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Citation: YU Ying, MA Nian-Fang, HUANG Shi-Qiang. Optical Properties and Stability of Branched Polysilanes[J]. Chinese Journal of Applied Chemistry, ;2008, 25(3): 300-304. shu

Optical Properties and Stability of Branched Polysilanes

1.
Faculty of Material Science and Engineering, Hubei University, Hubei Provincial Key Laboratory of Polymer Materials, Wuhan 430062

Corresponding author: HUANG Shi-Qiang,
Received Date: 4 May 2007
Available Online: 8 September 2007
Fund Project: 湖北省教育厅基金重点资助项目(020094110) (020094110)

One linear polysilane,poly(methylphenyl)silane,and two branched polysilanes poly(phenyl-dimethyl)silane and poly(phenyl-methylphenyl)silane,were synthesized via Wurtz reductive coupling reaction.Their Ultraviolet absorption(UV) and Photoluminescence(PL) spectra were obtained to characterize their optical properties,and thermogravity analysis(TGA) was used to characterize their thermal stability.The absorption bands of the branched polysilanes tailed to visible region and the corresponding emission peaks showed obvious red shift compared with that of the linear one,indicating that the branched polysilanes had lower energy band gap than the linear one.In addition,the branched polysilanes exhibited better thermal stability.Under the irradiation of ultraviolet light of 245 nm,the absorption intensity of the linear polysilane gradually fell with irradiation time,while that of the branched polysilanes remained almost unchanged,indicating that the branched polysilanes had better ultraviolet stability than the linear one.
- polysilane,
- optical properties,
- stability,
- thermo-decomposition kinetics
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