scholarly journals Ti(Phen)(OC2H5)2Cl2: a highly efficient pre-catalyst for selective oxidation of organic sulfides to sulfoxides by hydrogen peroxide

RSC Advances ◽  
2017 ◽  
Vol 7 (70) ◽  
pp. 44259-44264 ◽  
Author(s):  
Rong-Hui Wu ◽  
Jing Wu ◽  
Ming-Xin Yu ◽  
Long-Guan Zhu
Keyword(s):  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
Room Temperature ◽  
Titanium Complex ◽  
Stoichiometric Amount ◽  
Highly Efficient ◽  
Organic Sulfides

A structurally characterized titanium complex [Ti(Phen)(OC2H5)2Cl2] (Phen = 1,10-phenanthroline) is reported as a homogeneous pre-catalyst for the selective oxidation of organic sulfides to sulfoxides with a stoichiometric amount H2O2 in CH3OH at room temperature.

scholarly journals Tailorable Aqueous-Media Synthesis of Heterogeneous Copper Nanoparticles Hybrids and Application in Selective Oxidation of Benzene

2019 ◽  
Author(s):  
Noelia Losada-Garcia ◽  
Alba Rodriguez-Otero ◽  
Jose M Palomo
Keyword(s):  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
Copper Nanoparticles ◽  
Room Temperature ◽  
Aqueous Media ◽  
Green Technology ◽  
Direct Oxidation ◽  
Experimental Conditions ◽  
Copper Species ◽  
Oxidation Of Benzene

Novel heterogeneous nanocatalysts has been synthesized in aqueous media at multimilligram scale for highly selective direct oxidation of benzene to phenol in aqueous media. The synthesis of a novel biohybrids containing copper nanoparticles (CuNPs) by an efficient and green technology have been described. The methodology involves the combination of an enzyme and a copper salt in aqueous media at room temperature. It was possible to control the copper species and nanoparticle size depending on the experimental conditions, e.g. pH, reducing step, amount of enzyme, obtaining novel heterogeneous nanobiohybrids containing exclusively Cu (0)NPs, Cu2O (Cu(i)) NPs or very crystalline Cu3(PO4)2 (Cu (ii)) NPs. Very small dispersed copper nanoparticles were formed in all cases (from 3 to 15 nm). These novel CuNPs biohybrids were evaluated as catalyst in the selective oxidation of benzene to phenol in water at 30ºC using hydrogen peroxide as oxidant, obtaining excellent yields and selectivity of phenol (>80% yield, >95% selectivity). <br>

Efficient and selective oxidation of alcohols to carbonyl compounds at room temperature by a ruthenium complex catalyst and hydrogen peroxide

2019 ◽  
Vol 43 (48) ◽  
pp. 19415-19421 ◽  
Author(s):  
Jie-Xiang Wang ◽  
Xian-Tai Zhou ◽  
Qi Han ◽  
Xiao-Xuan Guo ◽  
Xiao-Hui Liu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
Carbonyl Compounds ◽  
Room Temperature ◽  
Ruthenium Complex ◽  
Secondary Alcohols ◽  
Complex Catalyst ◽  
Efficient System ◽  
Oxidation Of Alcohols

An efficient system comprising a ruthenium complex and hydrogen peroxide was developed for the oxidation of various primary and secondary alcohols at room temperature.

Bimetallic titanium complex catalyzed enantioselective oxidation of thioethers using aqueous H2O2 as a terminal oxidant

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47732-47739 ◽  
Author(s):  
Prasanta Kumar Bera ◽  
Naveen Gupta ◽  
Sayed H. R. Abdi ◽  
Noor-ul H. Khan ◽  
Rukhsana I. Kureshy ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic System ◽  
Sulfide Oxidation ◽  
Environmentally Benign ◽  
Aqueous Hydrogen Peroxide ◽  
Titanium Complex ◽  
Enantioselective Oxidation ◽  
Highly Efficient

This study represents a highly efficient sulfide oxidation catalytic system using a non-toxic Ti-catalyst and environmentally benign aqueous hydrogen peroxide.

scholarly journals Highly Efficient and Ambient-Temperature Synthesis of Benzimidazoles via Co(III)/Co(II)-Mediated Redox Catalysis

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 59
Author(s):  
Renyuan Zhong ◽  
Wulin Xiong ◽  
Haoyuan Zhang ◽  
Tongtong Zeng ◽  
Shanshan Gong ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Ambient Temperature ◽  
Efficient Method ◽  
Solvent Free ◽  
Redox Catalysis ◽  
Temperature Synthesis ◽  
Fast Green ◽  
Stoichiometric Amount ◽  
Highly Efficient ◽  
Solvent Free Conditions

An efficient method for ambient-temperature synthesis of a variety of 2-substituted and 1,2-disubstituted benzimidazoles from aldehyde and phenylenediamine substrates has been developed by utilizing Co(III)/Co(II)-mediated redox catalysis. The combination of only 1 mol% of Co(acac)2 and stoichiometric amount of hydrogen peroxide provides a fast, green, and mild access to a diversity of benzimidazoles under solvent-free conditions.

Tetrabutylammonium tribromide impregnated MCM-48 as a heterogeneous catalyst for selective oxidation of sulfides

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38044-38047 ◽  
Author(s):  
Prasanta Gogoi ◽  
Sukanya Hazarika ◽  
Pranjit Barman
Keyword(s):  
Hydrogen Peroxide ◽  
Heterogeneous Catalyst ◽  
Selective Oxidation ◽  
Oxidation Of Sulfides ◽  
Highly Efficient ◽  
Tetrabutylammonium Tribromide ◽  
Efficient Heterogeneous Catalyst

We report here tetrabutylammonium tribromide supported on MCM-48 as a highly efficient heterogeneous catalyst for the selective oxidation of sulfides, in ethanolic medium using hydrogen peroxide as an oxidant.

Highly efficient detection of hydrogen peroxide in solution and in the vapor phase via fluorescence quenching

2015 ◽  
Vol 51 (32) ◽  
pp. 7061-7064 ◽  
Author(s):  
Patrick Marks ◽  
Bhasker Radaram ◽  
Mindy Levine ◽  
Igor A. Levitsky
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Fluorescence Quenching ◽  
Vapor Phase ◽  
Conjugated Polymer ◽  
Sensitive Detection ◽  
Titanium Complex ◽  
Highly Efficient ◽  
Efficient Detection

Herein we report the highly efficient and sensitive detection of hydrogen peroxide in both aqueous solution and in the vapor phaseviafluorescence quenching (turn-off mechanism) of the amplified fluorescent conjugated polymer–titanium complex induced by hydrogen peroxide.

scholarly journals Tailorable Aqueous-Media Synthesis of Heterogeneous Copper Nanoparticles Hybrids and Application in Selective Oxidation of Benzene

2019 ◽  
Author(s):  
Noelia Losada-Garcia ◽  
Alba Rodriguez-Otero ◽  
Jose M Palomo
Keyword(s):  
Hydrogen Peroxide ◽  
Selective Oxidation ◽  
Copper Nanoparticles ◽  
Room Temperature ◽  
Aqueous Media ◽  
Green Technology ◽  
Direct Oxidation ◽  
Experimental Conditions ◽  
Copper Species ◽  
Oxidation Of Benzene

Novel heterogeneous nanocatalysts has been synthesized in aqueous media at multimilligram scale for highly selective direct oxidation of benzene to phenol in aqueous media. The synthesis of a novel biohybrids containing copper nanoparticles (CuNPs) by an efficient and green technology have been described. The methodology involves the combination of an enzyme and a copper salt in aqueous media at room temperature. It was possible to control the copper species and nanoparticle size depending on the experimental conditions, e.g. pH, reducing step, amount of enzyme, obtaining novel heterogeneous nanobiohybrids containing exclusively Cu (0)NPs, Cu2O (Cu(i)) NPs or very crystalline Cu3(PO4)2 (Cu (ii)) NPs. Very small dispersed copper nanoparticles were formed in all cases (from 3 to 15 nm). These novel CuNPs biohybrids were evaluated as catalyst in the selective oxidation of benzene to phenol in water at 30ºC using hydrogen peroxide as oxidant, obtaining excellent yields and selectivity of phenol (>80% yield, >95% selectivity). <br>

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