Interaction of Luminescent Defects in Carbon Nanotubes with Covalently Attached Stable Organic Radicals.
Interaction of Luminescent Defects in Carbon Nanotubes with Covalently Attached Stable Organic Radicals.
复制标题
碳纳米管中发光缺陷与钴基稳定有机自由基的相互作用。
DOI：
10.1021/acsnano.0c10341
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发表时间：
2021-03-23
期刊：
影响因子：
17.1
通讯作者：
Zaumseil J
中科院分区：
文献类型：
--
作者：
Berger FJ;de Sousa JA;Zhao S;Zorn NF;El Yumin AA;Quintana García A;Settele S;Högele A;Crivillers N;Zaumseil J
具有发光sp3缺陷的单壁碳纳米管（SWCNTs）的功能化极大地提高了其在量子光源和生物成像等应用中的性能。在这里，我们报告了纯化的半导体单壁碳纳米管与稳定的有机基团（全氯三苯基甲基，PTM）进行净自旋的共价官能化。该模型系统使我们能够使用近红外光致发光所产生的缺陷局部激子作为一个高度敏感的探针PTM自由基和单壁碳纳米管之间的短程相互作用。我们的研究结果指向增加的三重态激子人口由于自由基增强的系间交叉，这可以提供访问难以捉摸的三重态歧管单壁碳纳米管。此外，这种简单的自旋标记缺陷的合成路线可以使磁共振研究与功能化单壁碳纳米管的体内荧光成像互补，并促进具有磁性可切换电荷传输的自旋电子器件的可扩展制造。
The functionalization of single-walled carbon nanotubes (SWCNTs) with luminescent sp3 defects has greatly improved their performance in applications such as quantum light sources and bioimaging. Here, we report the covalent functionalization of purified semiconducting SWCNTs with stable organic radicals (perchlorotriphenylmethyl, PTM) carrying a net spin. This model system allows us to use the near-infrared photoluminescence arising from the defect-localized exciton as a highly sensitive probe for the short-range interaction between the PTM radical and the SWCNT. Our results point toward an increased triplet exciton population due to radical-enhanced intersystem crossing, which could provide access to the elusive triplet manifold in SWCNTs. Furthermore, this simple synthetic route to spin-labeled defects could enable magnetic resonance studies complementary to in vivo fluorescence imaging with functionalized SWCNTs and facilitate the scalable fabrication of spintronic devices with magnetically switchable charge transport.
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