【最新中稿作品】{ScnGdn} 异金属环、时空线型剪裁、电化学等|electrode|gd|mofs|olefin|金属环

中稿作品解读

标题

{ScnGdn} Heterometallic Rings: Tunable Ring Topology for Spin-Wave Excitations

作者

Hao-Lan Zhang, Yuan-Qi Zhai, Hiroyuki Nojiri, Christian Schröder, Hung-Kai Hsu, Yi-Tsu Chan, Zhendong Fu, Yan-Zhen Zheng

引用

J. Am. Chem. Soc. 2022, 144, 33, 15193–15202

DOI

https://doi.org/10.1021/jacs.2c05421

研究介绍

在自旋电子和磁力逻辑器件中使用自旋波的数据载体可在低功耗和无焦耳热的情况下运行，但需要小尺寸的非共线自旋结构。由于在这种有限空间内的受控自旋波传输，异质金属环可以提供这种机会。

在这里，研究人员提出了一系列 {Sc n Gd n } ( n = 4, 6, 8) 异金属环，它们是迄今为止第一个 Sc-Ln 簇，具有可调谐的自旋波激发磁相互作用。通过时间和温度相关的自旋动力学模拟，我们能够预测Sc 4 Gd 4、Sc 6在有限温度下的不同自旋波激发Gd 6和Sc 8 Gd 8。

这种新模型以前未被开发，特别是由于反铁磁交换、偶极-偶极相互作用和低温下的环形拓扑的相互作用，使得后者对自旋波激发的重要性。

中稿封面·一周精选

Volume32, Issue34 August 19, 2022

Titel

Spatiotemporal Lineshape Tailoring in BIC-Mediated Reconfigurable Metamaterials

DOI

https://doi.org/10.1002/adfm.202270194

Abstract（上下滑动查看）

In article number 2203680, Tian Jiang and co-workers demonstrate a novel reconfigurable metasurface supporting a symmetry-protected bound state in the continuum in the electromagnetic induced transparency window. With active media embedded in the proposed metasurface, spatiotemporal lineshape tailoring with resonance mode conversion and ultrafast amplitude switching is successfully achieved, which is appealing for next-generation flat photonic devices with high-compact, functionality-integrated, and fast-speed properties.

Volume61, Issue36 September 5, 2022

Titel

In Operando Visualization and Dynamic Manipulation of Electrochemical Processes at the Electrode–Solution Interface

DOI

https://doi.org/10.1002/anie.202206236

Abstract（上下滑动查看）

Revealing the dynamic processes at the electrode–solution interface is imperative for understanding electrochemical phenomena. Most techniques have been developed to sense the electrode surface changes at the nanoscale, but provide limited information on potential-induced interfacial ion redistribution at the mesoscale. Herein, we present an in operando visualization method utilizing a microfabricated electrochemical cell combined with a laser scanning confocal microscope to observe high-resolution and fast-response interfacial processes. We report potential-induced formation and transformation of the Nernst diffusion layer, demonstrating that pulsed voltage dynamically perturbs the interface and promotes ion diffusion. This provides an additional insight into developing a dynamic manipulation method to control the electrochemical process. Our novel visualization method can easily be applied to monitor different ionic behaviors in electrochemical reactions at the mesoscale.

Volume3, Issue3 September 2022

Titel

Vanadium-based metal-organic frameworks and their derivatives for electrochemical energy conversion and storage

DOI

https://doi.org/10.1002/smm2.1091

Abstract（上下滑动查看）

With the excessive consumption of nonrenewable resources, the exploration of effective and durable materials is highly sought after in the field of sustainable energy conversion and storage system. In this aspect, metal-organic frameworks (MOFs) are a new class of crystalline porous organic-inorganic hybrid materials. MOFs have recently been gaining traction in energy-related fields. Owing to the coordination flexibility and multiple accessible oxidation states of vanadium ions or clusters, vanadium-MOFs (V-MOFs) possess unique structural characteristics and satisfactory electrochemical properties. Furthermore, V-MOFs-derived materials also exhibit superior electrical conductivity and stability when used as electrocatalysts and electrode materials. This review summarizes the research progress of V-MOFs (inclusive of pristine V-MOFs, V/M-MOFs, and POV-based MOFs) and their derivatives (vanadium oxides, carbon-coated vanadium oxide, vanadium phosphate, vanadate, and other vanadium doped nanomaterials) in electrochemical energy conversion (water splitting, oxygen reduction reaction) and energy storage (supercapacitor, rechargeable battery). Future possibilities and challenges for V-MOFs and their derivatives in terms of design and synthesis are discussed. Lastly, their applications in energy-related fields are also highlighted.

Volume 70, Issue 32 August 17, 2022

Titel

Krill Oil Turns Off TGF-β1 Profibrotic Signaling in the Prevention of Diabetic Nephropathy

DOI

https://doi.org/10.1021/acs.jafc.2c02850

Abstract（上下滑动查看）

Diabetic nephropathy (DN), a severe microvascular complication of diabetes mellitus (DM), results in high mortality due to the lack of effective interventions. The current study investigated the preventive effect of krill oil (KO) on DN using a type 2 DM mouse model induced by streptozotocin and high-fat diet for 24 weeks. The diabetic mice developed albuminuria, mesangial matrix accumulation, glomerular hypertrophy, and fibrosis formation, with an increase in renal proinflammatory, oxidative and profibrotic gene expression. KO significantly prevented these effects but did not improve hyperglycemia and glucose intolerance. In high-glucose-treated mesangial cells (MCs), KO preferably modulated TGF-β1 signaling as revealed by RNA-sequencing. In TGF-β1-treated MCs, KO abolished SMAD2/3 phosphorylation and nuclear translocation and activated Smad7 gene expression. The action of KO on the SMADs was confirmed in the diabetic kidneys. Therefore, KO may prevent DN predominantly by suppressing the TGF-β1 signaling pathway.

Volume40, Issue19October1, 2022

Titel

Palladium-Catalyzed Long-Range Isomerization of Aryl Olefins

DOI

https://doi.org/10.1002/cjoc.202200254

Abstract（上下滑动查看）

Long-range olefin isomerization could lead to the remote functionalization of hydrocarbon chains, which is advantageous with regards to atom-, step-, and redox economy. However, present methodologies for long-range olefin isomerization are mainly focused on heteroatom directed remote olefin migration; studies using aryl groups as the directing group are limited. The limited examples either utilize aryl olefins with special substituted groups on a benzene ring, or use elaborately optimized ligands or co-catalysts to accelerate the isomerization. A more simple catalytic system for general aryl olefins, without the need for special ligands or co-catalysts, was to be developed. Herein, we report a Pd-catalyzed long-range olefin isomerization (up to 15 units) for general aryl olefins via a 1,2-hydrogen shift mechanism. This methodology provides a simple pathway to long-range olefin isomerization without the participation of special ligands or co-catalysts.

Vol. 38 ,Issue 4 2022

Titel

Special Column on Biomolecular Recognition and Functional Regulation

DOI

https://doi.org/10.1039/D2GC01256A

Abstract

The regulation of biological functions plays an important role in life processes. Molecular recognition usually manifests as the selectively combining process of two molecules, such as ligand and receptor, and subsequently performs a certain function. When the receptor binds to its ligand, a series of biochemical reactions will be initiated to activate or inhibit the downstream biological functions. The selective binding between ligand and receptor is based on non-covalent interactions, such as hydrogen-bond interactions and van der Waals forces. The interaction between ligand and receptor can be changed by molecular modification, and the downstream biochemical reaction, such as phosphorylation can thus be affected, thereby realizing the regulation of biological functions. The specific recognition of biomolecules in organisms is closely related to the occurrence and development of diseases. Precise molecular recognition has made outstanding achievements in biomolecular detection, drug therapy target discovery, and gene therapy. The regulation of biological functions through molecular recognition provides a theoretical basis for understanding the relationship between molecular structure and function at the molecular level, and will greatly promote the development and integration of chemical biology and life sciences. Herein, this themed column focuses on the burgeoning research in the regulation of biological functions through molecular recognition. The content includes the design and sensing strategies of molecular recognition, as well as the application of molecular recognition in the functional regulation of different life processes in organisms.

Volume 65, Issue 15 August 1, 2022

Titel

Tumor microenvironment-activated single-atom platinum nanozyme with H2O2 self-supplement and O2-evolving for tumor-specific cascade catalysis chemodynamic and chemoradiotherapy

DOI

https://doi.org/10.7150/thno.73039

Abstract（上下滑动查看）

Nanozyme-based tumor collaborative catalytic therapy has attracted a great deal of attention in recent years. However, their cooperative outcome remains a great challenge due to the unique characteristics of tumor microenvironment (TME), such as insufficient endogenous hydrogen peroxide (H2O2) level, hypoxia, and overexpressed intracellular glutathione (GSH).

Methods:Herein, a TME-activated atomic-level engineered PtN4C single-atom nanozyme (PtN4C-SAzyme) is fabricated to induce the “butterfly effect” of reactive oxygen species (ROS) through facilitating intracellular H2O2 cycle accumulation and GSH deprivation as well as X-ray deposition for ROS-involving CDT and O2-dependent chemoradiotherapy.

Results:In the paradigm, the SAzyme could boost substantial ∙OH generation by their admirable peroxidase-like activity as well as X-ray deposition capacity. Simultaneously, O2 self-sufficiency, GSH elimination and elevated Pt2+ release can be achieved through the self-cyclic valence alteration of Pt (IV) and Pt (II) for alleviating tumor hypoxia, overwhelming the anti-oxidation defense effect and overcoming drug-resistance. More importantly, the PtN4C-SAzyme could also convert O2·- into H2O2 by their superior superoxide dismutase-like activity and achieve the sustainable replenishment of endogenous H2O2, and H2O2 can further react with the PtN4C-SAzyme for realizing the cyclic accumulation of ∙OH and O2 at tumor site, thereby generating a “key” to unlock the multi enzymes-like properties of SAzymes for tumor-specific self-reinforcing CDT and chemoradiotherapy.

Conclusions:This work not only provides a promising TME-activated SAzyme-based paradigm with H2O2 self-supplement and O2-evolving capacity for intensive CDT and chemoradiotherapy but also opens new horizons for the construction and tumor catalytic therapy of other SAzymes.

Keywords:Single-atom nanozyme, tumor microenvironment-activated, enzyme-like activity, tumor catalytic therapy, chemodynamic and chemoradiotherapy

Volume 13, No2 2022

ISSN 2095-0357 CN51-1735/Q

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