Oxidation of benzyl alcohol and styrene using H2O2 catalyzed by tetraazamacrocycle complexes of Cu(II) and Ni(II) encapsulated in zeolite-Y

Bansal, Vipin; Thankachan, Pompozhi Protasis; Prasad, R.

doi:10.1016/j.apcata.2010.03.027

Cited by 83 publications

(19 citation statements)

References 45 publications

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“…Comparing the activity for the oxidation of styrene our catalysts shows much higher activity than the encapsulated macrocyclic compounds reported [45].…”

Section: Oxidation Of Styrenementioning

confidence: 89%

Metallo Salicylidenetriazol Complexes Encapsulated in Zeolite-Y: Synthesis, Physicochemical Properties and Catalytic Studies

Abbo

Titinchi

2010

Top Catal

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Chromium(III), zinc(II) and nickel(II) complexes of thio-Schiff base derived from salicylaldehyde and 4-amino-2,4-dihydro-1,2,4-triazole-5-thione have been encapsulated in the nanopores of zeolite-Y by a flexible ligand method. The prepared encapsulated metal complexes have been characterized by surface analysis (XRD and N 2 adsorption/desorption), spectroscopic methods, chemical and thermal analyses. The various techniques of characterization used demonstrated that these complexes were effectively encapsulated in the zeolite supercages without structural modification or loss of crystallinity of the zeolite framework. The encapsulated complexes were screened as heterogeneous catalysts for various oxidation reactions such as phenol, cyclohexene and styrene oxidation, using H 2 O 2 as an oxidant. Under the optimized conditions, these catalysts exhibited high to moderate activity. After a few cycles these catalysts were found to be stable and could be reused after recovering without detectable catalyst leaching or significant loss of activity.

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“…Comparing the activity for the oxidation of styrene our catalysts shows much higher activity than the encapsulated macrocyclic compounds reported [45].…”

Section: Oxidation Of Styrenementioning

confidence: 89%

Metallo Salicylidenetriazol Complexes Encapsulated in Zeolite-Y: Synthesis, Physicochemical Properties and Catalytic Studies

Abbo

Titinchi

2010

Top Catal

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“…The catalytic cycle began by forming an anticipated perhydroxy-Cu II complex (A) in the presence of benzyl alcohol and H 2 O 2 . This kind of monomeric copper complex has been postulated to be an active species in various catalytic reactions [61][62][63][64][65]. Benzaldehyde was gained by an intramolecular abstraction of b-hydrogen by perhydroxy moiety of A [66,67].…”

Section: Oxidative Dehydrogenation Of Alcohols With Other Oxidantsmentioning

confidence: 99%

An Overview of Selective Oxidation of Alcohols: Catalysts, Oxidants and Reaction Mechanisms

Zhang

et al. 2015

Catal Surv Asia

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The oxidation of alcohols to carbonyl compounds is one of the most fundamental reactions in synthetic organic chemistry. In order to achieve the realization of dehydrogenation reactions with high atomic efficiency, suitable catalysts and oxidants are considered as the key factors to obtain the optimum activity and aldehydes/ketones selectivity. This review aims to make an overview on the reasonable reaction mechanism and promising catalytic system of alcohols dehydrogenation.

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“…The catalytic cycle begins by formation of the precursor perhydroxy-Cu 2? complex (chemical equation À,`) [23], which has been considered to be an active species in many other catalytic reactions [24,25], and then two electrons transfer from the precursor to Cu 2? with concomitant reproduction of O 2 , ads or O ads species, and the oxidation product is formed at the same time (chemical equation´) [26].…”

Section: Mechanism Of the Oxidation Reactionmentioning

confidence: 99%

Study on the oxidation of vanillymandelic acid to vanillin over mesoporous copper oxide

Duan

Yue

et al. 2015

Reac Kinet Mech Cat

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Mesoporous CuO synthesized by the hydrothermal method was used as a catalyst for the oxidation of vanillymandelic acid to vanillin with molecular oxygen as the terminal oxidant for the first time. The effects of reaction conditions on the catalytic performances have been investigated in detail, almost 100 % conversion of vanillymandelic acid and 88.3 % yield of goal product were achieved under the best conditions of reaction time 6 h, oxygen pressure 0.45 MPa, 85°C and pH 12.5. In addition, the mesoporous CuO revealed outstanding recyclability and exhibited several pivotal advantages, including mild reaction conditions, environmentally friendly oxidant, as well as greatly reduced the amount of catalyst. A plausible mechanism for the liquid-phase oxidation of vanillymandelic acid on CuO was proposed.

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Oxidation of benzyl alcohol and styrene using H2O2 catalyzed by tetraazamacrocycle complexes of Cu(II) and Ni(II) encapsulated in zeolite-Y

Cited by 83 publications

References 45 publications

Metallo Salicylidenetriazol Complexes Encapsulated in Zeolite-Y: Synthesis, Physicochemical Properties and Catalytic Studies

Metallo Salicylidenetriazol Complexes Encapsulated in Zeolite-Y: Synthesis, Physicochemical Properties and Catalytic Studies

An Overview of Selective Oxidation of Alcohols: Catalysts, Oxidants and Reaction Mechanisms

Study on the oxidation of vanillymandelic acid to vanillin over mesoporous copper oxide

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