Acid–base equilibrium in conducting polymers. The case of reduced polyaniline

Marmisollé, Waldemar A.; Florit, M.I.; Posadas, D.

doi:10.1016/j.jelechem.2014.03.003

Cited by 24 publications

(18 citation statements)

References 59 publications

(100 reference statements)

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“…However, as indicated by the SPR and UV-visible results, this does not affect the film formation, which is essentially the same as with PSS. This is not surprising as Pani has been also reported to form LbL assemblies with nonionic polymers via hydrogen bonding formation [48], as not all backbone N atoms are expected to be protonated even in acidic solutions [82].…”

Section: (Figure 6) (Figure 7)mentioning

confidence: 79%

Amine-appended polyaniline as a water dispersible electroactive polyelectrolyte and its integration into functional self-assembled multilayers

Marmisollé

Maza

Moya

et al. 2016

Electrochimica Acta

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We present an effective and simple method for the synthesis of poly(3-aminobenzylamine) (PABA) using a chemical oxidation strategy in aqueous solution. The polymer was characterized by NMR, LDI-TOF mass spectrometry, UV-visible, XPS and ATR-FTIR spectroscopies. Stable acidic dispersions were employed for the construction of layer-by-layer assembled films with polyanions, which effectively act as dopants of the electroactive component as revealed by spectroscopic analysis. The assembled films were electroactive in neutral solutions, probably owing to the combination of the doping effect by the polyanions and the self-doping effect of the protonated amino groups of the PABA backbone. These layers showed an electrocatalytic effect on the ascorbic acid oxidation. The advantages of employing PABA instead of polyaniline include improved electroactivity in neutral solution, good processability owing to its higher solubility in acidic solutions and increased interaction with anionic counterparts, which may propel its integration with electroactive biomolecules or conducting nanomaterials for the design of bioelectrochemical devices and energy storage applications.

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Section: (Figure 6) (Figure 7)mentioning

confidence: 79%

Amine-appended polyaniline as a water dispersible electroactive polyelectrolyte and its integration into functional self-assembled multilayers

Marmisollé

Maza

Moya

et al. 2016

Electrochimica Acta

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“…Furthermore, it has been reported that the two redox processes overlap partially for ethyl substitution and almost totally for propyl substitution . The dependence of the first redox transition of PANI on the pH value is complex and, although it initially shifts to lower potentials as the pH increases, it generally shifts to higher potentials . The second redox transition also strongly depends on pH.…”

Section: Resultsmentioning

confidence: 99%

Polyanilines with Pendant Amino Groups as Electrochemically Active Copolymers at Neutral pH

et al. 2015

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One of the most promising fields of application of polyaniline (PANI)‐based modified electrodes is the construction of biosensors. However, PANI itself is not electroactive in neutral media. This problem can be solved by copolymerization of aniline with other monomers. Herein, we present a study of the electrosynthesis and electrochemical performance of copolymer films of 3‐aminobenzylamine and aniline. These films are both stable and electroactive in acid and neutral media. They can even be employed as mediators of ascorbic acid oxidation, showing variable electrocatalytic activity depending on the copolymer composition. The presence of different proportions of pendant amino groups was confirmed by using XPS. These groups are responsible for the increased electroactivity in neutral solution. The copolymer films studied here can be used as versatile building blocks in the construction of bioelectroactive assemblies.

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“…The literature pKaE values were collected by Marmisollé et al 37 A great dispersion was observed, which can be attributed to the different conditions of polymer synthesis. () Cushman et al 31 The E1/2 -pH or acidity function H0 diagram of PTFANI was presented in Fig.…”

Section: Influence Of the Ph On The Electrochemical Behavior Of The Fmentioning

confidence: 99%

Comprehensive Study of Poly(2,3,5,6-tetrafluoroaniline): From Electrosynthesis to Heterojunctions and Ammonia Sensing

Mateos

Meunier‐Prest

Heintz

et al. 2018

ACS Appl. Mater. Interfaces

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In this work, we report for the first time on a comprehensive study of poly(2,3,5,6-tetrafluoroaniline) (PTFANI). Contrary to the nonfluorinated polyaniline (PANI) or its analogues bearing one fluorine atom, PTFANI is a poorly conductive material. We present a comprehensive study of the electrosynthesized PTFANI from its monomer in an acidic aqueous medium. PTFANI was fully characterized by a potential-pH diagram, spectroelectrochemistry, and electrochemical quartz crystal microbalance (EQCM) measurements, as well as by a morphological study. Combined with the X-ray photoelectron spectroscopy (XPS) analysis, it allowed us to understand the redox properties of this polymer compared to those of the unsubstituted PANI. At pH < 1.85, no proton transfer occurred during the electrochemical process, but the insertion of anions at the site of the protonated imines was demonstrated through the EQCM and XPS experiments. PTFANI showed a lower ratio of 1 ClO per 3 2,3,5,6-tetrafluoroaniline units compared to that of PANI. The behavior at pH > 1.85 was different; no anion upload was observed during the electron transfer, but 1 H per electron was involved during the transition between the leucoemeraldine and emeraldine base forms. It should also be noted that the oxidation of the emeraldine into the pernigraniline form was not accessible in PTFANI because of the electron-withdrawing effects of the fluorine atoms. However, we took advantage of the unique behavior of PTFANI to build heterojunctions, by combining with a highly conductive molecular material, namely lutetium bisphthalocyanine, LuPc. The obtained double-lateral heterojunction exhibited a particularly interesting sensitivity to ammonia, even under humid atmospheres, with a limit of detection of 450 ppb. This work paves the way for the use of PTFANI in other electronic devices and as a sensor not only in the field of air quality monitoring but also in the field of health diagnosis in measuring the human breath.

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Acid–base equilibrium in conducting polymers. The case of reduced polyaniline

Cited by 24 publications

References 59 publications

Amine-appended polyaniline as a water dispersible electroactive polyelectrolyte and its integration into functional self-assembled multilayers

Amine-appended polyaniline as a water dispersible electroactive polyelectrolyte and its integration into functional self-assembled multilayers

Polyanilines with Pendant Amino Groups as Electrochemically Active Copolymers at Neutral pH

Comprehensive Study of Poly(2,3,5,6-tetrafluoroaniline): From Electrosynthesis to Heterojunctions and Ammonia Sensing

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