Photoluminescence Spectroscopy of Anthra-thiophenes and Benzonaphtho-thiophenes in Shpol'skii Matrixes

Published

October 16, 2018

Author(s)

Maha Al-Tameemi, Sadia Arif, Andres Campiglia, Walter Brent Wilson, Stephen Wise

Abstract

The dispersion of harmful oil components into the ocean waters could pose long-term risks to flora and fauna. Due to the complexity of oil-contaminated sites, the unambiguous identification and quantitation of environmental pollutants often requires the sequence of high-performance liquid chromatography and gas chromatography-mass spectrometry. A classic example is the analysis of polycyclic aromatic hydrocarbons. This article tackles a different aspect of environmental analysis as it focuses on the Shpol'skii spectroscopy of polycyclic aromatic sulfur heterocycles, specifically those belonging to the subgroups often known as anthra-thiophenes and benzonaphtho- thiophenes. Photoluminescence measurements were made with a commercial spectrofluorimeter equipped with a continuous wave excitation source for steady state measurements and a pulsed excitation source for time-resolved measurements in the phosphorescence time domain. To the extent of our literature search, this is the first report on the 4.2 K fluorescence and phosphorescence spectra of anthra-thiophenes and benzonaphtho-thiophenes, and the 77 K and 4.2 K phosphorescence lifetimes of benzonaphtho-thiophenes. 77 K and 4.2 K analytical figures of merit revealed the possibility to detect the studied compounds at the parts-per-billion (ng mL-1) concentration levels. The spectral and lifetime data gathered in this article provides the required information to choose an appropriate photoluminescence technique for the analysis of four-ring polycyclic aromatic sulfur heterocycles in complex environmental extracts.

Citation

Talanta

Volume

194

Pub Type

Journals

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DOI Link

Keywords

Photoluminescence, Shpol’skii spectroscopy, Polycyclic aromatic sulfur heterocycles, Anthra- thiophenes, Benzonaphtho-thiophenes, Time-resolved phosphorimetry

Citation

Al-Tameemi, M. , Arif, S. , Campiglia, A. , Wilson, W. and Wise, S. (2018), Photoluminescence Spectroscopy of Anthra-thiophenes and Benzonaphtho-thiophenes in Shpol'skii Matrixes, Talanta, [online], https://doi.org/10.1016/j.talanta.2018.10.044 (Accessed December 26, 2024)