UV‐light mediated decomposition of a polyester for enrichment and release of semiconducting carbon nanotubes,Journal of Polymer Science

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UV‐light mediated decomposition of a polyester for enrichment and release of semiconducting carbon nanotubes
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-06-23 , DOI: 10.1002/pol.20200132
William J. Bodnaryk ₁ , Kelvin Li ₁ , Alex Adronov ₁

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Purification of single‐walled carbon nanotubes using conjugated polymers to selectively disperse either semiconducting or metallic nanotubes is effective and has received significant attention. However, the interaction between the conjugated polymer and the nanotube surface is very strong, making it difficult to remove the adsorbed polymer. Here, we report a poly(carbazole‐co‐terephthalate) polymer that is not only selective for semiconducting carbon nanotubes but can also be largely removed from the nanotube surface via irradiation with UV light. Irradiation of the polymer‐nanotube dispersion causes degradation of ester linkages in the polymer backbone, effectively cutting the polymer into fragments that no longer bind strongly to the nanotube surface. Characterization of the electronic nature of the samples was carried out via the combination of absorption, Raman, and fluorescence spectroscopy. In addition, thermogravimetric analysis allowed determination of the amount of polymer left on the nanotube surface after irradiation and indicated that a large proportion of the polymer is removed. The reported methodology opens new possibilities for purification of semiconducting single‐walled carbon nanotubes and their isolation from the polymeric dispersant.

中文翻译：

紫外线介导的聚酯分解，以富集和释放半导体碳纳米管

使用共轭聚合物选择性分散半导体纳米管或金属纳米管的单壁碳纳米管的纯化是有效的，并受到了广泛的关注。然而，共轭聚合物与纳米管表面之间的相互作用非常强，使得难以除去吸附的聚合物。在这里，我们提出一个聚（咔唑合作对苯二酸酯）聚合物不仅对半导体碳纳米管具有选择性，而且还可以通过紫外线照射从碳纳米管表面大量去除。辐照聚合物纳米管分散体会导致聚合物主链中的酯键降解，从而有效地将聚合物切割成不再牢固结合至纳米管表面的碎片。样品的电子性质的表征是通过吸收，拉曼和荧光光谱法的组合进行的。另外，热重分析允许确定辐照后留在纳米管表面上的聚合物的量，并表明除去了大部分聚合物。

更新日期：2020-06-23

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