EXAFS studies of iodine-doped poly(octylthiophene)

被引：10

作者：

Aasmundtveit, KE ^{[1
]}

Samuelsen, EJ

Steinsland, C

Meneghini, C

Filipponi, A

机构：

[1] NTNU, Inst Fys, N-7034 Trondheim, Norway

[2] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

SYNTHETIC METALS | 1999年 / 101卷 / 1-3期

关键词：

polythiophene and derivatives; X-ray absorption spectroscopy; iodine-doping; polyiodides;

D O I：

10.1016/S0379-6779(98)00749-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Iodine doping of poly(octylthiophene) has been studied by EXAFS. At Tow doping levels, the average interatomic I-I distance is close to 2.9 Angstrom, which shows that the iodine is present mainly as triiodide. When the doping level is increased towards saturation (two I atoms per monomer), the distance decreases gradually to 2.73 Angstrom. This is interpreted as the presence of higher iodine complexes, involving I-2-like units, such as pentaiodide. The measured coordination numbers support this interpretation. The ratio between I-3(-) and I-5(-) decreases monotonically with the total I content. In this model, the I-3(-) content saturates at a total iodine content around 0.5 I atoms per monomer.

引用

页码：363 / 364

页数：2

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