| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Differentiation of Positional Isomers of Propyl Alcohols Using Filament-Induced Fluorescence |
| Xiang-Ye Wei, Zhi-Wei Tu, Chang Liu, He-Long Li, Huai-Liang Xu** |
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012
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| Cite this article: |
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Xiang-Ye Wei, Zhi-Wei Tu, Chang Liu et al 2016 Chin. Phys. Lett. 33 054201 |
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Abstract We experimentally demonstrate the recognition of positional isomers of propyl alcohol vapor through nonlinear fluorescence induced by high-intensity femtosecond laser filaments in air. By measuring characteristic fluorescence of n-propyl and isopropyl alcohol vapors produced by femtosecond filament excitation, it is found that they show identical spectra, that is, those from molecular bands of CH, C$_{2}$, NH, OH and CN, while the relative intensities are different. By comparing the ratios of the CH and C$_{2}$ signals, the two propyl alcohol isomers are differentiated. The different signal intensities are ascribed to different ionization potentials of the two isomer molecules, leading to different production efficiencies of fluorescing fragments.
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Received: 23 February 2016
Published: 31 May 2016
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| PACS: |
42.62.Fi
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(Laser spectroscopy)
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33.20.Xx
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(Spectra induced by strong-field or attosecond laser irradiation)
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