烯烃复分解引发的可控自组装：基于两亲性六并苯并蔻的交联石墨纳米管

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

作者信息

Jin Wusong, Fukushima Takanori, Kosaka Atsuko, Niki Makiko, Ishii Noriyuki, Aida Takuzo

机构信息

Aida Nanospace Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), National Museum of Emerging Science and Innovation, 2-41 Aomi, Koto-ku, Tokyo 135-0064, Japan.

出版信息

J Am Chem Soc. 2005 Jun 15;127(23):8284-5. doi: 10.1021/ja051859p.

DOI:10.1021/ja051859p

PMID:15941252

Abstract

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 degrees C) higher than that of the uncross-linked version (195 degrees C) and preserved their hollow structure much longer upon heating.

摘要

带有末端烯丙基官能团的三甘醇链的双子型非离子型六苯并蔻两亲分子（2）在二氯甲烷中进行开环易位聚合（ADMET），导致形成具有交联表面的石墨纳米管。没有进行ADMET时，由于在二氯甲烷中溶解度高，2不会自组装形成管状结构。尽管2在四氢呋喃中形成了纳米管，但在四氢呋喃中预先形成的纳米管表面上进行的ADMET反应非常缓慢，导致管状结构部分破坏。交联纳米管的软化温度（244℃）高于未交联版本（195℃），并且在加热时保持其空心结构的时间更长。