Photochemistry of Aliphatic Nitroxide Radicals Grafted onto Activated Aerosil Surface |
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Authors: | N Yu Osokina V I Pergushov M Ya Mel'nikov |
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Institution: | (1) Moscow State University, Moscow, 119899, Russia |
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Abstract: | The mechanism of photoinduced transformations of nitroxide radicals SiON(O·)CH3 (I) and SiOCH2N(O·)CH3 (II) obtained on the activated aerosil surface was studied. The nitroxides were photolyzed with 436-nm light at 77 K. It was shown that the action of light in the long-wavelength absorption band corresponding to the n– * transition resulted in the dissociation of the O–N or C–N bond in radicals I or II, respectively. The quantum yields of these reactions were found to be 0.6 and 0.002, respectively. |
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