The catalytic properties of physical mixtures Ni particles (100–200 nm) with nanoparticles anatase TiO2 (TiO2-A), ZrO2, Al2O3, rutile (TiO2-R), and CeO2 were investigated for the hydrodeoxygenation (HDO) guaiacol. High selectivities to phenolics obtained only mixed (Ni TiO2-A), while saturated hydrocarbons main products other supports. By thermal treatment in hydrogen gas at 300 °C or higher subsequently separating large from TiO2-A a magnet, it was further discovered that there migration...

Gold nanoparticles on a number of supporting materials, including anatase TiO2 (TiO2-A, in 40 nm and 45 μm), rutile (TiO2-R), ZrO2, Al2O3, SiO2 , activated carbon, were evaluated for hydrodeoxygenation guaiacol 6.5 MPa initial H2 pressure at 300 °C. The presence gold the supports did not show distinguishable performance compared to that alone conversion level product distribution, except TiO2-A-40 nm. lack marked catalytic activity other than suggests Au are catalytically active these...

The hydrosilylation reaction is one of the largest-scale applications homogeneous catalysis, and Pt catalysts have been widely used in this for commercial manufacture silicon products. However, result considerable problems, such as undesired side reactions, unacceptable catalyst residues disposable platinum consumption. Here, we synthesized electron-deficient single atoms supported on humic matter (Pt1 @AHA_U_400), was which showed super activity (turnover frequency high 3.0×107 h-1 )...

During the past decade, photo- and electrochemical reactions proceeding via single-electron-transfer (SET) triggered radical pathways have emerged as an indispensable strategy for efficient formation of chemical bonds.

Single-atom catalysts have become a popular choice in various catalysis applications, as they take advantages of both homogeneous (e.g., high efficiency) and heterogeneous easy catalyst recovery). The atom support plays an indispensable role anchoring atomic species interplaying with them for ultimate catalytic performance. Therefore, development new materials superior is great importance. Here the synthesis carbon nanofibers based on reaction between phosphorus pentoxide (P2O5)...

Diketones are ubiquitous blocks for organic synthesis. This work shows a highly active catalyst the production of diketone 1-hydroxyhexane-2,5-dione (HHD) by hydrogenation 5-hydroxymethylfurfural (5-HMF), biobased platform chemical. Half-sandwich Cp*Ir complexes with ortho-hydroxyl group functionalized bipyridine ligands were synthesized and found to exhibit remarkably high catalytic activity this reaction in acidic water. The HHD formation rate was further increased when modified an...

Subarachnoid anesthesia is the primary anesthetic method for elective cesarean section surgery, characterized by rapidly taking effect and reliable analgesia. However, subarachnoid prone to cause a high block level, resulting in incidence of maternal hypotension. How reduce hypotension under practical problem that needs be solved urgently clinical practice. This prospective cohort study was performed at Nantong Maternal Child Health Care Hospital China between January July 2023. compared...

Abstract We report the synthesis of bis(hydroxylmethylfurfuryl)amine (BHMFA) from 5‐hydroxymethylfurfural (5‐HMF) by reacting 5‐HMF with primary amines in presence homogeneous Ru II catalysts having sterically strained ligands. BHMFA is a group furan‐based monomers that offer great potential to form functional biopolymers tunable properties. A range amines, such as aliphatic and benzyl are readily converted corresponding good yields. The reaction proceeds through reductive amination amine...

The synthesis of pyrrolidinones from reductive amination levulinic acid (LA) with primary amines is reported. Pyrrolidinones have various applications such as surfactants, pharmaceutical intermediates, dispersants, and solvents. half-sandwich Cp*Ir complex (Cp* 1,2,3,4,5-pentamethylcyclopenta-1,3-diene) coordinated by bipyridine ligand bearing both dimethylamino ortho-hydroxyl groups showed high catalytic activity for the LA. A range amines, aromatic benzyl were readily converted to...

Abstract While numerous single atoms stabilized by support surfaces have been reported, the synthesis of in-situ reduced discrete metal weakly coordinated and in liquid media is a more challenging goal. We report genesis mononuclear electron deficient Pt 1 (0) reducing H 2 PtCl 6 polydimethylsiloxane-polyethylene glycol (PDMS-PEG) (Pt @PDMS-PEG). UV–Vis, far-IR, X-ray photoelectron spectroscopies evidence reduction . CO infrared, 195 13 C NMR provide strong (0), existing as pseudo-octahedral...

Comprehensive Summary Functionalized free radical addition/cyclization reactions represent an efficient way for introducing new functionality or coupling fragments to molecules. Ynones are good regional selectivity acceptors in organic synthesis, and many of bio‐relevant cyclic compounds could be easily obtained by direct cyclization reaction. Here, we report a photocatalytic cascade addition biaryl ynones, the divergent synthesis privileged carbon cycles. Additionally, further...

Abstract Surface electromyography (sEMG) is a kind of valuable bioelectric signal and very potential in the field human–machine interaction. Ideal interactions require sEMG based patterns recognition not only with high accuracy but also good rapidity. However, too much real-time feature-related computation will greatly slow down interaction, especially for multichannel sEMG. To decrease time consumption, paper formulates feature reduction as an optimization problem, develops double-phases...

In fine-tuning large language models (LLMs), conserving computational resources while maintaining effectiveness and improving outcomes within the same constraints is crucial. The Low-Rank Adaptation (LoRA) strategy balances efficiency performance in by reducing number of trainable parameters costs. However, current advancements LoRA might be focused on its methodologies, with not as much exploration expected into further compression LoRA. Since most LoRA's still superfluous, this may lead to...

Abstract Obtaining reduced discrete metal atoms that are stable in liquid solvents by in‐situ reduction of an ionic precursor has been a challenge until recently. A surfactant polydimethylsiloxane‐polyethylene glycol (PDMS‐PEG) enabled the synthesis platinum (Pt 1 ) reducing Pt(IV) and Pt(II) salts. Here we report successful preparation mononuclear crown ether, [15]crown‐5, as structurally much simpler solvent, prepared Pt @[15]crown‐5 was demonstrated for ultra‐high catalytic activity...