Ikeda Masato, Nobori Tadahito, Schmutz Marc, Lehn Jean-Marie
Laboratoire de Chimie Supramoléculaire, ISIS, Université Louis Pasteur, 8, allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France.
Chemistry. 2005 Jan 7;11(2):662-8. doi: 10.1002/chem.200400826.
The bow-shaped molecule 1 bearing a self-complementary DAAD-ADDA (D=donor A=acceptor) hydrogen-bonding array generates, in hydrocarbon solvents, highly ordered supramolecular sheet aggregates that subsequently give rise to gels by formation of an entangled network. The process of hierarchical self-assembly of compound 1 was investigated by the concentration and temperature dependence of UV-visible and (1)H NMR spectra, fluorescence spectra, and electron microscopy data. The temperature dependence of the UV-visible spectra indicates a highly cooperative process for the self-assembly of compound 1 in decaline. The electron micrograph of the decaline solution of compound 1 (1.0 mM) revealed supramolecular sheet aggregates forming an entangled network. The selected area electronic diffraction patterns of the supramolecular sheet aggregates were typical for single crystals, indicative of a highly ordered assembly. The results exemplify the generation, by hierarchical self-assembly, of highly organized supramolecular materials presenting novel collective properties at each level of organization.
带有自互补DAAD - ADDA（D = 供体，A = 受体）氢键阵列的弓形分子1在烃类溶剂中生成高度有序的超分子片状聚集体，这些聚集体随后通过形成缠结网络而形成凝胶。通过紫外可见光谱和（1）H NMR光谱、荧光光谱以及电子显微镜数据对化合物1的分级自组装过程进行了浓度和温度依赖性研究。紫外可见光谱的温度依赖性表明化合物1在十氢化萘中自组装是一个高度协同的过程。化合物1（1.0 mM）的十氢化萘溶液的电子显微镜照片显示超分子片状聚集体形成了缠结网络。超分子片状聚集体的选区电子衍射图案是单晶的典型图案，表明组装高度有序。这些结果例证了通过分级自组装生成高度组织化的超分子材料，这些材料在组织的每个层次上都呈现出新颖集体性质。
