Polymer conformation-assisted wrapping of single-walled carbon nanotube: The impact of cis-vinylene linkage

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• 作者：Wenhui Yi ; Andrey Malkovskiy ; Yongqian Xu ; Xiao-Qian Wang ; Alexei P. Sokolov ; Marisabel Lebron-Colon ; Michael A. Meador ; Yi Pang
• 关键词：Carbon nanotube ; Conjugated polymer ; Fluorescence
• 刊名：Polymer
• 出版年：2010
• 出版时间：21 January 2010
• 年：2010
• 卷：51
• 期：2
• 页码：475-481
• 全文大小：1064 K

文摘

A soluble π-conjugated polymer cis-PmPV is found to be twice as effective as its trans-PmPV isomer in dispersing SWNTs into organic solvents. The improved efficiency is related to the specific conformation of cis-vinylene-enriched PmPV, which facilitates a planar π–π interaction with SWNT surface and leads to improved nanotube dispersion. ¹H NMR spectra indicate that the cis-CHCH bonds are partially converted to the trans-CHCH, thereby providing necessary conformational cavity for SWNT wrapping. Irradiation triggers a precipitation from SWNT dispersion, providing a purified SWNT/conjugated polymer composite.