Synthesis and characterization of pyrrole and m-toluidine copolymers

Li, Xin‐Gui; Huang, Mei‐Rong; Wang, Lin-Xia; Zhu, Meifang; Menner, Angelika; Springer, J.

doi:10.1016/s0379-6779(01)00317-4

Cited by 44 publications

(20 citation statements)

References 16 publications

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“…The only conducting state is the greencolored emeraldine salt (ES), which is the protonated form of EB. 18,19 Some of reports are available on the studies of polytoluidines such as synthetic and characterization of pyrrol and m-toluidin copolymer 20 and the single-step polymerization of conducting poly(o-toluidin) and camphor sulfonic acid, 21 in addition to the synthesis, characterization, and electrical properties of poly(m-toluidine)/modified carbon nanotubes conducting polymer composites. 19 Here, the electrochemical anodic polymerization of mtoluidin on a Pt electrode from aqueous acid solution is investigated using the cyclic voltammetry technique.…”

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confidence: 99%

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

2016

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ABSTRACT:The electrochemical anodic electropolymerization of m-toluidin on a Pt electrode from a deoxygenated aqueous acid medium is carried out using the cyclic voltammetry technique. The effects of different parameters on the electrochemical polymerization such as the monomer, sulfuric acid, sodium sulfate concentrations, scan rate, and temperature are investigated using a conventional three-electrode cell. The results show the presence of an oxidation peak (anodic current peak) at approximately +1110 mV vs. saturated calomel electrode in all cases of the investigated parameters. A gradual increase in the anodic current peak density (I p ) is observed with a repeating number of cycles accompanied with the appearance of a new peak at low positive potential from the second repeating cycle. In addition, the effects of m-toluidin, sulfuric acid, sodium sulfate concentrations, scan rate, and temperature values have the same behavior on I p values, in which there is an increase in I p values till certain values (different for each parameter) and then decrease. The experimentally obtained kinetic equation is deduced from values of I p , and a simplified mechanism for the electrochemical anodic polymerization of m-toluidin is proposed. Moreover, the diffusion coefficient, activation energy (E a ), and thermokinetic parameters such as entropy ( S*), enthalpy of reaction ( H*), and free energy change ( G*) are calculated. The prepared polymer is characterized by elemental analysis, UV-visible, IR, 1 H NMR, X-ray diffraction, SEM, and TGA. C

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confidence: 99%

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

2016

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“…As seen from Fig. 1, the typical -NH stretching vibration peak was observed at 3378 cm -1 , the peak at around 1539 cm -1 assigned to -C=C stretch of Py ring and the peak at 1045 cm -1 is caused by -CH in-plane deformation of the Py unit [25]. The infrared spectrum of Dx-SO 4 showed strong peak at 3550 cm -1 could be assigned to the axial stretching vibration of O-H and interchain hydrogen bonds of polysaccharide; C-H stretching at 2895, two characteristic absorption bands one at 1399 cm -1 , related to an asymmetrical S=O vibration, and the other one at 805 cm -1 , indicating a symmetrical C-O-S vibration associated to the C-O-SO 3 [26,27].…”

Section: Ft-ir Spectroscopymentioning

confidence: 83%

“…6b), the weight loss was observed within the temperature range of 191-383°C which could be assigned to the loss of doping anions in PPy/Dx-SO 4 composite chains, the decomposition of PPy oligomers and loss of unbounded dopant [25], and the decomposition of free Dx-SO 4 [29], and PPy [30] chains. As a result, it can be clearly stated that the composite exhibited better thermal stability than Dx-SO 4 .…”

Section: Thermal Analysismentioning

confidence: 94%

“…The strong peak at 2.5 ppm is due to protons of DMSO. The broad and very short peak at d = 11.8 ppm is related to OH protons of the dextran sulphate in copolymer and it is difficult to be seen due to intra-or inter-molecular hydrogen bonding [25]. The strong peaks 4-5.5 ppm the spectra are assigned to the specific peak of dextran [28].…”

Section: H-nmr Spectra Of the Ppy/dx-so 4 Compositementioning

confidence: 99%

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Preparation and characterization of polypyrrole/dextran sulphate composite: its electrochemical and thermal behaviors

2015

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Polypyrrole/dextran sulphate (PPy/Dx-SO 4 ) composite was synthesized in 1 M HCl medium by chemical polymerization method. The synthesized composite was characterized using 1 H-NMR, UV-Vis, FT-IR, SEM micrographs, cyclic voltammetry, TG-DTA and viscosity measurements. The SEM micrographs were clearly indicated that PPy, Dx-SO 4 and PPy/Dx-SO 4 composite have different morphology. The composite architecture is also seen alike as globular and agglomerate particles. The composite has better thermal stability than Dx-SO 4 . The results of the solubility studies indicated that the composite partially dissolved in DMSO, DMF, and NMP. Additionally, the composite was more soluble in these solvents than PPy, providing technological usefulness. The electrochemical studies showed that PPy/Dx-SO 4 composite has low electrical conductivity, but it has good electrochemical stability than PPy.

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“…For Pmc, the characteristic IR peak observed at 1023 cm 21 may have been due to the . 31 The FTIR spectra of the POT and POT/ Pmc composite showed bands at 1590 and 1497 cm 21 , which corresponded to the CÀ ÀC ring stretching vibration of the quinoid and benzenoid forms [ Fig. 1(b)].…”

Section: Resultsmentioning

confidence: 99%

Composites of poly(2‐chloroaniline) and poly(o‐toluidine) with pumice and their application in the removal of chromium(VI) ions from aqueous solutions

Gök

Göde

2007

J of Applied Polymer Sci

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Poly(2-chloroaniline) (P2ClAn)/pumice (Pmc) and poly(o-toluidine) (POT)/Pmc composites were synthesized via the chemical oxidative polymerization of 2-chloroaniline and o-toluidine in the presence of a dispersion of Pmc powders in water solvent with an (NH 4 ) 2 S 2 O 8 oxidant. The composites were characterized with Fourier transform infrared (FTIR) spectroscopy, thermo-gravimetric/differential thermal analysis (TG-DTA), and scanning electron microscopy devices. The presence of P2ClAn and POT in the structure of the composites was confirmed by FTIR. The results of analysis show strong interactions between the homopolymers and Pmc. The applicability of the P2ClAn/ Pmc and POT/Pmc composites were investigated for the removal of Cr(VI) ions in water. Batch adsorption experiments were carried out as a function of pH, initial concentration, time, adsorbent dosage, and temperature. The batch sorption kinetics were tested, and the applicability of the Langmuir and Freundlich adsorption isotherms for this system was tested at 20 6 18C. An initial pH of 3.0 was most favorable for Cr(VI) removal by all adsorbents. The adsorption capacities obtained were 0.187 and 4.959 mmol/g of adsorbent for POT/Pmc and P2ClAn/Pmc from the Freundlich and Langmuir adsorption isotherms, respectively.

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Synthesis and characterization of pyrrole and m-toluidine copolymers

Cited by 44 publications

References 16 publications

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

Preparation and characterization of polypyrrole/dextran sulphate composite: its electrochemical and thermal behaviors

Composites of poly(2‐chloroaniline) and poly(o‐toluidine) with pumice and their application in the removal of chromium(VI) ions from aqueous solutions

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