Citation: Xian-kai Lin, Rui Wang, Fan Zeng, Shu-hong Li, Cai-hong Xu. Effect of Flexible Units on the Properties of Silicon-containing Phenyleneethynylene Hybrid Oligomers[J]. Chinese Journal of Polymer Science, ;2016, 34(1): 52-58. doi: 10.1007/s10118-016-1726-3 shu

Effect of Flexible Units on the Properties of Silicon-containing Phenyleneethynylene Hybrid Oligomers

Xian-kai Lin ^1,2,3 ,
Rui Wang ⁴ ,
Fan Zeng ⁴ ,
Shu-hong Li ⁵ ,
Cai-hong Xu ⁴

1.
1. School of Science, Beijing Technology and Business University, Beijing 100048, China
2.
2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3.
4.
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
5.
School of Science, Beijing Technology and Business University, Beijing 100048, China

Received Date: 27 June 2015
Revised Date: 7 August 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 50673094 and 20774102).

New silicon-containing phenyleneethynylene hybrid oligomers P2, P3, and P4 were synthesized via Sonogashira cross-coupling reactions of ethynyl-terminated silazane monomer N,N'-bis(4-ethynylphenyl)-1,1-diphenylsilazane (M1) and corresponding bis-(4-bromo-phenyl)-ended organosilicon unit containing monomers, respectively. These new oligomers were easily soluble in common solvents. The incorporation of flexible organosilicon units in the oligomers leads to blue-shift in both the UV-Vis absorption and fluorescence emission spectra similarly. The results of differential scanning calorimetry (DSC) indicate that the flexible units relieve the rigidity of oligomeric chain and provide favorable conformation for thermal cross-linking reactions. The oligomers show good thermal and thermal-oxidative stability from the thermogravimetric analysis (TGA), with their decomposition temperature at 10% weight loss (T10%) higher than 400℃ under both nitrogen and air atmosphere.
- Sonogashira cross-coupling,
- Organosilicon unit,
- Hybrid oligomers,
- Thermal properties
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