Nanosphere and nanonetwork formations of [60]fullerene-end-capped stereoregular poly(methyl methacrylate)s through stereocomplex formation combined with self-assembly of the fullerenes

被引：0

作者：

Kawauchi, Takehiro ^{[1
]}

Kumaki, Jiro ^{[1
]}

Yashima, Eiji ^{[1
,2
]}

机构：

[1] Yashima Super-Structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), 101 Creation Core, Moriyama-ku, Nagoya 463-0003, Japan

[2] Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan

来源：

Journal of the American Chemical Society | 2006年 / 128卷 / 32期

关键词：

We report a novel and versatile method for constructing a supramolecular nanosphere and nanonetwork based on isotactic and syndiotactic C 60-end-capped poly(methyl methacrylate)s (it- and st-PMMA-C 60's) through their stereocomplex formation combined with self-assembly of the terminal C60. The stereoregular PMMA-C 60's with a precisely controlled structure including molecular weight; its distribution; tacticity; and the chain-end structure were synthesized by the stereospecific anionic living polymerizations of methyl methacrylate followed by end-capping with C60; and their structures were proven by size exclusion chromatography; NMR; UV-vis; and MALDI-TOF-MS analyses. The stereoregular PMMA-C60's self-assembled to form a core-shell aggregate with C60 as the core and the PMMA chains as the shell in H2O/CH3CN (1/9; v/v) due to the solvophobic interaction of the C60 units. These it- and st-PMMA-C60 aggregates further supramolecularly assembled through iterative stereocomplex formation into nanonetworks in which the self-assembled C60 clusters were robustly connected with two- and three-dimensional arrangements. In addition; when the it- and st-PMMA-C60's were simultaneously mixed; self-assembly of the C60 units and stereocomplex formation of the it- and st-PMMA chains took place at once; resulting in the formation of uniformly sized spherical nanoparticles with resistance to heat. Similar nanonetwork architectures can be produced using it-PMMA-C60 clusters and st-PMMA prepolymers as the binder. © 2006 American Chemical Society;

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摘要：

Journal article (JA)

引用

页码：10560 / 10567