Two different synthetic routes involving the reaction of dodecylamine or nicotinamide with crystalline lamellar vanadylphosphate

Machado, Margarete O.; Farias, Robson Fernandes de; Airoldi, Cláudio

doi:10.1016/j.jpcs.2004.04.008

Cited by 12 publications

(11 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The n-butylamine intercalate with the basal spacing of 13.76 Å was characterized using magic-angle spinning NMR and EPR [6]. Dodecylamine intercalate VOPO 4 ÁC 12 H 25 NH 2 Á H 2 O with the basal spacing of 28 Å was prepared by a solid state reaction [118]. The aliphatic amine molecules are oriented in a bilayer inside the host cavity tilted at an angle of 67°with respect to the inorganic lamella.…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…In the case of the VP matrix (Fig. 3a), there are literature reports that the crystallites of the material consist of irregulary stacked of rounded platelets with a length of around 10-20 mm and a thickness of less than 0.4 mm [15,20,21]. In contrast, the SEM images of the fresh material and of the samples submitted to thermal treatment at 200 8C, and 500 8C show how the morphology changes to a structure that consists of aggregates with a diameter in the range 5-20 mm.…”

Section: Resultsmentioning

confidence: 99%

n-Alkylamine-assisted preparation of a high surface area vanadyl phosphate/tetraethylorthosilicate nanocomposite

Ferreira

Zampronio

Oliveira

2013

Materials Research Bulletin

View full text Add to dashboard Cite

“…Hence, there is a lot of interest to obtain chemical or physical routes and procedures able to capture this compound from air or water. Vanadium pentoxide, V 2 O 5 , has been used as precursor material in the synthesis of vanadyl phosphate, VOPO 4 .2H 2 O [1][2][3][4][5][6][7][8][9][10][11][12]. This compound is one of the catalysts used in the oxidation of organic molecules [3].…”

Section: Introductionmentioning

confidence: 99%

“…In VOPO 4 .2H 2 O, a central vanadium atom is connected to six oxygen atoms, giving a regular octahedral structure [4][5][6][7][8][9][10][11][12]. The organization of the structures form an open lattice which can accommodate positive ions and/or organic molecules [1][2][3][4][5][6][7][8][9][10][11][12]. Because of the oxidative properties of VOPO 4 .2H 2 O, when neutral molecules enter the lamellar structure, they undergo oxidation by transferring one or more electrons to the host species.…”

Section: Introductionmentioning

confidence: 99%

“…Because of the oxidative properties of VOPO 4 .2H 2 O, when neutral molecules enter the lamellar structure, they undergo oxidation by transferring one or more electrons to the host species. The chemical species, V 5+ , is the promoter of such oxidative processes, especially for organic molecules [4][5][6][7][8][9][10][11][12]. The vanadyl phosphate is a lamellar compound and therefore able to accommodate in their nanostructure molecules of small dimensions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Untitled

2014

CIS

View full text Add to dashboard Cite

In the present work, cobalt-doped vanadyl phosphate is synthesized and use to prepare orthorhombic sulfur by reaction with hydrogen sulfide. The obtained X-ray florescence results for the cobalt doped matrix are as follows: 93.36 % V 2 O 5 ; 6.56% P 2 O 5 and 0,08% Co 2 O 3. The maximum H 2 S adsorption capacity was measure as 44.3 mg of H 2 S per gram of matrix. The interlayer distance (as measured by X-ray diffraction data) in the cobalt-doped matrix is 0.52 nm. It is verified by SEM images that orthorhombic sulfur crystals are formed.

show abstract

Two different synthetic routes involving the reaction of dodecylamine or nicotinamide with crystalline lamellar vanadylphosphate

Cited by 12 publications

References 18 publications

Intercalation chemistry of layered vanadyl phosphate: a review

Intercalation chemistry of layered vanadyl phosphate: a review

n-Alkylamine-assisted preparation of a high surface area vanadyl phosphate/tetraethylorthosilicate nanocomposite

Untitled

Contact Info

Product

Resources

About