Methyltrioxorhenium-catalyzed epoxidation of olefins with hydrogen peroxide as an oxidant and pyridine N-oxide ionic liquids as additives

Zhang, Yuecheng; Li, Zhaozhao; Cao, Xiaohui; Zhao, Jiquan

doi:10.1016/j.molcata.2012.09.017

Cited by 9 publications

(3 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17 The phase and structure of [PyPS] 4 PW 11 VO 40 is further studied by using powder X-ray diffraction (XRD) in Fig. 1B.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Conductive Performance of Temperature Control-type Ionic Liquid Based on Keggin Polyoxometalate

Li¹,

Wu²,

Tong³

et al. 2014

ECS Electrochemistry Letters

View full text Add to dashboard Cite

A temperature control-type ionic liquid based on ternary Keggin polyoxometalate, [PyPS] 4 PW 11 VO 40 , has been synthesized and characterized. It is solid state at room tempareture and it shows a phase transformation below 100 • C. The results indicate that this compound possesses layered type structure. Its conductive performance is investigated. Its conductivity is as high as 6.20 × 10 −3 S · cm −1 at 120 • C.Heteropoly acids (HPAs) and their polyoxometalate salts (POMs), a fascinating class of inorganic metal-oxygen cluster compounds, have been known for almost two centuries. A large amount of basic researches have emerged in various areas ranging from structural diversity to applications including catalysis, medicine, biology and materials science because of their novel chemical, structural and electronic properties. [1][2][3][4] Lots of the researches in materials science have been reported that these compounds have good conductivity either in solution or as solid. 5-7 Unfortunately, HPAs suffer from high sensitivity to atmospheric moisture, diffusional problems, relatively weak thermal stability and continuous leakage during cell operation. In order to broaden their application, the design and synthesis of HPA derivatives are of great interest. Among these HPA derivatives, a new family of polyoxometalate-based ionic liquids (POM-ILs) that are based on ionic liquids and HPAs have been explored. Ionic liquids (ILs) have attracted special interests owing to their negligible volatility, excellent thermal stability, remarkable solubility, electrical conductivity and the variety of structures available. 8,9 Rickert et al. have synthesized and characterized a series of POM-ILs based on polyoxometalates and ionic liquids. 10 Giannelis has reported a new kind of POM-IL prepared by PW 12 O 40 3− anion and bulky PEG-containing quaternary ammonium cation. This HPA derivative has higher conductivity than that of its solid analog, which has been found promising for electrolytes. 11 A variety of these POM-ILs constructed from classical Keggin-, Wells-Dawson-and Anderson-type heteropolyanions. 12,13 However, most of the anions they used are binary HPAs, the application of vanadium-substituted ternary HPAs as anions is scarce. So we chose monovanadium-substituted ternary HPA (H 4 PW 11 VO 40 ) and 1-(3-sulfonic group) propyl-3-methyl pyridine (PyPS) to synthesize a new POM-IL. In this paper, we have studied the conductive performance of this POM-IL. ExperimentalSyntheses of POM-IL.-PyPS was synthesized according to the literature. 14 H 4 PW 11 VO 40 was synthesized according to the procedure described in our previous report. 15 The presynthesized PyPS and HPA (H 4 PW 11 VO 40 ), was taken in 4:1 mole ratio to give one mole of [PyPS] 4 PW 11 VO 40 . PyPS was added to an ethanol solution of HPA (0.2 g · mL −1 ), and then the mixture was stirred for 12 h at room temperature. The orange-yellow product was washed with ethanol and dried in vacuum at room temperature to give the final one.Instruments and reagents.-FTIR spectrum w...

show abstract

“…17 The phase and structure of [PyPS] 4 PW 11 VO 40 is further studied by using powder X-ray diffraction (XRD) in Fig. 1B.…”

Section: Methodsmentioning

confidence: 99%

“…The S = O stretching vibrations are at 1227 and 1170 cm −1 , which verifies the presence of sulfonic groups. 17 The phase and structure of [PyPS] 4 PW 11 VO 40 is further studied by using powder X-ray diffraction (XRD) in Fig. 1B.…”

mentioning

confidence: 99%

Synthesis and Conductive Performance of Temperature Control-type Ionic Liquid Based on Keggin Polyoxometalate

Li¹,

Wu²,

Tong³

et al. 2014

ECS Electrochemistry Letters

View full text Add to dashboard Cite

show abstract

“…[137][138][139] The ionic liquids were used as additives in the MTO catalyzed epoxidation and it was found that they performed well in suppressing the epoxide ring-opening reaction. 140 4 ] using H 2 O 2 as an oxidant, was reported. Epoxidation of various alkenes was investigated in the presence and absence of acetic acid.…”

Section: Epoxidationmentioning

confidence: 99%

Synthetic utility of metal catalyzed hydrogen peroxide oxidation of C-H, C-C and C=C bonds in alkanes, arenes and alkenes: Recent advances

Wójtowicz‐Młochowska¹

2016

Arkivoc

View full text Add to dashboard Cite

This review presents the current state of the art of homogenic and heterogenic oxygen transfer processes using hydrogen peroxide as oxygen source and compounds and complexes of tranisition metals, Fe, V, Cu, Mn, Rh, Mo, Ti, W, Pd, Os, Zr, Cr, Nb, Co, as the catalysts. Based on the reactions of C-H, C-C and C=C bonds in alkanes, arenes and alkenes various mechanisms of the oxygen-transfer processes are discussed and new methodologies for synthesis of alcohols, phenols, aldehydes, ketones, epoxides and carboxylic acids are indicated.

show abstract

High Catalytic Synergism between the Components of the Rhenium Complex@Silver Hybrid Material in Alkene Epoxidations

et al. 2014

View full text Add to dashboard Cite

The immobilization of a water-soluble rhenium complex in metallic silver matrices has resulted in a highly efficient catalyst for epoxidation, which has better epoxidation catalytic activity than the individual components. This unprecedented synergism could be obtained only by using the novel immobilization methodology, and not by using the standard adsorption process. The composite catalyst has been fully characterized (by using XRD, TEM, SEM, energy-dispersive X-ray spectroscopy, and atomic X-ray mapping), and the synergism has originated as a result of the proximity of the two components. Photoemission spectroscopic studies confirm the presence of +6 and +7 oxidation states of rhenium in metallic silver in the active catalyst

show abstract

Methyltrioxorhenium-catalyzed epoxidation of olefins with hydrogen peroxide as an oxidant and pyridine N-oxide ionic liquids as additives

Cited by 9 publications

References 51 publications

Synthesis and Conductive Performance of Temperature Control-type Ionic Liquid Based on Keggin Polyoxometalate

Synthesis and Conductive Performance of Temperature Control-type Ionic Liquid Based on Keggin Polyoxometalate

Synthetic utility of metal catalyzed hydrogen peroxide oxidation of C-H, C-C and C=C bonds in alkanes, arenes and alkenes: Recent advances

High Catalytic Synergism between the Components of the Rhenium Complex@Silver Hybrid Material in Alkene Epoxidations

Contact Info

Product

Resources

About