By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Aromatic Polycyclic Hydrocarbons. According to news reporting originating in Bologna, Italy, by NewsRx journalists, research stated, "We report the aerobic photoactivation of N-hydroxyphthlimide (NHPI) to the phthalimido-N-oxyl (PINO) radical mediated by naphthalene monoimides (NI) for promoting the selective oxidation of alkylaromatics and allylic compounds to the corresponding hydroperoxides. In the absence of either NI or NHPI no oxidation was observed, meaning that the two molecules operate in a synergistic way."
The news reporters obtained a quote from the research from the University of Bologna, "Sunlight as well as artificial UV-light irradiation was necessary in order to perform the process at low temperature (30-35 degrees C). EPR spectroscopy confirmed the role of NI and oxygen in promoting the formation of the superoxide radicals O-2(.-) which, in turn, increased the concentration of PINO radicals during the UV light irradiation of NI/NHPI mixtures in MeCN. The investigation was extended to NI bearing different substituents on the naphthalene moiety. Finally, the synthesis and application of a unique photocatalyst including the NI and NHPI moieties linked by a suitable spacer was also considered. In this case the photocatalyst showed a substrate-dependent behaviour with some peculiarities in comparison to the system where NI and NHPI are independent units in the same reacting system."
According to the news reporters, the research concluded: "This photocatalytic system paves the way to a non-thermal, metal-free approach for CH bond activation towards aerobic oxidation under very mild conditions."
For more information on this research see: Sunlight Induced Oxidative Photoactivation of N-Hydroxyphthalimide Mediated by Naphthalene Imides. Advanced Synthesis & Catalysis, 2013;355(16):3210-3220. Advanced Synthesis & Catalysis can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Advanced Synthesis & Catalysis - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1615-4169)
Our news correspondents report that additional information may be obtained by contacting L. Melone, University of Bologna, Dept. of Chem G Ciamician, I-40126 Bologna, Italy. Additional authors for this research include P. Franchi, M. Lucarini and C. Punta (see also Aromatic Polycyclic Hydrocarbons).
Keywords for this news article include: Italy, Europe, Imides, Bologna, Naphthalenes, Photocatalyst, Nanotechnology, Photocatalytic, Organic Chemicals, Emerging Technologies, Aromatic Polycyclic Hydrocarbons
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