用连续波量子级联激光光谱仪研究N2O4在7.8 μm处的有效谱线强度。

IF 4.6 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-09-25 DOI:10.1016/j.saa.2025.126977

Qizhi Zhu , Shuaikang Yin , Xin Shi , Yutao Fang , Zhijun Cheng , Yang Hong , Benli Yu , Xiaojuan Cui

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引用次数: 0

摘要

利用连续波量子级联激光光谱仪测量了四氧化二氮（N2O4）在1279.8 ~ 1282.5 cm-1范围内的谱线位置和有效谱线强度。利用MATLAB开发的数据处理程序，将光谱数据与Voigt、Rautian和galry线剖面拟合。对不同谱线剖面的性能进行了评估，Rautian剖面与更快的计算速度最匹配，是实时和长期监测的理想选择。测线位置和强度的最大不确定度分别为1.95*10-3 cm-1和6.47%。谱线位置的不确定性主要来自参考谱线，而谱线强度的不确定性主要来自N2O4浓度的计算和拟合误差。这些结果有助于气体泄漏监测和N2O4的光谱分析，以及研究氮氧化物反应过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Investigation of effective line strengths of N2O4 at 7.8 μm using a continuous-wave quantum cascade laser spectrometer

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Investigation of effective line strengths of N2O4 at 7.8 μm using a continuous-wave quantum cascade laser spectrometer

The spectral line positions and effective line strengths of dinitrogen tetroxide (N₂O₄) in the range of 1279.8–1282.5 cm⁻¹ were measured using a continuous-wave quantum cascade laser spectrometer. A data processing program developed in MATLAB was used to fit the spectral data with Voigt, Rautian, and Galatry line profiles. The performance of different spectral line profiles was evaluated, and the Rautian profile achieved the best fit with faster calculations, making it ideal for real-time and long-term monitoring. The maximum uncertainties in the measured line positions and intensities are 1.95*10⁻³ cm⁻¹ and 6.47 %, respectively. The line position uncertainty is mainly from reference spectral lines, while intensity uncertainty is due to N₂O₄ concentration calculations and fitting errors. These results aid in gas leak monitoring and spectral analysis of N₂O₄, as well as in studying nitrogen oxide reaction processes.

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.