Purpose Binder jetting (BJ) process is an additive manufacturing (AM) in which powder materials are selectively joined by binder materials. Products can be manufactured layer-by-layer directly from three-dimensional model data. The quality properties of the products fabricated BJ AM significantly affected parameters. To improve product quality, optimal parameters need to identified and controlled. This research works with 420 stainless steel material. Design/methodology/approach study...

Abstract The Pd‐catalyzed, Cu I −carboxylate‐mediated cross‐coupling reaction of organosulfur compounds with nucleophilic organometallic reagents is known as the Liebeskind–Srogl reaction. Owing to readily available starting materials and neutral conditions, it has become an attractive procedure for formation carbon−carbon bonds, in particular cases which traditional methods had failed. Since seminal work Liebeskind Srogl 2000, this received intense attention from synthetic community. In...

Abstract We report a cooperative catalytic system comprising Pd II complex, XPhos, and the potassium salt of 5‐norbornene‐2‐carboxylic acid that enables use epoxides as alkylating reagents in Catellani reaction, thereby expanding existing paradigm this powerful transformation. The inexpensive acts both mediator base process. This mild, chemoselective, scalable, atom‐economical protocol is compatible with wide variety readily available functionalized aryl iodides epoxides, well terminating...

Abstract Reported is a modular one‐step three‐component synthesis of tetrahydroisoquinolines using Catellani strategy. This process exploits aziridines as the alkylating reagents, through palladium/norbornene cooperative catalysis, to enable Catellani/Heck/aza‐Michael addition cascade. mild, chemoselective, and scalable protocol has broad substrate scope (43 examples, up 90 % yield). The most striking feature this excellent regioselectivity diastereoselectivity observed for 2‐alkyl‐...

Direct alcohol fuel cells (DAFCs) have the potential to provide high power densities for transportation and portable applications. However, widespread use of DAFCs is greatly hindered by lack anode electrocatalysts that are inexpensive, stable, resistant CO poisoning, highly active toward oxidation. One promising approach overcoming these challenges combine transition metal catalysts with oxide supports, such as SiO2, which known enhance oxidation promoting at oxide|metal interfacial regions...

Precise control of electron density at catalyst active sites enables regulation surface chemistry for the optimal rate and selectivity to products. Here, an ultrathin catalytic film amorphous alumina (4 nm) was integrated into a condenser device that enabled tunable depletion from layer correspondingly stronger Lewis acidity. The had following structure: alumina/graphene/HfO2 dielectric (70 nm)/p-type Si. Application positive voltages up +3 V between graphene p-type Si resulted in electrons...

This paper reports the performance of hydrogen evolution reaction (HER) electrocatalysts based on Pt thin film electrodes that are encapsulated by silicon oxide (SiOx) nanomembranes. membrane-coated electrocatalyst (MCEC) architecture offers a promising approach to enhancing stability while incorporating advanced catalytic functionalities such as poison resistance and tunable selectivity. Herein, room-temperature ultraviolet (UV) ozone synthesis process was used systematically control...

As 3C-SiC can transform to other polytype when the temperature is ≥ 2073 K, current physical vapor transport (PVT) method hardly grow wafer-grade due its growth...

The annulation of aryl iodides and epoxides to convergently access valuable 2,3-dihydrobenzofuran scaffolds was developed <italic>via</italic> a Catellani strategy.

To solve the problem that wax appearance temperature (WAT) acquired by conventional method is not suitable and effective to subsurface live crude oil dark oil, a way measure WAT of varying in properties explored using characteristics ultrasonic transmission through media. In measurement with ultrasonic, as dropped, solid crystallized from crude, decline effect would be strengthened during ultrasonic. The head wave frequency changed process; turning point was precipitation could obtained...

A general and practical approach for diverse dealkenylative functionalization of olefin-containing substrates has been developed through the one-pot formation utilization pro-aromatic 1,4-dihydropyridazines using tetrazine as key cycloaddition reagent. Triggered by either excitation or oxidation, targeted C-C bonds in 1,4-dihydropyridazine intermediates could be readily cleaved to generate alkyl radicals subsequent transformations. Diverse carbon-carbon carbon-hetero bond forming protocols,...

This article identifies Pt-oxide interlayers at the buried interface of Si-oxide/Pt thin films and explores their implications for electrocatalysis.

Production of biofuels from biomass resources has received wide attention because the current energy crisis. Recently, significant interest been directed towards selective hydrogenolysis 5-hydroxymethylfurfural (HMF) to produce biofuel 2, 5-dimethylfuran (DMF). In this study, non-noble Ni–Cu catalysts with various Ni/Cu ratios, supported on titanium silicalite-1 (TS-1), were prepared through a solid-phase grinding method and used catalyze HMF DMF under hydrogen atmosphere. The structure...

The acid sites of phosphorus-containing zeosils were probed through a combination solid characterization, density functional theory calculations, and kinetic interrogations, establishing their weakly Brønsted-acidic character. Because the disparity in acid-site strength, P-zeosils catalyzed probe chemistry isopropanol dehydration slower than aluminosilicate zeolites by an order magnitude on active-site basis. Propene selectivity during remained 20–30% higher that aluminosilicates,...

A new and enantioselective total synthesis of the diterpenoid (+)-mutilin is described. Following a Claisen rearrangement approach to construct 6,9-bicycle, transannular [2+2] photocycloaddition ensuing ring-opening reaction were implemented forge characteristic 5–6–8 propellane-like skeleton. Subsequent late-stage alkylations reduction completed synthesis.

Due to the risk of heavy metal pollution in infant milk powder, it is significant establish effective detection methods. Here, a screen-printed electrode (SPE) was modified with nanoporous carbon (NPC) detect Pb(II) and Cd(II) powder using an electrochemical method. Using NPC as functional nanolayer facilitated due its efficient mass transport large adsorption capacity. Linear responses were obtained for Pb (II) range from 1 60 µg L-1 5 70 L-1, respectively. The limit 0.1 1.67 Cd(II)....

Abstract We report a cooperative catalytic system comprising Pd II complex, XPhos, and the potassium salt of 5‐norbornene‐2‐carboxylic acid that enables use epoxides as alkylating reagents in Catellani reaction, thereby expanding existing paradigm this powerful transformation. The inexpensive acts both mediator base process. This mild, chemoselective, scalable, atom‐economical protocol is compatible with wide variety readily available functionalized aryl iodides epoxides, well terminating...

A kinetic investigation of the vapor-phase Hofmann elimination tert-butylamine (TBA) over H-ZSM-5 reveals a carbocation-mediated E1-like mechanism, where isobutene and ammonia are exclusively produced Brønsted acid sites. kinetics is found to be insensitive Al content, varying only with alkylamine carbocation stability (rtertiary > rsecondary rprimary). Under conditions complete TBA surface coverage, experimentally measurable apparent directly equivalent intrinsic rate-determining...

Abstract Reported is a modular one‐step three‐component synthesis of tetrahydroisoquinolines using Catellani strategy. This process exploits aziridines as the alkylating reagents, through palladium/norbornene cooperative catalysis, to enable Catellani/Heck/aza‐Michael addition cascade. mild, chemoselective, and scalable protocol has broad substrate scope (43 examples, up 90 % yield). The most striking feature this excellent regioselectivity diastereoselectivity observed for 2‐alkyl‐...

Fructose-1,6-bisphosphate aldolase (FBA) represents an attractive new antifungal target. Here, we employed a structure-based optimization strategy to discover novel covalent binding site (C292 site) and the first-in-class allosteric inhibitors of FBA from Candida albicans (CaFBA). Site-directed mutagenesis, liquid chromatography–mass spectrometry, crystallographic structures APO–CaFBA, CaFBA–G3P, C157S–2a4 revealed that S268 is essential pharmacophore for catalytic activity CaFBA, L288...

With a resurgence of covalent drugs, there is an urgent need for the identification new moieties capable cysteine bond formation. Herein, we report on N-acylamino saccharin novel reactions with cysteine. Their utility as alternative electrophilic warheads was demonstrated through modification fructose-1,6-bisphosphatase (FBPase), promising target associated cancer and type 2 diabetes. The cocrystal structure title compound W8 bound FBPase unexpectedly revealed that moiety worked electrophile...