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Drelinkiewicz, A.; Hasik, Magdalena; Kloc, M.

doi:10.1023/a:1019078718474

Cited by 94 publications

(42 citation statements)

References 10 publications

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“…For example, polyaniline-metal nanoparticle composites exhibit enhanced sensing and catalytic properties, compared to pure polyaniline. [14][15][16][17][18][19] Apart from the properties mentioned above, conducting polymers are useful as magneto/ electrorheological ͑ER͒ materials/fluids. [20][21][22][23] ER fluids is a class of materials whose rheological characteristics are controllable through the application of an electric field.…”

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confidence: 99%

Organically Soluble Bifunctional Polyaniline–Magnetite Composites for Sensing and Supercapacitor Applications

Radhakrishnan

Prakash

Rao

et al. 2009

Electrochem. Solid-State Lett.

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Conducting polymers ͑CPs͒ now own a special status in the field of electroactive materials, especially after the pioneering and noble prize winning work by Shirakawa et al.1 A great deal of progress has been made on these synthetic metals in terms of their synthesis, processability, and device applications.2-4 Particular attention on polyaniline ͑PAni͒ has been given due to its environmental stability, thin-film-forming property with tunable conductivity and commercial viability. Polyanilines have been studied extensively due to their applications to practical devices for energy storage, electrochemical sensors, electrochromic devices, electromagnetic interference shielding, and corrosion protection.3-10 Application of the CPs in energy storage devices is also well known, 11 and recent studies 12 in this area gave impetus to fundamental and applied research on CPbased materials. Recent literature 13 identified the polyaniline composite materials as potential electrochemical sensors for various biomolecules.Applications of conducting polymers are broadened by compositing with other inorganic materials. For example, polyaniline-metal nanoparticle composites exhibit enhanced sensing and catalytic properties, compared to pure polyaniline. [14][15][16][17][18][19] Apart from the properties mentioned above, conducting polymers are useful as magneto/ electrorheological ͑ER͒ materials/fluids. 20-23 ER fluids is a class of materials whose rheological characteristics are controllable through the application of an electric field. ER fluids are usually made of particle suspensions with a large dielectric constant mismatch between the particles and the fluid. Because of the controllable rheological properties, ER fluids can potentially be used as a smart material for active devices, which transform electric energy to mechanical energy. Polyaniline can change its property from a conducting to an insulating state using simple protonic acid treatment. This allows for a change in dielectric constant and conductivity of particles while keeping all other particle properties the same.In the present communication, we report the synthesis of organically soluble bifunctional polyaniline-magnetite composites, which can sense dopamine and also act as supercapacitor electrode material. The results are presented and discussed. ExperimentalMaterials and methods.-Analytical grade aniline monomer was purchased from Merck, India. Dodecylbenzene sulfonicacid ͑70 wt % solution in 2-propanol͒ ͑DBSA͒ was purchased from Aldrich Chemical Company. Other characterization methods are similar to our earlier report. 12Synthesis of PAni-DBSA-Fe 3 O 4 nanocomposites.-Fe 3 O 4 magnetic particles were prepared by precipitation-oxidation method according to a known procedure, 24 according to which the size of the magnetite particles are in the range of 20-30 nm. PAni-magnetite composites were prepared by an in situ polymerization of aniline ͑1 mL͒ in DBSA ͑5 mL in 100 mL water͒ solution containing a specific amount of Fe 3 O 4 magnetic particles according to...

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confidence: 99%

Organically Soluble Bifunctional Polyaniline–Magnetite Composites for Sensing and Supercapacitor Applications

Radhakrishnan

Prakash

Rao

et al. 2009

Electrochem. Solid-State Lett.

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“…Figure 3). [16,23] The remaining 1 = 4 of N states measured at a BE of 398.7 eV could not unambiguously be attributed to an imine [ = N-] (BE = 398.0 eV) [17,24] or amine [-NH-] nitrogen (BE = 399.5 eV). [17,24] Taking into account both the Pt 4f and N 1s spectra, it can be clearly concluded from the XPS analysis of the catalyst Pt/PANI-3 that its surface exclusively consists of highly oxidized platinum which is deposited on the nearly fully oxidized form of PANI, i.e., pernigraniline (Scheme 3).…”

Section: In Depth Characterization By Xps and Exafs/ Xanes X-ray Photmentioning

confidence: 99%

“…[14] A broader field where noble metal-PANI systems are used is electrocatalysis, [15] whereas they are only rarely used as hydrogenation catalysts for unsaturated compounds. An exception is the work by Drelinkiewicz et al about ethylanthraquinone (with Pd/PANI) [16] and Sobczak et al about hexyne (with Pt/PANI and Pd/PANI) hydrogenation. [17] The above discussed structures of PANI should, by subtle combination with metal precursor and synthetic route, offer the possibility of a specific design of novel catalysts which could now control the selectivity in hydrogenations of a,b-unsaturated aldehydes.…”

Section: Introductionmentioning

confidence: 99%

Carbon‐Carbon Double Bond versus Carbonyl Group Hydrogenation: Controlling the Intramolecular Selectivity with Polyaniline‐Supported Platinum Catalysts

et al. 2008

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The use of polyaniline (PANI) as catalyst support for heterogeneous catalysts and their application in chemical catalysis is hitherto rather poorly known. We report the successful synthesis of highly dispersed PANI-supported platinum catalysts (particle sizes between 1.7 and 3.7 nm as revealed by transmission electron microscopy, TEM) choosing two different approaches, namely (i) deposition-precipitation of H 2 PtCl 6 onto polyaniline, suspended in basic medium (DP method) and, (ii) immobilization of a preformed nanoscale platinum colloid on polyaniline (sol-method). The PANI-supported platinum catalysts were applied in the selective hydrogenation of the a,b-unsaturated aldehyde citral. In order to benchmark their catalytic performance, citral hydrogenation was also carried out by using platinum supported on the classical support materials silica (SiO 2 ), alumina (Al 2 O 3 ), active carbon and graphite. The relations of the structural characteristics and surface state of the catalysts with respect to their hydrogenation properties have been probed by EXAFS and XPS. It is found that the DP method yields chemically prepared PtO 2 on polyaniline and, thus, produces a highly dispersed and immobilized Adams catalyst (in the b-PtO 2 form) which is able to efficiently hydrogenate the conjugated C=C bond of citral (selectivity to citronellal = 87%), whereas reduction of the C=O group occurs with polyanilinesupported platinum (selectivity to geraniol/nerol = 78%) prepared via the sol-method. The complete reversal of the selectivity between the preferred hydrogenation of the conjugated C=C or C=O group is not only particularly useful for the selective hydrogenation of a,b-unsaturated aldehydes but also unveils the great potential of conducting polymer-supported precious metals in the field of hitherto barely investigated chemical catalysis.

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“…The complexation behavior of PANI was originally investigated for the importance of metal ion sensing in biology, medicine, and environmental fields by Hirao et al [7][8][9] PANI-metal nanoparticle composites also show enhanced sensing and catalytic capabilities, as compared to those of pure PANI. 10,11 Although non-nanoporous PANI has been employed for metal complexation, a highly nanoporous PANI system has not been used for transition metal complexation. Recently, we have developed a general chemical route to produce PANI nanofibers using a self-stabilized dispersion polymerization (SSDP) method that occurs at an aqueous/organic interface at low temperature.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of tailor‐made nanoporous polyaniline derived with PVA/alkaline metal system for metal complexation

Lee

Choi

Jeong

et al. 2011

J of Applied Polymer Sci

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Nanoporous polyanilines (PANIs) have attracted attention due to well-defined molecular structures and chemical versatility, which also complicate the mechanisms of interaction between metal ions and PANI. To further understand the complexation with metal ions, tailor-made nanoporous PANIs were synthesized with self-stabilized dispersion polymerization (SSDP) using the poly(vinyl alcohol) (PVA) and various alkaline metals for suitable target metal complexation. The effective complexation results for the removal of Cr ions were obtained by the nanoporous PANI derived from a PVA/Li system. The synthesized tailor-made PANI-emeraldine base (EB) was easily oxidized by a Cr(VI) oxidant resulting in an pernigraniline form with a rigid polymer template and effective metal ion binding sites, and then the reduced form of Cr(III) can be complexed with the resulting PANI.

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Cited by 94 publications

References 10 publications

Organically Soluble Bifunctional Polyaniline–Magnetite Composites for Sensing and Supercapacitor Applications

Organically Soluble Bifunctional Polyaniline–Magnetite Composites for Sensing and Supercapacitor Applications

Carbon‐Carbon Double Bond versus Carbonyl Group Hydrogenation: Controlling the Intramolecular Selectivity with Polyaniline‐Supported Platinum Catalysts

Synthesis of tailor‐made nanoporous polyaniline derived with PVA/alkaline metal system for metal complexation

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