Synthesis and characterization of halo-substituted polyanilines/VOPO4 nanocomposites

Bissessur, Rabin; MacDonald, Jillian

doi:10.1016/j.matchemphys.2007.05.045

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…Vanadium oxides continue to attract considerable attention because of their ability to act as catalysts, − as cathode materials in batteries, − as intercalation hosts, − as ion-exchange materials, , and as magnetic materials − and for their structural versatility. − These diverse attributes originate from the various coordination environments and oxidation states found for vanadium in complex oxides. In vanadates, vanadium is typically observed in a tetrahedral, a square-planar, or an octahedral coordination environment and is found in oxidation states of 3+, 4+, or 5+.…”

Section: Introductionmentioning

confidence: 99%

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs₂V₃O₈: A Structure–Property Study

et al. 2013

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Cesium vanadate, Cs2V3O8, a member of the fresnoite-type structure, was synthesized via a hydrothermal route and structurally characterized by single-crystal X-ray diffraction. Cs2V3O8 crystallizes in a noncentrosymmetric polar space group, P4bm, with crystal data of a = 8.9448(4) Å, c = 6.0032(3) Å, V = 480.31(4) Å(3), and Z = 2. The material exhibits a two-dimensional layered crystal structure consisting of corner-shared V(5+)O4 and V(4+)O5 polyhedra. The layers are separated by the cesium cations. The alignment of the individual polyhedra results in a macroscopic polarity for Cs2V3O8. Frequency-dependent polarization measurements indicate that the material is not ferroelectric. A pyroelectric coefficient of -2.0 μC m(-2) K(-1) was obtained from pyroelectric measurements taken as a function of the temperature. The magnetic susceptibility data were measured as a function of the temperature and yielded an effective magnetic moment of 1.78 μB for the V(4+) cation. Short-range magnetic ordering was observed around 7 K. The susceptibility data were fit to the Heisenberg square-lattice model supporting that the short-range magnetic interactions are antiferromagnetic and two-dimensional. IR and thermal properties were also characterized.

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Section: Introductionmentioning

confidence: 99%

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs₂V₃O₈: A Structure–Property Study

et al. 2013

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“…The typical methodology for the exfoliation of layered materials consists, in a first step, of the intercalation between the individual layers of an organic polymer. The incorporation of a silica and titanium oxide network prepared by sol–gel transition from the hydrolysis of alkoxysilanes has also been reported. , A variety of layered inorganic materials have been used, such as phosphates and phosphonates, layered metal oxides, layered double hydroxides, layered polysilicates, and clay minerals . Among clay minerals, the smectite family has been widely studied, ,− but the number of reports of a chemical exfoliation of kaolinite is scarce. , The exfoliation of kaolinite to form nanotubes or nanoscrolls was also recently reported .…”

Section: Introductionmentioning

confidence: 99%

Single Kaolinite Nanometer Layers Prepared by an In Situ Polymerization–Exfoliation Process in the Presence of Ionic Liquids

et al. 2011

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A simple chemical route for the exfoliation of kaolinite in the presence of polymerizable ionic liquids and the resulting obtainment of exfoliated nanocomposites is reported. The exfoliation was achieved using three different ionic liquids structurally bearing a vinyl group: 1-methyl-3-(4-vinylbenzyl)imidazolium chloride salt (IL_1), 1-methyl-1-(4-vinylbenzyl)pyrrolidinium chloride (IL_2), and 1-methyl-3-vinyl imidazolium iodide (IL_3) and a urea-kaolinite intercalate as precursor. The reaction was done in one step by an in situ polymerization-exfoliation process. (13)C CP/MAS NMR spectra confirmed the spontaneous polymerization of the ionic liquid during the exfoliation process to afford atactic polystyrene derivatives in the case of IL_1 and IL_2. The amount of organic material in the exfoliated nanocomposite was close to 30% as shown by thermal gravimetric analysis. This amount is small in comparison to the amount obtained when the exfoliation was done using sodium polyacrylate (Letaief and Detellier, Langmuir2009, 25, 10975). XRD as well as SEM analysis confirmed a total exfoliation of the kaolinite when the reaction was done using urea kaolinite, whereas a microcomposite, made predominantly of kaolinite platelet aggregates dispersed in the polymeric matrix, was formed when dimethylsulfoxide kaolinite was used as the precursor.

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“…In addition, there is a water molecule bound to each of the vanadium centers, with interlamellar water hydrogen bonded to the coordinated water [49]. VOPO 4 .2H 2 O is capable of undergoing in situ intercalation/polymerization with molecules such as aniline [50,51], substituted anilines [52,53,54], and pyrroles [55]. Evidence of intercalation was obtained from powder X-ray diffraction.…”

Section: Vopo 4 2h 2 Omentioning

confidence: 99%

Inorganic‐Based Nanocomposites of Conductive Polymers

Bissessur

2010

Nanostructured Conductive Polymers

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Synthesis and characterization of halo-substituted polyanilines/VOPO4 nanocomposites

Cited by 13 publications

References 19 publications

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs₂V₃O₈: A Structure–Property Study

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs₂V₃O₈: A Structure–Property Study

Single Kaolinite Nanometer Layers Prepared by an In Situ Polymerization–Exfoliation Process in the Presence of Ionic Liquids

Inorganic‐Based Nanocomposites of Conductive Polymers

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Synthesis and characterization of halo-substituted polyanilines/VOPO4 nanocomposites

Cited by 13 publications

References 19 publications

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs2V3O8: A Structure–Property Study

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs2V3O8: A Structure–Property Study

Single Kaolinite Nanometer Layers Prepared by an In Situ Polymerization–Exfoliation Process in the Presence of Ionic Liquids

Inorganic‐Based Nanocomposites of Conductive Polymers

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Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs₂V₃O₈: A Structure–Property Study

Crystal Growth, Structure, Polarization, and Magnetic Properties of Cesium Vanadate, Cs₂V₃O₈: A Structure–Property Study