Sensitised (electron-transfer) photochemical reactions of cyclopolysilanes, (R<sup>1</sup>R<sup>2</sup>Si)<sub>n</sub>(n= 3 or 4), in a polar, nucleophilic solvent; electron donating nature of cyclopolysilanes (n= 3–7)
Irradiation (<390 nm) of cyclopolysilanes, (R1R2Si)n(n= 3 or 4), in a mixed solvent (EtOH-MeCN-cyclo-C6H12), with 9,10-dicyanoanthracene as sensitiser, gave the corresponding α-ethoxy-ω-hydropolysilanes resulting from ring-opening addition of ethanol to the polysilanes; a mechanism involving facile electron transfer from the polysilanes is proposed.
在混合溶剂(EtOH-MeCN-cyclo-C 6 H 12)中,用9,10-二氰基蒽作为敏化剂辐照(R 1 R 2 Si)n(n = 3或4 )的环聚硅烷(<390 nm),得到由乙醇开环加成到聚硅烷中而得到的相应的α-乙氧基-ω-氢聚硅烷。提出了一种涉及从聚硅烷容易地进行电子转移的机理。
Emission from the excited state of tetraneopentyldisilene
Fluorescence from tetraneopentyldisilene containing only a silicon–silicon double bond as chromophore is observed with a largestokesshift (7300 cm–1) in methylcyclohexane–isopentane glass at 77K.
在77 K的甲基环己烷-异戊烷玻璃中,观察到从仅含硅-硅双键作为生色团的四戊基二甲苯中发出的荧光,其斯托克斯位移大(7300 cm –1)。
The preparation and properties of the peralkylcyclotrisilane, hexaneopentylcyclotrisilane, and the peralkyldisilene, tetraneopentyldisilen
The reaction of (ButCH2)2SiCl2 with Li in tetrahydronfuran gave the peralkylcyclotrisilane, hexaneopentylcyclotrisilane [(ButCH2)2Si]3(1), which showed a u.v. absorption maximum λmax at 310 nm; irradiation of (1) in a hydrocarbon solvent afforded the peralkyldisilene, tetraneopentyldisilene (ButCH2)2 SiSi(CH2But)2, which was shown to be a coloured compound (λmax 400 nm) owing to the presence of the
的(BU反应吨CH 2)2的SiCl 2与Li在tetrahydronfuran得到peralkylcyclotrisilane,hexaneopentylcyclotrisilane [(卜吨CH 2)2的Si] 3(1),其表现出UV吸收最大值λ最大在310nm; 在烃溶剂中照射(1)得到过烷基二ilene,四新戊基二ilene(Bu t CH 2)2 Si Si(CH 2 Bu t)2,显示为有色化合物(λmax400nm)是由于存在作为发色团的Si- Si键骨架。
Suzuki Hideo, Okabe Kazutoshi, Kato Reiko, Sato Norikazu, Fukuda Yoko, Wa+, Organometallics, 12 (1993) N 12, S 4833-4842