| 聚噻吩衍生物的结构和在金属表面取向的NEXAFS研究 |
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| 引用本文： | 刘香兰,徐法强,李宗木,张文华,闫文胜,王峰.聚噻吩衍生物的结构和在金属表面取向的NEXAFS研究[J].中国科学技术大学学报,2007,37(11):1417-1421. |
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| 作者姓名： | 刘香兰 徐法强 李宗木 张文华 闫文胜 王峰 |
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| 作者单位： | 中国科学技术大学国家同步辐射实验室,安徽合肥,230029 |
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| 摘 要： | 采用电化学方法将噻吩衍生物3-(2-甲氧基苯)噻吩和3-溴代噻吩]聚合沉积到Pt片上,利用同步辐射光源采集聚噻吩衍生物中C的近边X射线吸收精细结构(NEXAFS)谱,以特征吸收峰强度对光的入射角度的依赖性为判据,实验证明了聚噻吩衍生物分子在金属表面的分子取向.由于噻吩环上取代基团电负性的差异,分子在衬底表面的取向有所不同:聚3-(2-甲氧基苯)噻吩无序的堆积在Pt表面,聚3-溴代噻吩倾斜于金属Pt表面.
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| 关 键 词： | 近边X射线吸收精细结构 电化学聚合 分子取向 同步辐射 |
| 文章编号： | 0253-2778（2007）11-1417-05 |
| 收稿时间： | 2007-03-19 |
| 修稿时间： | 2007-05-29 |
NEXAFS study on the structure and orientation of polythiophene derivatives on metal surface |
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| LIU Xiang-lan,XU Fa-qiang,LI Zong-mu,ZHANG Wen-hua,YAN Wen-sheng,WANG Feng.NEXAFS study on the structure and orientation of polythiophene derivatives on metal surface[J].Journal of University of Science and Technology of China,2007,37(11):1417-1421. |
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| Authors: | LIU Xiang-lan XU Fa-qiang LI Zong-mu ZHANG Wen-hua YAN Wen-sheng WANG Feng |
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| Abstract: | The carbon K near edge X-ray absorption fine structure(NEXAFS)spectra of polythiophene derivatives electrochemically polymerized on a flat Pt electrode were recorded using linearly polarized soft X-ray synchrotron radiation.The angle dependent NEXAFS evidenced the preferential orientation of the polymer chain on the metal surface.Different electronic properties of lateral chains on the thiophene rings induced different preferential orientations of the molecule on the substrate surface:the orientation of poly3-(2-methoxyphenyl)thiophene] molecules at the surface is nearly random,while the poly(3-bromothiophene)chains tilt away from the Pt surface. |
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| Keywords: | NEXAFS electrochemical polymerization molecular orientation synchrotron radiation |
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