Synthesis and Properties of Poly[(1,1-dihexyl-3,4-diphenyl-2,5-silolene)-co-(methylphenylsilylene)]
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Polycarbosilane conjugated with 1,1-dihexyl-3,4-diphenyl-2,5-silolene and methylphenylsilylene, such as poly[(1,1-dihexyl-3,4-diphenyl-2,5-silolene)-co-(methylphenylsilylene)] has been prepared. The characteristic diene stretching frequency appears at 1696-1600 cm-1 in the Fourier-transform infrared spectrum of the polymer. The obtained material is highly soluble in organic solvents such as tetrahydrofuran and chloroform. The molecular weight of the polymer was determined as 1436/1084 (Mw/Mn) with polydispersity of 1.32 by gel permeation chromatography. The prepared material in THF solvent show strong absorption maximum peaks at 249, 261, and 336 nm with molar absorptivities of 2.74×104, 2.57×104, and 3.16×103 cm-1 M-1, respectively, in the UV-visible absorption spectrum, strong excitation maximum peak at 336 nm, and strong emission maximum peak at 398 nm in the fluorescence emission spectrum. Thermogravimetric analysis shows that the polymer is thermally stable up to 200C with a weight loss of 3% only in nitrogen.
Abstract
Polycarbosilane conjugated with 1,1-dihexyl-3,4-diphenyl-2,5-silolene and methylphenylsilylene, such as poly[(1,1-dihexyl-3,4-diphenyl-2,5-silolene)-co-(methylphenylsilylene)] has been prepared. The characteristic diene stretching frequency appears at 1696-1600 cm-1 in the Fourier-transform infrared spectrum of the polymer. The obtained material is highly soluble in organic solvents such as tetrahydrofuran and chloroform. The molecular weight of the polymer was determined as 1436/1084 (Mw/Mn) with polydispersity of 1.32 by gel permeation chromatography. The prepared material in THF solvent show strong absorption maximum peaks at 249, 261, and 336 nm with molar absorptivities of 2.74×104, 2.57×104, and 3.16×103 cm-1 M-1, respectively, in the UV-visible absorption spectrum, strong excitation maximum peak at 336 nm, and strong emission maximum peak at 398 nm in the fluorescence emission spectrum. Thermogravimetric analysis shows that the polymer is thermally stable up to 200C with a weight loss of 3% only in nitrogen.
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