Angewandte Chemie

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Magnetic‐Field‐Stimulated Efficient Photocatalytic N2 Fixation over Defective BaTiO3 Perovskites

A model ferroelectric photocatalyst, BaTiO3, was treated with NaBH4 to introduce surface oxygen vacancies (Ov‐BTO). The resultant material offers spin‐polarized regulation and an increased internal electric field (IEF). The function of Ov‐induced photocatalytic activity under an external magnetic field is explored and the positive effect of the external...

Understanding the Reduction of Transition‐Metal Phosphates to Transition‐Metal Phosphides by Combining Temperature‐Programmed Reduction and Infrared Spectroscopy

TPR‐IR technique is an efficient method to understand the complex processes of catalyst preparation. Ni2P drastically accelerated the formation of PH3 and the reaction of PH3 with H2O, which can be important reasons that excess phosphorus is needed for the reduction of nickel phosphate to Ni2P. Abstract Temperature‐programmed reduction of transition‐metal...

Covalent Probes for Aggregated Protein Imaging via Michael Addition

Squeeze and react: a bio‐inspired fluorescence color‐switch probe uncovers that covalent Michael addition can generally occur inside aggregated proteins. Abstract Covalent chemical reactions to modify aggregated proteins are rare. Here, we reported covalent Michael addition can generally occur upon protein aggregation. Such reactivity was initially...

Complexation of an Antimicrobial Peptide by Large‐Sized Macrocycles for Decreasing Hemolysis and Improving Stability

Two water‐soluble large‐sized quaterphen[n]arenes (WQPns, n=3, 4) were designed and synthesized. Macrocycles WQP3 and WQP4 could strongly complex with an antimicrobial peptide, pexiganan (PXG). Host–guest complexation served to not only efficiently decrease the PXG's hemolysis in rabbit red blood cells, but also substantially enhance its metabolic stability...

Polarity‐Sensitive Ratiometric Fluorescence Probe for Monitoring Lipid Droplets/Nucleus Change During Ferroptosis

Ferroptosis regulates cell death through reactive oxygen species associated lipid peroxide accumulation, which is expected to affect the structure and polarity of lipid droplets (LDs), but with no clear evidence. Herein, we report the first example of LD and nucleus dual‐targeted ratiometric fluorescent probe of CQPP for monitoring polarity change in...

A Two‐Dimensional Polyimide‐Graphene Heterostructure with Ultra‐fast Interlayer Charge Transfer

Two‐dimensional polymers (2DPs) are a class of atomically/molecularly thin crystalline organic 2D materials. They are intriguing candidates for the development of unprecedented organic‐inorganic 2D van der Waals heterostructures (vdWHs) with exotic physicochemical properties. In this work, we demonstrate the on‐water surface synthesis of large‐area...

Cycloparaphenylene–Phenalenyl Radical and Its Dimeric Double Nanohoop**

A neutral open‐shell carbon nanoring was achieved by integration of the phenalenyl unit into the cycloparaphenylene framework. It is shown that the spin distribution and reactivity of this hydrocarbon in the shape of a diamond ring are a result of steric and electronic effects and that selective dimerization yields a double nanohoop with a radial‐planar‐radial...

Fluorine‐Induced Surface Metallization for Ammonia Synthesis under Photoexcitation up to 1550 nm

The surface metallization of TiO2−x was achieved through the bonding between surface terminal Ti‐F groups and adjacent Ti3+. The metalized TiO2 with reduced work function and downward band bending possesses high electron‐donating power to supported Ru species via atomic‐scale ohmic contacts, exhibiting superior photocatalytic performances for ammonia...

Multicomponent Self‐Assembly of a Giant Heterometallic Polyoxotungstate Supercluster with Antitumor Activity

Hierarchical assembly of a giant heterometallic polyoxotungstate supercluster with a molecular weight of ca. 25 kDa is reported. Geometrically unrestricted cerium(III) and geometrically restricted dimethyl tin cations linkers are used to gain access to a giant molecular species featuring three different polyoxometalate building units. The compound demonstrates...

Engineering High‐Spin State Cobalt Cations in Spinel Zinc Cobalt Oxide for Spin Channel Propagation and Active Site Enhancement in Water Oxidation

Promoting the initially deficient but cost‐effective catalysts to high‐performing competitors is of significance in developing better catalysts. Spinel zinc cobalt oxide (ZnCo 2 O 4 ) is not considered as a superior catalyst for the electrochemical oxygen evolution reaction (OER), which is the bottleneck reaction in water‐electrolysis. Herein, taking...

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