Fluorescence emissions in the second near infrared window (NIR‐II) have shown extraordinary advantages for bio‐imaging. However, it’s a big challenge to exploit NIR‐II emitters for gastrointestinal (GI) tract imaging due to fluorescence quenching in digestive microenvironment. Herein, we made an interesting finding that red‐shifted emissions of Au nanoclusters (AuNCs) into NIR‐II region with improved quantum yields (QY) could be achieved by engineering a corona structure of a ribonuclease‐A (RNase‐A)...
Thu Aug 13, 2020 18:20
Pillararenes (PAs) possess many useful features (e.g. rigid, capacious, hydrophobic cavities and exposed functional groups) that have led to a tremendous increase in their popularity since their first discovery in 2008. In this minireview, we have emphasized a progressive scope for the consideration of functionalized PAs and their assembled supramolecular materials utilized in the field of catalysis. We aim to provide a fundamental understanding and mechanism of the role PAs play in catalytic process....
Thu Aug 13, 2020 18:02
19 F magnetic resonance‐based detection coupled with well‐designed inorganic systems shows great promise in biological investigations including metabolic tracking, studies of protein structure and function, molecular imaging, and medical diagnostics, providing low biological background and high specificity of the modality. Two proof‐of‐concept inorganic probes are reported that exploit a novel mechanism for 19 F MR sensing based on converting from low‐spin (S=0) to high‐spin (S=1) Ni 2+ . Activation...
Thu Aug 13, 2020 22:50
The unique B12 unit of crystalline boron experiences step‐wise cleavage of B−B bond and rapidly provides electrons for FeIII reduction to FeII. This boosts the oxidation capability of the Fenton systems remarkably to oxidize a diversity of organic pollutants with exceptional stability. Abstract Generation of hydroxyl radicals in the Fenton system (FeII/H2O2) is seriously limited by the sluggish kinetics of FeIII reduction and fast FeIII precipitation. Here, boron crystals (C‐Boron) remarkably...
Thu Aug 13, 2020 22:00
Herein we present a new viologen‐based radical‐containing metal‐organic framework (RMOF) Gd‐IHEP‐7, which upon heating in air undergoes a single‐crystal‐to‐single‐crystal transformation to generate Gd‐IHEP‐8. Both RMOFs exhibit excellent air and water stability as a result of favorable radical‐radical interactions, and their long‐lifetime radicals result in wide spectral absorption in the range 200‐2500 nm. Gd‐IHEP‐7 and Gd‐IHEP‐8 show excellent activity toward solar‐driven nitrogen fixation, with...
Thu Aug 13, 2020 17:00
Defects in porous boron nitride enable the incorporation of boron atoms to the lattice of supported palladium nanoparticles, creating spatially isolated ensembles of metallic character. Evaluation in the continuous semi‐hydrogenation of 1‐hexyne demonstrates that the modification induced by the carrier can yield unparalleled performance compared to state‐of‐the‐catalysts without the need for introducing further additives. Abstract Chemical modifiers enhance the efficiency of metal catalysts...
Thu Aug 13, 2020 16:59
A nanoscale resolution mass spectrometry imaging technique using micro‐lensed fiber as a laser desorption ion source is proposed. Combining this system with a time‐of‐flight mass spectrometer, we achieved the visualization of drug distribution inside a single cell at the resolution of 300 nm. Abstract The visualization of temporal and spatial changes in the intracellular environment has great significance for chemistry and bioscience research. Mass spectrometry imaging (MSI) plays an important...
Thu Aug 13, 2020 16:55
Electronically active ionenes were realized by integration of naphthalene diimide into a polymer backbone. These conductive polymers have a low degree of crystalline order, show a great processing advantage to remove energy barriers between organic semiconductors and metal electrodes, and afford fullerene‐based, non‐fullerene‐based, as well as ternary organic solar cells with high performance and a maximum efficiency of 16.9 %. Abstract Self‐doping ionene polymers were efficiently synthesized...
Thu Aug 13, 2020 16:54
A detailed mechanistic study on the C(sp2)−C(sp)N reductive elimination from gold(III) complexes is reported herein. The kinetic and computational data from a new family of well‐defined phosphine‐ligated dicyanoarylgold(III) complexes unravel a novel asynchronous concerted reductive elimination process operating in these transformations. Abstract A new family of phosphine‐ligated dicyanoarylgold(III) complexes has been prepared and their reactivity towards reductive elimination has been...
Thu Aug 13, 2020 16:54
A strategy, called polymer transformers, is developed to adaptively reconfigure functional polymer states with the possibility for rejuvenation and reconfiguration into different outputs in new cycles. This is achieved by interdigitating two ATP‐powered enzymatic reaction networks of dynamically polymerizing monomer mixtures into a joint system. Abstract Adaptivity is an essential trait of life. One type of adaptivity is the reconfiguration of a functional system states by correlating sensory...
Thu Aug 13, 2020 16:54
Leupeptin, a broad‐spectrum protease inhibitor, is used worldwide in protein isolation and has been established as a chemical model in autophagy and immunoproteasome research. The leupeptin pathway was identified in gammaproteobacterial pathogens and associated with animal colonization phenotypes. A new type of protease transforms the leupeptins into novel heterotricyclic “pro‐pyrazinones.” Abstract Leupeptin is a bacterial small molecule that is used worldwide as a protease inhibitor....
Thu Aug 13, 2020 16:53
A novel Zn–air battery with two semiconducting PDTB and TiO2 cathodes sandwiching a Zn anode was constructed. The battery is enabled by photo‐excited ORR and OER in the discharging and charging processes, respectively. The resultant discharge voltage of 1.90 V is much higher than the charge voltage of 0.59 V because of the contribution of photo‐energy. Abstract The storage of solar energy in battery systems is pivotal for a sustainable society, which faces many challenges. Herein, a Zn–air...
Thu Aug 13, 2020 16:53
Rhodopsin is the major dim light receptor in vertebrate eyes. Numerous mutations associated with impaired visual cycles are known. The G90D mutation leads to a constitutively active mutant form of rhodopsin that causes congenital stationary night blindness (CSNB). We investigated the consequences of this mutation on the visual cycle, both in terms of structural aspects and dynamic changes. Abstract The RHO gene encodes the G‐protein‐coupled receptor (GPCR) rhodopsin. Numerous mutations...
Thu Aug 13, 2020 16:53
Cryogenic OrbiSIMS decreases molecular fragmentation and expands the chemical space that is amenable to mass spectrometry imaging with high spatial and mass resolution. Semi‐volatile and non‐volatile molecules can now be imaged simultaneously in biological tissues. Abstract OrbiSIMS is a recently developed instrument for label‐free imaging of chemicals with micron spatial resolution and high mass resolution. We report a cryogenic workflow for OrbiSIMS (Cryo‐OrbiSIMS) that improves chemical...
Thu Aug 13, 2020 16:52
An efficient palladium‐catalyzed chlorocarbonylation of aryl (pseudo)halides that gives access to a wide range of carboxylic acid derivatives has been developed. The use of butyryl chloride as a combined CO and Cl source eludes the need for toxic, gaseous carbon monoxide, thus facilitating the synthesis of high‐value products from readily available aryl (pseudo)halides. Abstract An efficient palladium‐catalyzed chlorocarbonylation of aryl (pseudo)halides that gives access to a wide range...
Thu Aug 13, 2020 16:50
Advantages of aptamers and SELEX in diverse research fields are summarized in this Minireview, along with some limitations and possible solutions to them. Furthermore described are future perspectives for aptamer modification with a near‐infinite number of molecular‐modulating elements that will result in more powerful tools in bioscience. Abstract The advent of SELEX (systematic evolution of ligands by exponential enrichment) technology has shown the ability to evolve artificial ligands...
Thu Aug 13, 2020 16:50
A3Sb2Br9 nanoparticles (NPs) with different ratios of Cs and CH3NH3 (MA) were employed in photocatalytic C(sp3)−H bond activation with high conversion rates. It was demonstrated that the octahedron distortion by A‐site cations could affect the electronic properties of A3Sb2Br9 and further influence the photocatalytic activities. Abstract The lead‐free halide perovskite A3Sb2Br9 is utilized as a photocatalyst for the first time for C(sp3)−H bond activation. A3Sb2Br9 nanoparticles (A3Sb2Br9...
Thu Aug 13, 2020 16:50
Access to oxy‐allyl cation equivalents from alkynes by hypervalent iodine reagents is described. The stereoselective transformation of Vinylbenziodoxolones (VBXs) provides aryl enol ethers bearing an allylic ether or ester group and corresponds to an Umpolung of the nucleophilic reactivity of enol ethers. The obtained products are easily transformed into α‐difunctionalized ketones under oxidative conditions. Abstract We report an Umpolung strategy of enol ethers to generate oxy‐allyl cation...
Thu Aug 13, 2020 16:50
This Minireview describes the recent advances of synthetic macrocycle‐based nonporous adaptive crystals for molecular separation and vapochromic application. Abstract The exploitation of new materials for adsorptive separation of industrially important hydrocarbons is of great importance in both scientific research and petrochemical industry. Nonporous adaptive crystals (NACs) as a robust class of synthetic materials have drawn much attention during the past five years for their superior...
Thu Aug 13, 2020 16:49
A carrier‐free drug delivery system is assembled using an amphiphilic drug–chemogene conjugate, which is prepared by conjugating two paclitaxel (PTX) molecules with an floxuridine‐integrated antisense oligonucleotide against P‐glycoprotein (termed chemogene) using a fluorescent dibromomaleimide linker. The PTX–chemogene assembly can effectively reverse drug resistance and inhibit tumor growth. Abstract Combinatorial antitumor therapies using different combinations of drugs and genes are...
Thu Aug 13, 2020 16:48
Perovskite nanocrystals (NCs) are self‐assembled into 2D photonic supercrystals using pre‐patterned polydimethylsiloxane (PDMS) templates and their optical spectra are tunable by varying lattice spacing. These photonic crystals show amplified spontaneous emission (ASE) under lower optical excitation fluences in the near‐IR region due to enhanced multi‐photon absorption caused by light trapping in the photonic crystal. Abstract Perovskite nanocrystals (NCs) have revolutionized optoelectronic...
Thu Aug 13, 2020 16:45
Both surface chemistry and [Ca2+] concentration are shown to play critical roles in dictating the precise spatial occlusion of the guest nanoparticles within calcite crystals. This new insight enables the rational design of patterned nanocomposite crystals via a multi‐step occlusion strategy. Abstract In principle, nanoparticle occlusion within crystals provides a straightforward and efficient route to make new nanocomposite materials. However, developing a deeper understanding of the design...
Thu Aug 13, 2020 16:45
Overcoming the mismatch between the rapid formation of nanoclusters and the slow crystallization of zeolites allows the in situ encapsulation of metal nanoclusters into zeolites in just a few minutes. The resultant Pt/Sn‐ZSM‐5 shows excellent activity and stability in the dehydrogenation propane to propylene. Abstract Encapsulating metal nanoclusters into zeolites combines the superior catalytic activity of the nanoclusters with high stability and unique shape selectivity of the crystalline...
Thu Aug 13, 2020 16:45
Molecular cobalt‐based CO2 electroreduction catalysts achieved the conversion of CO2 into HCOOH as the major product with very low overpotential by tuning the electronic properties of the metal centers using pyridine‐thiolate ligands. Formation of a stable carbonyl complex caused deactivation. The active catalyst is regenerate by re‐oxidation, promoting CO ligand release. Abstract Electrocatalytic CO2 reduction to value‐added products provides a viable alternative to the use of carbon sources...
Thu Aug 13, 2020 16:44
It is shown that the methanol synthesis from syngas with the industrial Cu/ZnO/Al2O3 catalyst at commercially applied conditions is dominated by a methanol‐assisted autocatalytic reaction mechanism. Of the two main reaction products, H2O is strongly inhibiting, whereas CH3OH is beneficial to the reaction rate. Methanol is proposed to open up a faster pathway of surface formate conversion via methyl formate. Abstract Catalytic methanol synthesis is one of the major processes in the chemical...
Thu Aug 13, 2020 16:44
A polarization effect in charge separation and spatial distribution was discovered using photo‐irradiated Kelvin probe force microscopy. Plasmon‐induced surface photovoltage was demonstrated to be varied as a sine‐squared function of polarization angle. Under suitable polarization angle, local charge density and photocatalytic activity can be dramatically enhanced. Abstract Controlling the interaction of polarization light with an asymmetric nanostructure such as a metal/semiconductor heterostructure...
Thu Aug 13, 2020 16:44
A 3D single‐crystal COF with a non‐interpenetrated structure was constructed for the first time. The highly open framework provides a unique matrix‐isolation platform to investigate the intrinsic dynamics of individual AIE moiety. Abstract Growth of covalent organic frameworks (COFs) as single crystals is extremely challenging. Inaccessibility of open‐structured single‐crystal COFs prevents the exploration of structure‐oriented applications. Herein we report for the first time a non‐interpenetrated...
Thu Aug 13, 2020 16:43
Electrofreezing experiments of super‐cooled water with different ions were performed on the charged hemihedral faces of pyroelectric LiTaO3 and AgI crystals. In their Communication (DOI: https://doi.org/10.1002/anie.20200643510.1002/anie.202006435), D. Harries, M. Lahav, I. Lubomirsky et al. demonstrate that HCO3 − ions elevate the icing temperature near the positively charged faces, whereas H3O+ slightly reduces the icing temperature.
Thu Aug 13, 2020 16:43
A rabies virus (RABV) biomimetic drug delivery system (MILB@LR) targeted the treatment of inhibit glioblastoma multiforme (GBM). MILB@LR's blood–brain barrier (BBB) penetration when loaded with the antitumor drug oxaliplatin (OXA) substantially inhibit GBM tumor growth. Abstract The blood–brain barrier (BBB) restricts access to the brain of more than 98 % of therapeutic agents and is largely responsible for treatment failure of glioblastoma multiforme (GBM). Therefore, it is of great importance...
Thu Aug 13, 2020 16:41
Beryllium atoms react with dinitrogen and carbon monoxide mixtures to form the end‐on bonded NNBeCO and side‐on bonded (η2‐N2)BeCO complexes, both of which isomerize to the more stable NBeNCO isomer, showing that the activation of N2 with fully cleaved N−N bond can be achieved by coupling with carbon monoxide via a major group atom. Abstract The reactions of laser‐ablated beryllium atoms with dinitrogen and carbon monoxide mixtures form the end‐on bonded NNBeCO and side‐on bonded (η2‐N2)BeCO...
Thu Aug 13, 2020 16:40
Cu2O cubes of nanometer‐sized dimensions allow the chemical and structural factors that control the selectivity of the CO2 reduction reaction (CO2RR) to be traced. The Faradaic product efficiencies over time can be linked to changes in the chemical state at the surface and bulk and in the catalyst morphology for supported and unsupported nanocubes (S‐NC, U‐NC). Abstract The direct electrochemical conversion of carbon dioxide (CO2) into multi‐carbon (C2+) products still faces fundamental...
Thu Aug 13, 2020 16:39
The development of dearomative functionalization strategies for arenes is intrinsically challenging and remains a largely unsolved synthetic problem owing to the particularly high resonance energy. We have now developed the first catalytic intermolecular hydroalkylative dearomatization of naphthalene derivatives with commercially available α‐amino acids by a photoredox‐neutral process. Abstract An intermolecular hydroalkylative dearomatization of naphthalenes with commercially available...
Thu Aug 13, 2020 16:39
A rapid approach to profile various alkaline phosphatase (ALP) isozymes as important biomarkers in blood via a single‐molecule‐analysis microarray platform is demonstrated. Abstract Alkaline phosphatase (ALP) is an important biomarker, as high levels of ALP in blood can indicate liver disease or bone disorders. However, current clinical blood tests only measure the total concentration of ALP but are unable to distinguish enzyme isotypes. Here, we demonstrate a novel and rapid approach to...
Thu Aug 13, 2020 16:38
A facile one‐pot synthetic strategy was explored to incorporate multiple functionalities into stable zirconium metal–organic layers (MOLs) through the functionalization of Zr6‐BTB (BTB=benzene‐1,3,5‐tribenzoate) layers via secondary ligand pillaring. A metal–phthalocyanine fragment was successfully incorporated into this Zr‐MOL system, giving rise to an ideal platform for the selective oxidation of anthracene. Abstract Intriguing properties and functions are expected to implant into metal–organic...
Thu Aug 13, 2020 16:38
Atomically dispersed Pt embedded in Ti1−x O2 (Pt1 O1/Ti1−x O2) was engineered via a cation‐deficient electrostatic anchorage route. The inherent charge transfer within the Pt−O realm thus evolved the catalytic matrix into the dual Pt−OPt catalytic sites towards high‐efficient and durable hydrogen evolution. Abstract A dual‐site catalyst allows for a synergetic reaction in the close proximity to enhance catalysis. It is highly desirable to create dual‐site interfaces in single‐atom system...
Thu Aug 13, 2020 16:38
NiMn‐based bimetal–organic framework nanosheets are successfully grown on multi‐channel carbon fibers (MCCF/NiMn‐MOFs) as a promising bifunctional oxygen electrocatalyst. The strong synergetic effect of bimetallic nodes as well as the well‐designed hierarchical architecture is unraveled to enable MCCF/NiMn‐MOFs with fast kinetics and robust stability towards efficient oxygen electrocatalysis. Abstract Developing noble‐metal‐free bifunctional oxygen electrocatalysts is of great significance...
Thu Aug 13, 2020 16:38
Fluoroethylene carbonate can form a robust solid‐electrolyte interphase (SEI) on the lithium metal surface. Using fluoroethylene carbonate as the SEI enabler allows relatively stable lithium‐metal battery (LMB) cycling. The solvation number of fluoroethylene carbonate must be greater than or equal to 1 to ensure the formation of a stable SEI. Abstract Despite the exceptionally high energy density of lithium metal anodes, the practical application of lithium‐metal batteries (LMBs) is still...
Thu Aug 13, 2020 16:38
A strategy to interfacially bridge a covalent network within tobacco mosaic virus (TMV) virus‐like particles (VLPs) is presented. T103C‐TMV‐E50C‐A74C shows the highest robustness in assembly capability and structural stability with the largest length for a TMV VLP to date. The robust nature of this TMV VLP allows for reducer‐free synthesis of excellent electrocatalysts for application in harshly alkaline hydrogen evolution. Abstract We present a strategy of interfacially bridging covalent...
Thu Aug 13, 2020 16:36
Two types of intermetalloid cluster architectures are obtained from reactions of binary Zintl anions (Tt2Pn2)2− (Tt=Ge, Sn, Pb; Pn=As, Sb, Bi) with [(PPh3)AuMe], as described by S. Dehnen et al. in their Research Article (DOI: https://doi.org/10.1002/anie.20200810810.1002/anie.202008108): while combinations of heavier atoms lead to reconstruction of the binary precursor to form {[AuTt5Pn3]2}4− (take a left turn), the lightest homologue yields [Au6(Ge3As)(Ge2As2)3]3− with a new supertetrahedral...
Thu Aug 13, 2020 16:33
The functional porous hybrid material aza‐MOF@COF is synthesised through post‐synthesis modification of MOF@COF‐LZU1 by a cycloaddition‐based aza‐Diels–Alder reaction. The aza‐MOF@COF exhibit exhibits high specific capacitance of 20.35 μF cm−2 and an exceptional stack capacitance of 1.16 F cm−3. Abstract Metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) have attracted enormous attention in recent years. Recently, MOF@COF are emerging as hybrid architectures combining...
Thu Aug 13, 2020 16:32
Organometallic treasure hunt: A molecular cobalt catalyst “navigates” the CO2 reduction with phenylsilanes to arrive at each product level individually with high selectivity and activity. This demonstrates the possibility of developing adaptive catalytic systems for the use of carbon dioxide as raw material for chemicals or energy carriers, as detailed by C. Werlé, W. Leitner et al. in their Research Article (DOI: https://doi.org/10.1002/anie.20200446310.1002/anie.202004463).
Thu Aug 13, 2020 16:31
Flavoenzymes catalyze oxidations via hydroperoxide intermediates that result from activation of molecular O 2 . These reactions—such as hydroxylation and halogenation—depend on the additional catalytic activity of functional groups in the peptide environment of the flavin cofactor. We report synthetic flavin catalysts that contain C‐6 amino modifications at the isoalloxazine core and are consequently capable of mediating halogenations outside the peptide surrounding. The catalysts are competent...
Thu Aug 13, 2020 16:30
Single‐luminophore dual thermally activated delayed fluorescence properties were utilized for integrating time‐resolved imaging information. The “planets” in the artwork illustrate biological cells or units of life—the biological microenvironment resembles a cosmic space with countless unknown entities, waiting to be explored by molecular probes with different emission signals. More information can be found in the Research Article by X. Wang, L. Zhu et al. (DOI: https://doi.org/10.1002/anie.20200907710.1002/anie.202009077)....
Thu Aug 13, 2020 16:30
Surfactant‐directed functionalization could serve as a promising tool for enabling targeted modification of two‐dimensional nanomaterials and open up a whole new spectrum of exciting chemistry to be explored, as demonstrated by H. Bayley et al. in their Research Article (DOI: https://doi.org/10.1002/anie.20200572910.1002/anie.202005729). Shining light on the heterogenous reaction of chloroauric acid at the nanosheet–solution interface reveals that the employed surfactant plays a significant role...
Thu Aug 13, 2020 16:30
The design, synthesis, and characterization of two novel nonfullerene acceptors (M8 and M34) based on ladder‐type heteroheptacenes with different heterocycles are reported. Replacing the furan heterocycles with the thiophene heterocycles in the heteroheptacene backbone leads to hypsochromically shifted absorption band and greatly improved carrier transport for the resulting nonfullerene acceptor (M34) although the π‐π‐stacking distances are barely affected. Bulk‐heterojunction polymer solar cells...
Thu Aug 13, 2020 15:19
Mechanoluminescence (ML) materials are attracting increasing interest due to its promising applications in various areas. However, to date, it remains a major challenge to develop a precise and universal route to achieving organic ML materials. Herein, we report the first example that ML can be easily realized in organic piezophotonic host‐guest crystals, under the conditions that neither the host nor the guest is ML‐active. The experimental and theoretical results reveal that, excitons of the host...
Thu Aug 13, 2020 14:55
Bismuth is a promising alternative to magnesium metal anode. It permits non‐corrosive magnesium electrolytes with high oxidative stability, and encourages investigation of high‐voltage cathode materials for magnesium ion batteries (MIBs). An in‐depth understanding of the mechanism of Mg storage in bismuth is crucial for the search of reliable approaches to boost electrochemical performance of MIBs. Here, we present mesoporous bismuth nanosheets as a model to study the charge storage mechanism of...
Thu Aug 13, 2020 13:58
Zeolite Y with a SiO2/Al2O3 ratio (SAR) of 6.35 is hydrothermally synthesized by using a hydroxyl radical assisted route. To further increase the SAR, a dealumination process was performed with citric acid and a subsequent second‐step hydrothermal crystallization, giving an SAR of up to 7.5 while maintaining good crystallinity. Abstract Zeolite Y, with a high SiO2/Al2O3 ratio (SAR), plays an important role in fluidized catalytic cracking processes. However, in situ synthesis of zeolite...
Thu Aug 13, 2020 12:55
Thermally activated delayed fluorescent (TADF) materials, featuring an energy upconversion from triplet to singlet states, are anticipated to overcome triplet‐related losses towards electrically driven organic lasers. Thus far, contributions from triplets to lasing have not yet been experimentally convinced, which should be ascribed to the difficulties in constructing devices with both high triplet‐harvesting ability and strong cavity effect. Here, we experimentally achieve reverse intersystem crossing...
Thu Aug 13, 2020 13:28
Dynamic structural transitions within the seven‐transmembrane bundle represent the mechanism by which G protein‐coupled receptors convert an extracellular chemical signal into an intracellular biological function. Here, the conformational dynamics of the neuropeptide Y receptor type 2 (Y2R) during activation was investigated. The apo, full agonist‐ and arrestin‐bound states of Y2R were prepared by cell‐free expression, functional refolding, and reconstitution into lipid membranes. To study the...
Thu Aug 13, 2020 13:28
While many key photophysical features are understood for electronic communication between chromophores in neutral compounds, there is limited information on the effect of charges in practically relevant ionic chromo/fluorophores. Here we have chosen positively charged rhodamines and prepared a selection of homo‐ and heterodimers with alkyl or π‐conjugated, acetylenic bridges. Protonated molecules were transferred as isolated ions to gas phase where there is no solvent screening of charges, and fluorescence...
Thu Aug 13, 2020 11:49
Dual emission materials have found much interest in the past years for materials and life science applications; however, a systematic overview on the underlying processes is missing by now. This is done herein, classifying dual emission (DE) phenomena, relying either on one emitter with two emitting states (DE1), two independent emitters (DE2), or two correlated emitters (DE3). Relevant DE mechanisms for materials science are then briefly described, giving the electronic and/or geometrical conditions...
Wed Aug 12, 2020 22:53
Temperature sensor plays a significantly important role in the areas of biology, chemistry and engineering, especially the one can work accurately in a noninvasive manner are extremely attractive. We adopt photoinduced postsynthetic copolymerization strategy and realize membranous ratiometric luminescent thermometer based on emissions of two lanthanide ions. This novel mixed lanthanide polyMOF membrane exhibits not only the integrity and temperature sensing nature of Ln‐MOF powder, but also excellent...
Wed Aug 12, 2020 22:52
The dynamic covalent self‐assembly of 14 units of bis(perfluorocatecholato)silane leads to [Si(O 2 C 6 F 4 )2] 14 – the first giant perfluorinated macrocycle. The oligomerization process is monitored spectroscopically, and the consummate macrocycle analyzed by single‐crystal x‐ray diffraction. The molecule spans a rigid cavity that can host two o ‐closo‐dodecacarboranes. Computations rationalize the consistent and reproducible formation of the 14mer and disclose a non‐catalyzed Si‐O/Si‐O...
Wed Aug 12, 2020 22:00
Herein, we demonstrated a bifunctional catalyst design concept of CuCl 2 /Al 2 O 3 and N‐doped carbon for an efficient one‐pot ethylene oxychlorination process to produce VCM up to 76% yield at 250 ˚C and ambient pressure, higher than the conventional industrial two‐step process (~50%). In addition to the CuCl 2 ‐based ethylene oxychlorination catalyst in the first bed, we demonstrated the active sites containing N‐functional groups on the metal‐free N‐doped carbon in the second bed catalyzed...
Wed Aug 12, 2020 20:43
Molecularly imprinted polymers (MIPs) are artificially synthesized affinity materials with tailor‐made binding cavities complementary to the template molecules in shape, size and functionality. Recently, engineering MIP‐based nanomedicines to improve cancer therapy has become a rapidly growing field and future research direction. Because of the unique properties and functions of MIPs, MIP‐based nanoparticles (nanoMIPs) are not only alternative to current nanomaterials for cancer therapy, but also...
Wed Aug 12, 2020 19:56
Single‐atom catalysts (SACs) have shown superior activity and/or selectivity for many energy‐ and environment‐related reactions, but their stability at high site density and under reducing atmosphere remains unresolved. Herein, we elucidate the intrinsic driving force of palladium single atom with high site density (up to 5 wt%) under reducing atmosphere, and its unique catalytic performance for hydrogenation reactions. In‐situ experiments (including scanning transmission electron microscopy, near‐ambient...
Wed Aug 12, 2020 19:56
Large, macrocyclic peptides can achieve surprisingly high membrane permeability, although the properties that govern permeability in this chemical space are only beginning to come into focus. We generated two libraries of cyclic decapeptides with stable, cross‐ b conformations, and found that peptoid substitutions within the b ‐turns of the macrocycle preserved the rigidity of the parent scaffold, whereas peptoid substitutions in the opposing b ‐strands led to “chameleonic” species that were rigid...
Wed Aug 12, 2020 19:25
Rapid and selective removal of micropollutants from water is the global issue for reuse of water resources. Despite hollow frameworks with specific functionalized porous walls have been used for the selective adsorption based on a series of interactions, tailoring a stable shape of nano‐ and micrometer‐sized architectures for the removal of specific pollutants remains a challenge. Here, exactly controlled sheets, tubes, and spherical frameworks were presented from the crosslinking of supramolecular...
Wed Aug 12, 2020 19:24
Topology influences properties and applications of polymers. Consequently, considerable efforts have been made to control topological structures. In this work, we developed a photoorganocatalyzed divergent synthetic approach based on reversible deactivation radical polymerization (RDRP) that enables the preparation of both linear and branched fluoropolymers of low Ð , tunable degree of branching and high chain‐end fidelity by exposing to LED light irradiation under metal‐free conditions. This method...
Wed Aug 12, 2020 18:45
All‐inorganic zero‐dimensional (0D) metal halides have recently received increasing attention due to their excellent photoluminescence (PL) performance and high stability. Herein, we present the successful doping of copper(I) into 0D Cs 2 ZnBr 4 . The incorporating of Cu + cations enables the originally weakly luminescent Cs 2 ZnBr 4 to exhibit an efficient blue emission centered at around 465 nm, with a high photoluminescence quantum yield (PLQY) of 65.3%. Detailed spectral characterizations...
Wed Aug 12, 2020 18:34
Herein, a new bipolar membrane, with different functional groups in the poly(ether sulfone) chain, is fabricated through by a nonsolvent‐induced phase separation (NIPS) and spin‐coating (SC) method. The asymmetric structure helps to form distinct ion rectification and results in good power generation performance. Abstract Osmotic energy, obtained through different concentrations of salt solutions, is recognized as a form of a sustainable energy source. In the past years, membranes derived...
Wed Aug 12, 2020 18:29
A novel near‐infrared (NIR‐II) chemiluminescence sensor was prepared by cascade chemiluminescence resonance energy transfer (CRET) and one‐step Förster resonance energy transfer (FRET). The sensor is capable of in vivo high‐contrast inflammation imaging. Key: chemiluminescence (CL), 1,2‐dioxetanedione intermediate (DOD), fluorescence (FL), region of interest (ROI). Abstract Chemiluminescence (CL) sensing without external excitation by light and autofluorescence interference has been applied...
Wed Aug 12, 2020 18:29
By introducing a compatible reducing agent into a mono‐micelle assembly process, ordered mesoporous TiO2 microspheres that combine radially aligned mesostructure with Ti3+ defects in mesoporous frameworks is formed. The reductant acts as a building block of mesostructured frameworks and reduces Ti4+ in situ to generate defects during calcination, giving rise to the coexistence of bulk Ti3+ defects and an ordered mesostructure. Abstract By introducing a compatible reducing agent (2‐ethylimidazole)...
Wed Aug 12, 2020 18:28
A PROTAC composed of a selective stapled peptide for transcription coactivator SRC‐1 linked to a specific ligand for UBR E3 ligase induces the selective degradation of SRC‐1. This first‐in‐class SRC‐1 degrader efficiently impairs SRC‐1‐mediated transcription and suppresses cancer cell invasion and migration in vitro and in vivo and holds promise as an invaluable tool to probe SRC‐1 functions. Abstract Aberrantly elevated steroid receptor coactivator‐1 (SRC‐1) expression and activity are...
Wed Aug 12, 2020 18:28
The metal‐catalyzed chain‐walking reaction has recently emerged as a powerful strategy to functionalize remote positions in organic molecules. However, a chain‐walking protocol for nonconjugated dienes remains scarcely reported and his development is currently ongoing. In this context, a nickel‐catalyzed asymmetric hydrocyanation of nonconjugated dienes involving the chain‐walking process is demonstrated. The reaction exhibits excellent regio‐ and chemoselectivity, and a wide range of substrates...
Wed Aug 12, 2020 17:44
The defect in perovskite film is one of the most non‐negligible factors that can attenuate the performances of perovskite solar cell. This work fabricates defects‐reduced perovskite film by using the lead indicator (dithizone) as an additive of perovskite functional layer. The dithizone can retard the crystallization rate of perovskite films, passivate the defects, and enhance the structure stability of perovskite by coordinating with lead atoms. As a result, the device doped with dithizone yields...
Wed Aug 12, 2020 16:56
Microbial genomes harbor an abundance of biosynthetic gene clusters, but most are expressed at low levels and need to be activated for characterization of their cognate natural products. In this work, we report the combination of high‐throughput elicitor screening (HiTES) with Matrix‐Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI‐MS) for the rapid identification of cryptic peptide natural products. Application to Streptomyces ghanaensis identified amygdalin as an elicitor of a novel...
Wed Aug 12, 2020 16:55
While Type I and Type II photosensitizers are often carefully tailored to achieve their respective advantages in treating different cancers, the identifications of the Type I and II mechanisms per se , the key reaction intermediates, and the consequent oxidation products of the substrates have never been easy. Using our unique home‐built field‐induced droplet ionization mass spectrometry (FIDI‐MS) methodology that selectively samples molecules at the air‐water interface,here we show the facile...
Wed Aug 12, 2020 16:54
We describe the development of a repository for chemistry research data (called Chemotion) that provides solutions for current challenges to store research data in a feasible manner, allowing the conservation of domain specific information in a machine readable format. A main advantage of the repository Chemotion is the comprehensive functionality, offering options to collect, prepare and reuse data with discipline specific methods and data processing tools. For selected analytical data, automated...
Wed Aug 12, 2020 15:19
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