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Differentiation of positional isomers of propyl alcohols using filament-induced fluorescence
WEI Xiangye,TU Zhiwei,LIU Chang,LI Helong,XU Huailiang * #
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Chagnchun, 130012
*Correspondence author
#Submitted by
Subject:
Funding: NSFC （No.No.61427816 and 61235003), Research Fund for the Doctoral Program of Higher Education of China）
Opened online: 3 March 2016
Accepted by: none
Citation: WEI Xiangye,TU Zhiwei,LIU Chang.Differentiation of positional isomers of propyl alcohols using filament-induced fluorescence[OL]. [ 3 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4678905
 
 
We experimentally demonstrate the recognition of positional isomers of propyl alcohol vapor through nonlinear fluorescence induced by the 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, namely those from molecular bands CH, C2 and CN, but the relative intensities are different, which can be used to differentiate the two propyl alcohol isomers. The different signal intensities were ascribed to different ionization potential of the isomer molecules, leading to different efficiency of fluorescing fragments.
Keywords:femtosecond laser filament; laser-induced fluorescence; positional isomers
 
 
 

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