Sublimable Surfactant for Carbon Nanotube Dispersion: Effect of the Length of 10-n-Alkyl Side Chains of Flavin on Sublimation

IF 3.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Bulletin of the Chemical Society of Japan Pub Date : 2023-10-14 DOI:10.1246/bcsj.20230204

Yuichi Kato, Takushi Sugino

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Abstract

We investigated the sublimation properties of 10-n-alkyl side chains of flavins (n = 4–9, and 12) to address the issue of surfactant residue in single-walled carbon nanotubes (SWNTs). Thermogravimetric analysis under vacuum indicated that the 10-octyl-alkyl side chain of flavin sublimated at a lower temperature than the other flavins, with a saturation vapor pressure of 0.1 Pa at 200 °C. This allowed sublimation without the competing thermal reaction. Therefore, the 10-octyl-alkyl side chain of flavin is a surfactant that can separate and disperse semiconducting SWNTs for the effective utilization of their electrical properties. Moreover, it can be subsequently removed via sublimation. The flavin containing an octyl-alkyl chain (10-octyl-7,8-dimethyl-10H-benzo[g]-pteridine-2,4-dione) sublimated with a saturation vapor pressure of 0.1 Pa at 200 °C. This allowed sublimation without the competing thermal reaction. Moreover, the flavin with octyl-alkyl chain is a surfactant that can separate and disperse semiconducting SWNTs for the effective utilization of their electrical properties.

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用于碳纳米管分散的可升华表面活性剂:黄素10-n-烷基侧链长度对升华的影响

为了解决单壁碳纳米管(SWNTs)中表面活性剂残留的问题，研究了黄素10-n-烷基侧链(n = 4-9和12)的升华特性。真空热重分析表明，黄素的10-辛烷基侧链升华温度低于其他黄素，200℃时饱和蒸汽压为0.1 Pa。这使得升华过程没有热反应的竞争。因此，黄素的10-辛烷基侧链是一种表面活性剂，可以分离和分散半导体单壁碳纳米管，从而有效地利用其电学性质。此外，它可以随后通过升华去除。含有辛基-烷基链的黄素(10-辛基-7,8-二甲基- 10h -苯并[g]-蝶啶-2,4-二酮)在200℃下以0.1 Pa的饱和蒸汽压升华。这使得升华过程没有热反应的竞争。此外，具有辛烷基链的黄素是一种表面活性剂，可以分离和分散半导体单壁碳纳米管，从而有效地利用其电性能。

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来源期刊

Bulletin of the Chemical Society of Japan 化学-化学综合

CiteScore

6.40

自引率

5.00%

发文量

194

审稿时长

3-8 weeks

期刊介绍： The Bulletin of the Chemical Society of Japan (BCSJ) is devoted to the publication of scientific research papers in the fields of Theoretical and Physical Chemistry, Analytical and Inorganic Chemistry, Organic and Biological Chemistry, and Applied and Materials Chemistry. BCSJ appears as a monthly journal online and in advance with three kinds of papers (Accounts, Articles, and Short Articles) describing original research. The purpose of BCSJ is to select and publish the most important papers with the broadest significance to the chemistry community in general. The Chemical Society of Japan hopes all visitors will notice the usefulness of our journal and the abundance of topics, and welcomes more submissions from scientists all over the world.