Esters of 5-sulfo-i-phthalic acid as new dopants improving the solution processibility of polyaniline: spectroscopic, structural and transport properties of the doped polymer

Irena Kulszewicz-Bajer , Małgorzata Zagórska , J Nizioł , Adam Proń , W Łużny


Three esters of 5-sulfo-i-phthalic acid, namely di(n-amyl) (ASIP), di(2-butoxyethyl) (BESIP) and di(2-butoxy-2-ethoxyethyl) (BEESIP) 5-sulfo-i-phthalates, were synthesized and tested as polyaniline doping agents with the goal of improving its solution processibility. Polyaniline protonated with these acidic esters is soluble in chloroform, diethyl ketone, hexafluoro-2-propanol, m-cresol and dichloroacetic acid. Solutions of PANI(BESIP)0.5 in dichloroacetic acid (DCAA) are especially interesting because their spectra are strongly concentration-dependent, showing the change in polymer conformation upon the dilution. The spectra of diluted solutions exhibit features characteristic of the conformation that favors localized charge carriers, whereas with increasing polymer concentration, features ascribed to delocalized charge carriers begin to dominate the spectrum. Diffractograms of PANI(BESIP)0.5 and PANI(BEESIP)0.5 films cast from DCAA, in addition to a broad amorphous halo, show a sharp Bragg reflection at low angles (2θ=2–4°), which is indicative of self-organized supramolecular structures previously observed for other polyelectrolyte like systems with amphiphilic counterions. The highest conductivity (85 S/cm at RT) was obtained for PANI(BESIP)0.5.
Author Irena Kulszewicz-Bajer (FC / CPCT)
Irena Kulszewicz-Bajer,,
- Chair Of Polymer Chemistry And Technology
, Małgorzata Zagórska (FC / CPCT)
Małgorzata Zagórska,,
- Chair Of Polymer Chemistry And Technology
, J Nizioł - [CEA Grenoble]
J Nizioł,,
, Adam Proń (FC / CPCT)
Adam Proń,,
- Chair Of Polymer Chemistry And Technology
, W Łużny - [AGH University of Science and Technology (AGH)]
W Łużny,,
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Journal seriesSynthetic Metals, ISSN 0379-6779
Issue year2000
Keywords in EnglishEsters of 5-sulfo-i-phthalic acid, Polyaniline, protonation
ASJC Classification2505 Materials Chemistry; 2506 Metals and Alloys; 2210 Mechanical Engineering; 2211 Mechanics of Materials; 3104 Condensed Matter Physics; 2504 Electronic, Optical and Magnetic Materials
Languageen angielski
Score (nominal)30
Score sourcejournalList
Publication indicators Scopus Citations = 28; WoS Citations = 20; GS Citations = 33.0; Scopus SNIP (Source Normalised Impact per Paper): 2014 = 0.943; WoS Impact Factor: 2006 = 1.685 (2) - 2007=1.681 (5)
Citation count*33 (2020-09-15)
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