A5007048047- Chemical Synthesis and Reactions
- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Ionic liquids properties and applications
- Catalysis and Hydrodesulfurization Studies
- Catalytic Cross-Coupling Reactions
- Multicomponent Synthesis of Heterocycles
- Mesoporous Materials and Catalysis
- Nanomaterials for catalytic reactions
- Asymmetric Hydrogenation and Catalysis
- Sulfur-Based Synthesis Techniques
- Chemical Synthesis and Analysis
- Catalytic C–H Functionalization Methods
- Carbon dioxide utilization in catalysis
- Synthetic Organic Chemistry Methods
- Oxidative Organic Chemistry Reactions
- Electrochemical Analysis and Applications
- Enzyme Catalysis and Immobilization
- Organoboron and organosilicon chemistry
- Synthesis of Indole Derivatives
- Electrochemical sensors and biosensors
- Petroleum Processing and Analysis
- Organometallic Complex Synthesis and Catalysis
- Diverse Musicological Studies
King Fahd University of Petroleum and Minerals
2018-2025
King Abdullah University of Science and Technology
2015-2018
National University of Singapore
2014
Institute of Chemical Technology
2008-2013
University of Mumbai
2008-2012
Abstract The carbonylative Suzuki coupling reaction of aryl boronic acid with different and heteroaryl iodides was carried out to synthesize various unsymmetrical biaryl ketones by using Pd/C as an efficient, heterogeneous reusable catalyst. catalyst exhibits remarkable activity, its reusability tested up four consecutive cycles. is applicable for having steric electronic properties. It provides good excellent yield the desired products. developed protocol advantageous regard ease in...
Abstract An efficient palladium catalyst supported on fibrous silica nanospheres (KCC‐1) has been developed for the hydrogenation of alkenes and α,β‐unsaturated carbonyl compounds, providing excellent yields corresponding products with remarkable chemoselectivity. Comparison (high‐resolution TEM, chemisorption) analogous mesoporous (MCM‐41, SBA‐15) silica‐supported Pd nanocatalysts prepared under identical conditions, demonstrates advantage employing KCC‐1 morphology versus traditional...
Abstract Gold nanoparticles (Au NPs) of different sizes were supported on fibrous silica nanospheres (KCC‐1) by various methods. The size and the location Au NPs support found to depend preparation method. KCC‐1‐supported thoroughly characterized using HR‐TEM, XRD, X‐ray photoelectron spectroscopy, UV, Brunauer–Emmett–Teller surface area measurements applied in catalysis for oxidation CO. catalytic performance is discussed relation morphological properties KCC‐1.
An highly efficient PS-Pd-NHC catalytic system has been developed for chemoselective conjugate reduction of α,β-unsaturated carbonyl compounds providing good to excellent conversion with remarkable chemoselectivity (up 100%). The protocol is more advantageous due use HCOONa as hydrogen source, environmentally benign water solvent and effective catalyst recyclability.
The film prepared using a blend of hydroxypropyl methyl cellulose (HPMC) and polyvinyl alcohol (PVA) was investigated for immobilization Rhizopus oryzae lipase. These immobilized lipase films were characterized combination techniques like SEM, TGA, FT-IR, Karl Fischer titration analysis. biocatalyst subjected to transesterification reaction benzyl with vinyl acetate optimized various parameters such as effect support, molar ratio, solvent, concentration biocatalyst, time temperature....
A well-defined silica-supported monoalkylated tungsten dioxo complex [(≡Si–O−)W(═O)2(CH2–tBu)] was prepared by treatment of highly dehydroxylated silica (SiO2-700: treated at 700 °C under high vacuum) with an ionic precursor [NEt4][W(═O)3(CH2–tBu)]. The identity the resulting neutral surface established means elemental microanalysis and spectroscopic studies (IR, solid-state NMR, Raman, X-ray absorption spectroscopies). supported found to act as a precatalyst for self-metathesis 1-octene in...
Efficient catalytic conversion of alkanolamine to carbamate using CO 2 via carbonylation, facilitated by a Zn 0.1 CeO nanorod catalyst.
Abstract The nucleophilic substitution reaction of secondary alcohols and hydroamination alkenes with amides, sulfonamides, carbamates, amines using Amberlyst‐15 immobilized in [Bmim][BF 4 ] (1‐butyl‐3‐methylimidazolium tetrafluoroborate) ionic liquid as an efficient recyclable reagent is described. solvent effect prominent the reaction, desired products are obtained good to excellent yield. protocol advantageous due ease handling reagents, simple work‐up procedure, environmentally benign...
A highly efficient protocol for the alkylation of phenols and anti-Markovnikov addition thiols with various alkenes has been developed using a Brønsted acidic ionic liquid, N-methyl-2-pyrrolidone hydrogen sulfate [NMP]+HSO4−, under solvent free conditions. The methodology offers appreciable advantages respect to excellent yield, short reaction time high regioselectivity. C–C C–S bond formation achieved metal
A novel potential controllable, template free, electrodeposition/synthesis of palladium nanoparticles on an electrode surface as well in the bulk electrolyte using ionic liquid cum stabilizer is reported for first time. The present method preparation advantageous it eliminates requirement additional stabilizers or capping agents. prepared are characterized by different techniques such TEM, SEM, EDAX and XPS analyses. These exhibited high catalytic activity Suzuki coupling reaction...
Synthesis, structure, and olefin metathesis activity of a surface complex [(≡Si-O-)W(═O)(CH3)2-ImDippN] (4) (ImDipp = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-iminato) supported on silica by organometallic chemistry (SOMC) approach are reported. The reaction N-silylated 2-iminoimidazoline with tungsten(VI) oxytetrachloride generated the tungsten oxo imidazolin-2-iminato chloride [ImDippNW(═O)Cl3] (2). This was grafted partially dehydroxylated pretreated at 700 °C (SiO2-700) to afford...
In this study, we introduce a hierarchical core–shell ZSM-5@SiO2 zeolite catalyst to explore its effects on the catalytic cracking of heavy atmospheric gas oil into olefins and how water/oil ratio influences process. The modified ZSM-5 catalysts were characterized, employing suite techniques, including BET, SEM, HR-TEM, XRD, NH3-TPD, both before after steaming treatment. parent zeolite, encapsulated by 24 nm thin amorphous-SiO2 layer, undergoes significant physical changes upon steaming,...
Abstract We investigated the conversion of light paraffinic naphtha (C5‐C6) into BTX (benzene, toluene, and xylenes) aromatics using 1.0 wt % Pt‐M/ZSM‐5 (modifier M=1 wt% Zn, 2 Fe, La, Ga) prepared wet‐impregnation method. The effects Pt modifier on conversion, yield aromatic selectivity xylene, C9+ aromatics) were studied in fixed‐bed flow reactor atmospheric pressure, at 550 °C, WHSV h −1 . Catalytic efficiency modified or Pt‐M ZSM‐5 catalysts has been equated to conventional [Si/Al =30]...