Nickel(ii)dibenzotetramethyltetraaza[14]annulene complex immobilized on amino-functionalized TUD-1: an efficient catalyst for immediate and quantitative epoxidation of cyclohexene under ambient conditions

2020 ◽  
Vol 44 (46) ◽  
pp. 20137-20147
Author(s):  
Mohamed Abboud ◽  
Taher Sahlabji ◽  
Murad Eissa ◽  
Radhouane Bel-Hadj-Tahar ◽  
Ahmed T. Mubarak ◽  
...  
Keyword(s):  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Epoxidation Of Cyclohexene

Nickel(ii)dibenzotetramethyltetraaza[14]annulene complex immobilized on amino-functionalized TUD-1 as a new nanocatalyst for spontaneous and quantitative epoxidation of cyclohexene under ambient conditions.

SO3H-functionalized Zeolite-Y as an Efficient Nanocatalyst for the Synthesis of Nbenzimidazole- 2-aryl-4-thiazolidinones and tri-substituted Imidazoles

2020 ◽  
Vol 17 (2) ◽  
pp. 117-130 ◽  
Author(s):  
Mehdi Kalhor ◽  
Zohre Zarnegar ◽  
Zahra Seyedzade ◽  
Soodabeh Banibairami
Keyword(s):  
Zeolite Y ◽  
Internal Standard ◽  
Acid Catalyst ◽  
Aromatic Aldehydes ◽  
Reaction Rates ◽  
Ambient Conditions ◽  
Catalytic Method ◽  
Efficient Catalyst ◽  
Bet Analysis ◽  
Ft Ir

Background: SO3H-functionalized zeolite-Y was prepared and used as a catalyst for the synthesis of 2-aryl-N-benzimidazole-4-thiazolidinones and tri-substituted imidazoles at ambient conditions. Objective: The goals of this catalytic method include excellent yields and high purity, inexpensive procedure and ease of product isolation, the use of nontoxic and heterogeneous acid catalyst, shorter reaction times and milder conditions. Materials and Methods: NMR spectra were recorded on Brucker spectrophotometer using Me4Si as internal standard. Mass spectra were recorded on an Agilent Technology 5975C VL MSD with tripe-axis detector. FTIR spectra were obtained with KBr disc on a galaxy series FT-IR 5000 spectrometer. The surface morphology of nanostructures was analyzed by FE-SEM (EVO LS 10, Zeiss, Carl Zeiss, Germany). BET analysis were measured at 196 °C by a Japan Belsorb II system after the samples were vacuum dried at 150°C overnight. Results: The NSZ was characterized by FT-IR, FESEM, EDX, XRF, and BET. The catalytic activity of NSZ was investigated for synthesis of 1,3-tiazolidin-4-ones in H2O/Acetone at room temperature. Moreover, NSZ was used for synthesis of tri-substituted imidazoles at 60 °C via solvent-free condensation. Different kinds of aromatic aldehydes were converted to the corresponding of products with good to excellent yields. Conclusion: Sulfonated zeolite-Y was as an efficient catalyst for the preparation of N-benzimidazole-2-aryl-1,3- thiazolidin-4-ones and 2,4,5-triaryl-1H-imidazoles. High reaction rates, elimination toxic solvent, simple experimental procedure and reusability of the catalyst are the important features of this protocol.

Reduced Graphene Oxide Supported Ag Nanoparticles: An Efficient Catalyst for CO 2 Conversion at Ambient Conditions

ChemCatChem ◽  
2020 ◽  
Vol 12 (19) ◽  
pp. 4825-4830
Author(s):  
Xiao Zhang ◽  
Kai‐Hong Chen ◽  
Zhi‐Hua Zhou ◽  
Liang‐Nian He
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Ag Nanoparticles ◽  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Reduced Graphene

Developing an efficient catalyst for controlled oxidation of small alkanes under ambient conditions

2014 ◽  
Vol 4 (4) ◽  
pp. 930-935 ◽  
Author(s):  
Penumaka Nagababu ◽  
Steve S.-F. Yu ◽  
Suman Maji ◽  
Ravirala Ramu ◽  
Sunney I. Chan
Keyword(s):  
Alkane Oxidation ◽  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Efficient Conversion

Catalysis of alkane oxidation by a tricopper complex. The tricopper complex can mediate efficient conversion of small alkanes to their corresponding alcohols without over oxidation under ambient conditions.

g-C3N4 and tetrabutylammonium bromide catalyzed efficient conversion of epoxide to cyclic carbonate under ambient conditions

2017 ◽  
Vol 41 (24) ◽  
pp. 14839-14842 ◽  
Author(s):  
Tanmoy Biswas ◽  
Venkataramanan Mahalingam
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Efficient Conversion

A g-C3N4 and n-Bu4N+Br− combination was found to be an efficient catalyst for the conversion of epoxides to cyclic carbonates under CO2 filled balloon conditions.

Cu doped MnO2/γ-Al2O3: a facile and efficient catalyst for the degradation of Na2S in waste water under ambient conditions

2020 ◽  
Vol 129 (2) ◽  
pp. 1047-1059
Author(s):  
Wenyao Cui ◽  
Rui Zhao ◽  
Xiaoqiao Huang ◽  
Jianxin Li ◽  
Zaozao Xiao ◽  
...  
Keyword(s):  
Waste Water ◽  
Ambient Conditions ◽  
Efficient Catalyst

AgX@carbon (X = Br and I) as robust and efficient catalysts for the reaction of propargylic alcohols and CO2 to carbonates under ambient conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54020-54026 ◽  
Author(s):  
Jikuan Qiu ◽  
Yuling Zhao ◽  
Huiyong Wang ◽  
Guokai Cui ◽  
Jianji Wang
Keyword(s):  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Propargylic Alcohols ◽  
Highly Efficient

An easily prepared AgX@C material was found to be a highly efficient catalyst for transforming CO2 into carbonates.

scholarly journals Titanium dioxide-benzophenone hybrid as an effective catalyst for enhanced photochemical degradation of low density polyethylene

e-Polymers ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 501-510 ◽  
Author(s):  
Thi Kim Ngan Nguyen ◽  
Hong Gun Kim ◽  
Lee Ku Kwac ◽  
Quoc Bao Bui ◽  
Dang Mao Nguyen ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Ethylene Vinyl Acetate ◽  
Mechanical Tests ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Photochemical Degradation ◽  
Ambient Conditions ◽  
Scanning Calorimetry ◽  
Efficient Catalyst ◽  
Ldpe Film

AbstractIn this study, a hybrid of titanium dioxide, benzophenone and ethylene vinyl acetate (TiO2-BP-EVA) was used as a novel catalyst to accelerate photo-oxidization reaction of low-density polyethylene (LDPE) film under ambient conditions. The degradation of the LDPE films (thickness of ~25 μm) containing different catalyst concentrations were successfully investigated by different techniques, such as Fourier-transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (SEM), differential scanning calorimetry (DSM), thermogravimetric analysis (TGA) and mechanical tests. The results showed that the use of catalyst in which TiO2-BP content (1/3 w/w) is 0.5 phr (parts per hundred resin) and EVA content is 4.5 phr in a LDPE film provided the best degradation rate. The carbonyl index of the polymer film achieved the highest value without an equilibrium stage. Besides, the carbon-carbon backbone of the polymer was completely broken down consistent with the deformation of the surface. In addition, the mechanical properties impressively dropped after 3 months’ exposure. The obtained results imply that the TiO2-BP-EVA compound can be considered as an efficient catalyst for the photodegradation of LDPE polymer.

Catalytic oxidation of alkanes by a (salen)osmium(vi) nitrido complex using H2O2 as the terminal oxidant

2015 ◽  
Vol 51 (71) ◽  
pp. 13686-13689 ◽  
Author(s):  
Man Chen ◽  
Yi Pan ◽  
Hoi-Ki Kwong ◽  
Raymond J. Zeng ◽  
Kai-Chung Lau ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Complex Functions

A (salen)osmium(vi) nitrido complex functions as an efficient catalyst for the oxidation of alkanes under ambient conditions using H2O2 as the oxidant.

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