TY - JOUR
T1 - Spectroscopic studies of the role of silyl radicals in photolysis of polysilanes
AU - Azinović, Davorka
AU - Bravo-Zhivotovskii, D.
AU - Bendikov, M.
AU - Apeloig, Y.
AU - Tumanskii, B.
AU - Vepřek, S.
N1 - Funding Information:
We would like to thank the German Science Foundation, DFG, for the financial support within the framework of the project VE120/13-4 and of the joint Israel–Germany collaborative project VE120/13-5. B.T. and D.B.-Z. are grateful to the Israel Ministry of Immigrant Absorption, State of Israel for a Kamea scholarships.
Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2003/6/11
Y1 - 2003/6/11
N2 - 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.
AB - 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.
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U2 - 10.1016/S0009-2614(03)00717-6
DO - 10.1016/S0009-2614(03)00717-6
M3 - Article
AN - SCOPUS:0038693098
VL - 374
SP - 257
EP - 263
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 3-4
ER -