从超分子聚合物到超分子有机框架:组装溶液相超分子结构的周期性

单体分子在溶液相自发形成周期性的网络结构,是超分子化学和分子自组装研究领域的重大挑战.多头基分子在溶液相通过分子间非共价键作用可以形成超分子聚合物.提高多头基(三头基和四头基)分子骨架的刚性,可以提高结合位点的结构预组织,进而增强分子间相互作用的协同性和多价性特征,提高自组装结构的有序性或周期性.本文综述了多头基分子自组装形成超分子聚合物的一些重要进展,介绍了二维超分子有机框架(一类新的溶液相周期性自组装网络结构研究的最新进展.

From Supramolecular Polymers to Supramolecular Organic Frameworks:Engineering the Periodicity of Solution-phase Self-assembled Architectures

Formation of periodic networks by molecular building blocks in solution has been a challenge in supramolecular chemistry and self-assembly field. It has been well-established that multitopic building blocks with three or four binding sites can generate supramolecular polymers in solution driven by intermolecular noncovalent interactions. Increasing the rigidity of multitopic building blocks can enhance the preorganization of their binding sites, strengthen the cooperativity and multivalency of intermolecular non-covalent interactions, and increase the ordering or periodicity of their self-assembled architectures. This account summarizes some of the important advance in the construction of supramolecular polymers from multitopic building blocks and our effort in creating two-dimensional (2D) supramolecular organic frameworks (SOFs)-a new family of solution-phase periodic self-assembled networks.