Photochemical degradation of 1-nitropyrene, 2-nitrofluorene, 2,7-dinitrofluorene, 6-nitrochrysene, 3-nitrofluoranthene, 5-nitroacenaphthene, and 9-nitroanthracene were examined in CHCl(3), CH(2)Cl(2), DMF, DMF/H(2)O (80/20), CH(3)CN, or CH(3)CN/H(2)O (80/20). The degradation follows mostly the 1(st) order kinetics; but a few follow 2(nd) order kinetics or undergo self-catalysis. The photodegradation rates follow the order: CHCl(3) > CH(2)Cl(2) > DMF > DMF/H(2)O > CH(3)CN > CH(3)CN/H(2)O. DMF is an exceptional solvent because 3 of the 7 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.

中文翻译：

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硝基多环芳烃的光化学反应：溶剂和结构的影响。

1-硝基芘、2-硝基芴、2,7-二硝基芴、6-硝基芴、3-硝基荧蒽、5-硝基苊和 9-硝基蒽的光化学降解在 CHCl(3)、CH(2)Cl(2)、 DMF、DMF/H(2)O (80/20)、CH(3)CN 或 CH(3)CN/H(2)O (80/20)。降解主要遵循 1(st) 级动力学；但少数遵循 2(nd) 级动力学或经历自催化。光降解速率遵循以下顺序：CHCl(3) > CH(2)Cl(2) > DMF > DMF/H(2)O > CH(3)CN > CH(3)CN/H(2)O。DMF 是一种特殊的溶剂，因为 7 种化合物中有 3 种会发生自催化反应。具有垂直硝基的 9-硝基蒽是最快的，而更紧凑的 1-硝基芘和 3-硝基荧蒽是降解最慢的化合物。