Concentration insensitive supramolecular polymerization enabled by kinetically interlocking multiple-units strategy

J Shi, H Jia, H Chen, X Wang, JF Xu, W Ren… - CCS …, 2019 - chinesechemsoc.org
J Shi, H Jia, H Chen, X Wang, JF Xu, W Ren, J Zhao, X Zhou, Y Dong, D Liu
CCS Chemistry, 2019chinesechemsoc.org
We proposed and demonstrated a kinetically interlocking multiple-units supramolecular
polymerization strategy. Through rationally designed multiple-units monomers, the degree of
polymerization (X w) detected was more than 50 with a polydispersity index of∼ 1.4. The
prepared polymers were stable when diluted to 20 μM or lower concentrations. By
introducing the cooperative effects of multiunit interactions into a traditional condensation
polymerization model, we found that the relationship between the concentration and the X w …
We proposed and demonstrated a kinetically interlocking multiple-units supramolecular polymerization strategy. Through rationally designed multiple-units monomers, the degree of polymerization (Xw) detected was more than 50 with a polydispersity index of ∼1.4. The prepared polymers were stable when diluted to 20 μM or lower concentrations. By introducing the cooperative effects of multiunit interactions into a traditional condensation polymerization model, we found that the relationship between the concentration and the Xw was heavily influenced by the unit number involved in the kinetic interlocking. Factors that influenced the Xw and their distributions were studied systematically, and all the results matched the theoretical predictions excellently. This strategy provides novel insight into supramolecular polymerization and offers a simple but effective way to improve positive correlation of the reversibility and stability of supramolecular interactions in polymer assembly.
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