Electrosynthesis of Atomically Precise Au Nanoclusters.

Innovation in synthesis methodologies is crucial for advancing the discovery of new materials. This work reports the electrosynthesis of a [Au(4-BuPhC≡C)(Dppe)]Cl nanocluster (Au NC) protected by alkynyl and phosphine ligands. From simple precursor, HAuCl and ligands, the whole synthesis is driven by a constant potential in single electrolytic cell.

Substituent effect in determining the total structure of an all-alkynyl-protected Ag nanocluster for methanol tolerant oxygen reduction reaction.

Metal nanoclusters (NCs) with atomically precise structures are desirable models for truly understanding their structure-property relationship. This study reports the synthesis and structural anatomy of a Ag NC protected solely by an alkynyl ligand, 2-(trifluoromethyl)phenylacetylene (2-CFPhC[triple bond, length as m-dash]CH), which features a -CF substituent at the position (-CF). 2-CFPhC[triple bond, length as m-dash]CH ligands are so exquisitely arranged on the surface of Ag that the steric hindrance caused by -CF is minimized but its function as a hydrogen-bond (H-bond) acceptor (H⋯F) is maximized.

Photochemical Synthesis of Atomically Precise Ag Nanoclusters.

Photochemical methods are effective for controllable synthesis of silver nanoparticles with specific sizes and shapes. Whether they are capable of fabricating Ag nanoclusters (NCs) with atomic precision is yet to be proved. In this work, we synthesize an atomically precise Ag NC, [Ag(4-MePhC≡C)(Dpppe)](SbF) (), a process mediated by visible light.

Thirst in heart failure: A scoping review.

Aim: The aim of this study was to summarise the overall picture of thirst-related research in patients with heart failure.

Design: We conducted a scoping review following the Arskey and O'Malley methodological framework along with the PAGER framework.

Methods: PubMed, CINAHL, Web of Science, Embase, The Cochrane Library, Jonna Briggs Institute, ProQuest Database, Google Scholar, PsycINFO, PQDT, CNKI, Wan Fang, VIP and CBM.

Polyoxotitanate Molecular Cage Featuring Four Types of Ethylenediamines: Formation Mechanism Insight from Host-Guest Interaction and Crystallographic Study.

Titanium-oxide or polyoxotitanate clusters are a new type of inorganic host materials that can encapsulate inorganic molecules or ions. We report herein a (NH)(enH)[TiO(PhCOO)(en)] molecular cage (Ti) that encapsulates an entire organic ethylenediamine (en) ion. A thorough investigation has revealed the extraordinary versatility of en.

A triflate and alkynyl protected Ag nanocluster with a passivated surface.

A trifluoromethanesulfonate (OTf) and -butylacetylene ( BuC[triple bond, length as m-dash]C) co-protected silver nanocluster (NC), Ag( BuC[triple bond, length as m-dash]C)(CFSO) (Ag), was synthesized and characterized. Single crystal X-ray diffraction analysis revealed its total structure. 43 Ag atoms are arranged into a three-concentric-shell Ag@Ag@Ag structure.

Understanding the Capability of an Ecosystem Nature-Restoration in Coal Mined Area.

Ecosystem issues have been severely concerned and studied when the coal resource is one of major energy generators, and green mining innovation techniques involving artificial-restorations have addressed and significantly lessened negative impacts on the ecological environment. The ecosystem of a coal-mined area, however, is able to naturally restore with the processes of natural succession, similar to the human body system that has the immune ability to self-heal a wound over time if the wound does not deeply hurt the health. Here we analyze multiple discipline real data from two mining sites, and evidently show an ability of nature that the coal mining related problems such as geological cracks, damaged aquifers and destroyed soils in Quaternary period can naturally recover around a half-year after the end of mining.

Coexistence of Cu(ii) and Cu(i) in Cu ion-doped zeolitic imidazolate frameworks (ZIF-8) for the dehydrogenative coupling of silanes with alcohols.

Recently, metal-ion-doped zeolitic imidazolate frameworks have gained considerable attention for their structure tailorability and potential catalytic applications. Herein, Cu ion-doped ZIF-8 nanocrystals were successfully prepared by the mechanical grinding of Cu(NO), ZnO and 2-methylimidazole (HMeIM) using ethanol as an additive. In contrast to the general view that only Cu(ii) is present in Cu-doped ZIF-8, we found the coexistence of Cu(ii) and Cu(i) in this material, which was supported by XPS and X-ray induced Auger electron spectroscopy (XAES) characterizations.

Recent advances in the preparation and application of mussel-inspired polydopamine-coated capillary tubes in microextraction and miniaturized chromatography systems.

Capillary tubes are widely used in micro-devices because of their tubular structure, high efficiency, small dead volume and good flexibility. In micro-devices, such as miniaturized chromatography and solid phase microextraction, capillary tubes play a crucial role as stationary phases, carriers or adsorbents for complex sample analysis. Many strategies have been proposed to improve their performance and extend their application by surface engineering.

Mesoporous silica nanoparticles incorporated hybrid monolithic stationary phase immobilized with pepsin for enantioseparation by capillary electrochromatography.

In this study, a novel mesoporous silica nanoparticles incorporated chiral hybrid monolithic stationary phase was developed. The stationary phase was firstly prepared by an in situ copolymerization of amino-modified mesoporous silica nanoparticles (NH-MSN), glycidyl methacrylate (GMA), and ethylene dimethacrylate (EDMA) and then functionalized with pepsin as chiral selector. The incorporated mesoporous silica nanoparticles provided additional interactions sites, and in turn yielded different enantioselectivity thus enhancing the overall separation.

Preparation of graphene oxide-modified affinity capillary monoliths based on three types of amino donor for chiral separation and proteolysis.

Novel graphene oxide (GO)-modified affinity capillary monoliths were developed employing human serum albumin (HSA) or pepsin as chiral selector. Three types of amino donors for GO immobilization, including ammonium hydroxide (NH4OH), ethanediamine (EDA) and polyethyleneimine (PEI), were applied to explore the effect of spacer arm on enantioseparation. It was observed that HSA-GO-EDA-based affinity capillary monoliths exhibited better chiral recognition ability in comparison with the other two spacer-based monoliths.