Oxidation Of Alcohols In Water Research Articles

Reactive Template Method to Synthesize Gold Nanoparticles with Controllable Size and Morphology Supported on Shells of Polymer Hollow Microspheres and Their Application for Aerobic Alcohol Oxidation in Water

AbstractA novel method has been developed to synthesize gold nanoparticles with tunable size and morphology supported on both inner and outer surfaces of poly(o‐phenylenediamine) (PoPD) hollow microspheres, which act as both reductant and template/stabilizer. The size of gold nanoparticles supported on shells of PoPD hollow microspheres can be tuned from 3 to 15 nm by changing the concentration of the gold source, HAuCl4. Gold nanorods supported on shells of PoPD hollow microspheres can also be fabricated by introducing a well‐known seed‐growth strategy. In addition, silver nanoparticles supported on shells of PoPD hollow microspheres can also be successfully fabricated using the same strategy, which indicates the diversity of this proposed method for polymer hollow microspheres supporting noble metal nanoparticles. The products are characterized by X‐ray diffraction and contact angle analysis. Furthermore, the catalytic activity of the obtained PoPD‐microsphere‐supported gold nanoparticles for aerobic alcohol oxidation is investigated. The results demonstrate that such polymer‐supported gold nanoparticles can be used as reusable catalysts with high catalytic activity for aerobic alcohol oxidation in water.

Applications of a high performance platinum nanocatalyst for the oxidation of alcohols in water

Download options Please wait... Supplementary files E-factor calculations PDF (111K) Article information DOI https://doi.org/10.1039/B815948C Article type Paper Submitted 11 Sep 2008 Accepted 12 Jan 2009 First published 17 Feb 2009 Download Citation Green Chem., 2009,11, 554-561 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Request permissions Applications of a high performance platinum nanocatalyst for the oxidation of alcohols in water P. Maity, C. S. Gopinath, S. Bhaduri and G. K. Lahiri, Green Chem., 2009, 11, 554 DOI: 10.1039/B815948C To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page. Read more about how to correctly acknowledge RSC content. Social activity Tweet Share Search articles by author Prasenjit Maity Chinnakonda S. Gopinath Sumit Bhaduri Goutam Kumar Lahiri

ChemInform Abstract: An Efficient and Reusable Carbon‐Supported Platinum Catalyst for Aerobic Oxidation of Alcohols in Water.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

An efficient and reusable carbon-supported platinum catalyst for aerobic oxidation of alcohols in water

Platinum nanoparticles embedded in a hollow porous carbon shell prepared by a photocatalytic reaction acted as a reusable catalyst for the aerobic oxidation of alcohols under atmospheric pressure of oxygen in water.

Microgel-stabilized gold nanoclusters: Powerful “quasi-homogeneous” catalysts for the aerobic oxidation of alcohols in water

Gold nanoclusters of small size (2.5 nm) and narrow size distribution were synthesized in solution using tailor-made soluble cross-linked polymers (microgels) as exotemplates and stabilizers. The resulting microgel-stabilized nanoclusters could be conveniently isolated by precipitation, stored in the solid state, and redispersed in water and polar organic solvents. They were found to exhibit remarkable catalytic activity (average TOF up to 960 h −1) in the aerobic oxidation of benzylic and aliphatic alcohols and also of polyols in water under mild conditions (50–70 °C, 1–3 atm O 2).

Photo oxidation of alcohols in water under solar light

Abstract An very simple and effective procedure for the oxidation of alcohols was carried out at room temperature in water under solar light using Oxone® (2KHSO5 · KHSO4 · K2SO4) as oxidant catalyzed by KBr. Benzyl alcohol and its derivatives, benzhydrol and its derivatives, cyclopentanol and cyclohexanol could converted to the corresponding acids or ketones in high conversion and selectivity in 3 h.

I2O5: Mild and Efficient Reagents for the Oxidation of Alcohols in Water.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Palladium Neocuproine Catalyzed Aerobic Oxidation of Alcohols in Aqueous Solvents

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Water‐Soluble Diruthenium Complexes Bearing Acetate and Carbonate Bridges: Highly Efficient Catalysts for Aerobic Oxidation of Alcohols in Water.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

I 2O 5: mild and efficient reagents for the oxidation of alcohols in water

The mild and efficient nature of HIO 3 and I 2O 5 as environmentally benign, commercially available, atom efficient, and safe reagents for the oxidation of alcohols has been demonstrated. Additionally, these oxidants are highly chemoselective, and effect smooth room temperature oxidation of various electron-rich alcohols with catalytic amounts of KBr in water.

A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water

A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water

A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water

A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water

Development of Environmentally Benign Oxidations Using Hypervalent Iodine (III)Reagents

We have synthesized a novel, nonpolymer-supported recyclable hypervalent iodine (III) reagent, 1,3,5,7-tetrakis[4-(diacetoxyiodo)phenyl]adamantane 3a and its derivatives 3b, c and utilized them in environmentally benign oxidations. The new reagents 3a-c mediate a wide range of oxidative transformations with efficiencies similar to those of conventional reagents, phenyliodine (III) diacetate (PIDA), pheyliodine (III) bis (trifluoroacetate) (PIFA), and (hydroxyl(tosyloxy)iodo). benzene (HTIB), and have higher reactivity compared with polymer-supported recyclable reagents such as poly(diacetoxyiodo)styrene (PDAIS) and poly{bis(trifluoroacetoxy)iodo}styrene (PBTIS). In all cases, tetraiodide 4 was recovered nearly quantitatively in a pure form after simple workup, i.e., filtration. Reoxidation of 4 to 3a with m-chloroperbenzoic acid also proceeded quantitatively, without loss of oxidative activity. Recyclable 3a-c are used in various organic solvents as well as water, and thus mild and clean oxidation of alcohols in water has been achieved using 3a. A facile synthesis of aldehydes from primary alcohols has also been demonstrated using a dual recycling strategy, with 3a and recyclable 2,2,6,6-tetramethyl-1-piperidinyloxy free radical (TEMPO).

The Green Catalytic Oxidation of Alcohols in Water by Using Highly Efficient Manganosilicate Molecular Sieves.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Palladium-neocuproine catalyzed aerobic oxidation of alcohols in aqueous solvents

An overview is presented on the performance of Pd-complexes with phenanthroline-type ligands that are highly active catalysts for alcohol oxidation in water as well as in water/polar co-solvent mixtures. The mechanistic details of this intriguingly active and stable Pd-species are summarized. The (neocuproine)Pd(OAc) 2 catalyst is unique in that it tolerates water, polar co-solvents and a wide variety of functional groups in the alcohol. Turnover frequencies of >1500 h −1 were achieved in the latter case and a series of alcohols was oxidized with 0.1–0.5 mol% of catalyst.

Water-soluble diruthenium complexes bearing acetate and carbonate bridges: highly efficient catalysts for aerobic oxidation of alcohols in water

The aerobic oxidation of alcohols in water can be performed efficiently in the presence of a catalytic amount of the water-soluble diruthenium complex Ru2(micro-OAc)3(micro-CO3) under an atmospheric pressure (1 atm) of O2.

The green catalytic oxidation of alcohols in water by using highly efficient manganosilicate molecular sieves

An efficient and green catalytic protocol for the oxidation of alcohols to the corresponding aldehydes is the need of industry and is continuously being sought for. This report describes the use of manganosilicate molecular sieves as an efficient heterogeneous catalyst in aqueous conditions using the peroxodisulfate ions as the oxidising agent. The advantageous feature of this oxidation methodology is the efficiency and selectivity with which it oxidizes the heterocyclic and aliphatic alcohols. The other interesting facet of this communication is the synthesis of manganosilicate molecular sieves by a facile complexing procedure leading to the uniform mesoporous cubic structure devoid of extra-framework bulk manganese oxide species.

Efficient aerobic oxidation of alcohols in water catalysed by microgel-stabilised metal nanoclusters

Noble metal nanoclusters stabilised by N , N -dimethylacrylamide-based soluble cross-linked polymers (microgels) have been prepared and tested as catalysts in the selective oxidation of secondary alcohols to the corresponding carbonyl compounds with molecular oxygen in water. Pd nanoclusters turned out to be superior catalysts compared with nanoclusters of other noble metals, such as Pt or Au; they are efficient (TOF up to 70 h −1) and easily recoverable by simple extraction of the reaction product from the aqueous phase.

Size-Specific Catalytic Activity of Polymer-Stabilized Gold Nanoclusters for Aerobic Alcohol Oxidation in Water

Gold nanoclusters (phi = 1.3 nm) stabilized by poly(N-vinyl-2-pyrrolidone) (Au:PVP NCs) readily oxidize benzylic alcohols to the corresponding aldehydes and/or carboxylic acids under ambient temperature in water. Kinetic measurement revealed that smaller Au:PVP NCs exhibit higher catalytic activity than larger (9.5 nm) homologues and, more surprisingly, than Pd:PVP NCs of comparable size (1.5 and 2.2 nm). On the basis of the marked difference in the kinetic isotope effect and activation energy between Au:PVP and Pd:PVP NCs, a reaction mechanism for alcohol oxidation catalyzed by Au:PVP NCs is proposed in which a superoxo-like molecular oxygen species adsorbed on the surface of the small Au NCs abstracts a hydrogen atom from the alkoxide.