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Magnetic Resonance and Electrical properties of p-Toluene Sulphonic Acid Doped Polyaniline

IR@NPL: CSIR-National Physical Laboratory, New Delhi

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Title Magnetic Resonance and Electrical properties of p-Toluene Sulphonic Acid Doped Polyaniline
 
Creator Arora, Manju
Arya, S. K.
Barala, Sunil Kumar
Saini, Parveen
 
Subject Materials Science
Applied Physics/Condensed Matter
 
Description p-Toluene Sulphonic Acid (PTSA) doped polyaniline (PANI) analogues were synthesized by oxidative chemical polymerization method and characterized by TGA FTIR and EPR spectroscopic techniques. FTIR spectra indicates the formation of PTSA doped PANI and also revealed the dopant ions mediated interactions between polymeric chain through weak hydrogen bonding. TGA plots revealed that there is systematic variation in the weight loss at similar to 300 degrees C from similar to 4% to similar to 38% with increase in dopant concentration from 0.01 N to 1.0 N. Magnetic resonance spectra of polaron charge carriers exhibit the single Lorentzian line signal with the Dysonian contribution indicating formation of metal-like domains. The polarons are localized in these domains by strong interaction between the neighboring conducting chains, in which the charge is transferred by quasi-three-dimensional (Q3D) delocalized electron. In higher concentration analogue some of polarons merge into diamagnetic bipolarons and this reduces intensity of EPR signal. The electrical conductivity of the 1.0 N PTSA doped sample was similar to 4.5 S/cm which satisfies the EMI shielding criteria.
 
Publisher American Institute of Physic
 
Date 2013
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Identifier http://npl.csircentral.net/3138/1/Magnetic%20resonance%20and%20electrical%20properties.pdf
Arora, Manju and Arya, S. K. and Barala, Sunil Kumar and Saini, Parveen (2013) Magnetic Resonance and Electrical properties of p-Toluene Sulphonic Acid Doped Polyaniline. In: International Conference on Recent Trends in Applied Physics and Material Science (RAM), FEB 01-02, 2013, Govt Coll Engn & Technol Bikaner, Bikaner, INDIA.
 
Relation http://npl.csircentral.net/3138/