Spectrochemical investigations in molecularly organized solvent media: Evaluation of nitromethane as a selective fluorescence quenching agent for alternant PAHs dissolved in micellar solvent media

Applications and New Developments in Fluorescence Spectroscopic Techniques for the Analysis of Polycyclic Aromatic Hydrocarbons

“…Nitromethane as a selective quencher for alternant vs. nonalternant PAHs has been extensively studied in the past for a number of PAHs. [60][61][62][63][64][65] Among the different PAHs studied, however, there are a few exceptions, the so-called nitromethane selective quenching rule. Pandey et al [60] have studied that nitromethane quenching selectivity is in only the anionic micellar solutions like sodium dodecyl sulphate (SDS).…”

Selective Fluorescence Quenching of Alternant vs. Non-Alternant Polycyclic Aromatic Hydrocarbons by Carbon Tetrachloride

“…32 The K SV values found for the CCl 4 quencher show higher values for perylene, pyrene, benzo[a]pyrene, and chrysene than for benzo[ghi]perylene and triphenylene. Fairly extensive quenching studies 12,13,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] have been carried out on alternate and non-alternate PAH uorescence by various electron donor and electron acceptor quenchers. Breymann et al 46 have found that rate constants of uorescence quenching by electron acceptors (nitrobenzene) are greater for alternate hydrocarbons than for nonalternate ones with the same E 0 -0.…”

“…Selective uorescence quenching of PAHs with nitromethane as the quencher has been extensively studied. 12,13,[17][18][19][20][21][22][23][24][25] But there are some border line cases for the 'nitromethane selective quenching rule'. Zander and co-workers reported that 1,2,4-trimethoxybenzene, an electron donor, selectively deactivated the uorescence of non-alternant PAHs.…”

Room temperature phosphorescence optosensing of benzo[a]pyrene in water using halogenated molecularly imprinted polymers

“…To enhance the selectivity of the luminescent detection for PAHs, discrimination between different compounds by selective fluorescence quenching or using time-resolved spectroscopy have been assayed. [14][15][16][17][18] Unfortunately, such methods require very often sophisticated instrumentation or complex data treatment.…”