A5037215352- Nanomaterials for catalytic reactions
- Asymmetric Hydrogenation and Catalysis
- Organometallic Complex Synthesis and Catalysis
- Catalytic Processes in Materials Science
- Nanocluster Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Catalytic Cross-Coupling Reactions
- Catalysis for Biomass Conversion
- Lanthanide and Transition Metal Complexes
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Ammonia Synthesis and Nitrogen Reduction
- Synthesis and Properties of Aromatic Compounds
- Crystallography and molecular interactions
- Carbon dioxide utilization in catalysis
- Magnetism in coordination complexes
- Agricultural and Rural Development Research
- Livestock Management and Performance Improvement
Ondokuz Mayıs University
2020
Colorado State University
2010-2015
Middle East Technical University
2006
Determining the true, kinetically dominant catalytically active species, in classic benzene hydrogenation system pioneered by Maitlis and co-workers 34 years ago starting with [RhCp*Cl(2)](2) (Cp* = [η(5)-C(5)(CH(3))(5)]), has proven to be one of most challenging case studies quest distinguish single-metal-based "homogeneous" from polymetallic, "heterogeneous" catalysis. The reason, this study will show, is previous failure use proper combination of: (i) operando spectroscopy determine...
Agglomerative sintering of an atomically dispersed, zeolite Y-supported catalyst, Ir1/zeolite Y, formed initially from the well-characterized precatalyst [Ir(C2H4)2]/zeolite Y and in presence liquid-phase reactants, was monitored over three cycles 3800 turnovers (TTOs) cyclohexene hydrogenation at 72 °C. The catalyst evolved sintered during each cycle, even relatively mild temperature °C plus H2 reactants cyclohexane solvent. Post catalysis, resultant characterized by extended X-ray...
Quantitative catalyst poisoning studies are of fundamental interest and importance because (a) knowledge the number true active sites is required for calculation turnover frequency = (moles product)/(moles actual sites)(time), (b) quantitative proving to be a key, piece data en route distinguishing single metal (M1), small cluster (e.g., M4), or nanoparticle (Mn) catalysis. In evidence latter point, experiments using 1,10-phenanthroline as poison proved crucial in recent identification Rh4...
"Weakly ligated/labile ligand" nanoparticles, that is nanoparticles where only weakly coordinated ligands plus the desired catalytic reactants are present, of fundamental interest. Described herein a catalyst system for benzene hydrogenation to cyclohexane consisting "weakly Ir(0) and aggregates dry-HCl formed in situ from commercially available [(1,5-COD)IrCl]2 40 ± 1 psig (∼2.7 atm) H2 at 22 0.1 °C. Multiple control other experiments reveal following points: (i) this quite active with TOF...
This work addresses the question of what is true catalyst when beginning with a site-isolated, atomically dispersed precatalyst for prototype catalytic reaction cyclohexene hydrogenation in presence cyclohexane solvent: nature zeolite-supported, [Ir(C2H4)2]/zeolite Y retained, or are possible alternatives including Ir4 subnanometer clusters larger, Ir(0)n, nanoparticles actual catalyst? Herein we report (a) kinetics reaction; (b) physical characterizations used catalyst, extended X-ray...
Determining the kinetically dominant catalyst in a given catalytic system is forefront topic catalysis. The [RhCp*Cl2]2 (Cp* = [η5-C5(CH3)5]) pioneered by Maitlis and co-workers classic precatalyst from which homogeneous mononuclear Rh1, subnanometer Rh4 cluster, heterogeneous polymetallic Rh(0)n nanoparticle have all arisen as viable candidates for true hydrogenation catalyst, depending on precise substrate, H2 pressure, temperature, concentration conditions. Addressed herein question of...
Acryloyl and vinyl monomers functionalized with a chiral oxazolidinone auxiliary have been successfully polymerized in stereospecific fashion to highly isotactic, optically active polymers, through either the previously established isospecific coordination polymerization (for acryloyl monomers) or novel cationic monomers). Specifically, conjugated acryloyloxazolidinones, N-acryloyl-(R S)-4-phenyl-2-oxazolidinone [(R S)-AOZ], are readily by ansa-zirconocenium catalysts, (R,R-, S,S-,...
Reported herein is the synthesis of previously unknown [Ir(1,5-COD)(μ-H)](4) (where 1,5-COD = 1,5-cyclooctadiene), from commercially available [Ir(1,5-COD)Cl](2) and LiBEt(3)H in presence excess 78% initial, 55% recrystallized, yield plus its unequivocal characterization via single-crystal X-ray diffraction (XRD), absorption fine structure (XAFS) spectroscopy, electrospray/atmospheric pressure chemical ionization mass spectrometry (ESI-MS), UV-vis, IR, nuclear magnetic resonance (NMR)...
The aim of this study was to determine the relations some affecting factors with milk production in Anatolian buffalo enterprises Samsun province, Turkey. questionnaires were applied by interviews thirty nine farmers those selected random sampling method. Effects experience (EF) and education level (EL) farmer, number milking animal (NM), concentrate feeding application (CF), weaning period (WP), frequency per day (MP), udder disinfection premilking (UDP) on daily yield (DMY) found be...