文献类型：期刊文献

英文题名：Unusual Endotaxy Growth of Hexagonal Nanosheets by the Self-Assembly of a Homopolymer

作者：Gao, Chenchen[1];Sun, Hui[1];Du, Jianzhong[2,3,4]

机构：[1]Ningxia Univ, State Key Lab High Efficiency Coal Utilizat & Gre, Sch Chem & Chem Engn, Yinchuan 750021, Ningxia, Peoples R China;[2]Tongji Univ, Translat Res Inst Brain & Brain Like Intelligence, Dept Obstet & Gynaecol,Shanghai Key Lab Anesthesi, Clin Res Ctr Anesthesiol & Perioperat Med,Sch Med, Shanghai 200434, Peoples R China;[3]Tongji Univ, Sch Mat Sci & Engn, Dept Polymer Mat, 4800 Caoan Rd, Shanghai 201804, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：64

期号：7

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20250217662255);WOS:【SCI-EXPANDED(收录号:WOS:001427865900018)】；

基金：This project is supported by the National Natural Science Foundation of China (22301152, U22A20119, 21925505, and 22335005), National Key R&D Program of China (2022YFC2402900), Innovation Program of Shanghai Municipal Education Commission (2023ZKZD28), the Natural Science Foundation of Ningxia (2024AAC05030) and the Ningxia Scientific Research Foundation for High-level Talents (2023BSB03062). H.S. thanks the Ningxia Youth Talent Support Project of Science and Technology and Young Scholars of Western China of CAS. J.D. is a recipient of National Science Fund for Distinguished Young Scholars.

语种：英文

外文关键词：Homopolymer; Crystallization; Self-Assembly; Endotaxy Growth

摘要：A classical crystallization usually grows epitaxially from a crystal nucleus. Presented in this study is an unusual endotaxy growth manner of a crystalline homopolymer to form hexagonal nanosheets. The amphiphilic homopolymer, poly(3-(4-(phenyldiazenyl)phenoxy)propyl methacrylate) (PAzoPMA), is first annealed in isopropanol to afford a hexagonal nut-like structure. Then, the PAzoPMA crystallizes from the inner wall to the center to form a thin bottom, which grows upwards along the bottom, leading to the formation of the evenly hexagonal nanosheets. The energy fluctuation by molecular dynamics (MD) simulation during self-assembly confirms the packing state of PAzoPMA chains in different solvents. In isopropanol, the total energy is the lowest, demonstrating the tight regular arrangement of polymer chains. In addition, the non-bonding interaction energy is also the lowest, leading to the favorable contact with solvent molecules and the formation of hexagonal nanosheets. Otherwise, nanowires and giant large compound micelles are formed in ethanol and n-butanol, respectively. Overall, an unusual endotaxy crystallization manner of an amphiphilic homopolymer is observed during the preparation of hexagonal nanosheets, which brings fresh insight for understanding the crystallization behavior of polymers and preparing functional soft nanomaterials.