Key Laboratory of Materials Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
Angew Chem Int Ed Engl. 2022 Jun 13;61(24):e202203505. doi: 10.1002/anie.202203505. Epub 2022 Apr 11.
Molecular weight has an important bearing on the properties of supramolecular polymers. However, the intuitive differentiation of the molecular weight of supramolecular polymers remains challenging. Given this situation, establishing a reliable relationship between fluorescence properties and molecular weight may be a promising strategy. Herein, we prepared a supramolecular monomer M1 with aggregation-induced ratiometric emission characteristics. With the increasing M1 concentration (0.100-100 mM), the average degree of polymerization (DP ) rose from 1.00 to 293. Meanwhile, the color changed from dark blue to cyan, finally to yellow-green in the same concentration range. Hence, the intuitive relationship between DP and fluorescence colors was constructed, allowing the visual differentiation of molecular weight. Moreover, the fluorescence color could be regulated by introducing a competitive molecule to induce the depolymerization of supramolecular polymers.
分子量对超分子聚合物的性质有重要影响。然而，直观地区分超分子聚合物的分子量仍然具有挑战性。鉴于这种情况，建立荧光性质与分子量之间的可靠关系可能是一种有前途的策略。在这里，我们制备了具有聚集诱导比率荧光特性的超分子单体 M1。随着 M1 浓度（0.100-100 mM）的增加，平均聚合度（DP）从 1.00 增加到 293。同时，在相同浓度范围内，颜色从深蓝色变为天蓝色，最后变为黄绿色。因此，构建了 DP 与荧光颜色之间的直观关系，实现了分子量的可视化区分。此外，通过引入竞争分子诱导超分子聚合物解聚，可以调节荧光颜色。
