Oxidative polymerization of phenylenediamines catalyzed by horseradish peroxidase

Ichinohe, Daigo; Muranaka, Toshitaka; Sasaki, Taro; Kobayashi, Masami; Kise, Hideo

doi:10.1002/(sici)1099-0518(199810)36:14<2593::aid-pola19>3.0.co;2-d

Cited by 72 publications

(64 citation statements)

References 15 publications

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“…The intrinsic viscosity of the copolymers is comparable to that of PANI, but the solubilities of the copolymers and PANI are much different from each other. These results indicate that solubility is primarily determined by molecular structure rather than by the intrinsic viscosity of the polymers 20, 21…”

Section: Resultsmentioning

confidence: 89%

A new approach to soluble polyaniline and its copolymers with toluidines

Swaruparani

Basavaraja

et al. 2010

J of Applied Polymer Sci

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Homopolymers of aniline, toluidines and their copolymers were synthesized by chemical oxidative polymerization using different ratios of monomers in the feed in H 2 SO 4 medium. The synthesized polymers were characterized by employing Fourier transform infrared, UV-visible, proton nuclear magnetic resonance, X-ray diffraction techniques for understanding the details of the structure of the synthesized polymers. Morphological, thermal, and electrical conductivity of the as synthesized polymers were also studied by employing scanning electron microscopy, thermogravimetric analysis, and dc electrical conductivity, respectively. From the SEM images rod shaped nanoparticles were observed in PANI and spherical shaped nanoparticles were observed for copolymers. A three-step thermal degradation was observed for all the polymers. The electrical conductivities of the copolymers were less compared with PANI, and at higher temperature the conductivities of all the polymers were more or less same. It was observed that yield and intrinsic viscosity of copolymers are not regularly dependant on monomer concentration in the feed. The copolymers show better solubility but lower conductivity than PANI. Properties of homopolymers and copolymers are also pointed out.

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Section: Resultsmentioning

confidence: 89%

A new approach to soluble polyaniline and its copolymers with toluidines

Swaruparani

Basavaraja

et al. 2010

J of Applied Polymer Sci

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“…20 The broad band centered at 3377 cm À1 , a result of the characteristics free N-H stretching vibration, suggests the presence of secondary amino group (-NH-). 23 The small shoulder band at 3293 cm À1 corresponds to the hydrogen-bonded N-H vibration. The peak at about 3029 cm À1 might be due to C-H stretching on the benzene ring.…”

Section: Resultsmentioning

confidence: 99%

Corrosion performance of chemically synthesized poly(aniline-co-o-toluidine) copolymer coating on mild steel

Mobin

Tanveer

2011

J Coat Technol Res

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A soluble copolymer from aniline and o-toluidine [poly(aniline-co-o-toluidine)] was synthesized by chemical oxidative copolymerization using ammonium persulphate as an oxidant in hydrochloride aqueous medium. The resultant copolymer was characterized by Fourier Transform Infrared (FTIR) spectroscopy and chemically deposited on mild steel specimens using N-methyl-2-pyrrolidone (NMP) as solvent via solution evaporation method. The anticorrosive properties of copolymer coating was investigated in major corrosive environments, such as 0.1 M HCl, 5% NaCl solution, artificial seawater, distilled water and open atmosphere by conducting various corrosion tests which include: immersion test, open circuit potential (OCP) measurements, potentiodynamic polarization measurements and atmospheric exposure test. The corrosion performance of copolymer coating was also compared separately with polyaniline (PANi) and poly(o-toluidine) (POT) homopolymer coatings. The surface morphologies of polymer coatings were evaluated using scanning electron microscopy (SEM). The synthesized copolymer exhibited excellent protection against mild steel corrosion; the protection efficiency being in the range of 78-94% after 30 days of immersion. The corrosion performance of copolymer in 5% NaCl and artificial seawater was comparable, which was only marginally better than in 0.1 M HCl. In general, the performance of copolymer coating was found to be better than that of homopolymer coatings.

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“…44 Furthermore, the band at 758 cm À1 is the characteristic band of C-H out-ofplane bending vibrations of the benzene nuclei. 44,45 It was also noted that the other peaks exhibited little shi. The resulting E-RGO and the PoPD/E-RGO nanocomposite were also characterized by SEM.…”

Section: Resultsmentioning

confidence: 99%

An electrochemical sensor for dopamine based on poly(o-phenylenediamine) functionalized with electrochemically reduced graphene oxide

2014

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The electropolymerization of o-phenylenediamine was performed on an electrochemically reduced graphene oxide (E-RGO)/glass carbon electrode (GCE) (E-RGO/GCE). It was found that this novel poly(ophenylenediamine) (PoPD)/E-RGO (PoPD/E-RGO) hybrid composite showed good electrocatalytic activity toward dopamine (DA) and good specificity for the detection of DA without interference from ascorbic acid (AA) or uric acid (UA). Differential pulse voltammetry was used for the electrochemical DA detection. The response peak current for the electrochemical sensor was linear over the ranges of 10 to 400 mM (r ¼ 0.996) and 400 mM to 800 mM (r ¼ 0.997). The detection limit was estimated to be 7.5 mM.The electrochemical sensor also exhibited good stability. In addition, the electrochemical sensor was successfully applied to the detection of DA in human urine samples using the standard adding method with satisfactory results.

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Oxidative polymerization of phenylenediamines catalyzed by horseradish peroxidase

Cited by 72 publications

References 15 publications

A new approach to soluble polyaniline and its copolymers with toluidines

A new approach to soluble polyaniline and its copolymers with toluidines

Corrosion performance of chemically synthesized poly(aniline-co-o-toluidine) copolymer coating on mild steel

An electrochemical sensor for dopamine based on poly(o-phenylenediamine) functionalized with electrochemically reduced graphene oxide

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