Lewis Acid Doped Polyaniline. Part II:  Spectroscopic Studies of Emeraldine Base and Emeraldine Hydrochloride Complexation with FeCl3

Françoise Genoud , Irena Kulszewicz-Bajer , Alexandre Bedel , Jean Louis Oddou , Claudine Jeandey , Adam Proń

Abstract

It is demonstrated that Lewis acid doping of polyaniline in the oxidation state of emeraldine can be conveniently monitored by 57Fe Mössbauer spectroscopy if FeCl3 is used as the dopant. The spectrum of doped polyaniline consists of two doublets with distinctly different Mössbauer parameters which can be unequivocally ascribed to two types of complexing sites (amine and imine nitrogens). From the temperature dependence of the isomer shift and the recoil free absorption, we have calculated Mössbauer lattice temperature ?m? as probed by both complexing sites, which were 83 K for the amine and 126 K for the imine sites. These low values of ?m? imply significant mobility of the dopant at temperatures close to room temperature, which is typical of small molecules inserted into polymer matrices. FeCl3-doped polyaniline is soluble in nitromethane, and acetonitrile and films cast from these solvents show conductivity of 0.2 S/cm. FeCl3-doped polyaniline is also a strong near-infrared absorber.
Author Françoise Genoud - [CEA Grenoble]
Françoise Genoud,,
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, Irena Kulszewicz-Bajer (FC / CPCT)
Irena Kulszewicz-Bajer,,
- Chair Of Polymer Chemistry And Technology
, Alexandre Bedel - [CEA Grenoble]
Alexandre Bedel,,
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, Jean Louis Oddou - [Universite Grenoble Alpes (UGA)]
Jean Louis Oddou,,
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- Université Grenoble Alpes
, Claudine Jeandey - [CEA Grenoble]
Claudine Jeandey,,
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, Adam Proń (FC / CPCT)
Adam Proń,,
- Chair Of Polymer Chemistry And Technology
Journal seriesChemistry of Materials, ISSN 0897-4756
Issue year2000
Vol12
No3
Pages744-749
ASJC Classification2505 Materials Chemistry; 1500 General Chemical Engineering; 1600 General Chemistry
DOIDOI:10.1021/cm990485u
URL http://dx.doi.org/10.1021/cm990485u
Score (nominal)45
Score sourcejournalList
Publication indicators Scopus Citations = 83; WoS Citations = 80; GS Citations = 88.0; Scopus SNIP (Source Normalised Impact per Paper): 2000 = 1.626; WoS Impact Factor: 2006 = 5.104 (2) - 2007=5.536 (5)
Citation count*89 (2020-09-15)
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