对超分子聚合物性质调控规律的探索是超分子聚合物化学中的核心问题之一。超分子聚合物的性质受结构因素与非共价键性质两个因素共同控制。然而，这两个因素不但难以精准调控，而且还会相互影响，使对超分子聚合物调控规律的研究成为难点。在前期工作中，申请人发现，有别于多数刺激响应基团的开关型响应，二羧己基紫精与葫芦[7]脲复合物的解离速率常数是随pH改变连续变化的，由此将这类具有连续刺激响应能力的组装基元简称为渐变型组装基元。本项目中，我们设计构筑基于渐变型组装基元的超分子聚合物，实现对超分子聚合物中非共价键解离速率常数定量调控。通过控制超分子聚合物结构变量，进而探究解离速率对超分子聚合物性质的定量调控规律，并实现对超分子聚合物性质的精准调控。

The regulation law of supramolecular polymer’s property is one of the key questions in supramolecular polymer chemistry. Supramolecular polymer’s property is defined by two factors, structure factor of supramolecular polymer and the nature of the non-covalent bond. As it is hard to control each of the factors in a precise manner and the two factors also interact with each other, the exploration of the regulation law of supramolecular polymer’s property remain a challenge. In our previous work, we found that the dissociation rate constant of dicarboxyhexyl viologen/cucurbit[7]uril complex changes gradually following the change of pH. Under a certain range, increase of pH in 1 lead to decrease of rate constant in 10 times. Based on this feature, we named this kind of assembly unit as grade-change assembly unit. In this project, we plan to construct supramolecular polymers with the grade-change assembly unit to achieve quantitative control over the dissociation rate of the non-covalent bond in the supramolecular polymers. Through keeping the structure factor of supramolecular polymer unchanged, we are able to explore the relationship between dissociation rate and supramolecular polymer’s property, and achieve fine-tuning on supramolecular polymer’s property.