Photochemical reaction of nitro-polycyclic aromatic hydrocarbons: effect by solvent and structure |
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Authors: | Gernerique Stewart Keonia Smith Ashley Chornes Tracy Harris Tiffany Honeysucker Hongtao Yu |
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Institution: | (1) Department of Chemistry, Jackson State University, Jackson, MS 39217, USA;(2) Present address: Department of Chemistry, Grambling State University, Grambling, LA 71245, USA; |
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Abstract: | Photochemical degradation of 1-nitropyrene, 2-nitrofluorene, 2,7-dinitrofluorene, 6-nitrochrysene, 3-nitrofluoranthene, 5-nitroacenaphthene,
and 9-nitroanthracene was examined in CHCl3, CH2Cl2, DMF, DMF/H2O (80/20), CH3CN, or CH3CN/H2O (80/20). The degradation mostly follows the first order kinetics; but a few follow second order kinetics or undergo self-catalysis.
The photodegradation rates follow the order: CHCl3 > CH2Cl2 > DMF > DMF/H2O > CH3CN > CH3CN/H2O. DMF is an exceptional solvent because three of the seven compounds undergo self-catalytic reaction. 9-Nitroanthracene,
which has a perpendicular nitro group, is the fastest, while the more compact 1-nitropyrene and 3-nitrofluoranthene are the
slowest degrading compounds. |
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