Dynamic Supramolecular Polymers Based on Benzene-1,3,5-tricarboxamides: The Influence of Amide Connectivity on Aggregate Stability and Amplification of Chirality
作者:Patrick J. M. Stals、Jeffrey C. Everts、Robin de Bruijn、Ivo A. W. Filot、Maarten M. J. Smulders、Rafael Martín-Rapún、Evgeny A. Pidko、Tom F. A. de Greef、Anja R. A. Palmans、E. W. Meijer
DOI:10.1002/chem.200902635
日期:2010.1.18
that of their carbonyl (CO)‐centred counterparts, with the exception that aggregation is weaker and amplification of chirality is less pronounced. The differences in the self‐assembly of N‐ and CO‐BTAs were analysed by density functional theory (DFT) calculations. These reveal a substantially lower interaction energy between the monomeric units in the supramolecular polymers of N‐BTAs. The lower interaction
合成了由手性和非手性烷基取代基组成的N-中心苯-1,3,5-三甲苯酰胺(N-BTA),并研究了它们在稀烷烃溶液中的固态行为和自组装性。差示扫描量热法(DSC),偏振光学显微镜(POM)和X射线衍射的结合表明,具有支链3,7-二甲基辛酰基链的手性N-BTA衍生物是液晶的,中间相被指定为Col ho。相反,具有直链十四烷酰基或辛酰基链的N-BTA衍生物缺乏中间相,并以结晶化合物形式获得。可变温度红外光谱显示手性N-BTA中间相中相邻分子之间存在三重分子间氢键。在室温下的结晶状态下,观察到分子之间的堆积更为复杂。在N-BTA稀溶液上进行的紫外和圆二色谱分析表明,当存在手性烷基链时,N-BTA分子具有良好的螺旋性,并且具有良好的螺旋性,且N-BTA分子具有协同的自组装行为。军士和士兵以及多数规则都在N-BTA堆栈中有效。实际上,N-BTA的自组装与以羰基(CO)为中心的自组装极为相似,不同之处在