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Polarons, Bipolarons, and Crystallization in Conducting Polymers: An ESR Study
Author(s) -
Sercheli M.S.,
Walmsley L.,
Rettori C.,
Correa A.A.,
Bulhões L.O.S.,
Pereira E.C.
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200007)220:1<631::aid-pssb631>3.0.co;2-0
Subject(s) - polaron , electron paramagnetic resonance , crystallization , doping , materials science , condensed matter physics , polymer , spin (aerodynamics) , conductive polymer , bipolaron , nuclear magnetic resonance , pellets , chemistry , electron , physics , organic chemistry , thermodynamics , quantum mechanics , composite material
Electron spin resonance (ESR) experiments give extremely important information concerning spin arrangements in conducting polymers. This is evidenced by the behavior of the ESR lines as a function of temperature and microwave power. Our ESR data of pressed pellets of ClO — 4 doped poly(3‐methylthiophene) (P3MT) synthesized at 25 °C show the predominance of polarons. Instead, the sample prepared at 5 °C shows the predominance of bipolarons. Besides, for both types of samples, crystallization, observed from the ESR data, has shown a rearrangement of spin species.