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American Chemical Society, Journal of Physical Chemistry C, 10(119), p. 5434-5439, 2015

DOI: 10.1021/jp5117382

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Design of Wall-Functionalized Hybrid Silicas Containing Diazene Radical Precursors. EPR Investigation of Their Photolysis and Thermolysis

Journal article published in 2015 by François Vibert, Sylvain R. A. Marque ORCID, Emily Bloch, Michèle P. Bertrand, Séverine Queyroy, Stéphane Gastaldi, Eric Besson, Sylvain R. A. Marque
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

Bis-silylated diazenes were designed to prepare wall-functionalized hybrid silicas via the sol–gel process. These precursors enabled the straightforward generation of arylsulfanyl radicals by either photolysis or thermolysis. Their location in the framework of the mesoporous materials was evidenced by spin trapping experiments. The incidence of confinement on the radical lifetime was investigated by electron paramagnetic resonance (EPR). An amazing persistence (t1/2 = 27 min) was recorded at 473 K.