chloride homologues containing alkyl chains with 5 to 10 carbons exhibited smectic phases. For example, trans-N-decyl-4-nitro-4′-stilbazolium bromide and trans-N-hexyl-4-nitro-4′-stilbazolium chloride showed smectic phases from 175 to 186°C and from 129 to 190°C, respectively. The temperature range of mesophases increased with decreasing size of the counteranions. The miscibility of trans-N-alkyl-4-nitro-4′-stilbazolium bromide in Schiff's base compounds having various electronegative groups was examined by differential scanning calorimetry and polarizing microscopy. Miscible binary mixtures were prepared from trans-N-alkyl-4-nitro-4′-stilbazolium bromides and 4-alkoxy-N-(9-methyl-2-carbozolyl-methylene)anilines. The 1:1 (mole ratio) binary mixture of trans-N-hexyl-4-nitro-4′-stilbazolium bromid...