POLYFURAN - A NEW SYNTHETIC APPROACH AND ELECTRONIC-PROPERTIES

被引:206
作者
GLENIS, S
BENZ, M
LEGOFF, E
SCHINDLER, JL
KANNEWURF, CR
KANATZIDIS, MG
机构
[1] MICHIGAN STATE UNIV,DEPT CHEM,E LANSING,MI 48824
[2] MICHIGAN STATE UNIV,CTR FUNDAMENTAL MAT RES,E LANSING,MI 48824
[3] NORTHWESTERN UNIV,DEPT ELECT ENGN & COMP SCI,EVANSTON,IL 60208
关键词
D O I
10.1021/ja00079a035
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Polyfuran films have been synthesized by electropolymerization of terfuran and investigated as a function of film preparation conditions in both the doped and undoped state. These films have been characterized by infrared spectroscopy, scanning electron microscopy, optical absorption, X-ray photoelectron spectroscopy, dc conductivity, and electron spin resonance measurements. The electrolyte anion (dopant) used for the preparation of these films heavily influences the pi-conjugated system of the polymer backbone. Structural disorder and doping level depends on the nature of the electrolyte anion. CF3SO3- was found to be the best dopant and to cause the least structural disorder or furan ring opening. Electrical conductivities as high as 2 X 10(-3) S/Cm were obtained in the CF3SO3--doped state. The temperature dependence of the electrical conductivity indicates a thermally activated process with semiconductor-like behavior. The charge transport properties are explained in terms of polaron and bipolaron states. The polymer band gap was measured at 2.35 eV.
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页码:12519 / 12525
页数:7
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