Abstract

Molecules of polycyclic hydrocarbons (PAHs) that contain between two and five rings undergo quenching processes in the presence of cetylpyridinium bromide (CPB), which can act as quencher and as surfactant. The CPB concentration and the nature of the PAHs notably influence the inhibition mechanisms of fluorescence. Dynamic quenching is predominant for all hydrocarbons in solutions in which CPB is found in the form of monomers. When the quencher forms premicellar aggregates, fluoranthene, benzo[a]pyrene, and benz[a]anthracene undergo dynamic quenching, while for the remaining PAHs the dynamic and static processes coexist. In micellar CPB solutions the static quenching mechanism is predominant. The correlations existing between the quenching constant in the premicellar zone and topological and geometrical descriptors of the PAHs show the different behavior of alternant and nonalternant hydrocarbons.

Interference filter tilting to detect a polycyclic aromatic hydrocarbon at the second harmonic of wavelength modulation frequency

Dmitri Lanevski, Koit Mauring, and Eric Tkaczyk
Appl. Opt. 56(11) 3155-3161 (2017)

Simultaneous one-dimensional visualization of OH, polycyclic aromatic hydrocarbons, and soot in a laminar diffusion flame

Francesco Cignoli, Sergio Benecchi, and Giorgio Zizak
Opt. Lett. 17(4) 229-231 (1992)

Quantifying PAHs in water by three-way fluorescence spectra and second-order calibration methods

Ruifang Yang, Nanjing Zhao, Xue Xiao, Gaofang Yin, Shaohui Yu, Jianguo Liu, and Wenqing Liu
Opt. Express 24(14) A1148-A1157 (2016)

Subpicogram laser-induced fluorescence detection of aromatic hydrocarbons in vapor-deposited aromatic crystals

Charles F. Pace and Jon R. Maple
J. Opt. Soc. Am. B 2(9) 1582-1588 (1985)

Detection of oxygen by fluorescence quenching

M. E. Cox and B. Dunn
Appl. Opt. 24(14) 2114-2120 (1985)