Dioxomolybdenum(vi) complex immobilized on ascorbic acid coated TiO2 nanoparticles catalyzed heterogeneous oxidation of olefins and sulfides

2015 ◽  
Vol 17 (1) ◽  
pp. 442-452 ◽  
Author(s):  
Maasoumeh Jafarpour ◽  
Abdolreza Rezaeifard ◽  
Mahboube Ghahramaninezhad ◽  
Fahimeh Feizpour
Keyword(s):  
Ascorbic Acid ◽  
Tio2 Nanoparticles ◽  
Environmentally Benign ◽  
Green Solvent ◽  
Heterogeneous Oxidation ◽  
Oxidation Of Sulfides ◽  
Oxidation Of Olefins ◽  
Epoxidation Of Olefins

TiO2/AA/MoO2 nanocomplex demonstrated desired activity and selectivity in the epoxidation of olefins and oxidation of sulfides to sulfoxides using H2O2 as an environmentally benign oxidant in ethanol as a green solvent.

Oxidation Reactions Catalyzed by Polyoxomolybdate Salts

2013 ◽  
Vol 68 (5-6) ◽  
pp. 587-597 ◽  
Author(s):  
Bo Zhang ◽  
Su Li ◽  
Alexander Pöthig ◽  
Mirza Cokoja ◽  
Shu-Liang Zang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Environmentally Benign ◽  
Oxidation Reactions ◽  
X Ray Diffraction ◽  
Oxidation Of Sulfides ◽  
Urea Hydrogen Peroxide ◽  
Ionic Compounds ◽  
Solid State Structures ◽  
Epoxidation Of Olefins

Ionic compounds containing the polyoxomolybdate anion [Mo6O19]2- and [(n-C4H9)4P]+ (tetrabutylphosphonium), [(n-C4H9)3P(n-C14H29)]+ (tributyl (tetradecyl)phosphonium), [Bmim]+ (1- butyl-3-methylimidazolium) and [Dbmim]+ (1,2-dimethyl-3-butylimidazolium) cations were prepared and characterized, including the determination of three of the solid state structures by singlecrystal X-ray diffraction. These compounds were applied as catalysts for the epoxidation of olefins with urea hydrogen peroxide (UHP) as oxidant in the ionic liquid [Bmim]PF6. Additionally, the oxidation of sulfides to sulfoxides with hydrogen peroxide (H2O2) in several solvents was investigated. The polyoxomolybdate catalysts showed a good performance for epoxidation of olefins as well as for oxidation of sulfides. Furthermore, the catalysts can be recycled several times in oxidation reactions. We present this methodology for the oxidation reaction in a simple, economically, technically, and environmentally benign manner

An efficient one pot three-component nanocatalyzed synthesis of spiroheterocycles using TiO2 nanoparticles as a heterogeneous catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46415-46422 ◽  
Author(s):  
Yogesh Kumar Tailor ◽  
Sarita Khandelwal ◽  
Yogita Kumari ◽  
Kamlendra Awasthi ◽  
Mahendra Kumar
Keyword(s):  
Tio2 Nanoparticles ◽  
Heterogeneous Catalyst ◽  
Environmentally Benign ◽  
One Pot

An efficient, environmentally benign isocyanide-based domino protocol is presented for synthesizing spiroheterocycles with 2-amino benzothiazole/1,3,4-thiadiazole, cyclohexyl/tert-butyl isocyanides and isatines/cyclic carbonyls, catalyzed by recyclable nanocrystalline TiO2.

Surface-modified TiO2 nanoparticles with ascorbic acid: Antioxidant properties and efficiency against DNA damage in vitro

2017 ◽  
Vol 155 ◽  
pp. 323-331 ◽  
Author(s):  
Vladan Bajić ◽  
Biljana Spremo-Potparević ◽  
Lada Živković ◽  
Andrea Čabarkapa ◽  
Jelena Kotur-Stevuljević ◽  
...  
Keyword(s):  
Dna Damage ◽  
Ascorbic Acid ◽  
Tio2 Nanoparticles ◽  
Antioxidant Properties ◽  
Surface Modified

A new halide-free efficient reaction-controlled phase-transfer catalyst based on silicotungstate of [(C18H37)2(CH3)2N]3[SiO4H(WO5)3] for olefin epoxidation, oxidation of sulfides and alcohols with hydrogen peroxide

RSC Advances ◽  
2014 ◽  
Vol 4 (61) ◽  
pp. 32054-32062 ◽  
Author(s):  
Baochun Ma ◽  
Wei Zhao ◽  
Fuming Zhang ◽  
Yingshuai Zhang ◽  
Songyun Wu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Transfer ◽  
Alcohol Oxidation ◽  
Phase Transfer Catalyst ◽  
Environmentally Benign ◽  
Olefin Epoxidation ◽  
Oxidation Of Sulfides ◽  
Highly Efficient

A new environmentally benign and highly efficient reaction-controlled phase-transfer catalyst for olefin epoxidation, sulfide and alcohol oxidation was developed.

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