氨基环丙烯鎓盐的自组装：通往三角离子液晶的途径
Self-Assembly of Aminocyclopropenium Salts: En Route to Deltic Ionic Liquid Crystals.
作者信息
Litterscheidt Juri, Bandar Jeffrey S, Ebert Max, Forschner Robert, Bader Korinna, Lambert Tristan H, Frey Wolfgang, Bühlmeyer Andrea, Brändle Marcus, Schulz Finn, Laschat Sabine
机构信息
Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany.
Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA.
出版信息
Angew Chem Int Ed Engl. 2020 Jun 22;59(26):10557-10565. doi: 10.1002/anie.202000824. Epub 2020 Apr 7.
Aminocyclopropenium ions have raised much attention as organocatalysts and redox active polymers. However, the self-assembly of amphiphilic aminocyclopropenium ions remains challenging. The first deltic ionic liquid crystals based on aminocyclopropenium ions have been developed. Differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction provided insight into the unique self-assembly and nanosegregation of these liquid crystals. While the combination of small headgroups with linear p-alkoxyphenyl units led to bilayer-type smectic mesophases, wedge-shaped units resulted in columnar mesophases. Upon increasing the size and polyphilicity of the aminocyclopropenium headgroup, a lamellar phase was formed.
氨基环丙烯鎓离子作为有机催化剂和氧化还原活性聚合物备受关注。然而，两亲性氨基环丙烯鎓离子的自组装仍然具有挑战性。基于氨基环丙烯鎓离子的首个三角离子液晶已被开发出来。差示扫描量热法、偏光显微镜和X射线衍射为这些液晶独特的自组装和纳米相分离提供了深入见解。虽然小的头基与线性对烷氧基苯基单元的组合导致了双层型近晶相，楔形单元则产生了柱状相。随着氨基环丙烯鎓头基尺寸和多亲性的增加，形成了层状相。
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