Supermolecular chiral mesogenic tripedes.
Supermolecular chiral mesogenic tripedes.
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DOI：
10.1002/chem.201102193
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
A. Belaissaoui;I. Sáez;S. Cowling;X. Zeng;J. Goodby
中科院分区：
文献类型：
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作者：
A. Belaissaoui;I. Sáez;S. Cowling;X. Zeng;J. Goodby
合成了一系列新型手性液晶三脚糖和甘露糖苷衍生物G(N)和M(N)(n=1~3)。内核由甲基α-D-葡萄糖苷G或甲基α-D-甘露糖苷M组成，在C6位上区域选择性官能化，带有叔丁基二甲基硅基、羟基或羧酸部分。这些核心可以获得几种柔性构象，通过柔性己酰基间隔物连接到棒状的偏爱氰基二联苯的单元上。这些糖基超分子具有手性向列相(N*)和近晶A相(SMA)。讨论了核手性和官能团对热性能和介晶性能的联合影响。
A novel series of chiral liquid crystalline tripedes Glucoside and Mannoside derivatives G(n) and M(n) (n=1-3) have been synthesised. The inner cores consist of methyl α-D-Glucoside G or methyl α-D-Mannoside M, regioselectively functionalised at the less hindered position C6, with tert-butyldimethylsilyl (TBDMS), hydroxyl or carboxylic acid moieties. The cores, which can acquire several flexible conformations, are attached to rod-like smectogenic-preferring cyanobiphenyl units, by means of a flexible hexanoyl spacer. These Glyco-Supermolecules exhibit chiral nematic (N*) and smectic A (SmA) phases. The combined effects of core chirality and functional groups on thermal and mesomorphic characteristics are discussed.