UV–vis spectroscopy for following the kinetics of homogeneous polymerization of diphenylamine in p-toluene sulphonic acid

Nagarajan, S.; Santhosh, P.; Sankarasubramanian, M.; Vasudevan, T.; Gopalan, A.; Lee, Kwnag-Pill

doi:10.1016/j.saa.2005.01.010

Cited by 15 publications

(11 citation statements)

References 29 publications

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“…Polymerization o f aniline and N-substituted anilines proceed through C-C, N-N and N-C coupling (Nagarajan et al, 2005). However, DPA polymerization proceeds through 4,4'-phenyl-phenyl coupling mechanism and shows no N-C coupling (Nagarajan et al, 2005). Two DPA radicals couple to generate diphenylbenzidine (Figure 4.9.).…”

Section: Optimum Coagulant Concentrationmentioning

confidence: 99%

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Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Saha

Taylor

Bewtra

et al. 2008

Water Environment Research

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The priority pollutant lists of both the U.S. Environmental Protection Agency (U.S. EPA) and the European Union (EU) include diphenylamine (DPA), a contaminant found in wastewater of various industries. This work demonstrates the potential of using enzymatic treatment to remove DPA from buffered synthetic wastewater. This treatment method includes oxidative polymerization of DPA using laccase from Trametes villosa, followed by removal of those polymers via adsorptive micellar flocculation (AMF) using sodium lauryl sulfate (SDS) and alum. Researchers investigated the effects of pH, laccase concentration, molecular mass, and concentration of polyethylene glycol (PEG) in continuously stirred batch reactors to achieve 95% substrate conversion in three hours. Treatment of 0.19 mM DPA was best at pH 7 and an enzyme concentration from 0.0025 to 0.0075 standard activity unit/mL. Except for PEG 400, optimum enzyme and PEG concentrations decreased with an increase in PEG molecular mass. Optimum AMF conditions were pH 3.0 to 6.5, 200 mg/L of SDS, and 150 mg/L of alum.

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Section: Optimum Coagulant Concentrationmentioning

confidence: 99%

“…Two DPA radicals couple to generate diphenylbenzidine (Figure 4.9.). Diphenylbenzidine can further get oxidized and form diphenylbenzidine radical (Nagarajan et al, 2005). This radical can undergo further polymerization and form poly-DPA.…”

Section: Optimum Coagulant Concentrationmentioning

confidence: 99%

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Saha

Taylor

Bewtra

et al. 2008

Water Environment Research

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“…This factor along with the absence of precipitation of polymer during the course of reaction revealed that auto acceleration is less prominent in the presence case. However, a second order dependence of R P4ADPA/AgNC on [4ADPA] was noticed in contrast to first power dependence on ANI [23,29,48]. The mechanism of PANI or substituted PANI involves the attack of radicals produced form the initiator (oxidant) on monomer.…”

Section: Deducing the Rate Expression For Formation Of P4adpa/agncmentioning

confidence: 98%

“…Our research groups have earlier deduced the rate expressions for the polymerization of N-methylaniline [27], diphentlamine-4-sulfonate (DPASA) [28] and DPA [29] in the presence of added substrates. In these cases, the polymers precipitated during course of polymerization.…”

Section: Dependences Of [4adpa] and [Agno 3 ] On R P4adpa/agncmentioning

confidence: 99%

“…Gill et al [24] have studied the kinetics of polymerization of aniline using 1 H NMR spectroscopy. Detailed kinetics of chemical oxidative polymerization of aniline [25], o-toluidine [26], N-methyl aniline [27], diphenylamine-4-sulfonate [28] and diphenylamine [29] in the presence of added substrates have been explained by our research group.…”

Section: Introductionmentioning

confidence: 99%

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Course of poly(4-aminodiphenylamine)/Ag nanocomposite formation through UV–vis spectroscopy

Thanjam

Philips

Komathi

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Synthesis and characterization of polymer/V₂O₅ composites based on poly(2‐aminodiphenylamine)

et al. 2020

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Hybrid materials consisting of aniline (ANI) and/or 2-aminodiphenylamine (PD) in the presence of V 2 O 5 nanoparticles were synthesized by in-situ chemical oxidative polymerization in one-step. Physicochemical and electrochemical characterization confirmed that in the structure of the composites, intercalation between the polymer chains and the V 2 O 5 slabs occurs. Optical properties study shows that the optical band gap of poly(ANI-co-PD)/V 2 O 5 is lower than poly-PD/ V 2 O 5. Thermal stability of the composites by thermogravimetric analysis was evaluated. Composites showed electrochemical activity with improved electrontransfer of the redox species in the polymer observed by cyclic voltammetry. These results highlight the great influence of the V 2 O 5 sheets and the polymer composition on the hybrid materials formation and properties.

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UV–vis spectroscopy for following the kinetics of homogeneous polymerization of diphenylamine in p-toluene sulphonic acid

Cited by 15 publications

References 29 publications

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Course of poly(4-aminodiphenylamine)/Ag nanocomposite formation through UV–vis spectroscopy

Synthesis and characterization of polymer/V₂O₅ composites based on poly(2‐aminodiphenylamine)

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UV–vis spectroscopy for following the kinetics of homogeneous polymerization of diphenylamine in p-toluene sulphonic acid

Cited by 15 publications

References 29 publications

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Course of poly(4-aminodiphenylamine)/Ag nanocomposite formation through UV–vis spectroscopy

Synthesis and characterization of polymer/V2O5 composites based on poly(2‐aminodiphenylamine)

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Synthesis and characterization of polymer/V₂O₅ composites based on poly(2‐aminodiphenylamine)