Polymers Comprising Concave and Chiral Subunits for the Selective Dispersion of Single Walled Carbon Nanotubes (SWCNT)

用于单壁碳纳米管（SWCNT）选择性分散的包含凹面和手性亚基的聚合物

• 批准号: 245167619
• 负责人: Professor Dr. Manfred Kappes
• 金额: --
• 依托单位: Department of Chemistry
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/245167619?language=en
• 关键词: Polymers; Comprising; Concave; Chiral; Subunits

Single wall carbon nanotubes are promising materials for future devices due to their outstanding physical properties. In particular their electronic and optical features make them promising functional units in numerous applications. While the correlation between their structure (n,m indices) and physical properties is well understood, their integration into devices and materials suffers from both the poor availability of pure samples and the limited processability of these substances. Within this proposal we strive to develop polymeric structures able to selectively disperse SWCNTs with well defined physical features like electronic properties, diameter, n,m-indices and even chirality. For that purpose concave building blocks with favorable Pi-stacking interactions with bent SWCNT surfaces shall be developed and integrated in various (co)-polymers. These building blocks will be synthesized as racemates which will be separated into pure enantiomers (by separating the diastereomers obtained from both enantiomers). The approach will thus make (co)-polymers of enantiomerically pure building blocks available. These (co)-polymers will be used to disperse HiPco-SWCNTs and the composition of the dispersion (as well as the polymer SWCNT interaction) will be analyzed by optical methods like UV-vis-nIR absorption , nIR photoluminescence-, and Raman spectroscopy.We also aim at developing a process enabling the reversible coating of SWCNTs by polymers. While the dispersing coating provides perfectly processable tubes, the residual insulating coating effects the interaction of the tube with the substrate upon integration. By profiting from the reversibility of Diels-Alder reactions we design coating polymers which can be thermally decomposed into small building blocks. Thereby we hope to provide coatings providing processability which can be removed after integration of the tube in UHV applications. We will correspondingly investigate the polymers thermal decomposition on the SWCNTs in situ, using both desorption mass spectrometry, Raman microscopy and a variety of surface analytical methods to probe the resulting materials. This will also provide feedback for the optimization of the polymer structure for the purpose of obtaining UHV clean chiral vector selected SWCNT materials for further studies.

单壁碳纳米管因其优异的物理性能而成为未来器件中很有前途的材料。特别是它们的电子和光学特性使它们在许多应用中具有很好的功能单元。虽然它们的结构（n，m指数）与物理性质之间的相关性被很好地理解，但它们在器件和材料中的整合受到纯样品可用性差和这些物质的有限可加工性的影响。在本提案中，我们努力开发能够选择性分散SWCNTs的聚合物结构，这些结构具有明确的物理特征，如电子性质、直径、n、m指数甚至手性。为此，应开发与弯曲的swcnts表面具有良好pi堆叠相互作用的凹结构块，并将其集成到各种（co）聚合物中。这些构建块将被合成为外消旋体，并将其分离成纯对映体（通过分离从两个对映体中得到的非对映体）。因此，该方法将使(co)-对映体纯构建块的聚合物成为可能。这些(co)-聚合物将用于分散HiPco-SWCNTs，分散体的组成（以及聚合物swcnts相互作用）将通过紫外-可见-近红外吸收、近红外光致发光和拉曼光谱等光学方法进行分析。我们还致力于开发一种能够通过聚合物对SWCNTs进行可逆涂层的工艺。虽然分散涂层提供了完全可加工的管，但残余的绝缘涂层在集成时影响管与基板的相互作用。利用Diels-Alder反应的可逆性，我们设计了可以热分解成小构件的涂层聚合物。因此，我们希望提供具有可加工性的涂层，这些涂层可以在特高压应用中集成管后去除。我们将相应地研究聚合物在SWCNTs上的原位热分解，使用解吸质谱法、拉曼显微镜和各种表面分析方法来探测所得材料。这也将为聚合物结构的优化提供反馈，从而获得特高压清洁手性载体选择的swcnts材料，供进一步研究。

项目成果

Formation of Sublimable Nanographene Oxides by Reacting Coronene Films with Atomic Oxygen

• DOI: 10.1021/acs.jpcc.8b01655
• 发表时间: 2018-09
• 期刊: The Journal of Physical Chemistry C
• 作者: J. Weippert;S. Ulas;Dmitry V. Strelnikov;A. Böttcher;M. Kappes

A TPD-based determination of the graphite interlayer cohesion energy.

• DOI: 10.1063/1.5052728
• 发表时间: 2018-11
• 期刊: The Journal of chemical physics
• 作者: J. Weippert;Jakob Hauns;J. Bachmann;A. Böttcher;Xuelin Yao;Bo Yang;A. Narita;K. Müllen;M. Kappes