scholarly journals Luminescent Molecular Switches Based on Dicationic P-Doped Polycyclic Aromatic Hydrocarbons

2020 ◽  
Author(s):  
Thomas Delouche ◽  
Antoine Vacher ◽  
Thierry Roisnel ◽  
Marie Cordier ◽  
Jean-Frederic Audibert ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Radical Cations ◽  
Molecular Switches ◽  
Fine Tuning ◽  
Efficient Synthesis ◽  
Paramagnetic Resonance ◽  
Polycyclic Aromatic ◽  
Electron Paramagnetic

We report the efficient synthesis of electron-acceptors based on cationic P-doped PAHs (Polycyclic Aromatic Hydrocarbons). Both endo- and exo-skeletal modifications of the p-core allow fine-tuning their optical and redox properties. Combined experimental (spectrolectrochemical and Electron Paramagnetic Resonance) and theoretical studies provide an in-depth characterization of the reduced species and specifically of the stable radical cations formed. Finally, electrochemical modulation of fluorescence highlights the potential of these intrinsically switchable electroactive fluorophores.

scholarly journals Luminescent Molecular Switches Based on Dicationic P-Doped Polycyclic Aromatic Hydrocarbons

2020 ◽  
Author(s):  
Thomas Delouche ◽  
Antoine Vacher ◽  
Thierry Roisnel ◽  
Marie Cordier ◽  
Jean-Frederic Audibert ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Radical Cations ◽  
Molecular Switches ◽  
Fine Tuning ◽  
Efficient Synthesis ◽  
Paramagnetic Resonance ◽  
Polycyclic Aromatic ◽  
Electron Paramagnetic

We report the efficient synthesis of electron-acceptors based on cationic P-doped PAHs (Polycyclic Aromatic Hydrocarbons). Both endo- and exo-skeletal modifications of the p-core allow fine-tuning their optical and redox properties. Combined experimental (spectrolectrochemical and Electron Paramagnetic Resonance) and theoretical studies provide an in-depth characterization of the reduced species and specifically of the stable radical cations formed. Finally, electrochemical modulation of fluorescence highlights the potential of these intrinsically switchable electroactive fluorophores.

scholarly journals Luminescent molecular switches based on dicationic P-doped polycyclic aromatic hydrocarbons

2020 ◽  
Vol 1 (9) ◽  
pp. 3369-3377
Author(s):  
Thomas Delouche ◽  
Antoine Vacher ◽  
Thierry Roisnel ◽  
Marie Cordier ◽  
Jean-Frederic Audibert ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Molecular Switches ◽  
Efficient Synthesis ◽  
Polycyclic Aromatic

We report the efficient synthesis cationic P-doped Polycyclic Aromatic Hydrocarbons showing electrofluorochromic properties.

Radical cation formation during the adsorption of polycyclic aromatic hydrocarbons on platinum oxide

1973 ◽  
Vol 26 (1) ◽  
pp. 221 ◽  
Author(s):  
JL Garnett ◽  
KJ Nicol ◽  
A Rainis
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Radical Cation ◽  
Aromatic Hydrocarbons ◽  
Hyperfine Splitting ◽  
Radical Cations ◽  
Platinum Oxide ◽  
Adsorbed Species ◽  
Experimental Conditions ◽  
Polycyclic Aromatic

Experimental conditions are reported for resolving the hyperfine splitting of e.p.r. spectra obtained from the interaction of polycyclic aromatic hydrocarbons with platinum oxide. By contrast with earlier interpretations where only a singlet was obtained even with perylene, the present results indicate that the adsorbed species are radical cations.

scholarly journals Characterization of Polycyclic Aromatic Hydrocarbons and Bioaugmentation Potential of Locally Isolated Beneficial Microorganisms Consortium for Treatment of Tar-Balls

2021 ◽  
Vol 19 (3) ◽  
pp. 246-254
Author(s):  
Nur Zaida Zahari ◽  
◽  
Erma Hani Baharudzaman ◽  
Piakong Mohd Tuah ◽  
Fera Nony Cleophas ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Microbial Population ◽  
Oil Spills ◽  
Beneficial Microorganisms ◽  
Tar Balls ◽  
Polycyclic Aromatic ◽  
Biodegradation Study ◽  
Bioreactor System

Oil spills are one of the environmental pollutions that commonly occur along coastal areas. Tar-balls are one of the products that come from the oil spill pollution. In this study, tar-ball pollution was monitored at 10 points along the coastline of Marintaman Beach in Sipitang, Sabah, Malaysia. This research determined the physical characteristics, composition, and concentration of Polycyclic Aromatic Hydrocarbons (PAHs) in tar-balls. The total number of tar-balls collected was 227 (n=227). The tar-balls were observed in various shapes and the sizes were recorded in the range of 0.1 cm to 6.9 cm. The composition and concentration of Polycyclic Aromatic Hydrocarbons (PAHs) in the outer and inner layer of tar-balls were determined. The results showed that the main Polycyclic Aromatic Hydrocarbons (PAHs) compounds were found in inner layers of the tar-balls with benzo (g,h,i) perylene (72.26 mg/kg), flourene (59.87 mg/kg), dibenzo (a,h) anthracene (44.48 mg/kg), indeno (1,2,3-c,d) pyrene (78.18 mg/kg), and benzo (e) fluoranthene (45.70 mg/kg), respectively. Further research was done with the bioaugmentation study of locally isolated beneficial microorganisms (LIBeM) consortium for treatment of tar-balls in an Aerated Static Pile (ASP) bioreactor system. The results showed that, after 84 days of treatment, this consortium, consisting of C. tropicalis-RETL-Cr1, C. violaceum-MAB-Cr1, and P. aeruginosa-BAS-Cr1, was able to degrade total petroleum hydrocarbon (TPH) by 84% as compared to natural attenuation (19%). The microbial population of this consortium during the biodegradation study is also discussed in this paper.

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