Instituto de Ciencia de Materiales de Aragón, Departamento de Química Orgánica. Facultad de Ciencias, Universidad de Zaragoza-CSIC, Campus San Francisco. 50009-Zaragoza (Spain).
Angew Chem Int Ed Engl. 2014 Dec 1;53(49):13449-53. doi: 10.1002/anie.201407705. Epub 2014 Oct 16.
Control of the self-assembly of small molecules to generate architectures with diverse shapes and dimensions is a challenging research field. We report unprecedented results on the ability of ionic, bent dendritic molecules to aggregate in water. A range of analytical techniques (TEM, SEM, SAED, and XRD) provide evidence of the formation of rods, spheres, fibers, helical ribbons, or tubules from achiral molecules. The compact packing of the bent-core structures, which promotes the bent-core mesophases, also occurs in the presence of a poor solvent to provide products ranging from single objects to supramolecular gels. The subtle balance of molecule/solvent interactions and appropriate molecular designs also allows the transfer of molecular conformational chirality to morphological chirality in the overall superstructure. Functional motifs and controlled morphologies can be combined, thereby opening up new prospects for the generation of nanostructured materials through a bottom-up strategy.
控制小分子的自组装以生成具有不同形状和尺寸的结构是一个具有挑战性的研究领域。我们报告了离子、弯曲树枝状分子在水中聚集的前所未有的结果。一系列分析技术（TEM、SEM、SAED 和 XRD）提供了证据，证明手性分子可以形成棒、球、纤维、螺旋带或管。弯曲核结构的紧密堆积，促进了弯曲核中间相的形成，即使在不良溶剂存在的情况下也会发生，从而提供从单个物体到超分子凝胶的产物。分子/溶剂相互作用的微妙平衡和适当的分子设计也允许将分子构象手性转移到整体超结构中的形态手性。功能基元和受控形态可以结合，从而通过自下而上的策略为生成纳米结构材料开辟新的前景。
