The selective oxidation of methane to methanol is a highly challenging target, which considerable interest gain value-added chemicals directly from fuel gas. Copper-containing zeolites, such as Cu/mordenite, have been currently reported be the most efficient catalysts for this reaction. In work, it shown that solid-state ion-exchanged Cu/mordenites exhibit significantly higher activity partial than comparable reference catalysts, i.e., prepared by conventional liquid-phase ion exchange...

Two defective MOF-808 materials synthesized by a facile mixed-linker approach show significantly higher adsorption capacity compared to standard MOF-808.

Valorization of pineapple peel waste is an attractive research topic because the huge quantities this byproduct generated from processing industries. In study, extract was collected to produce a hydrogel-like form containing bacterial cellulose fibers with three-dimensional structure and nanoscale diameter by Acetobacter xylinum fermentation process. The suspension subsequently activated freeze-drying, affording lightweight aerogels as potential adsorbents in wastewater treatment, particular...

The direct partial oxidation of methane to methanol is a challenging scientific and economical objective expand the application this abundant fuel gas as major resource for one-step production value-added chemicals. Despite substantial efforts commercialize synthetic route, date no heterogeneous catalyst can selectively oxidize by O2 with an economically acceptable conversion. Cu-exchanged zeolites have been recently highlighted one most promising bioinspired catalysts toward from under mild...

The study presented a green and benign approach via mechanochemistry for rapidly preparing typical cobalt-based zeolitic imidazolate framework, namely ZIF-9. structural, morphological textural properties of the obtained material were confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen sorption at 77 K. prepared was then employed as an efficient adsorbent to remove Congo red (CR) from aqueous solution. Intensive experiments conducted with removal CR investigate...

This study presents a simple approach to prepare MOF-808, an ultra-stable Zr-MOF constructed from 6-connected zirconium clusters and 1,3,5-benzene tricarboxylic acid, with tailored particle sizes. Varying the amount of formic acid as modulator in range 200–500 equivalents results MOF-808 materials crystal size 40 nm approximately 1000 nm. Apart high specific surface area, combination fraction mesopore plenty acidic centers on Zr-clusters induces better interaction ionic pollutants such...

A new mixed-linker iron-based MOF VNU-20 [Fe₃(BTC)(NDC)₂·6.65H₂O] was solvothermally synthesized, and utilized as catalyst for the coupling transformation of coumarins with <italic>N</italic>,<italic>N</italic>-dimethylanilines.

Herein we report a method for affording 2-benzyl benzoxazoles from substituted styrenes and 2-nitrophenols. The success of this relies on the use simple reagents, namely elemental sulfur DABCO. A combination identical reagents was utilized annulation with

In this work, we introduce a novel defective analogue of the representative 6-connected zirconium-based metal-organic framework (MOF-808), by employing 5-sulfoisophthalic acid monosodium salt (H2BTC-SO3Na) as defect inducer via mixed-linker approach. The structural integrity and different physicochemical properties were investigated various characterization techniques, including powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), nitrogen...

Abstract Herein, we present an efficient, one‐pot reaction for accessing 3‐benzylated indoles via the coupling of benzyl alcohols with under heterogeneous catalysis by manganese ferrite (MnFe 2 O 4 ) nanoparticles. Notably, this reaction, first time, employs MnFe nanoparticles prepared using a simple grinding method. The high compatibility enables broad substrate scope and regioselectivity. Moreover, approach offers several attractive highlights including use recyclable oxide catalyst green...

A new iron‐organic framework, VNU‐22 {[Fe 3 (BTC)(BPDC) 2 ] · 11.97H O}, constructed from BTC 3– , BPDC 2– pillars and infinite [Fe (CO ) 7 ∞ rod SBU, was obtained. The utilized as a heterogeneous catalyst in the synthesis of 2,4,6‐triphenylpyridines via cascade reactions acetophenones phenylacetic acids with ammonium acetate nitrogen source. This transformation is new. more active than many homogeneous catalysts. framework recovered reutilized without an appreciable decline its performance....

A Cu2(OBA)2(BPY) metal-organic framework was utilized as a productive heterogeneous catalyst for the synthesis of 3-aroylquinolines via one-pot domino reactions 2-aminobenzylalcohols with propiophenones. This Cu-MOF considerably more active towards reaction than series transition metal salts, well nano oxide and MOF-based catalysts. The reusable without significant decline in catalytic efficiency. To best our knowledge, transformation to not previously reported literature, this protocol...

A simple grinding method using polyvinylpyrrolidone (PVP) as a capping agent is introduced to synthesize CoFe2O4 nanoparticles. The effects of calcination temperature (ranging from 450 850 °C) on the structural, morphological, physical, and optical properties materials are investigated various techniques, including thermogravimetric analysis/differential scanning calorimetry (TGA/DSC), powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), N2 adsorption isotherm,...

Alcohols are common alkylating agents and starting materials alternative to harmful alkyl halides. In this study, a simple, benign efficient pathway was developed synthesize 1,3-diphenylpropan-1-ols via the β-alkylation of 1-phenylethanol with benzyl alcohols. Unlike conventional borrowing hydrogen processes in which alcohols were activated by transition-metal catalyzed dehydrogenation, work, t-BuONa suggested be dual-role reagent, namely, both base radical initiator, for coupling aromatic...

Abstract BACKGROUND Grand efforts have been recently devoted to the development of catalysts based on excellent performance Cu‐ and Fe‐dependent enzymes in methanotrophic bacteria for partial oxidation methane methanol under ambient conditions. As a continuation study stepwise manner this conversion over zeolite‐based catalysts, work, effects zeolite topology activation temperature catalytic Fe‐containing zeolites were investigated. RESULTS Cu species exchanged medium‐pore (mordenite, ZSM‐5,...

We report a new method for the synthesis of substituted quinazolines by condensation 2-nitrobenzyl alcohols with arylacetic acids. The transformation requires use urea as nitrogen source, elemental sulfur promoter, DABCO base, and DMSO solvent. Functionalities such chloro, fluoro, trifluoromethyl, thienyl, indolyl groups were all compatible reaction conditions. Because our uses stable simple substrates to obtain N,N-heterocycles in absence transition metals, it offers potential pathway...

A simple method for coupling of anilines, acetophenones, and elemental sulfur to afford N-arylthioglyoxamides has been developed. Reactions proceeded in the presence Na2SO3 DMSO, thus eliminating need transition metals external oxidants. Functionalities such as halogen, ester, methylthio, heterocycle groups were compatible with conditions. Electron-poor acetophenones sometimes gave isosteric glyoxamides.

Abstract Quinazolinone synthesis usually requires employing sensitive substrates, hazardous solvents, large excess oxidants, and expensive catalysts. In this study, an efficient environmentally benign pathway was developed to synthesize 2-phenylquinazolin-4(3 H )-one via oxidative coupling between commercially available stable chemicals, including 2-aminobenzamide benzyl alcohol without toxic oxidizing agents transition-metal A high yield of the desired product (up 84%) obtained at 120°C for...