文献类型：期刊文献

英文题名：Morphologically Tunable Rectangular Platelets Self-Assembled from Diblock Molecular Brushes Containing Azopyridine Pendants

作者：Yao, Yuan[1];Zhang, Lu[1];Zhang, Sen[2];Huang, Xiaoyu[2];Feng, Chun[1];Lin, Shaoliang[1];Xu, Binbin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Univ Chinese Acad Sci, Shanghai Inst Organ Chem, Key Lab Synthet & Selfassembly Chem Organ Funct Mo, Shanghai 200032, Peoples R China

年份：2023

卷号：39

期号：51

起止页码：18880

外文期刊名：LANGMUIR

收录：;EI(收录号：20235115247199);WOS:【SCI-EXPANDED(收录号:WOS:001132958300001)】；

基金：The authors are thankful for financial support from National Science Foundation for Distinguished Young Scholars (51825304), National Natural Science Foundation of China (52122314, 52073092, 52273008, U22A20131, and 22001072), Shanghai Scientific and Technological Innovation Project (22ZR1479300, 21ZR1481700, 20ZR1415600, and 22JC1401000 ), Shanghai Rising-Star Program (23QA1402500), and "Chen Guang" Project (20CG38).

语种：英文

外文关键词：Atom transfer radical polymerization - Polyethylene glycols - Solvents

摘要：Two-dimensional (2D) platelet structures are of growing importance as building blocks for the preparation of optical and electrical devices. However, the creation of morphologically tunable rectangular platelets through polymer self-assembly still remains a challenge. Herein, we describe a rational strategy for the fabrication of 2D rectangular platelets by stacking azopyridine-containing diblock molecular brushes in two dimensions in a selective solvent. Amphiphilic PEG-co-(PtBA-g-PAzoPy) DMBs with poly-(ethylene glycol) (PEG) block, poly-(t-butyl acrylate) (PtBA) backbone, and poly-(6-(4-(4-pyridyazo)-phenoxy)-hexyl methacrylate) (PAzoPy) brush were synthesized by sequential reversible addition-fragmentation chain transfer polymerization and atom transfer radical polymerization. Various rectangular platelets were obtained via the solution self-assembly of PEG-co-(PtBA-g-PAzoPy) through a heating-cooling-aging process in which the morphology and size of platelets could be controlled by adjusting the composition of DMBs as well as the solvent polarity. In addition, we investigated the metal chelation ability and H-bonding-assisted co-assembly capability of PEG-co-(PtBA-g-PAzoPy). The results displayed that 2D hybrids and flower-like platelets were formed, respectively. Our study presents an efficient method to fabricate rectangular platelets with tunable morphologies.