Functionalization of Single-Walled Carbon Nanotubes with Well-Defined Polystyrene by "Click" Coupling
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- 作者：Huaming Li ; Fuyong Cheng ; Andy M. Duft ; and Alex Adronov
- 刊名：Journal of the American Chemical Society
- 出版年：2005
- 出版时间：October 19, 2005
- 年：2005
- 卷：127
- 期：41
- 页码：14518 - 14524
- 全文大小：451K
- 年卷期：v.127,no.41(October 19, 2005)
- ISSN：1520-5126
文摘
Covalent functionalization of alkyne-decorated SWNTs with well-defined, azide-terminatedpolystyrene polymers was accomplished by the Cu(I)-catalyzed [3 + 2] Huisgen cycloaddition. This reactionwas found to be extremely efficient in producing organosoluble polymer-nanotube conjugates, even atrelatively low reaction temperatures (60 
C) and short reaction times (24 h). The reaction was found to bemost effective when a CuI catalyst was employed in the presence of 1,8-diazabicyclo[5.4.0]undec-7-eneas an additive. IR spectroscopy was utilized to follow the introduction and consumption of alkyne groupson the SWNTs, and Raman spectroscopy evidenced the conversion of a high proportion of sp2 carbons tosp3 hybridization during alkyne introduction. Thermogravimetric analysis indicated that the polymer-functionalized SWNTs consisted of 45% polymer, amounting to approximately one polymer chain for every200-700 carbons of the nanotubes, depending on polymer molecular weight. Transmission electronmicroscopy and atomic force microscopy were utilized to image polymer-functionalized SWNTs, showingrelatively uniform polymer coatings present on the surface of individual, debundled nanotubes.
C) and short reaction times (24 h). The reaction was found to bemost effective when a CuI catalyst was employed in the presence of 1,8-diazabicyclo[5.4.0]undec-7-eneas an additive. IR spectroscopy was utilized to follow the introduction and consumption of alkyne groupson the SWNTs, and Raman spectroscopy evidenced the conversion of a high proportion of sp2 carbons tosp3 hybridization during alkyne introduction. Thermogravimetric analysis indicated that the polymer-functionalized SWNTs consisted of 45% polymer, amounting to approximately one polymer chain for every200-700 carbons of the nanotubes, depending on polymer molecular weight. Transmission electronmicroscopy and atomic force microscopy were utilized to image polymer-functionalized SWNTs, showingrelatively uniform polymer coatings present on the surface of individual, debundled nanotubes.