Vapor detection of polyaromatic compounds using laser-induced fluorescence

Zenhuan Chi; Brian M. Cullum; Joel Mobley; Gordon H. Miller; Tuan Vo-Dinh

doi:10.1117/12.417374

14 February 2001 Vapor detection of polyaromatic compounds using laser-induced fluorescence

Zenhuan Chi, Brian M. Cullum, Joel Mobley, Gordon H. Miller, Tuan Vo-Dinh

Proceedings Volume 4199, Water, Ground, and Air Pollution Monitoring and Remediation; (2001) https://doi.org/10.1117/12.417374
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

12 In this work, we present the fluorescence spectra of anthracene and pyrene vapors at different elevated temperatures (from 150 to 650 degree(s)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.

Citation Download Citation

Zenhuan Chi, Brian M. Cullum, Joel Mobley, Gordon H. Miller, and Tuan Vo-Dinh "Vapor detection of polyaromatic compounds using laser-induced fluorescence", Proc. SPIE 4199, Water, Ground, and Air Pollution Monitoring and Remediation, (14 February 2001); https://doi.org/10.1117/12.417374

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