Raman spectroscopic studies on the structural changes of poly(3-methylthiophene) during heating and cooling processes  

作　　者：CHEN Feng’en ZHANG Jiaxin FU Mingxiao SHI Gaoquan 

机构地区：[1]Department of Chemistry,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Science Bulletin》2002年第21期1791-1793,共3页

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 50073012 and 50133010).

摘　　要：Poly(3-methylthiophene) (PMeT) electrosyn-thesized by direct oxidation of 3-methylthiophene in boron trifluoride diethyl etherate (BFEE) has been studied by Raman spectroscopy in the temperature scale of 123-458 K. Experimental results demonstrate that the thermal stability of PMeT in the oxidized state is much lower than that of the polymer in the neutral state. Furthermore, during the cooling process, the conformation of neutral species changes from a coil-like state into a rod-like state, while the conformation of the oxidized species does not change.Poly(3-methylthiophene) (PMeT) electrosynthesized by direct oxidation of 3-methylthiophene in boron trifluoride diethyl etherate (BFEE) has been studied by Raman spectroscopy in the temperature scale of 123–458 K. Experimental results demonstrate that the thermal stability of PMeT in the oxidized state is much lower than that of the polymer in the neutral state. Furthermore, during the cooling process, the conformation of neutral species changes from a coil-like state into a rod-like state, while the conformation of the oxidized species does not change.

关 键 词：RAMAN SPECTROSCOPY poly(3-methylthiophene) HEATING COOLING THERMAL stability. 

分 类 号：O657.3[理学—分析化学]