Controlled self-assembly triggered by olefin metathesis:: Cross-linked graphitic nanotubes from an amphiphilic hexa-peri-hexabenzocoronene

被引:94
作者
Jin, W
Fukushima, T
Kosaka, A
Niki, M
Ishii, N
Aida, T
机构
[1] Natl Museum Emerging Sci & Innovat, Japan Sci & Technol Agcy, JST,Aida Nanospace Project, ERATO,Koto Ku, Tokyo 1350064, Japan
[2] Natl Inst Adv Ind Sci & Technol, AIST, Biol Informat Res Ctr, Tsukuba, Ibaraki 3058566, Japan
[3] Univ Tokyo, Sch Engn, Dept Chem & Biotechnol, Bunkyo Ku, Tokyo 1138656, Japan
关键词
D O I
10.1021/ja051859p
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Acyclic diene metathesis (ADMET) in CH2Cl2 of a Gemini-shaped nonionic hexabenzocoronene amphiphile (2), bearing triethylene glycol chains with terminal allylic functionalities, resulted in spontaneous formation of graphitic nanotubes with a cross-linked surface. Without ADMET, 2 did not self-assemble to form a tubular structure due to a high solubility in CH2Cl2. Although 2 formed nanotubes in THF, ADMET on the surface of the preformed nanotubes in THF proceeded only sluggishly and resulted in partial disruption of the tubular structure. The cross-linked nanotubes showed a softening temperature (244 °C) higher than that of the uncross-linked version (195 °C) and preserved their hollow structure much longer upon heating. Copyright © 2005 American Chemical Society.
引用
收藏
页码:8284 / 8285
页数:2
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