Nondestructive formation of supramolecular nanohybrids of single-walled carbon nanotubes with flexible porphyrinic polypeptides
Nondestructive formation of supramolecular nanohybrids of single-walled carbon nanotubes with flexible porphyrinic polypeptides
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DOI：
10.1021/jp065615i
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发表时间：
2007-01-25
影响因子：
3.7
通讯作者：
Fukuzumi, Shunichi
中科院分区：
文献类型：
--
作者：
Saito, Kenji;Troiani, Vincent;Fukuzumi, Shunichi
单次等待碳纳米管(SWNT)的分离策略是开发纳米管作为有用的纳米级构建块的关键。其中，HIPCO单壁碳纳米管的直径选择分散是通过将非破坏性纳米管与含有16个卟啉单元的柔性卟啉多肽[P(H-2)P(16)]在298K的DMF中非共价络合来实现的，超分子的形成是通过在P(H-2)P(16)中包裹多肽骨架以及卟啉与纳米管之间的pi-pi相互作用来提取大直径纳米管(约1.3 nm)，如紫外可见-近红外光谱、拉曼光谱以及高分辨率电子显微镜所揭示的。超分子络合物的光激发提供了长寿命的电荷分离态。
Strategies for single-waited carbon nanotube (SWNT) separation are critical to developing nanotubes as useful nanoscale building blocks. Herein, diameter-selective dispersion of HiPco single-walled carbon nanotubes has been accomplished through noncovalent complexation of the nondestructive nanotubes with a flexible porphyrinic polypeptide bearing 16 porphyrin units [P(H2P)(16)] in DMF at 298 K. Supramolecular formation occurs through wrapping of peptidie backbone in P(H-2)P)(16) and pi-pi interaction between porphyrins and nanotubes to extract the large-diameter nanotubes (ca. 1.3 nm) as revealed by ultraviolet-visible-near-infrared and Raman spectroscopy as well as high-resolution transmission electron micropscopy. The photoexcitation of the supramolecular complex affords the long-lived charge-separated state.