Soluble polypyrrole copolymers

Ustamehmetoğlu, Belkıs; Kızılcan, Nilgün; Saraç, A. Sezai̊; Akar, Ahmet

doi:10.1002/app.1944

Cited by 34 publications

(26 citation statements)

References 13 publications

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“…The IR spectra in KBr discs of electrochemically prepared polypyrrole films with FSO 3 H and LiClO 4 are shown in Figure 2 (a) and (b). The peaks at 1,542 cm −1 are attributed to C=C stretching vibration of pyrrole 27. The peaks at 1,690 and 1,360 cm −1 indicate the presence of C=N and C–N vibrations in PPy 28.…”

Section: Resultsmentioning

confidence: 97%

Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution

Şahin

Aydın

Udum

et al. 2004

J of Applied Polymer Sci

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The incorporation of SO 3Ϫ groups into a polypyrrole backbone was successfully carried out using FSO 3 H/acetonitrile medium. The degree of sulfonation (sulfonation or sulfur-to-nitrogen ratio) of polymer was controlled by varying FSO 3 H concentration while the film was being electrodeposited. The cyclic voltammograms of the electrodeposited films were taken between Ϫ1.00 and ϩ2.00 V (versus Ag/AgCl) in blank solution. A substantial effect on the electrical conductivity was observed upon the incorporation of SO 3 Ϫ groups in the polypyrrole polymeric chain.The elemental analysis results of the freshly prepared and reduced films give independent evidence that the SO 3

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Section: Resultsmentioning

confidence: 97%

Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution

Şahin

Aydın

Udum

et al. 2004

J of Applied Polymer Sci

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“…Despite these advantages, the main drawback of PPy is its poor solubility in most common solvents which restricts its processability and makes it difficult to study optical and morphological properties of this polymer in solution phase. [28][29][30][31][32] An alternative route to enhance the solubility and processability of PPy is utilization of surfactant molecules as electrostatic stabilizers. A first approach toward increasing the solubility of PPy is to substitute pyrrole monomer at either carbon 18,19 or nitrogen 20,21 atoms and then polymerize the new derivatives into PPy.…”

Section: Introductionmentioning

confidence: 99%

Soluble fluorescent polymeric nanoparticles based on pyrrole derivatives: synthesis, characterization and their structure dependent sensing properties

Alizadeh

Akbarinejad

2015

J. Mater. Chem. C

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Electrostatic stabilization concept based on an anionic surfactant, dodecylbenzenesulfonate (DBS -), was applied to prepare soluble and fluorescent polypyrrole (PPy) nanoparticles. The effect of N-substitution as well as synthesis conditions, i.e. surfactant to monomer mole ratio and oxidant addition type (one-step or multi-step) on the size, molecular weight, structure and spectroscopic properties of polymer nanoparticles was evaluated. PPy nanoparticles synthesized at surfactant to monomer mole ratio of 0.20:1 and five-step addition of oxidant show the most intense fluorescence, narrowest particle size and lowest molecular weight. FT-IR, UV-vis, XPS and ICP-OES confirmed that surfactant molecules are incorporated into the polymer structures. The synthesized polymer nanoparticles were classified into two categories based on their conductivities in solution phase and ICP-OES measurements: the indissociable polymer nanoparticles (PPy) which contain only anion dopant surfactants and dissociable polymer nanoparticles, poly N-methyl pyrrole (NmPPy) and poly N-phenyl pyrrole (NphPPy), which contain anion dopant and hydrophobically attached surfactant molecules. The experimental results of conductometry, XPS, ICP-OES and GPC were combined to propose polymer unit structures for all the synthesized polymer nanoparticles. The UV-vis and fluorescence measurements in different solvents were used to gain insight into the dipole moments of excited and ground states of polymer nanoparticles. Finally the potential application of the polymer nanoparticles in fluorescence sensors was investigated by recording their response to various chemical species and found that polymer nanoparticles have structure dependent sensing behaviors. PPy and NmPPy nanoparticles show the most sensitive response to C=S containing and nitro-aromatic compounds respectively, while NphPPy nanoparticles exhibit a selective and profound response to Fe +3 ion. The results of this work will benefit the scientists who are working on the synthesis and basic studies on soluble polymer materials and design of advanced fluorescence sensors. Graphical abstract:Synthesis, characterization and sensing properties of soluble fluorescent polymeric nanoparticles based on pyrrole derivatives.

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“…In this case, the conducting polymer might lose some of the useful optical and electronic properties. In this study, it has been reported that the oxidative polymerisation of NVCz in polymer matrix has a conductivity value of PCzPolyethyleneglycol copolymer which is ten times lower than PCz homopolymer (Ustamehmetoglu et al, 2001a, b).…”

Section: Introductionmentioning

confidence: 96%

Copolymers of carbazoles and methyl ethyl ketone formaldehyde resin

Ustamehmetoğlu

Akar

Kızılcan

et al. 2012

Pigment &Amp; Resin Technology

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Purpose -The purpose of this paper is to develop the soluble and processable conducting copolymers of carbazole (Cz), ethylcarbazole (ECz), N-vinylcarbazole (NVCz) by oxidatively polymerising carbazoles by ceric ammonium nitrate (CAN) in the presence of methyl ethyl ketone formaldehyde resin (MEKF-R); and to report the advantages of obtaining copolymer structure. Design/methodology/approach -A new class of soluble and conductive P(Cz/MEKF-R), P(NVCz/MEKF-R) and P(ECz/MEKF-R) copolymers were synthesised by the method of oxidative polymerisation with ceric ammonium nitrate. MEKF-R, CAN and carbazole monomers (Cz, NVCz and ECz) were dissolved in acetonitrile separately. Then, the CAN solution was added dropwise into the mixture of MEKF-R and Cz, NVCz or ECz solutions while stirring and a green powder was formed almost instantaneously. After one hour stirring at 258C, the powder was filtered, washed with acetonitrile and dried at room temperature. A green coloured product was obtained. The colourless insulator copolymer present in this product was separated by selectively dissolving with toluene. The insoluble green copolymer was filtered off and dried at room temperature under vacuum. The products were characterised by FTIR, DSC thermograms, 1H-NMR, four-point probe conductivity and atomic absorption measurements. Findings -The solubility and conductivity of the Cz/MEKF-R copolymer P(Cz/MEKF-R), the NVCz/MEKF-R copolymer P(NVCz/MEKF-R) and the ECz/ MEKF-R copolymer P(ECz/MEKF-R) were regulated by the ratios of (Cz, NVCz, ECz)/CAN/MEKF-R. By inclusion of the ketonic resin segments to the polycarbazole chains, thermally processable copolymers have been obtained with a melting point of about 808C. FT-IR results in different reaction time and the presence of metal in copolymers show together a complex between monomer-metal and resin. Research limitations/implications -This study focuses on obtaining conductive, soluble and processable copolymers. Since the ketonic resin is an insulator, in order to obtain both conductive and totally soluble polymer, successively regulating the ratios of (Cz, NVCz, ECz)/CAN/MEKF-R is necessary. Practical implications -This work provides technical information for the synthesis of conducting and totally soluble copolymer. Originality/value -The conductive P(Cz/MEKF-R), P(NVCz/MEKF-R) and P(ECz/MEKF-R) copolymers obtained by the method of oxidative polymerisation with ceric ammonium nitrate, which are totally soluble in DMF, could only be produced with this method and may increase the area of application of the carbazole polymers.

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Soluble polypyrrole copolymers

Cited by 34 publications

References 13 publications

Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution

Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution

Soluble fluorescent polymeric nanoparticles based on pyrrole derivatives: synthesis, characterization and their structure dependent sensing properties

Copolymers of carbazoles and methyl ethyl ketone formaldehyde resin

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Soluble polypyrrole copolymers

Cited by 34 publications

References 13 publications

Electrochemical synthesis of sulfonated polypyrrole in FSO3H/acetonitrile solution

Electrochemical synthesis of sulfonated polypyrrole in FSO3H/acetonitrile solution

Soluble fluorescent polymeric nanoparticles based on pyrrole derivatives: synthesis, characterization and their structure dependent sensing properties

Copolymers of carbazoles and methyl ethyl ketone formaldehyde resin

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Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution

Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution