Synthetic control over the binding configuration of luminescent sp(3)-defects in single-walled carbon nanotubes.
Synthetic control over the binding configuration of luminescent sp(3)-defects in single-walled carbon nanotubes.
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DOI：
10.1038/s41467-021-22307-9
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发表时间：
2021-04-09
影响因子：
16.6
通讯作者：
Zaumseil J
中科院分区：
文献类型：
--
作者：
Settele S;Berger FJ;Lindenthal S;Zhao S;El Yumin AA;Zorn NF;Asyuda A;Zharnikov M;Högele A;Zaumseil J
具有发光sp3缺陷的单壁碳纳米管的受控功能化创造了将它们用作近红外量子光源的潜力。为此，控制其频谱多样性至关重要。发射波长由缺陷的结合构型而不是所连接基团的分子结构决定。然而，目前的功能化方法产生多种结合构型，因此产生多种发射波长。我们介绍了一个简单的反应协议，在聚合物分选（6，5）纳米管，这是更多的红移，并表现出更长的光致发光寿命比通常获得的绑定配置中只有一种类型的发光缺陷。我们展示了在室温下的单光子发射，并将这种功能化扩展到其他聚合物包裹的纳米管，进一步在近红外发射。由于与各种苯胺衍生物反应的选择性取决于有机碱的存在，我们建议亲核加成反应的机制。具有发光sp3缺陷的单壁碳纳米管的共价官能化通常产生各种结合构型和发射波长。作者提出了一种碱介导的亲核官能化方法，以选择性地实现E11* 和E11*-或纯E11*-缺陷发射的构型。
The controlled functionalization of single-walled carbon nanotubes with luminescent sp3-defects has created the potential to employ them as quantum-light sources in the near-infrared. For that, it is crucial to control their spectral diversity. The emission wavelength is determined by the binding configuration of the defects rather than the molecular structure of the attached groups. However, current functionalization methods produce a variety of binding configurations and thus emission wavelengths. We introduce a simple reaction protocol for the creation of only one type of luminescent defect in polymer-sorted (6,5) nanotubes, which is more red-shifted and exhibits longer photoluminescence lifetimes than the commonly obtained binding configurations. We demonstrate single-photon emission at room temperature and expand this functionalization to other polymer-wrapped nanotubes with emission further in the near-infrared. As the selectivity of the reaction with various aniline derivatives depends on the presence of an organic base we propose nucleophilic addition as the reaction mechanism. Covalent functionalization of single-walled carbon nanotubes with luminescent sp3-defects generally produces a variety of binding configurations and emission wavelengths. The authors propose a base-mediated nucleophilic functionalization approach to selectively achieve configurations for E11* and E11*- or purely E11*- defect emission.
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影响因子：
3.6
作者：
Li, Fei;Xuan, Jun;Tian, Yupeng
通讯作者：
Tian, Yupeng
影响因子：
23.5
作者：
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影响因子：
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作者：
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Zaumseil J
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
Tretiak, Sergei