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

被引：10

作者：

Vibert, Francois ^{[1
]}

Marque, Sylvain R. A. ^{[1
]}

Bloch, Emily ^{[2
]}

Queyroy, Severine ^{[1
]}

Bertrand, Michele P. ^{[1
]}

Gastaldi, Stephane ^{[1
]}

Besson, Eric ^{[1
]}

机构：

[1] Aix Marseille Univ, CNRS, Inst Chim Radicalaire, UMR 7273, F-13397 Marseille 20, France

[2] Aix Marseille Univ, CNRS, MADIREL, UMR 7246, F-13397 Marseille 20, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 10期

关键词：

ELECTRON-PARAMAGNETIC-RESONANCE; PHENETHYL PHENYL ETHER; FLASH-PHOTOLYSIS; MFI ZEOLITES; KINETICS; CONFINEMENT; PYROLYSIS; MOLECULES; RATES;

D O I：

10.1021/jp5117382

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bis-silylated diazenes were designed to prepare wall-functionalized hybrid silieas Via the sol-gel process. These precursors enabled the Straightforward generation of arylsulfanyl radicals by either photolysis or thertnolysis. Theif locatioir in the framework Of the megipotots materials was evidenced by spin trapping experiments: The incidence of confinement on the radical lifetime was investigated by electron pararnagnetic resonance (EPR). An amazing persistence (t(1/2) = 27 min) was recorded at 473 K.

引用

页码：5434 / 5439

页数：6

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