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Spectroscopic studies of the role of silyl radicals in photolysis of polysilanes
 

Summary: Spectroscopic studies of the role of silyl radicals in
photolysis of polysilanes
D. Azinovicc a,*, D. Bravo-Zhivotovskii b
, M. Bendikov b
, Y. Apeloig b
,
B. Tumanskii b
, S. Veprrek a
a
Institute for Chemistry of Inorganic Materials, Technical University Munich, Lichtenbergstr. 4, D-85747 Garching/Munich, Germany
b
Department of Chemistry, Technion ­ Israel Institute of Technology, Haifa, Israel
Received 26 July 2002; in final form 28 April 2003
Abstract
Absorption, ESR and photoluminescence of hexakis(pentamethyldisilyl)disilane [(Me3SiMe2Si)3Si]2 1 were studied.
Two branched polysilyl radicals were observed by ESR spectroscopy under UV irradiation of 1. The smaller ÔstarĠ
radical (Me3SiMe2Si)3SiĊ
2 has half-lifetime 1 s whereas the bigger one (Me3SiMe2Si)3Si(Me3SiMe2Si)2SiĊ
3 has a half-
lifetime about 50 min. During irradiation the reaction 1 ! 2 + 3 followed by 2 + 3 ! products (P) occur. The behavior

  

Source: Apeloig, Yitzhak - Department of Chemistry, Technion, Israel Institute of Technology

 

Collections: Chemistry