拉曼中频模式下单壁碳纳米管功能化的结构分辨监测

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2023-08-30 DOI:10.1021/acs.jpclett.3c02100

Nima Soltani, Yu Zheng, Sergei M. Bachilo and R. Bruce Weisman*,

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引用次数: 0

摘要

单壁碳纳米管(SWCNTs)可以通过共价修饰来改变其光谱和光物理性质。我们在此报告了一种新的方法来监测不同纳米管结构的这种功能化反应的程度。通过拉曼光谱分析，发现sp3缺陷在350 ~ 650 cm-1范围内引起的结构特异性中频模式(IFM)特征强度。发现IFM频率与纳米管直径和拉曼激发波长有关。IFM特征的增长伴随着RBM强度的降低，因此IFM与RBM强度之比可以提供一个敏感的、结构特异性的纳米管功能化测量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Structure-Resolved Monitoring of Single-Wall Carbon Nanotube Functionalization from Raman Intermediate Frequency Modes

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Structure-Resolved Monitoring of Single-Wall Carbon Nanotube Functionalization from Raman Intermediate Frequency Modes

Single-wall carbon nanotubes (SWCNTs) can be covalently modified to generate useful changes in their spectroscopic and photophysical properties. We report here a new method to monitor the extent of such functionalization reactions for different nanotube structures. Raman spectra are analyzed to find the intensities of structure-specific intermediate frequency mode (IFM) features in the range of ca. 350 to 650 cm-1, which are induced by introduction of sp3 defects. The IFM frequencies are found to depend on both the nanotube diameter and Raman excitation wavelength. The growth of IFM features is accompanied by a decrease in RBM intensities, so the IFM to RBM intensity ratio can provide a sensitive, structure-specific measure of nanotube functionalization.

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.