Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India.
Chemistry. 2010 Jul 12;16(26):7796-802. doi: 10.1002/chem.200902816.
Sterically-engineered rigid trigonal molecular modules based on 1,3,5-tri(4-hydroxyphenyl)benzenes H1 and H2 undergo O-H...O hydrogen-bonded self-assembly into eight-fold catenated hexagonal (6,3) and two-fold interpenetrated undulated square (4,4) networks, respectively. In the presence of [18]crown-6 as a guest, the triphenol H1 is found to self-assemble into a honeycomb network with hexagonal voids created between three triphenol building blocks. The guest [18]crown-6 molecules are found to be nicely nested in hexagonal enclosures. The empty spaces within the crowns can be further filled with neutral (MeOH/water, MeOH/MeNO(2)) or ionic guest species such as KI/KAcAc to furnish novel multicomponent assemblies, that is, guest subset guest subset host, that typify Russian dolls. In contrast, triphenol H2 is found to yield analogous multicomponent molecular crystals in which the guest crown-K(+) acts as a spacers in the hydrogen-bonded self-assembly that leads to distorted chicken wire networks.
基于 1,3,5-三(4-羟基苯基)苯 H1 和 H2 的立体工程刚性三角分子模块通过 O-H…O 氢键自组装分别形成八重轮辋式六边形（6,3）和双重穿插的波纹正方形（4,4）网络。在[18]冠醚-6 作为客体的存在下，三苯酚 H1 被发现自组装成具有由三个三苯酚构建块之间形成的六边形空隙的蜂窝网络。客体[18]冠醚-6 分子被发现很好地嵌套在六边形封套中。冠醚内的空隙可以进一步用中性（MeOH/水、MeOH/MeNO2）或离子客体物种如 KI/KAcAc 填充，以提供新型的多组分组装体，即客体子集-客体子集-主体，这代表俄罗斯套娃。相比之下，三苯酚 H2 被发现产生类似的多组分分子晶体，其中客体冠醚-K(+) 作为氢键自组装中的间隔物，导致扭曲的铁丝网网络。
