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Multifrequency EPR Analysis of the Positive Polaron in I2-doped poly(3-hexylthiophene) and in poly[2-methoxy-5-(3,7-dimethyloctyloxy)]-1,4-phenylenevinylene

Multifrequency EPR Analysis of the Positive Polaron in I2-doped poly(3-hexylthiophene) and in poly[2-methoxy-5-(3,7-dimethyloctyloxy)]-1,4-phenylenevinylene

Aránzazu Aguirre, Peter Gast, Sergey Orlinskii, Ikuko Akimoto, Edgar J J Groenen, Hassane El Mkami, Etienne Goovaerts, Sabine Van Doorslaer

Phys Chem Chem Phys. 2008 Dec 21;10(47):7129-38.

PMID: 19039347

Abstract:

The W-band continuous-wave electron paramagnetic resonance (EPR) analysis of chemically induced polarons in drop-cast and spin-coated polyphenylenevinylene-type and polythiophene-type polymer films reveals rhombic g tensors in both cases. The dependence of the W-band EPR signals on the orientation of the spin-coated films with respect to the magnetic field indicates a high degree of backbone alignment with the substrate and allows a partial assignment of the g tensor orientation. The derived molecular orientations of the polymer chains in the spin-coated films show clear differences between the two types of polymers. The proton hyperfine interactions obtained from X-band HYSCORE (hyperfine sublevel correlation) and Q- and W-band pulsed ENDOR (electron-nuclear double resonance) experiments are interpreted in terms of earlier theoretical studies on the extension of the polarons.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS772196	Poly[2,5-bis(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene]			Price

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