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多样性自组装体在混合时,通常表现出互不干扰的自分类性,能高度选择性地自分类堆积.但结构极为相似的组装子在相互混合时,会发生交互作用并表现出重组现象.文中合成和观测了具有芳香环边墙和不同酰胺侧链的C型甘脲分子夹为组装单元的混合组装行为.研究发现,此类分子在各自以单一态物质溶解于CDCl3时,能通过π-π相互作用和氢键形成二聚自组装体;若将两种具有不同酰胺侧链的C型甘脲分子夹两两混合,从理论上推测应有三种二聚自组装堆积态存在:A·A、B·B、A·B.但经1HNMR分析发现了一个有趣的现象,即当酰胺侧链上的取代基R′分别为具有C-H结构(如1和2)与PhF5基(5)的组装体两两混合时,二聚组装主要呈现出高度选择性杂化重组的A·B结构态.这种取代基控制的高选择性重组行为可能是基于π-π相互作用、N—H···O氢键,以及C—H…π等三重作用力的协同结果.
Diverse self-assemblies usually exhibit self-classification without disturbing when mixed, and can be self-sorted highly selectively, but the assemblies with similar structures interact and recombine with each other In this paper, we have synthesized and observed the mixed assembly behavior of C-type glycoluril molecules with the aromatic ring side wall and different amide side chains as the assembly unit.It has been found that when such molecules are dissolved in CDCl3 by their monomeric materials, π-π interaction and hydrogen bond formation dimerization self-assembly; if two kinds of C-type glycoluril molecules with different amide side chains sandwiched by two mixed, it is theoretically supposed that there should be three kinds of dimerization self-assembly accumulation state exist: A · A, B · B, A · B. However, an interesting finding by 1H NMR analysis is that when the substituent R ’on the amide side chain is a group having the CH structure (eg, 1 and 2) and the PhF5 group ) Assembly, the dimerization assembly mainly shows the structure of A · B with highly selective hybridization and recombination.The highly selective recombination behavior controlled by this substituent may be based on π-π interaction, N- H ··· O hydrogen bonds, and C-H ... π triple effect of synergistic results .