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

Davorka Azinović, D. Bravo-Zhivotovskii, M. Bendikov, Y. Apeloig, B. Tumanskii, S. Vepřek

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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 'star' radical (Me3SiMe2Si) 3Si 2 has half-lifetime 1 s whereas the bigger one (Me3SiMe2Si)3Si (Me3SiMe2Si)2Si 3 has a half-lifetime about 50 min. During irradiation the reaction 1 → 2 + 3 followed by 2 + 3 → products (P) occur. The behavior of the 300 nm absorption of radical 3 during the irradiation was found to be similar to the radical 3 appearance measured by ESR. The silane (Me3SiMe2Si)3SiH was found as main product (∼50% yield) of the photo-cleavage of the disilane 1.

Original languageEnglish
Pages (from-to)257-263
Number of pages7
JournalChemical Physics Letters
Volume374
Issue number3-4
DOIs
Publication statusPublished - Jun 11 2003

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Azinović, D., Bravo-Zhivotovskii, D., Bendikov, M., Apeloig, Y., Tumanskii, B., & Vepřek, S. (2003). Spectroscopic studies of the role of silyl radicals in photolysis of polysilanes. Chemical Physics Letters, 374(3-4), 257-263. https://doi.org/10.1016/S0009-2614(03)00717-6