Ionic liquids plus microwave irradiation: a general methodology for the retro-functionalization of single-walled carbon nanotubes†,Nanoscale

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Ionic liquids plus microwave irradiation: a general methodology for the retro-functionalization of single-walled carbon nanotubes†
Nanoscale ( IF 5.8 ) Pub Date : 2018-07-20 00:00:00 , DOI: 10.1039/c8nr04590a
Myriam Barrejón _{1,

2,

3,

4,

5} , Zois Syrgiannis _{1,

2,

3,

4,

5} , Maurizio Prato _{1,

2,

3,

4,

5}

Affiliation

One of the most important objectives nowadays in the field of chemical modification of carbon nanotubes (CNTs) is to control the degree of functionalization, since excessive modification can disrupt the π-conjugated system and adversely affect their useful properties. Covalent functionalization is one of the most common methods for the modification of single-walled carbon nanotubes (SWCNTs). However, only a few examples have appeared in the last few years regarding the control of the functionalization degree and the reversibility of the reaction. We present here an approach for the retro-functionalization of SWCNTs which could be applied to different types of covalent functionalizations, allowing the restoration of the π-conjugated structure. The process is performed through the combination of ionic liquids plus microwave irradiation and it is applicable to the retro-arylation and retro-cycloaddition reactions on SWCNTs. The successful retro-functionalization is monitored by Raman spectroscopy, thermogravimetric analysis and UV-Vis-NIR spectroscopy.

中文翻译：

离子液体加微波辐射：单壁碳纳米管逆功能化的通用方法†

如今，碳纳米管（CNT）的化学改性领域中最重要的目标之一是控制功能化的程度，因为过度的改性会破坏π共轭体系并对其有用性能产生不利影响。共价官能化是修饰单壁碳纳米管（SWCNT）的最常用方法之一。然而，在最近几年中，关于官能化度的控制和反应的可逆性仅出现了几个例子。我们在这里介绍了SWCNTs的逆官能化方法，该方法可以应用于不同类型的共价官能化，从而可以恢复π共轭结构。该过程是通过结合离子液体和微波辐射来进行的，适用于SWCNT的逆芳基化和逆环加成反应。成功的逆功能化通过拉曼光谱，热重分析和UV-Vis-NIR光谱进行监控。

更新日期：2018-07-20

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