Cesium salts of heteropoly acid immobilized mesoporous silica: An efficient catalyst for acylation of anisole

Parida, Kulamani; Rana, Surjyakanta; Mallick, Sujata; Rath, Dharitri

doi:10.1016/j.jcis.2010.06.025

Cited by 40 publications

(19 citation statements)

References 34 publications

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“…In case of the CsPOM/MCM, the acidity also decreased with substitution of Cs ion for protons [26]. However, the acidity of the CsPOM/MCM was higher than that of the unsupported CsPOM, as previously reported [27]. Compared between the HPOM/MCM and CsPOM/ MCM, the acidity of the CsPOM/MCM was lower but not much, because it possessed high surface acidity.…”

Section: Resultssupporting

confidence: 69%

Acidic and cesium salts of polyoxometalates with and without vanadium supported on MCM-41 as catalysts for oxidation of cyclohexane with H2O2

Trakarnpruk

Jatupisarnpong

2013

Appl Petrochem Res

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Acidic and cesium salts of polyoxometalate (POM) with and without vanadium supported on MCM-41 were synthesized and their catalytic activities were investigated in the oxidation of cyclohexane with H 2 O 2 under solvent-free condition. The products are cyclohexanol and cyclohexanone. The catalytic activity order is: CsV-POM/MCM [ HVPOM/MCM [ CsPOM/MCM * HPOM/ MCM [ CsVPOM [ CsPOM catalysts. High conversion and selectivity to cyclohexanone over the supported catalysts are due to redox property and high surface area. These heterogeneous catalysts can be reused.

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Section: Resultssupporting

confidence: 69%

Acidic and cesium salts of polyoxometalates with and without vanadium supported on MCM-41 as catalysts for oxidation of cyclohexane with H2O2

Trakarnpruk

Jatupisarnpong

2013

Appl Petrochem Res

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“…the extraframework. 44 Notably, the peak at 320 nm blue-shied to 302 nm for the NbPW-06 sample; this was likely not due to the quantum connement effect because the sizes of the NbPW-06 samples were not comparable with their Bohr atomic radii. 45 The TG analysis of the NbPW material is shown in Fig.…”

Section: Characterization Of the Niobium Phosphotungstatementioning

confidence: 96%

Niobium phosphotungstates: excellent solid acid catalysts for the dehydration of fructose to 5-hydroxymethylfurfural under mild conditions

et al. 2018

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“…The primary peak can be assigned to the oxygen metal charge transfer of tungstophosphate anion [PW 12 O 40 3À ]. 43,44 The next broad band at about 334 nm indicates the formation of some small clusters of bulk WO 3 , demonstrating the presence of octahedral coordination in the extra framework. 45 TPA/g-Al 2 O 3 showed a lower intensity band compared to that of the Zn x TPA/ g-Al 2 O 3 catalysts.…”

Section: Structural and Surface Morphological Characterizationmentioning

confidence: 98%

A novel microwave-assisted hydrothermal route for the synthesis of Zn_xTPA/γ-Al₂O₃for conversion of carbohydrates into 5-hydroxymethylfurfural

Parameswaram

Roy

2018

RSC Adv.

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carbohydrates are in high demand. Bivalent ion-exchanged microwave-synthesized Zn x TPA/g-Al 2 O 3 was employed for the direct conversion of carbohydrates into HMF. The as-synthesized samples were structurally characterized by FTIR and Raman spectroscopy, UV-Vis diffused reflectance spectroscopy, and X-ray diffraction. Thermal characterization was performed by TG-DTA. The surface morphology was analysed by FE-SEM, and surface area analysis was performed. The surface acidities of the assynthesized catalysts were elucidated by pyridine FTIR spectra and NH 3 -TPD. The catalytic performance was thoroughly studied as a function of Zn 2+ doping, reaction temperature, catalysts loading, and effect of solvents. Microwave-synthesized Zn 0.5 TPA/g-Al 2 O 3 exhibited excellent catalytic fructose dehydration, with 88% HMF yield at 120 C for 2 h. The surface Brønsted acidity was found to be crucial for optimum catalytic activity.Cite this: RSC Adv.

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Cesium salts of heteropoly acid immobilized mesoporous silica: An efficient catalyst for acylation of anisole

Cited by 40 publications

References 34 publications

Acidic and cesium salts of polyoxometalates with and without vanadium supported on MCM-41 as catalysts for oxidation of cyclohexane with H2O2

Acidic and cesium salts of polyoxometalates with and without vanadium supported on MCM-41 as catalysts for oxidation of cyclohexane with H2O2

Niobium phosphotungstates: excellent solid acid catalysts for the dehydration of fructose to 5-hydroxymethylfurfural under mild conditions

A novel microwave-assisted hydrothermal route for the synthesis of Zn_xTPA/γ-Al₂O₃for conversion of carbohydrates into 5-hydroxymethylfurfural

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Cesium salts of heteropoly acid immobilized mesoporous silica: An efficient catalyst for acylation of anisole

Cited by 40 publications

References 34 publications

Acidic and cesium salts of polyoxometalates with and without vanadium supported on MCM-41 as catalysts for oxidation of cyclohexane with H2O2

Acidic and cesium salts of polyoxometalates with and without vanadium supported on MCM-41 as catalysts for oxidation of cyclohexane with H2O2

Niobium phosphotungstates: excellent solid acid catalysts for the dehydration of fructose to 5-hydroxymethylfurfural under mild conditions

A novel microwave-assisted hydrothermal route for the synthesis of ZnxTPA/γ-Al2O3for conversion of carbohydrates into 5-hydroxymethylfurfural

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A novel microwave-assisted hydrothermal route for the synthesis of Zn_xTPA/γ-Al₂O₃for conversion of carbohydrates into 5-hydroxymethylfurfural