Self-Repairing Complex Helical Columns Generated via Kinetically Controlled Self-Assembly of Dendronized Perylene Bisimides
作者:Virgil Percec、Steven D. Hudson、Mihai Peterca、Pawaret Leowanawat、Emad Aqad、Robert Graf、Hans W. Spiess、Xiangbing Zeng、Goran Ungar、Paul A. Heiney
DOI:10.1021/ja208501d
日期:2011.11.16
The dendronized perylene 3,4:9,10-tetracarboxylic acid bisimide (PBI), (3,4,5)12G1-3-PBI, was recently reported to self-assemble in complex helical columns containing tetramers of PBI as basic repeat unit. These tetramers contain a pair of two molecules arranged side-by-side and another pair in the next stratum of the column turned upside-down and rotated around the column axis. Intra- and intertetramer
最近有报道称树枝状苝 3,4:9,10-四羧酸双酰亚胺 (PBI), (3,4,5)12G1-3-PBI 可在含有 PBI 四聚体作为基本重复单元的复杂螺旋柱中自组装. 这些四聚体包含一对并排排列的两个分子,另一对在柱的下一层中颠倒并围绕柱轴旋转。四聚体内和四聚体间的旋转角度和堆叠距离是不同的。在高温下,(3,4,5)12G1-3-PBI 通过热力学控制过程在 2D 六角柱状相中自组装,而在低温下通过动力学控制过程在 3D 正交柱状阵列中自组装。在这里,我们通过差示扫描量热法、X 射线和电子衍射的组合报告了合成和结构分析,和固态核磁共振在不同温度下对由 (3,4,5)nG1-3-PBI 库生成的超分子结构进行,n = 14-4。对于 n = 11-8,来自低温的动力学控制自组装在热力学控制过程中发生变化,而 n = 9 和 8 的正交柱状阵列从热力学产物转变为动力学产物。n = 9, 8