- Tungsten‐Doped L10‐PtCo Ultrasmall Nanoparticles as High‐Performance Fuel Cell CathodeThe commercialization of proton exchange membrane fuel cells (PEMFCs) relies on highly active and stable electrocatalysts for oxygen reduction reaction (ORR) in acid media. The most successful catalysts for this reaction are nanostructured Pt‐alloy with a Pt‐skin. Here, we report the synthesis of ultrasmall and ordered L1 0 ‐PtCo nanoparticle ORR catalysts further doped with a few percent of transition metals (i.e., W, Ga, and Zn). Compared to
- Biased Lewis Pair: A General Catalytic Approach to Ether‐Ester Block Copolymers with Unlimited SequencesCascade and sequences‐controlled synthesis of biomacromolecules achieved in nature is often impractical for synthetic polymers due to irreversible monomer enchainment order. Typically, polymerizing epoxide after cyclic ester remains a major challenge, though their block copolymers have been extensively studied and used for decades. Here we report a simple catalytic approach based on metal‐free Lewis pair that breaks such a limit. When Lewis acid
- Carbene‐Catalyzed Desymmetrization and Direct Construction of Arenes with All‐Carbon Quaternary Chiral CenterMulti‐substituted arenes such as indanes with attached all‐carbon quaternary centers are unique scaffolds in synthetic functional molecules and sophisticated natural products. A key challenge in preparing such molecules lies in the enantioselective installation of the challenging carbon quaternary centers. Conventional methods in this direction include asymmetric substitution reactions and substrate‐controlled cyclization reactions. These reactio
- Pillar[5]arene Stabilized Silver Nanoclusters: Immense Stability and Luminescence Enhancement Induced by Host‐Guest InteractionsHerein, we report the synthesis of a new class of functional silver nanoclusters (AgNCs) capped with pillar[5]arene (P5) based host ligands. These NCs are readily prepared via direct synthesis or ligand exchange synthesis and are stable at room temperature for over 4 months. The pillar[5]arene stabilized NCs (Ag29(LA‐P5)12(TPP)2) endorse reversible host‐guest interactions with neutral alkylamines and cationic quaternary ammonium guests. This resu
- Edge Capping of 2D‐MXene Sheets with Polyanionic Salts To Mitigate Oxidation in Aqueous Colloidal SuspensionsStability by capping: MXenes generally tend to oxidize when stored as a colloid in water at ambient conditions. Capping the edges of individual MXene flakes by polyanions, however, significantly decreases the rate of oxidation, and makes long‐term storage of MXene possible. This is important because it renders solution processing of MXenes scalable and facile. Abstract MXenes have shown promise in myriad applications, such as energy
- Cyclic (aryl)(amido)carbenes: NHCs with Triplet‐like ReactivityThe synthesis and study of a library of cyclic (aryl)(amido)carbenes (CArAmCs), which represent a class of electrophilic NHCs that feature low calculated singlet−triplet gaps (Δ E ST = 19.9 kcal/mol; B3LYP/def2‐TZVP) and exhibit reactivity profiles expected from triplet carbenes, are described. The electrophilic properties of the CArAmCs were quantified by analyzing their respective selenium adducts, which exhibited the largest downfield 77
- Preparation of Polyfunctional Biaryl Derivatives by Cyclolanthanation of 2‐Bromobiaryls and Heterocyclic Analogs Using nBu2LaCl·4LiClVarious aryl‐ and heteroaryl‐substituted 2‐bromobiaryls are converted to cyclometalated lanthanum intermediates by reacting 2‐bromobiaryls with nBu2LaCl·4LiCl. These resulting lanthanum‐heterocycles are key intermediates for the facile preparation of functionalized 2,2'‐diiodobiaryls, silafluorenes, fluoren‐9‐ones, phenanthrenes and their related heterocyclic analogs. X‐ray absorption fine structure (XAFS) spectroscopy was used to rationalize the
- Magnesium cyanide or isocyanide?Preference for the binding mode of the CNˉ ligand to Mg, Mg‐CN or Mg‐NC, is investigated. A monomeric Mg complex with a terminal CN ligand was prepared using the dipyrromethene ligand MesDPM which succesfully blocks dimerization. While reaction of (MesDPM)MgN(SiMe3)2 with Me3SiCN gave the coordination complex (MesDPM)MgN(SiMe3)2∙NCSiMe3, reaction with (MesDPM)Mg(nBu) led to (MesDPM)MgNC∙(THF)2. A Mg‐NC/Mg‐CN ratio of circa 95/5 was established by
- Acyl Directed ortho‐Borylation of Anilines and C7 Borylation of Indoles using just BBr3Indoles are privileged heterocycles found in many biologically active pharmaceuticals and natural products. However, the selective functionalization of the benzenoid moiety in indoles in preference to the more reactive pyrrolic unit is a significant challenge. Herein we report that N‐acyl directing groups enable the C7‐ selective C‐H borylation of indoles using just BBr 3 . This transformation shows some functional‐group tolerance and notably p
- Thermolysis of Noble Metal Nanoparticles into Electron‐Rich Phosphorus‐Coordinated Noble Metal Single Atoms at Low TemperatureNoble metal nanoparticles (MNPs, M=Ru, Rh, Pd) on g‐C3N4 nanosheets can be transformed by reaction with PH3 into supported thermally stabilized phosphorus‐coordinated metal single atoms (MPSAs, M=Ru, Rh, Pd) at 400 °C. For Pd, the single‐atom catalytic sites exist as PdP2 with exceptional activity for the hydrogen evolution reaction. Abstract Noble metal single atoms coordinated with highly electronegative atom
- Enantioselective Radical Addition/Cross‐Coupling of Organozinc Reagents, Alkyl Iodides, and Alkenyl Boron ReagentsA radical hybrid: The dicarbofunctionalization of vinylB(pin) was achieved through the use of a nickel‐based chiral catalyst. The reaction employs alkyl halide and organozinc reagents and can be accomplished with good levels of enantioselectivity in an intra‐ or intermolecular fashion. Abstract A hybrid transition‐metal/radical process is described that results in the addition of organozinc reagents and alkyl halides acro
- Design, Synthesis, and Phenotypic Profiling of Pyrano‐Furo‐Pyridone Pseudo Natural ProductsNot quite natural: Phenotypic profiling of pseudo natural products (NPs) obtained by de novo combination of pyridone‐ and dihydropyran fragments reveals a new class of inhibitors of mitochondrial complex I. Abstract Natural products (NPs) inspire the design and synthesis of novel biologically relevant chemical matter, for instance through biology‐oriented synthesis (BIOS). However, BIOS is limited by the partial cov
- Why Do Five Ga+ Cations Form a Ligand‐Stabilized [Ga5]5+ Pentagon and How Does a 5:1 Salt Pack in the Solid State?Pentacation stories: With the aid of the strong σ‐donor 4‐dimethylaminopyridine (dmap), Ga+ ions receive enough electron density to convert their non‐bonding 4s2 orbitals into fully bonding Ga−Ga molecular orbitals and aggregate. As a result, the pentagonal pentacation [Ga5(dmap)10]5+ forms. It crystallizes with the counterion [Al(ORF)4]− in an almost orthohexagonal AX5 lattice, possibly the aristotype of any
- Oganesson Is a Semiconductor: On the Relativistic Band‐Gap Narrowing in the Heaviest Noble‐Gas SolidsBreaking rank: The electronic structure of the noble‐gas solids of neon to oganesson was investigated by means of relativistic density functional theory and many‐body perturbation theory. This revealed band gaps of 7.1 eV and 1.5 eV for the unknown solids of Rn and Og, meaning that, in stark contrast to all other noble gases, solid Og is a (short‐lived) semiconductor. Abstract Oganesson (Og) is the most recent
- Reactions in the Photocatalytic Conversion of Tertiary Alcohols on Rutile TiO2(110)Breaking ground: The photoreforming of tertiary alcohols on TiO2(110) follows an unexpected reaction channel, selective disproportionation to an alkane and the respective ketone. When the catalyst is decorated with Pt clusters, the overall reaction rate increases. In addition to ketone formation, a new reaction pathway is observed, hydrogen evolution and alkane dimerization. Abstract According to textbooks, tertiary alcohols are inert towa
- Programmed Release of Dihydroartemisinin for Synergistic Cancer Therapy using CaCO3 Mineralized Metal–Organic FrameworkProgrammed delivery: A programmed release nanoplatform of dihydroartemisinin (DHA) was constructed to treat cancer. The DHA is encapsulated within a Fe‐TCPP metal–organic framework coated with a layer of mineralized CaCO3. Upon reaching the tumor, Fe2+‐DHA‐mediated chemodynamic therapy, Ca2+‐DHA‐mediated oncosis therapy, and TCPP‐mediated photodynamic therapy occur simultaneously. Abstract Dihydroa
- Synthesis of Sulfonimidamides from Sulfenamides via an Alkoxy‐amino‐λ6‐sulfanenitrile IntermediateNH and O transfer: Convenient reagents for NH and O transfer allow the direct preparation of NH‐sulfonimidamides from sulfenamides. A wide range of diversely functionalized sulfonimidamides were prepared in high yields using mild reagents in just two steps from commercial starting material. Novel alkoxy‐amino‐λ6‐sulfanenitriles were isolated and their reactivity demonstrated for the first time. Abstract Sulfo
- Merging Regiodivergent Catalysis with Atom‐Economical Radical ArylationIndolines and tetrahydroquinolines are formed from the same substrates by titanocene catalysis. The absolute configuration of the cyclopentadienyl ligand and the inorganic ligand determine the regioselectivity of ring opening and diastereoselectivity of radical arylation in the regiodivergent radical arylation of epoxides. Abstract A titanocene‐catalyzed regiodivergent radical arylation is described that allows access to either enant
- Dearomatization Approach Toward Superbenzoquinone‐Based Diradicaloid, Tetraradicaloid, and HexaradicaloidSuperbenzene! Reported herein is the stepwise dearomatization of a superbenzene molecule to give a series of superbenzoquinones with two, four, and six ketone groups. They have an intrinsic tendency to recover aromaticity and thus show open‐shell di‐/tetra‐/hexaradical characters. They also exhibit geometry‐ and molecular‐symmetry‐dependent electronic properties. Abstract Reported here is the step‐
- Manipulating the Stacking of Triplet Chromophores in the Crystal Form for Ultralong Organic PhosphorescenceUltralong organic phosphorescence (UOP)can be controlled by manipulating the stacking of the triplet chromophores within a crystal form. The stronger the interaction between carbazole chromophores the more favorable the generation of UOP (see 24CPhCz and 34CPhCz in the picture). Weaker interactions between the triplet chromophores, accompanied by strong interactions between benzene units resulted the disappearance of UOP and appearance of therma
- Chemical Patterning in Single Crystals of Metal–Organic Frameworks by [2+2] Cycloaddition ReactionPaint the town red: Upon irradiation of crystals of highly strained metal–organic frameworks (MOFs) with UV light, adjacent olefins in the spacer ligands undergo a [2+2] cycloaddition reaction to produce cyclobutane rings. The presence or absence of guest solvents in the crystal voids modulates this reaction and the final positioning of the cyclobutane rings, resulting in different patterns. Abstract Conventional chemical patterning
- Development of Ubiquitin‐Based Probe for Metalloprotease DeubiquitinasesTrapped: The metalloprotease class of deubiquitinases (DUBs) is vital to many cellular processes, but not much is known about this class because of the lack of specific probes. These metalloenzymes have zinc in their active site that can be trapped with a chelation‐based activity probe. Described here is a chemically synthesized Ub‐based probe containing a zinc chelator that can bind to and pull‐down metalloprotease DUBs from m
- Synthesis of Carboxylic Acids by Palladium‐Catalyzed HydroxycarbonylationThe outstanding stability of the pictured catalyst system (>25 recycling runs in 32 days without measurable loss of activity), which is unprecedented for Pd‐catalyzed hydroxycarbonylations, is showcased in the preparation of an industrially relevant fatty acid. Because of its efficiency and generality, it provides a basis for new cost‐competitive processes for the industrial production of carboxylic acids. Abstract The
- Diketopiperazine Formation in Fungi Requires Dedicated Cyclization and Thiolation DomainsSeemingly extraneous: Diketopiperazines derived from non‐ribosomal peptide synthetases, an important family of fungal virulence factors, do not form spontaneously, as presumed; instead cyclization relies on previously unannotated domains of the synthetase. Abstract Cyclization of linear dipeptidyl precursors derived from nonribosomal peptide synthetases (NRPSs) into 2,5‐diketopiperazines (DKPs) is a crucial step in the biosynth
- Enhanced Raman Scattering by ZnO Superstructures: Synergistic Effect of Charge Transfer and Mie ResonancesSubmicrometer‐sized semiconductor superstructures can be used as a highly efficient surface‐enhanced Raman scattering (SERS)‐active substrate, as described by W. Ji, B. Zhao, and Y. Ozaki et al. in their Communication (DOI: https://doi.org/10.1002/anie.20190728310.1002/anie.201907283). The superstructure could provide a synergistic effect for the SERS enhancement by the coupling of the charge transfer with the Mie resonance, le
- Location of the Spinel Vacancies in γ‐Al2O3A long‐standing debate regarding the structure of γ‐Al2O3 is re‐examined. 17O and 27Al NMR measurements suggest that there are considerably more Al3+ cations at tetrahedral positions than originally thought. The structure of γ‐Al2O3 is more likely to be isostructural with γ‐Fe2O3, with Al3+ vacancies at octahedral rather than tetrahedral positions. These revelations have a bearing on the surface st
- A Stark contrast to modern Earth: Phosphate mineral transformation and nucleoside phosphorylation in an iron and cyanide‐rich Early Earth scenarioOrganophosphates were likely an important class of prebiotic molecules. However, their presence on the early Earth is strongly debated because the low availability of phosphate—generally assumed to have been sequestered in insoluble calcium and iron minerals—is widely viewed as a major barrier to organophosphate generation. Herein, we demonstrate that cyanide (an essential prebiotic precursor), and urea‐based solvents, could promote nucleoside ph
- Transfer and Amplification of Chirality within the 'Ring of Fire' Observed in Resonance Raman Optical Activity ExperimentsWe report extremely strong chirality transfer from a chiral nickel complex to solvent molecules detected as Raman optical activity (ROA). Electronic energies of the complex were in resonance with the excitation laser light. The phenomenon was observed for a wide range of achiral and chiral solvents. For chiral 2‐butanol, induced ROA was even stronger than the natural one. The observations were related to quantum (molecular) plasmon enabling a str
- A Dynamic Hydrogen‐Bonded Azo‐Macrocycle for Precisely Photo‐Controlled Molecular Encapsulation and ReleaseA photoresponsive host–guest system based on hydrogen‐bonded azo‐macrocycles and viologen in slow exchange demonstrates precisely controlled molecular encapsulation and release in a stepwise manner. The results highlight the potential application for more advanced photocontrolled molecular machines. Abstract A light‐responsive system constructed from hydrogen‐bonded azo‐macrocycles demonstrates precisely
- Asymmetric Phosphoric Acid‐Catalyzed Atroposelective Three‐Component Cascade Reaction: Highly Enantioselective Synthesis of Axially Chiral N‐ArylindolesAn efficient organocatalytic atroposelective three‐component cascade reaction of 2,3‐diketoesters, aromatic amines and 1,3‐cyclohexanediones has been developed for the highly enantioselective synthesis of axially chiral N‐arylindoles. The feature of this method is highlighted by using our newly developed second‐generation of chiral spirocyclic phosphoric acids to enable the reactivity and enantioselectivity of the substrates. In addition, this pr
- Defect‐rich adhesive nanozymes as efficient “antibiotics” for enhanced bacterial inhibitionWith intrinsic catalytic activities, nanozymes have emerged as a new generation of “antibiotics” with exciting broad‐spectrum antimicrobial potencies and negligible biotoxicities. However, their antibacterial efficacies are still far from satisfactory due to the lack of bacterial capturing capacity and relatively lower catalytic activity. Herein, for the first time, we report a one‐step strategy to simultaneously promote the binding capacity and
- Colloidal Synthesis and Optical Properties of All‐Inorganic Low‐Dimensional Cesium Copper Halide NanocrystalsLow‐dimensional metal halides have recently attracted extensive attention owing to their unique structure and photoelectric properties. In this work, we report the colloidal synthesis of all‐inorganic low‐dimensional cesium copper halide nanocrystals (NCs) by adopting a hot‐injection approach. Using the same reactants and ligands, but at different reaction temperature, both 1D CsCu2I3 nanorods (NRs) and 0D Cs3Cu2I5 NCs can be prepared. From 1D Cs
- Direct Visualization of Live Zebrafish Glycans via Single‐Step Metabolic Labeling with Fluorophore‐Tagged Nucleotide SugarsSingle‐step fluorescent labeling of glycans in live zebrafish is achieved by the metabolic incorporation of fluorophore‐tagged nucleotide sugars. This protocol avoids the problem of the poor tissue penetration of fluorescent probes associated with well‐established two‐step fluorescent labeling protocols. Abstract Dynamic turnover of cell‐surface glycans is involved in a myriad of biological events, making this
- Catalytic Living Ring Opening Metathesis Polymerisation: The Importance of Ring Strain in Chain Transfer AgentsA recently developed catalytic living ring opening metathesis polymerisation (ROMP) was investigated using a series of reversible chain transfer agents (CTA) carrying either cyclopentene or cyclohexene rings, differing only in ring strain. All cyclopentene derivatives examined showed significantly faster reaction rates than the corresponding cyclohexene derivatives. This resulted in lower molecular weight dispersities and better control of the mo
- Electrochemical Oxidation of 5‐Hydroxymethylfurfural on Nickel Nitride/Carbon Nanosheets: Identified Pathway by in Situ Sum Frequency Generation Vibrational Spectroscopy2,5‐Furandicarboxylic acid, which can replace the petroleum‐based monomeric terephthalic acid to prepare renewable bio‐based plastics because of its similar molecular structure, was obtained from the electrooxidation of 5‐hydroxymethylfurfural (HMF) with the non‐noble metal‐based catalysts. Moreover, combing the biomass oxidation with the hydrogen evolution reaction could not only increase the energy conversion efficiency of an electrolyzer but a
- Towards mechanomagnetics in elastic crystals: insights from [Cu(acac)₂]We predict that the magnetic properties of [Cu(acac)2], an elastically flexible crystal, change dramatically when the crystal is bent. We find that unbent [Cu(acac)2] is an almost perfect Tomonaga‐Luttinger liquid. Broken‐symmetry density functional calculations reveal that the magnetic exchange interactions along the chains is an order of magnitude larger than the interchain exchange. The geometrically frustrated interchain interactions cannot
- Concise Synthesis of the Antiplasmodial Isocyanoterpene 7,20‐DiisocyanoadocianeThe flagship antiplasmodial isocyanoterpene, 7,20‐diisocyanoadociane (DICA), was constructed in ten steps from simple starting materials. An additional important contribution is a solution to the problem of axial nucleophilic methylation of a late‐stage cyclohexanone, and the first selective synthesis and antiplasmodial evaluation of the DICA stereoisomer with both isonitriles equatorial. Abstract The flagship member of the ant
- Stereoselective Synthesis of Trisubstituted Vinylboronates from Ketone Enolates Triggered by 1,3‐Metalate RearrangementAn unprecedented stereoselective synthesis of trisubstituted vinylboronates was reported from the direct borylation of lithium ketone enolates under transition‐metal‐free conditions. The stereospecific C‐O borylation of lithium enolates was triggered by a carbonyl‐induced 1,3‐ metalate rearrangement through C ‐bound boron enolate. DFT calculations and control experiments revealed that the stereoselectivity was controlled by steric hindrance.
- Photoelectrochemical CO2 reduction with a rhenium organometallic redox mediator at semiconductor/aqueous liquid junction interfacesElectrochemical and photoelectrochemical CO2 reductions were carried out with Re(dh‐bipy)(CO)3(OH2) cocatalysts in aqueous electrolytes. Competition between hydrogen evolution and CO2 reduction has been found in electrochemical characterization for both glassy carbon and CuInS2 electrodes. In that situation, the partial current density for CO generation is limited even though the additional potential is applied. However, an electrochemical hydrog
- Deconstructing Oligomer Distributions: Discrete Species and Artificial DistributionsA discrete RAFT library: The separation of an oligo(methyl acrylate) distribution obtained from RAFT polymerization in a discrete oligomeric library is presented. The properties of this library (diffusivity, glass transition temperature and viscosity) are determined. The obtained oligomer library is used to construct artificial oligomer distributions on demand. Abstract The separation of an oligo(methyl acrylate) distribution, obtained fro
- Chemical Functionalization of Nanodiamonds: Opportunities and Challenges AheadNanodiamonds are forever: Nanodiamonds (NDs) are used in a variety of fields spanning from electronics and optics to biomedicine. Controlled surface functionalization can make NDs high‐performant nanomaterials. In this Minireview, different methodologies of synthesis, purification, and surface functionalization as well as biomedical applications are critically discussed. Abstract Nanodiamond(ND)‐based technologies are flourishi
- Conformational Spin Switching and Spin‐Selective Hydrogenation of a Magnetically Bistable CarbeneSwitchable: The spin state (singlet or triplet) of a magnetically bistable carbene is controlled by a remote methoxy group as a conformational switch. This conformational spin switching can be used to study the spin dependence of reactions and has potential applications in the design of novel switchable magnetic materials. Abstract The control of the spin states of molecules opens the path to tuning selectivity in chemical reactions and to
- Birch‐Type Photoreduction of Arenes and Heteroarenes by Sensitized Electron TransferSplitting the work: Energy transfer (EnT) and photoinduced single‐electron transfer (SET) allow the reduction of arenes. Subsequent hydrogen‐atom transfer (HAT) yields the reduced dearomatized products. Abstract The direct reduction of arenes and heteroarenes by visible‐light irradiation remains challenging, as the energy of a single photon is not sufficient for breaking aromatic stabilization. Shown herein is that the en
- Double Negatively Curved C70 Growth through a Heptagon‐Involving PathwayBeautiful curves: Double‐heptagon‐containing C70 with negative curvature was captured in the form of dihept‐C70Cl6 (see structure). Chlorination at the intersection of a heptagon and two adjacent pentagons greatly enlarges the HOMO–LUMO gap, which made dihept‐C70Cl6 isolable by chromatography. The synthesis of dihept‐C70Cl6 offers precious clues with respect to the fullerene formation mechanism in the carbon&#
- Perylene π‐Bridges Equally Delocalize Anions and Cations: Proportioned Quinoidal and Aromatic ContentEqual with different charge: A complete experimental and theoretical study has been carried out for aromatic and quinoidal perylene‐based bridges substituted with bis(diarylamine) and bis(arylimine) groups respectively. Removal of an electron and introduction of an electron leads to a cation and an anion, respectively, and they have remarkably similar characteristics. Abstract A complete experimental and theoretical study has been ca
- Cyclopropanol Warhead in Malleicyprol Confers Virulence of Human‐ and Animal‐Pathogenic Burkholderia SpeciesVirulence factor: The true effector molecules of a disease‐determining biosynthetic gene cluster from diverse pathogenic bacteria were discovered. Polyketides equipped with a cyclopropanol warhead show high chemical reactivity and strong potency in a eukaryotic infection model Caenorhabditis elegans. The chemical relationships between all the complex polyketides were decrypted. Abstract Burkholderia species such as B. mallei and B. p
- Switchable Solvatochromic Probes for Live‐Cell Super‐resolution Imaging of Plasma Membrane OrganizationTargeting, switching, and sensing were combined in one fluorescent probe to achieve the nanoscale cartography of cell plasma membranes. The proposed design is based on a new functionalization strategy of solvatochromic dye Nile Red, which is sensitive to lipid order, and a new membrane‐targeting moiety that controls binding/unbinding‐induced on/off switching for super‐resolution microscopy. Abstract Visualization of the n
- 4.5 V High‐Voltage Rechargeable Batteries Enabled by the Reduction of Polarization on the Lithium Metal AnodeThe interfacial behavior of the quasi‐solid‐state electrolyte layer Li3OCl was investigated with a three‐electrode setup. An ultrathin Li3OCl layer can remarkably reduce the over‐potential of the lithium anode and inhibit solvent decomposition, significantly prolonging the service life of a high‐voltage (4.5 V) lithium metal battery. Abstract Lithium metal is used to achieve high‐energy‐densi
- Dynamic Control of Chiral Space Through Local Symmetry Breaking in a Rotaxane OrganocatalystWe report on a switchable rotaxane molecular shuttle that features a pseudo‐meso 2,5‐disubstituted pyrrolidine catalytic unit on the axle whose local symmetry is broken according to the position of a threaded benzylic amide macrocycle. The macrocycle can be selectively switched (with light in one direction; with catalytic acid in the other) with high fidelity between binding sites located to either side of the pyrrolidine unit. The position of th
- Restriction of Access to the Dark State: A New Mechanistic Model for Heteroatom‐Containing AIE SystemsThe dark side: Restriction of intramolecular motion is the working mechanism of aggregation‐induced emission (AIE). However, it cannot fully explain some heteroatom‐containing systems. Now, a nitrogen‐containing zinc ion probe is chosen as the model compound, two excited states are taken into account, and a mechanism (restriction of access to dark state; RADS) is specified to explain the AIE effect of some heteroatom‐cont
- Exploring Lead‐free Hybrid Double Perovskite Crystals of (BA)2CsAgBiBr7 with Large Mobility‐Lifetime Product toward X‐ray DetectionHalide double perovskites have recently bloomed as the green candidates for optoelectronic applications, such as X‐ray detection. Despite great efforts, the exploration of promising organic‐inorganic hybrid double perovskites toward X‐ray detection remains a blank. Here, for the first time, we present single crystals of the lead‐free hybrid double perovskite, (BA) 2 CsAgBiBr 7 (BA + is n‐butylammonium), featuring the unique 2D multilayered
- Single‐Crystal Cobalt Phosphate Nanosheets for Biomimetic Oxygen Evolution in Neutral ElectrolytesTo improve energy conversion efficiency, the development of active electrocatalysts with similar structural features to photosynthesis II systems (PS‐II) which can efficiently catalyze oxygen evolution reaction (OER) has received great research interest. Herein we design crystalline cobalt phosphate nanosheets as an efficient OER catalyst in neutral media, showing outstanding performance that even outperforms the noble RuO2 benchmark. The correla
- Discovery of the Hedgehog Pathway Inhibitor Pipinib that Targets PI4KIIIßThe Hedgehog (Hh) signaling pathway is crucial for vertebrate embryonic development, tissue homeostasis and regeneration. Hh signaling is upregulated in basal cell carcinoma and medulloblastoma and Hh pathway inhibitors targeting the Smoothened (SMO) protein are in clinical use. However, the signaling cascade is incompletely understood and novel druggable proteins in the pathway are in high demand. We describe the discovery of the Hh‐pathway modu
- Electroreduction of CO2 on Single‐Site Copper‐Nitrogen‐Doped Carbon Material: Selective Formation of Ethanol and Reversible Restructuration of the Metal SitesIt is generally believed that CO2 electroreduction to multi‐carbon products such as ethanol or ethylene may be catalyzed with significant yield only on metallic copper surfaces, implying large ensembles of copper atoms. Here, we report on an inexpensive Cu‐N‐C material prepared via a simple pyrolytic route that exclusively feature single copper atoms with a CuN4 coordination environment, atomically dispersed in a nitrogen‐doped conductive carbon
- Intercalated iridium diselenide electrocatalysts for efficiently pH‐universal overall water splittingDeveloping bifunctional catalysts for both hydrogen and oxygen evolution reactions represents a promising approach to the practical implementation of electrocatalytic water splitting. However, most of the reported bifunctional catalysts are only applicable to alkaline electrolyzer, albeit few has been discovered effective in acidic or neutral media that more appeals to industrial applications. Here, we develop a lithium‐intercalated iridium disel
- All‐Inorganic CsPbX3 Perovskite Solar Cells: Progress and ProspectsThermally stable and able: All‐inorganic CsPbX3 perovskites (X is halide) have attracted attention owing to their thermally stability for photovoltaic applications. This Review presents the various CsPbX3 materials and the challenges as well as perspectives for the future development of CsPbX3 solar cells. Abstract Recently, lead halide‐based perovskites have become one of the hottest topics in photovoltaic research because of
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