Smectic A Formation by Twin Dimers Assuming U-shaped Conformation
Smectic A Formation by Twin Dimers Assuming U-shaped Conformation
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DOI：
10.1246/cl.2008.880
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发表时间：
2008-07
影响因子：
1.6
通讯作者：
Yusuke Naito;R. Ishige;M. Itoh;M. Tokita;J. Watanabe
中科院分区：
文献类型：
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作者：
Yusuke Naito;R. Ishige;M. Itoh;M. Tokita;J. Watanabe
当烷基尾碳原子数大于12时，具有3-甲基戊烷间隔基的孪晶二聚体表现为U形（折叠）分子，并形成SA相。这种行为是在相反的线性戊烷间隔的二聚体，采取扩展的构象，并形成反铁电SCA B。因此，双分子的折叠是另一种容纳尾基比间隔基长得多的方法，这表明了自发分子组织的新潜力。
Twin dimers with 3-methylpentane spacers behave as U-shaped (folding) molecules if the carbon number of alkyl tail group is longer than 12 and form an S A phase. This behavior is in contrast to that in dimers with linear pentane spacers which assume extended conformation and form the antiferroelectric S CA b . Folding of twin molecules, hence, is another way to accommodate tail groups fairly longer than the spacers, suggesting new potentiality in spontaneous molecular organization.