The infrared spectrum (IR) characteristic peaks of amide I, II, and III bands are marked as or peptide peaks. Through the nuclear magnetic resonance study, N-methylacetamide has been determined to have six fine components, which include protonation, hydration, hydroxy structures. Then independent IR every component in is calculated by using density functional theory quantum chemistry method, contribution each analyzed. results this research can help explain formation spectrum, positive...

Abstract Rationally designing active and durable catalysts for the oxygen evolution reaction (OER) is of primary importance in water splitting. Perovskite oxides (ABO 3 ) with versatile structures multiple physicochemical properties have triggered considerable interest OER. The leaching A site cations can create nanostructures amorphous motifs on perovskite matrix, thus facilitating OER process. However, selectively dissolving simultaneously obtaining more derived from B remains a great...

Abstract An efficient and cost-effective oxygen evolution reaction (OER) electrocatalyst is key for electrochemical energy generation storage technologies. Here, the rational design in situ formation of an antiperovskite-based hybrid with a porous conductive Cu 1− x NNi 3− y ( represent defect) core amorphous FeNiCu (oxy)hydroxide shell reported as promising water oxidation electrocatalyst, showing outstanding performance. Benefiting from unique advantage core–shell structure, well...

NAC (NAM-ATAF1, 2-CUC2) family members play important roles in various environmental responses. Here, we cloned a full-length gene (954 bp) from Solanum lycopersicum (SlNAC1). This belonged to ATAF subfamily which included ATAF1 and ATAF2 of Arabidopsis thaliana. SlNAC1 expression was induced by chilling stress (4°C), heat (40°C), high salinity, osmotic mechanical wounding. transcripts were enhanced after application abscisic acid, methyl jasmonate, salicylic gibberellin, ethylene, viologen...

Abstract We report a unique strategy for the development of H 2 O ‐dependent cytochrome P450BM3 system, which catalyzes monooxygenation non‐native substrates with assistance dual‐functional small molecules (DFSMs), such as N ‐(ω‐imidazolyl fatty acyl)‐ l ‐amino acids. The acyl amino acid group DFSM is responsible bounding to enzyme an anchoring group, while imidazolyl plays role general acid–base catalyst in activation . This system affords best peroxygenase activity epoxidation styrene,...

H₂O₂-dependent epoxidation of unfunctionalized styrenes is achieved with high (<italic>R</italic>)-enantioselectivity and moderate to excellent TONs by combining site-mutated variants cytochrome P450BM3 monooxygenase a dual-functional small molecule (DFSM).

The direct cross-couplings of aryl sulfonium salts with halides could be achieved by using nickel as a reaction catalyst. reactions proceeded efficiently via C-S bond activation in the presence magnesium turnings and lithium chloride THF at ambient temperature to afford corresponding biaryls moderate good yields, potentially serving an attractive alternative conventional cross-coupling employing preprepared organometallic reagents.

A straightforward cross-coupling of aryl thioether with bromide the aid nickel salt, magnesium, and lithium chloride in tetrahydrofuran at ambient temperature was accomplished. The one-pot reactions proceeded efficiently via C-S bond cleavage to produce desired biaryls modest good yields, avoiding use pregenerated or commercial organometallic reagents.

The activation of molecular hydrogen is a key process in catalysis. Here, we demonstrate how polyoxometalate (POM)-based heterogeneous compounds functionalized with Platinum particles activate H2 by synergism between spillover mechanism and electron-proton transfer the POM. This interplay facilitates selective catalytic reduction olefins nitroarenes high functional group tolerance. A family polyoxotungstates covalently boronic acids reported. In solid-state, are held together non-covalent...

Biothiols including cysteine (Cys), homocysteine (Hcy), and glutathione (GSH) are crucial in maintaining the redox balance body, metabolism transportation of biothiols rely on coreaction diverse proteins enzymes. The abnormal concentrations closely associated with many diseases. However, due to same active reaction site sulfydryl group biothiols, it is inevitable bear a confused signal mutual influence both nonselective detection discriminate detection, which presents serious challenge...

The precise design of catalytic metal centers with multiple chemical states to facilitate sophisticated reactions involving multimolecular activation is highly desirable but challenging. Herein, we report an ordered macroporous catalyst heterovalent pair (HMP) sites comprising CuII–CuI on the basis a microporous metal–organic framework (MOF) system. This HMP proximity dual copper sites, whose distance controlled ∼2.6 Å, macropore surface exhibits co-activation behavior ethanol at CuII and...

The Arabidopsis transcription factor WUSCHEL-related homeobox 14 (AtWOX14) plays versatile roles in plant growth and development. However, its biochemical specificity of DNA binding, genome-wide regulatory targets, how these are affected by methylation remain uncharacterized. To clarify the biochemistry underlying function AtWOX14, using recently developed 5mC-incorporation strategy, this study performed SELEX DAP-seq for AtWOX14 both presence absence cytosine methylation, systematically...

Low‐cost Cu2O with a suitable band gap holds great potential for solar utilization. However severe photocorrosion and weak CO2 capture capability have significantly hindered their application in artificial photosynthesis. Herein, polyoxometalate (POM)‐etching situ growth of metal‐organic framework (MOF) can simultaneously incorporate electron‐sponge HKUST protective layer into Cu2O. The resulting ternary composites Cu2O@POM@HKUST‐n (POM = PMo12O40 PW12O40) dual hetero‐interfaces efficiently...

Boron compounds are well-known electrophiles. Much less known their nucleophilic properties. By recognition of the nucleophilicity B-H bond, formation mechanism octahydrotriborate (B3H8-) was elucidated on bases both experimental and computational investigations. Two possible routes from reaction BH4- THF·BH3 to B3H8- were proposed, involving B2H6 intermediates. The two pathways consist a set complicated intermediates, which can convert each other reversibly at room temperature be...

The studies of geometrical structures, thermal stabilities, redox properties, nonlinear responses and optoelectronic properties have been carried out on a series novel ferrocenyl (Fc) chromophores with the view assessing their switchable tailorable second order optics (NLO). use constant Fc donor 4,4′-bipyridinium acceptor varied conjugated bridges makes it possible to systematically determine contribution organic connectors chromophore optical activities. structures reveal that both...

The site-specific incorporation of deuterium (D) into small molecules is frequently used to access isotopically labeled compounds with broad utility in many research areas, such as drug development, mechanistic studies, and NMR analyses. Nevertheless, the deuteration a stereocenter an enantioselective manner, which could slow metabolism improve bioavailability bioactive molecules, remains challenging owing lack established catalytic methods. Here, we report asymmetric α-deuteration strategy...

We report the selective hydroxylation of small alkanes with H2O2 catalyzed by an artificial P450 peroxygenase system generated from engineered cytochrome P450BM3 variants in assistance dual-functional molecule (DFSM), which DFSM acts as a general acid–base co-catalyst for activating H2O2. This exhibited comparable catalytic turnover number (TON) to fungal AaeUPO, only known H2O2-dependent natural alkane hydroxylase. Moreover, when compared evolved/engineered NADPH-dependent variants, current...

The aggregation of molecular metal oxides into larger superstructures can bridge the gap between compounds and solid-state materials. Here, we report that functionalization polyoxotungstates with organo-boron substituents leads to giant polyoxometalate-based nanocapsules dimensions up 4 nm. A "lock key" mechanism enables site-specific anchoring aromatic organo-boronic acids metal-functionalized Dawson anions [M

Rechargeable Li-CO2 batteries have been studied extensively as an attractive strategy for simultaneous energy storage and CO2 fixation to address the global environmental crisis. However, state-of-the-art systems still suffer from unsatisfactory performance. Here, we successfully exfoliated quinone-based covalent organic frameworks (COFs) into large-scale ultrathin MnO2/2,6-diaminoanthraquinone-2,4,6-triformylphloroglucinol (DQTP)-COF-nanosheet (NS) hybrid materials. The obtained nanosheets...

Despite being one of the most world's widely used and mass-produced compounds, bisphenol A (BPA) has a wide range toxic effects. Bisphenol P (BPP), an alternative to BPA, been detected in many foods. The effects BPP dietary exposure on gut microbiota intestinal barrier were unclear. We designed three batches animal experiments: first studied mice exposed (30 µg/kg BW/day) for nine weeks found that they gained weight developed dysbiosis microbiota. second, using typical human levels (L, 0.3...

Applications of the peroxidase activity cytochrome P450 enzymes in synthetic chemistry remain largely unexplored. We present herein a protein engineering strategy to increase P450BM3 for direct nitration aromatic compounds and terminal aryl-substituted olefins presence dual-functional small molecule (DFSM). Site-directed mutations key active-site residues allowed efficient regulation steric effects limit substrate access and, thus, significant decrease monooxygenation activity. Nitration...

Abstract Defect engineering is a key chemical tool to modulate the electronic structure and reactivity of nanostructured catalysts. Here, it reported how targeted introduction defect sites in 2D palladium metallene nanostructure results highly active catalyst for alkaline oxygen reduction reaction (ORR). A defect‐rich WO x MoO modified Pd (denoted: D‐Pd M) synthesized by facile scalable approach. Detailed structural analyses reveal presence three distinct atomic‐level defects, that are...

An efficient and convenient iron-catalyzed protocol has been developed for the synthesis of substituted pyrrolo[1,2-a]quinoxalines from 1-(N-arylpyrrol-2-yl)ethanone O-acetyl oximes through N-O bond cleavage intramolecular directed C-H arylation reactions in acetic acid.