Kinetically Interlocking Multiple‐Units Polymerization of DNA Double Crossover and Its Application in Hydrogel Formation

A novel kinetically interlocking multiple‐units (KIMU) supramolecular polymerization system with DNA double crossover backbone is designed. The rigidity of DX endows the polymer with high molecular weight and stability. The observed concentration of the formed polymers is insensitive and stable unde...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2021-07, Vol.42 (14), p.n/a
Main Authors: Shi, Jiezhong, Zhu, Chenyou, Li, Qian, Li, Yujie, Chen, Liangxiao, Yang, Bo, Xu, Jiang‐Fei, Dong, Yuanchen, Mao, Chengde, Liu, Dongsheng
Format: Article
Language:English
Subjects:
Deoxyribonucleic acid
DNA
DNA double crossover
DNA hydrogels
Hydrogels
kinetically interlocking multiple units
Locking
Mechanical properties
Molecular weight
Monomers
Phosphodiester bonds
Polymerization
Polymers
Rigidity
Smart materials
Stability
Supramolecular polymers
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Summary:A novel kinetically interlocking multiple‐units (KIMU) supramolecular polymerization system with DNA double crossover backbone is designed. The rigidity of DX endows the polymer with high molecular weight and stability. The observed concentration of the formed polymers is insensitive and stable under ultralow monomer concentration owing to the KIMU interactions, in which multiple noncovalent interactions are connected by the phosphodiester bonds. Furthermore, a pH‐responsive DNA supramolecular hydrogel is constructed by introducing a half i‐motif domain into the DNA monomer. The rigidity of DNA polymer endows the hydrogel with high mechanical strength and low gelation concentration. This study enriches the KIMU strategy and offers a simple but effective way to fabricate long and stable supramolecular polymers by balancing the reversibility and stability. It also shows great potentials to construct next generation of smart materials, such as DNA nanostructures, DNA motors, and DNA hydrogels. A kinetically interlocking multiple‐units supramolecular polymer with DNA double crossover backbone is prepared. The rigidity of DNA double crossover structure endows the polymers with high molecular weight and stability. Furthermore, this DX polymer can also be used to fabricate DNA supramolecular hydrogels with high mechanical strength.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.202100182