The synthesis of a novel supramolecular system comprising of branched polyethylenimine and cyclodextrin, is presented. The synthesis route is based on the self-assembly phenomena with the inclusion of solvent molecules. The systems are formed by a hydrogen-bonding network and host–guest type interactions between the building blocks. It was found that the native cyclodextrin and polyethylenimine are able to form stable systems when the reaction medium constitutes a polar solvent forming host–guest type complexes with cyclodextrin. A special consideration was paid on the detailed spectroscopic analyses of the obtained water-soluble constructs, including ROESY and diffusion-ordered (DOSY) NMR spectroscopy studies. The versatility and significance of DOSY technique for the analysis of the cyclodextrin complexes and its non-covalent systems with branched polymers, were presented. It was also found that the guest molecules that were incorporated in the complexes exhibited enhanced thermal stability. The morphological details in the solid state were obtained by scanning electron microscope.Graphical Abstract

中文翻译：

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由环糊精和支化聚乙烯亚胺组成的新型非共价稳定超分子三元体系


提出了由支链聚乙烯亚胺和环糊精组成的新型超分子系统的合成。该合成路线基于包含溶剂分子的自组装现象。该系统由氢键网络和构件之间的主客体相互作用形成。研究发现，当反应介质构成极性溶剂时，天然环糊精和聚乙烯亚胺能够形成稳定的体系，与环糊精形成主客体型复合物。特别考虑了所获得的水溶性结构的详细光谱分析，包括 ROESY 和扩散有序 (DOSY) NMR 光谱研究。介绍了 DOSY 技术在分析环糊精复合物及其支化聚合物非共价体系方面的通用性和意义。还发现复合物中掺入的客体分子表现出增强的热稳定性。通过扫描电子显微镜获得固态形态细节。图形摘要