Chemical synthesis, characterization, and properties of conducting copolymers of imidazole and carbazole

Raj, V.; Madheswari, D.; Ali, M. Mubarak

doi:10.1002/app.32935

Cited by 6 publications

(7 citation statements)

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“…The difference in Imi content should be due to the lower solubility of polyimidazole in CHCl 3 as listed in Table I. A similar trend has been observed in the Imi/Cz copolymers 39…”

Section: Resultssupporting

confidence: 69%

Chemical synthesis, characterization, and properties of conducting copolymers of imidazole and pyridine

Raj

Madheswari²,

Ali

2011

J of Applied Polymer Sci

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A series of conducting copolymers were synthesized by chemical oxidative polymerization of imidazole (Imi) and pyridine (Py) in acetonitrile medium at ambient temperature. The yield, solubility, and conductivity of the copolymers were measured by changing the Imi/Py molar ratio from 0/100 to 100/0. The as-prepared Imi/Py conducting copolymers were characterized by UVVisible, FTIR, 1 H-NMR, DSC, TGA, and XRD. The results suggest that the resulting copolymers were more easily soluble in most of the organic solvents than in polyimidazole. The polymer obtained is a real copolymer containing imidazole and pyridine units, but the Imi content calculated on the basis of the proton NMR spectra is lower than feed Imi content. The thermostability of the Imi/Py copolymer increases with increasing Imi unit content. The copolymers show comparatively higher conductivity and higher thermal stability than the homopolymer polypyridine and are lower than those of polyimidazole.

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“…The difference in Imi content should be due to the lower solubility of polyimidazole in CHCl 3 as listed in Table I. A similar trend has been observed in the Imi/Cz copolymers 39…”

Section: Resultssupporting

confidence: 69%

Chemical synthesis, characterization, and properties of conducting copolymers of imidazole and pyridine

Raj

Madheswari²,

Ali

2011

J of Applied Polymer Sci

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“…The conductivity of bulk PIm was also measured as a pressed pellet (~3.8 x 10 -4 S cm -1 ) which is less than the reported value of 1.9 x 10 -3 S cm -1 . 31 The conductivity of the nanowire is subject to some uncertainty owing to variations in diameter. Nevertheless, the measured conductivity of the PIm/DNA nanowire is clearly substantially greater than the bulk conductivity.…”

Section: Measuring the Conductivity Of Single Nanowires Using C-afmmentioning

confidence: 99%

“…30 However, Raj and co-workers reported a conductivity of 1.9 x 10 -3 S cm -1 . 31 In this work, we describe the preparation and characterization of a novel hybrid metal/polymer nanowire comprising a polyimidazole core and a palladium shell. DNAtemplated polyimidazole nanowires (PIm/DNA) are formed first and subsequently used to nucleate the growth of a Pd coating on the polymer nanowire (Pd/PIm/DNA).…”

Section: Introductionmentioning

confidence: 99%

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Metal-conductive polymer hybrid nanostructures: preparation and electrical properties of palladium–polyimidazole nanowires

et al. 2016

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A simple, convenient method for the formation of hybrid metal/conductive polymer nanostructures is described. Polyimidazole (PIm) has been templated on λ-DNA via oxidative polymerisation of imidazole using FeCl3 to produce conductive PIm/DNA nanowires. The PIm/DNA nanowires were decorated with Pd (Pd/PIm/DNA) by electroless reduction of PdCl4(-2) with NaBH4 in the presence of PIm/DNA; the choice of imidazole was motivated by the potential Pd(II) binding site at the pyridinic N atom. The formation of PIm/DNA and the presence of metallic Pd on Pd/PIm/DNA nanowires were verified by FTIR, UV-vis and XPS spectroscopy techniques. AFM studies show that the nanowires have diameters in the range 5-45 nm with a slightly greater mean diameter (17.1 ± 0.75 nm) for the Pd-decorated nanowires than the PIm/DNA nanowires (14.5 ± 0.89 nm). After incubation for 24 h in the polymerisation solution, the PIm/DNA nanowires show a smooth, uniform morphology, which is retained after decoration with Pd. Using a combination of scanned conductance microscopy, conductive AFM and two-terminal measurements we show that both types of nanowire are conductive and that it is possible to discriminate different possible mechanisms of transport. The conductivity of the Pd/PIm/DNA nanowires, (0.1-1.4 S cm(-1)), is comparable to the PIm/DNA nanowires (0.37 ± 0.029 S cm(-1)). In addition, the conductance of Pd/PIm/DNA nanowires exhibits Arrhenius behaviour (E(a )= 0.43 ± 0.02 eV) as a function of temperature in contrast to simple Pd/DNA nanowires. These results indicate that although the Pd crystallites on Pd/PIm/DNA nanowires decorate the PIm polymer, the major current pathway is through the polymer rather than the Pd.

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“…To improve these properties, an electrochemical method was used to prepare copolymers with other monomers [40]. Electrochemical synthesis of copolymers is a good strategy in new electrically active materials that combine the properties of the constituent homopolymers [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

A novel synthesis of 3,6-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-9-tosyl- 9H-carbazole

Ateş¹,

Uludag²,

Karazehir³

et al. 2012

Analele Universitatii "Ovidius" Constanta - Seria Chimie

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A novel synthesis of 3,6-bis (2,3-dihydrothieno[3,4-b] (2,3-dihydrothieno [3,4-b][1,4]dioxin-5-yl)-9-tosyl-9H-carbazole (EDOTTsCz) was synthesized and electrochemically polymerized on glassy carbon electrode (GCE) in 0.1 M tetrabutyl ammonium tetrafluoroborate (NB 4 BF 4 )/acetonitrile (CH 3 CN). Alternating copolymer was formed by CV method. Modified polymer electrode was characterized by Fourier transform Infrared Spectroscopy-Attenuated Transmission Reflectance (FTIR-ATR), Cyclic voltammetry (CV), Scanning electron microscopy-Energy dispersive X-ray analysis (SEM-EDX), Atomic force microscope (AFM) and Electrochemical impedance spectroscopy (EIS). Capacitive behaviors of the modified GCE were defined via Nyquist, Bode-magnitude, Bode-phase and Capacitance plots. A modified copolymer electrode provides enhanced capacitance evaluation, which may results in performance in energy storage devices.

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Chemical synthesis, characterization, and properties of conducting copolymers of imidazole and carbazole

Cited by 6 publications

References 50 publications

Chemical synthesis, characterization, and properties of conducting copolymers of imidazole and pyridine

Chemical synthesis, characterization, and properties of conducting copolymers of imidazole and pyridine

Metal-conductive polymer hybrid nanostructures: preparation and electrical properties of palladium–polyimidazole nanowires

A novel synthesis of 3,6-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-9-tosyl- 9H-carbazole

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