hyongl

A photochromic metal-organic gel with thermo-, photo-, and anion-responsive behavior is obtained. Unusually, heating of the Al–ligand solution leads to gel formation and cooling to room temperature reverses the process to reform the solution. The gel is sensitive to weakly coordinating anions. Additionally, reversible photochromic transformations take place both in the solution and gel states, accompanied by reversibly switched luminescence.

Three-dimensional electrodes offer great advantages, such as enhanced ion and electron transport, increased material loading per unit substrate area, and improved mechanical stability upon repeated charge–discharge. The origin of these advantages is discussed and the criteria for ideal 3D electrode structure are outlined. One of the common features of ideal 3D electrodes is the use of a 3D carbon- or metal-based porous framework as the structural backbone and current collector. The synthesis methods of these 3D frameworks and their composites with redox-active materials are summarized, including transition metal oxides and conducting polymers. The structural characteristics and electrochemical performances are also reviewed. Synthesis of composite 3D electrodes is divided into two types — template-assisted and template-free methods — depending on whether a pre-made template is required. The advantages and drawbacks of both strategies are discussed.

Ideal 3D electrodes offer kinetics and mass transport advantages in electrochemical energy storage. The common features of ideal 3D electrodes are summarized and recent advances in both template-assisted and template-free synthesis, as well as the electrode performance, are reviewed.

Although the corrin ring of vitamin B₁₂ is unable to efficiently absorb light beyond 550 nm, it is shown that commercially available fluorophores can be used as antennas to capture long-wavelength light to promote scission of the CoC bond at wavelengths up to 800 nm. The ability to control the molecular properties of bioactive species with long visible and near-IR light has implications for drug delivery, nanotechnology, and the spatiotemporal control of cellular behavior.

Nicht auf der gleichen Wellenlänge: Eine Serie von lichtresponsiven Agentien wird beschrieben, deren Aktivierungswellenlänge mithilfe leicht zugänglicher Fluorophore über den sichtbaren Bereich und in den Nah-IR-Bereich hinein eingestellt werden kann, sodass mehrere Spezies orthogonal kontrolliert werden können. Mithilfe dieser Agentien wurden der Austausch zwischen Organellen, die Zerlegung von Stressfasern und der Lichtdosis-abhängige Zelltod ausgelöst.

A new approach for the fabrication of homogeneous HKUST-1 [Cu₃(BTC)₂] coatings on copper metal plates, 3D objects, and as patterns, is here proposed. The conversion can be performed at room temperature in approximately 30 minutes using an aqueous ethanolic mixture. The two step conversion mechanism occurs via the formation of Cu(OH)₂ nanotubes. Microscopic time-course monitoring reveals the conversion steps. The adhesion of the metal organic-framework (MOF) crystals, as well as the functional properties of the resulting supported catalyst, are successfully tested. The versatility of the conversion mechanism on different metal copper substrates is investigated as well; in particular, a photolithography protocol is proposed for the preparation of MOF patterns. This protocol offers several features (short processing time, applicability to any copper metal object, low cost of the equipment, room temperature conditions) that would make it favorable for basic research and industrial exploitation of MOF capabilities.

HKUST-1 [Cu₃(BTC)₂] coatings with a good adhesion are homogeneously fabricated on copper metal plates, 3D objects, and patterns. The MOFs are converted from any metallic Cu object via Cu(OH)₂ nanotubes at room temperature in approximately 30 min using an aqueous ethanolic mixture. The conversion mechanism from copper hydroxide nanotubes into Cu₃(BTC)₂ is revealed by electron microscopy time-course monitoring.

或许运气也是由自己决定的？

隐藏在时间中的运气

图片来自：《怪咖心理学》一书。

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Inspired by biology, in which a bimetallic hydroxide-bridged zinc(II)-containing enzyme is utilized to catalytically hydrolyze phosphate ester bonds, the utility of a zirconium(IV)-cluster-containing metal–organic framework as a catalyst for the methanolysis and hydrolysis of phosphate-based nerve agent simulants was examined. The combination of the strong Lewis-acidic Zr^IV and bridging hydroxide anions led to ultrafast half-lives for these solvolysis reactions. This is especially remarkable considering that the actual catalyst loading was a mere 0.045 % as a result of the surface-only catalysis observed.

Nervengas-Zusammenbruch: UiO-66, ein biomimetisches Metall-organisches Gerüst auf der Basis eines Zirconium-Oxoclusters, katalysiert den schnellen Abbau von Modellverbindungen für Phosphat-Nervengase, z. B. in der hoch effizienten Methanolyse und Hydrolyse von Methylparaoxon (siehe Bild, R=CH₃).