Effects of inorganic acid in DBSA-PANI polymerization on transparent PANI-SiO2 hybrid conducting films

Li, Wei; Chen, Qi; Gu, Yin

doi:10.1016/j.jallcom.2010.04.094

Cited by 22 publications

(9 citation statements)

References 30 publications

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“…This indicates the existence of the alkyl chain in the emeraldine salt backbone. This peak confirms the presence of DBSA in the emeraldine salt system [33]. The band for HSO 4 appeared at 613 cm −1 which is responsible for the acid dopant in the chain of emeraldine salt.…”

Section: Ft-ir Spectroscopysupporting

confidence: 68%

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Gul

Shah

Bilal

2015

Journal of Chemistry

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A comprehensive study of thermally treated polyaniline in its emeraldine salt form is presented here. It offers an understanding of the thermal stability of the polymer. Emeraldine salt was prepared by a novel emulsion polymerization pathway using dodecylbenzene sulfonic acid and sulfuric acid together as dopants. The effect of temperature and heating rate on the degradation of this emeraldine salt was studied via thermogravimetric analysis. The thermally analyzed sample was collected at various temperatures, that is, 250, 490, 500, and 1000 ∘ C. The gradual changes in the structure of the emeraldine salt were followed through cyclic voltammetry, Fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy. Results demonstrate that emeraldine salt shows high thermal stability up to 500 ∘ C. This is much higher working temperature for the use of emeraldine salt in higher temperature applications. Further heat treatment seems to induce deprotonation in emeraldine salt. Cyclic voltammetry and ultraviolet-visible spectroscopy revealed that complete deprotonation takes place at 1000 ∘ C where it loses its electrical conductivity. It is interesting to note that after the elimination of the dopants, the basic backbone of emeraldine salt was not destroyed. The results reveal that the dopants employed have a stability effect on the skeleton of emeraldine salt.

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Section: Ft-ir Spectroscopysupporting

confidence: 68%

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Gul

Shah

Bilal

2015

Journal of Chemistry

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“…As shown in Fig. 3 6 ] and gave the following assignments to the peaks [32]. The peaks at 1571 and 1465 cm −1 are attributed to C-N stretching mode; the peak at 1387 cm −1 is attributed to C-C stretch mode, and the peak at 857 cm −1 is assigned to P-F asymmetric stretch.…”

Section: Ft-ir Spectramentioning

confidence: 91%

“…Among various conducting polymers, polyaniline (PANI) is one of the most promising conducting polymers because of its unique electrical, optical, and optoelectric properties, as well as its ease of preparation and excellent environmental stability [5][6][7]. Being a magnetic materials, cobalt ferrite (CoFe 2 O 4 ) is one of the most important spinel ferrites with a Curie temperature around 793 K. The material shows a relatively large magnetic hysteresis which distinguishes it from other spinel ferrites.…”

Section: Introductionmentioning

confidence: 99%

Influence of imidazolium-based ionic liquids on the performance of polyaniline–CoFe2O4 nanocomposites

Leng

Wei

Liu

et al. 2011

Journal of Alloys and Compounds

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“…Recently, a new class of multifunctional materials with unique combination of organic chromospheres in an inorganic oxide glass network has been developed. 5,6 For that purpose solÀgel process o®ers the best method for incorporation of organic dyes, porphyrene 7 into inorganic porous gel matrices. To date, the study regarding porphyrenes in solid matrices especially in glassy matrix is very much limited due to the lack of suitable synthetic procedures.…”

Section: Introductionmentioning

confidence: 99%

High Dielectric Constant Composite Based on Chlorophyll a Entrapped Nanoporous Silica Gel

et al. 2012

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Chlorophyll a (naturally occurring Mg porphyrene) has been entrapped in nano/porous silica gel using sol–gel method at room temperature, producing a stable composite. HRTEM observation reveals regular nanoscale [around 15–20 nm diameter] distribution of aggregated polycrystalline chlorophyll a within porous silica matrix. UV-vis study also corroborates the presence of various aggregated chlorophyll a species within the system. Low field measurement shows almost 400 times enhancement of dielectric constant (1700) with incorporation of only 0.125 mg/ml of chlorophyll and the loss is 0.5 at room temperature at 100 Hz. The dielectric constant of the composite reaches 2500 as chlorophyll concentration becomes 1 mg/ml. Observed strong space charge response to the external field and strong frequency dispersion of the dielectric properties of the composite can be attributed to the long-range electron delocalization [nomadic polarization] in chlorophyll a aggregates. The electric modulus (M*) formalism used in this study enabled us to distinguish and separate various relaxation processes. It is found that with increasing chlorophyll concentration D.C. relaxation time decreases exponentially at room temperature. It is shown that observed relaxations do not perfectly follow the Debye response in high frequency region due to heterogeneous distribution of chlorophyll aggregates. The low values of room temperature activation energy calculated from Arrhenius plot reveal that polaronic hopping phenomena is absent at grain-interfacial region due to low thermal energy.

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Effects of inorganic acid in DBSA-PANI polymerization on transparent PANI-SiO2 hybrid conducting films

Cited by 22 publications

References 30 publications

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Effect of High Temperature on the Electrochemical and Optical Properties of Emeraldine Salt Doped with DBSA and Sulfuric Acid

Influence of imidazolium-based ionic liquids on the performance of polyaniline–CoFe2O4 nanocomposites

High Dielectric Constant Composite Based on Chlorophyll a Entrapped Nanoporous Silica Gel

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