Mechanically interlocked two-dimensional polymers

作     者：Bardot, Madison I. Weyhrich, Cody W. Shi, Zixiao Traxler, Michael Stern, Charlotte L. Cui, Jinlei Muller, David A. Becker, Matthew L. Dichtel, William R. 

作者机构：Northwestern Univ Dept Chem Evanston IL 60208 USA Duke Univ Dept Chem Durham NC USA Cornell Univ Dept Chem & Chem Biol Ithaca NY USA Cornell Univ Sch Appl & Engn Phys Ithaca NY USA Cornell Univ Kavli Inst Cornell Nanoscale Sci Ithaca NY USA Duke Univ Thomas Lord Dept Mech Engn & Mat Sci Dept Biomed Engn Durham NC USA Duke Univ Dept Orthoped Surg Durham NC USA 

出 版 物：《SCIENCE》 (Sci.)

年 卷 期：2025年第387卷第6731期

页      面：264-269页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：Kavli Institute at Cornell, Cornell University, KIC Weill Institute International Institute for Nanotechnology, Northwestern University, IIN North Carolina Research Triangle Nanotechnology Network Cornell University, CU Defense Advanced Research Projects Agency, DARPA, (HR00112320041) Defense Advanced Research Projects Agency, DARPA National Cancer Institute, NCI, (P30 CA060553) National Cancer Institute, NCI National Science Foundation, NSF, (ECCS-2025633) National Science Foundation, NSF National Institutes of Health, NIH, (1S10RR019071-01A1, 1S10OD012016-01) National Institutes of Health, NIH Forschungskreis der Ernährungsindustrie, FEI, (ECCS-2025064) Forschungskreis der Ernährungsindustrie, FEI Northwestern University, NU, (MRI-1429155, DMR-2039380, DMR-1719875) Northwestern University, NU 

摘      要：Mechanical bonds arise between molecules that contain interlocked subunits, such as one macrocycle threaded through another. Within polymers, these linkages will confer distinctive mechanical properties and other emergent behaviors, but polymerizations that form mechanical bonds efficiently and use simple monomeric building blocks are rare. In this work, we introduce a solid-state polymerization in which one monomer infiltrates crystals of another to form a macrocycle and mechanical bond at each repeat unit of a two-dimensional (2D) polymer. This mechanically interlocked 2D polymer is formed as a layered solid that is readily exfoliated in common organic solvents, enabling spectroscopic characterization and atomic-resolution imaging using advanced electron microscopy techniques. The 2D mechanically interlocked polymer is easily prepared on multigram scales, which, along with its solution processibility, enables the facile fabrication of composite fibers with Ultem that exhibit enhanced stiffness and strength.