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Double-strand Polyaniline as a Molecular Quasi-Memory to Chemical Stimuli

Published online by Cambridge University Press:  10 February 2011

Gowri P. Kota ,
Linfeng Sun ,
Huaibing Liu  and
Sze C. Yang
Gowri P. Kota
Affiliation:
University of Rhode Island, Dept of Chemistry, Kingston, RI 02881, U.S.A.
Linfeng Sun
Affiliation:
University of Rhode Island, Dept of Chemistry, Kingston, RI 02881, U.S.A.
Huaibing Liu
Affiliation:
University of Rhode Island, Dept of Chemistry, Kingston, RI 02881, U.S.A.
Sze C. Yang
Affiliation:
University of Rhode Island, Dept of Chemistry, Kingston, RI 02881, U.S.A.
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Abstract

We report the apparent hysteresis cycles in the protonation/deprotonation induced conductor-insulator transition for a water-soluble double-strand polyaniline. Experimental evidences show that the polymeric complexes of polyaniline and poly(styrene sulfonic acid) are soluble in water as non-aggregated single molecules. Although the hysteresis loop becomes narrower within 40 hours and the bistability is not permanent, the rate of collapse of the hysteresis loop is extremely slow for a solvated polymer in water. The water soluble polyaniline was compared with solid state samples of PAN:HCl. It was found that, under thermodynamically identical conditions, the memory effect is stronger for the water-soluble polyaniline than the water-insoluble solid of PAN:HCI.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 459
Copyright
Copyright © Materials Research Society 1998

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