Laser-induced fluorescence studies of polycyclic aromatic hydrocarbons (PAH) vapors at high temperatures
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Author/Creator ORCID
Date
2001-06-01
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Department
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Citation of Original Publication
Chi, Zhenhuan, Brian M Cullum, David L Stokes, Joel Mobley, Gordon H Miller, Mohammad R Hajaligol, and Tuan Vo-Dinh. “Laser-Induced Fluorescence Studies of Polycyclic Aromatic Hydrocarbons (PAH) Vapors at High Temperatures.” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 57, no. 7 (June 1, 2001): 1377–84. https://doi.org/10.1016/S1386-1425(00)00479-0.
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Public Domain
Abstract
In this work, we present the fluorescence spectra of anthracene and pyrene vapors at different elevated temperatures (from 150 to 650°C) excited with the 337 nm line of a nitrogen laser. We describe the high temperature effects on the resulting spectral properties including spectral intensity, spectral bandwidth and spectral shift. We found that the PAH fluorescence spectral bandwidths become very broad as the temperature increases. The broadening is mainly due to thermal vibrational sequence congestion. We also have found that the fluorescence intensity of pyrene vapor increases with increasing temperature, which results from the increase of the pyrene vapor absorption cross section at 337 nm.