An effective route to diameter-controlled single-walled carbon nanotubes (SWCNTs) remains elusive. The use of organic templates to precisely control the diameter of the resulting nanotubes holds great promise in this regard but has hitherto had very limited practical success. A main obstacle is the limited availability of suitable organic templates. Here, we report the diameter-controlled bottom-up synthesis of SWCNTs with elaborately designed [2n]collarenes, hydrocarbon belts consisting of alternating phenylene and 1,4-cyclohexadiene rings, as rigid organic templates. A new approach has been developed to construct these collarenes, which are then used as templates in the bottom-up growth of SWCNTs. The resulting SWCNTs exhibit narrow diameter distributions, matching the diameters of the employed collarene templates. This work greatly propels the synthesis of diameter-controlled SWCNTs.

中文翻译：

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使用 [2n] Collarenes 作为刚性有机模板的直径控制合成碳纳米管


获得直径控制的单壁碳纳米管 （SWCNT） 的有效途径仍然难以捉摸。在这方面，使用有机模板来精确控制所得纳米管的直径具有很大的前景，但迄今为止的实际成功非常有限。一个主要障碍是合适的有机模板的可用性有限。在这里，我们报道了直径控制的自下而上合成 SWCNTs，其中精心设计的 [2n] collarenes，由交替的苯和 1,4-环己二烯环组成的烃带，作为刚性有机模板。已经开发了一种构建这些衣领烯的新方法，然后将其用作 SWCNT 自下而上生长的模板。所得 SWCNT 表现出窄直径分布，与所采用的 collarene 模板的直径相匹配。这项工作极大地推动了直径可控 SWCNT 的合成。