Ordered nanoassemblies from self-assembly of amphiphilic molecule containing pillar[5]arene and azobenzene groups

IF 2.9 4区 化学 Q2 POLYMER SCIENCE
Peng Liu, Yingying Deng, Jie Lu, Xiaoliang Gou, Qingqing Han, Yi-Rong Pei, Long Yi Jin
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引用次数: 0

Abstract

The derivatization of pillar[n]arenes is a prerequisite for endowing them with functions, as well as enriching the application of pillar[n]arene materials in advanced material science. Herein, we report the self-assembly of amphiphilic rim-differentiated pillar[5]arene (H1). One side of the pillar[5]arene is composed of hydrophilic poly(ethylene oxide) chains, benzene and azobenzene groups connected with ether bonds, and the other side is composed of ethoxy groups. In CHCl3 solvent, the amphiphile H1 self-assembled into spherical micelles, while in H2O/THF mixed solvent H1 self-assembled into nanorod-like assemblies. Interestingly, addition of a guest molecule composed of tetraphenylethene and hexanenitrile groups (G1) to the CHCl3 solution of H1 produces large sheet aggregates via the strong ππ stacking of rod segments. The reversible transformation between the nanosheet assemblies of host–guest complexes and nanoparticles is achieved by addition of the guest molecule 1,4-butylamine (G2) and pillar[5]arene with ethoxy groups as competitive molecules. Notably, worm-like and nanorod micelles of H1 were constructed in H2O/THF solution triggered by light irradiation, which assemblies can be used as photosensitive erasable writing materials. © 2023 Society of Industrial Chemistry.

Abstract Image

含有柱[5]炔和偶氮苯基团的两亲分子自组装产生的有序纳米组合体
柱[n]炔的衍生化是赋予其功能的先决条件,同时也丰富了柱[n]炔材料在先进材料科学中的应用。在此,我们报告了两亲边缘分化柱[5]炔(H1)的自组装。柱[5]炔的一面由亲水性聚(环氧乙烷)链、以醚键连接的苯和偶氮苯基团组成,另一面为乙氧基基团。在 CHCl3 溶剂中,双亲化合物 H1 自组装成球形胶束,而在 H2O/THF 混合溶剂中,H1 则自组装成纳米棒状集合体。有趣的是,在 H1 的 CHCl3 溶液中加入由四苯基乙烯和己腈基团组成的客体分子(G1),通过杆段的强π-π堆叠作用产生大片状聚集体。通过加入客体分子 1,4-丁胺(G2)和带有乙氧基的支柱[5]炔作为竞争分子,实现了主-客体复合物纳米片集合体和纳米颗粒之间的可逆转变。值得注意的是,在 H2O/THF 溶液中,H1 的蚯蚓状胶束和纳米棒状胶束在光照射下被构建出来,这种胶束可用作光敏可擦书写材料。
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来源期刊
Polymer International
Polymer International 化学-高分子科学
CiteScore
7.10
自引率
3.10%
发文量
135
审稿时长
4.3 months
期刊介绍: Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.
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