Novel alkyl substituted polyanilines/VOPO4 nanocomposites

Bissessur, Rabin; MacDonald, Jillian

doi:10.1016/j.solidstatesciences.2006.02.026

Cited by 13 publications

(6 citation statements)

References 16 publications

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“…The total weight loss for PANI at 800 8C is 15 %. Similar results were obtained by other authors [27,28]. The TGA curves of PDMA show loss of moisture in the first step of decomposition, the removal of dopant anions and decomposition of the materials in the subsequent steps.…”

Section: Thermogravimetric Analysis (Tga)supporting

confidence: 90%

Synthesis and Characterization of Novel Nanophase Hexagonal Poly(2,5‐dimethoxyaniline)

et al. 2008

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Novel nanophase hexagonal structured polyaniline (PANI) and poly(2,5-dimethoxyanilines) (PDMA) were synthesized by oxidative polymerization involving the respective anilines and a mixture of ferric chloride and ammonium persulfate. The morphological, spectral and electrochemical characteristics of the polymers were determined from the results of SEM, FTIR, UV-vis, TGA and cyclic voltammetry experiments. The hexagonal PANI and PDMA nanorods (15 -200 nm diameter) exhibited very good thermal stabilities, losing only 10% of their weight on heating to 400 8C. Electrochemical data indicated a pernigraniline state of the polymers with formal potential, E8', values of 394 AE 6 mV and 400 AE 1 mV, for PANI (conductance, C ¼ 0.37 Â 10 À3 S) and PDMA (conductance, C ¼ 2.02 Â 10 À3 S), respectively. The pernigraniline state was confirmed by sharp FTIR pernigraniline quinoidic peaks (PANI: 1414 cm À1 ; PDMA: 1157 cm À1), and UV-vis absorption maxima at 340 -370 nm (PANI) and 450 -650 nm (PDMA) which are characteristic of charge transfer excitons of the quinoid structures of pernigraniline.

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Section: Thermogravimetric Analysis (Tga)supporting

confidence: 90%

Synthesis and Characterization of Novel Nanophase Hexagonal Poly(2,5‐dimethoxyaniline)

et al. 2008

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“…Intercalation compounds of N-methylaniline, 2-ethylaniline and 2-propylaniline containing both monomer and polymer species were prepared [127]. An influence of synthesis condition on intercalation of o-methoxyaniline and o-methylaniline was observed [128].…”

Section: Intercalation Of Aminesmentioning

confidence: 99%

Intercalation chemistry of layered vanadyl phosphate: a review

Beneš

Melánová

Svoboda

et al. 2012

J Incl Phenom Macrocycl Chem

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The intercalation chemistry of layered a I modification of vanadyl phosphate and vanadyl phosphate dihydrate is reviewed. The focus is on neutral molecular guests and on metal cations used as guest species. The basic condition for the ability of the neutral molecules to be intercalated into vanadyl phosphate is a presence of an electron donor atom in them. The most commonly used guest compounds are those containing oxygen, nitrogen or sulfur as electron donor atoms. Regarding the molecules containing oxygen, various compounds were used as molecular guests starting from water to alcohols, ethers, aldehydes, ketones, carboxylic acids, lactones, and esters. An arrangement of the guest molecules in the interlayer space is discussed in connection with the data obtained by powder X-ray diffraction, thermogravimetry, IR and Raman spectroscopies, and solid-state NMR. In some cases, the local structure was suggested on the basis of quantum chemical calculations. Besides of those O-donor guests, also N-donor guests such as amines, nitriles and nitrogenous heterocycles and S-donor guests such as tetrathiafulvalene were intercalated into VOPO 4 . Also intercalates of complexes like ferrocene were prepared. Intercalation of cations is accompanied by a reduction of vanadium(V) to vanadium(IV). In this kind of intercalation reactions, an iodide of the intercalated cation is often used as it serves both as a mild reduction agent and as a source of the intercalated species. Intercalates of alkali metals, hydronium and ammonium were prepared and characterized. In the case of lithium and sodium intercalates, a staging phenomenon was observed. These redox intercalated vanadyl phosphates undergo ion exchange reactions which are discussed from the point of the nature of cations involved in the exchange. Vanadyl phosphates in which a part of vanadium atom is replaced by other metals are also briefly reviewed.

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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%