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| A versatile photosensitized oxidation system |
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Under the financial supports of National Nature Science Foundation of China Ministry of Science and Technology of China and Chinese Academy of Sciences, Li-Zhu Wu's group at Technical Institute of Physics and Chemistry and Professor Dongyuan Zhao's group at Fudan UniVersity developed a new versatile photosensitized oxidation system.
They demonstrate that cyclometalated platinum(II) complex can be easily anchored into the pore channels of the ordered mesoporous silica SBA-15 by virtue of coordinative interaction, resulting in a versatile photosensitized oxidation system under oxygen. The efficiency of photosensitized oxidation is upgraded 100 times greater than the previous work in Nafion. Studies on the 1O2 generation provide unambiguous evidence that the olefins in the nano-channels of SBA-15 can be enriched 8 times higher than that in the homogeneous one. The large pore hexagonal channel of SBA-15 is very promising as a nanoreactor for photooxidation. No obvious degradation and leaching of photosensitizers are observed after 10 runs. Only a simple filtration is needed for recycled use of the expensive noble metal catalysts.
This research progress was recently published in J. Am. Chem. Soc. 2006, 128(45), 14685-14690.
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