Synthesis and electrochemical properties of mixed ionic and electronic modified polycarbazole

Tran‐Van, François; Henri, Thierry; Chevrot, C.

doi:10.1016/s0013-4686(02)00171-8

Cited by 77 publications

(56 citation statements)

References 54 publications

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“…The current efficiency of carbazole polymerization was determined to be only 75%. The PCZ film was transparent and colorless in the dedoped state while it was dark green in the doped form, similarly to the literature [28,30,35]. The dedoped PCZ films were only partly soluble even in strong polar solvents such as DMSO, THF and acetone.…”

Section: Structural Characterizationssupporting

confidence: 84%

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Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Nie

Zhang

et al. 2006

J Appl Electrochem

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High-quality polycarbazole (PCZ) films were synthesized electrochemically by direct oxidation of carbazole in boron trifluoride diethyl etherate (BFEE) containing vol. 20% ethyl ether (EE). The oxidation potential of carbazole in this medium was measured to be only 0.90 V vs. SCE, which was lower than that determined in acetonitrile containing 0.1 mol l )1 Bu 4 NBF 4 (1.35 V vs. SCE). PCZ films obtained from this medium showed better electrochemical behavior, better thermal stability with conductivity of 7.5 Â 10 )3 S cm )1 being one order of magnitude higher than those reported previously, indicating that BFEE/EE was a better medium than acetonitrile for the electrosyntheses of PCZ films. As-formed PCZ films can be partly dissolved in acetone, acetonitrile and tetrahydrofuran. Spectral analysis provided evidence for the existence of the conjugated structure of the PCZ chain. Fluorescent spectra indicate that electrosynthesized PCZ is an ideal blue light emitter.

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Section: Structural Characterizationssupporting

confidence: 84%

“…Many statements of the structure and polymerization mechanism of PCZ are translated from polypyrrole or polyindole studies. Therefore, extensive work has been devoted to the study of PCZ in the past several years [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Nie

Zhang

et al. 2006

J Appl Electrochem

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“…The electronic band gap (Eg), defined as the onset for the p)p* interband transition is close to 3.2 eV [51], in agreement with literature. When a potential higher than 0.55 V was applied, two absorption bands appear at 395 nm and around 800 nm which have been attributed to the radical cation and dication of carbazole, respectively [52]. The coated film was reduced to an undoped state by applying a negative voltage at )1.2 V. At )1.2 V the polymer is colourless (fully reduced form), but the color gradually changes to green by application of 0.2 V. At a higher potential it turns deep green.…”

Section: Ftir Reflectance Spectrum Of Electrocoated Of Polycarbazole mentioning

confidence: 99%

Electrolyte and solvent effects of electrocoated polycarbazole thin films on carbon fiber microelectrodes

2006

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Carbazole was electrochemically synthesized on carbon fiber microelectrodes (CFMEs) in different electrolyte and solvent media. The characterization of polycarbazole thin films formed on micron sized carbon fiber electrodes was performed by electrochemical methods (i.e., cyclic voltammetric measurements, solid state conductivity measurements (four point probe), spectrophotometric methods (ultraviolet/visible spectroscopy (UV-vis), ex situ spectroelectrochemistry, fourier transform infrared reflectance spectroscopy (FTIR-ATR)) and scanning electron microscopy (SEM). The best electrolyte and solvent in regards to yield, conductivity and charge for the electrografting was sodium perchlorate in acetonitrile, whose conductivity was 3.60 mS cm )1 , had a yield of 89% and had a charge of 5.50C. The effects of scan rate, feed ratio, supporting electrolyte and solvent type on the electropolymerization are discussed.

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“…The electrochemical technique gives the opportunity of analytical investigations during the process of polymer formation and comparison of different polymers deposited on the same electrode under identical conditions. Among conducting polymers, polycarbazole (PCz) has received considerable attention due to its high holetransporting mobility of the charge carriers, and excellent electro-active and photo-active properties [14], environmental stability, photoconductivity, and electrical and electrochromic properties [15][16][17][18][19][20][21][22]. It is well-known that copolymerization is one of the most efficient approaches to modify the properties of CPs, which can produce copolymers with properties being intermediate between the individual polymers.…”

Section: Introductionmentioning

confidence: 99%

Copolymer formation of 9-(2-(benzyloxy)ethyl)-9H-carbazole and 1-tosyl-1H-pyrrole coated on glassy carbon electrode and electrochemical impedance spectroscopy

Ateş

Uludag

Karazehir

2012

J Solid State Electrochem

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In this work, 9-(2-(benzyloxy)ethyl)-9H-carbazole (BzOCz) and 1-tosyl-1H-pyrrole (TsP) monomers were chemically synthesized and characterized by Fourier transform infrared reflectance (FTIR) and proton nuclear magnetic resonance ( 1 H-NMR) spectroscopy. BzOCz and TsP were electrocoated on glassy carbon electrode (GCE) in various molar fractions (X TsP 00.5, 0.83, 0.91, and 0.98) in 0.1 M sodium perchlorate/acetonitrile. The detailed characterization of poly (BzOCz-co-TsP) was studied by cyclic voltammetry, FTIRattenuated total reflection spectroscopy and electrochemical impedance spectroscopy (EIS). The effects of different molar fractions during the preparation of modified electrodes were studied by EIS technique. The AC impedance technique was used to determine the capacitive behaviors of modified GCE via Nyquist, Bode magnitude, and Bode phase plots. The highest low frequency capacitance value was obtained as C LF 023.94 μF cm −2 for X TsP 00.98. Therefore, synthesized copolymer has more capacitive behavior than its homopolymers, such as C LF 07.5 μF cm −2 for poly(BzOCz) and C LF 0 9.44 μF cm −2 for poly(TsP). In order to interpret the AC impedance spectra, R(Q(RW)) electrical equivalent circuit was employed with linear Kramers-Kronig test. A mechanism for electropolymerization has been proposed for copolymer formation.

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Synthesis and electrochemical properties of mixed ionic and electronic modified polycarbazole

Cited by 77 publications

References 54 publications

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Electrolyte and solvent effects of electrocoated polycarbazole thin films on carbon fiber microelectrodes

Copolymer formation of 9-(2-(benzyloxy)ethyl)-9H-carbazole and 1-tosyl-1H-pyrrole coated on glassy carbon electrode and electrochemical impedance spectroscopy

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