Interfacial engineering of heterostructured Fe-NiS/Ni(OH) nanosheets with tailored d-band center for enhanced oxygen evolution catalysis.

Hydrogen production by electrochemical water splitting suffers from high kinetic barriers in the anodic oxygen evolution reaction (OER), which limits the overall efficiency. Herein, we report a structural and electronic engineering strategy by integrating self-standing Fe-doped NiS (denoted by Fe-NiS) nanosheet arrays with Ni(OH) subunits to form heterostructured Fe-NiS/Ni(OH) on a Ni Foam substrate. The strong electronic interaction between the Fe-NiS and Ni(OH) constituents contributes abundant catalytic sites and ensures high electron transfer.

Converting a Non-Porous Rare-Earth Metal-Organic Framework into a Porous Yttrium-Based NHUiO-66 Network via a Linker Exchange Approach.

The solvent-assisted linker exchange (SALE) method was used to produce amino-functionalized yttrium-based UiO-66 [NHUiO-66(Y)], which is not obtainable via a direct synthetic method. Remarkably, SALE not only produced relatively highly porous NHUiO-66(Y) from completely non-porous 3,3-bpdc-Y but also changed the network topology from 8-connected in 3,3-bpdc-Y to 12-connected in NHUiO-66(Y). Based on our knowledge, this is one of the rare cases where SALE changes the whole network topology of the resulting metal-organic framework.

Drug Delivery Using Hydrophilic Metal-Organic Frameworks (MOFs): Effect of Structure Properties of MOFs on Biological Behavior of Carriers.

To study the influence of pore structural properties of metal-organic frameworks (MOFs) on drug adsorption and delivery, we synthesized two MOF termed TMU-6(RL1) {[Zn(oba)(RL1)]·(DMF)} and TMU-21(RL2) {[Zn(oba)(RL2)]·(DMF)} with amine basic N-donor pillars containing phenyl or naphthyl cores with various hydrophilic properties around the main center of the reaction. TG, IR, XPS, and PXRD analyses were used to extensively characterize the MOFs. The synthesized carriers showed high adsorption efficiency, stability, and controlled release.

In Situ Transformation of Metal-Organic Frameworks into Hollow Nickel-Cobalt Double Hydroxide Arrays for Efficient Water Oxidation.

Developing earth-abundant electrocatalysts for efficient oxygen evolution reaction (OER) is of paramount significance for electrochemical water splitting. Herein, an efficient in situ etching-deposition growth strategy is employed to transform pristine two-dimensional (2D) Co-metal-organic frameworks into hollow Ni/Co double hydroxide arrays (denoted as Ni/Co-DH), which not only yields a larger surface area and exposes more active sites but also decreases the activation energy to the OER. With structural and compositional benefits, the Ni/Co-DH exhibits high performance with an overpotential of 229 mV at 10 mA cm and exceptional long-term stability of over 90 h in 1 M KOH medium for OER, comparable to most non-noble oxygen evolution catalysts reported so far.

Highly Sensitive Colorimetric Naked-Eye Detection of Hg Using a Sacrificial Metal-Organic Framework.

This study has developed a specific, easy, and novel approach to designing a sacrificial metal-organic framework (MOF) that can detect and measure the amount of Hg in aqueous and nonaqueous solutions using the naked eye. The functionalized [Zn(oba)(RL3)]·1.5DMF (TMU-59) provides the ability of simple visual assessment or colorimetric readout without sophisticated analytical equipment.

Stable supercapacitor electrode based on two-dimensional high nucleus silver nano-clusters as a green energy source.

Atomically precise silver nanoclusters (Ag-NCs) are known as a hot research area owing to their brilliant features and they have attracted an immense amount of research attention over the last year. There is a lack of sufficient understanding about the Ag-NC synthesis mechanisms that result in optimal silver nanoclusters with an appropriate size, shape, and morphology. In addition, the coexisting flexible coordination of silver ions, the argentophilic interactions, and coordination bonds result in a high level of sophistication in the self-assembly process.

Phenolic nitroaromatics detection by fluorinated metal-organic frameworks: Barrier elimination for selective sensing of specific group of nitroaromatics.

Many piesce of research have been performed to detect nitroaromatic-compounds (NACs) by metal-organic frameworks (MOFs). Despite extensive studies, there are still significant challenges like selective detection of specific NAC group in presence of other NACs. Here, we have integrated two functionalization strategies through decoration of pore-walls of the MOFs with trifluoromethyl groups and extension in π-conjugated system.

Reuse of Predesigned Dual-Functional Metal Organic Frameworks (DF-MOFs) after Heavy Metal Removal.

Designing porous and functionalized adsorbents and achieving high efficiency in heavy metals removal from wastewater is in the spotlight of environmental science. On the other hand, upon removal, adsorbents are still highly hazardous requiring that great care be taken in its packaging, transporting and storing. A fundamental route in the synthesis of functional extended structures is the ability to combine different chemical entities in a controlled way in order to achieve high performance.

Size-Selective Urea-Containing Metal-Organic Frameworks as Receptors for Anions.

Anion recognition by neutral hosts that function in aqueous solution is an emerging area of interest in supramolecular chemistry. The design of neutral architectures for anion recognition still remains a challenge. Among neutral anion receptor systems, urea and its derivatives are considered as "privileged groups" in supramolecular anion recognition, since they have two proximate polarized N-H bonds exploitable for anion recognition.

A practical base mediated synthesis of 1,2,4-triazoles enabled by a deamination annulation strategy.

A rapid and efficient base mediated synthesis of 1,3,5-trisubstituted 1,2,4-triazoles has been developed using the annulation of nitriles with hydrazines, which can be expanded to a wide range of triazoles in good to excellent yields. Ammonia gas is liberated during the reaction, and halo and hetero functional groups as well as free hydroxyl and amino groups are tolerated in this transformation. A variety of alkyl and aryl-substituted nitriles can be functionalized with aromatic and aliphatic hydrazines employing this procedure.

All-Carboxylate-Protected Superatomic Silver Nanocluster with an Unprecedented Rhombohedral Ag Core.

We report the synthesis and structure of the first all-carboxylate-protected superatomic silver nanocluster. It was prepared by heating a dimethylformamide solution of perfluoroglutaric acid and AgNO under alkaline conditions, yielding a single crystal of [(CH)NH][Ag(pfga)]. The [Ag(pfga)] cluster has a rhombohedral Ag core, with each of its faces protected by one dianionic perfluoroglutarate (pfga) ligand.

Base-mediated cascade amidination/N-alkylation of amines by alcohols.

A base-mediated cascade amidination/N-alkylation reaction of amines by alcohols has been developed. For the first time, nitriles have been identified as an efficient and benign water acceptor reagent in N-alkylation. Notably, the procedure tolerates a series of functional groups, such as methoxyl, halo, vinyl and hetero groups, providing a convenient method to construct different substituted diamino compounds, N labeled amine and could be scaled up to 1 mol scale offering 138.

Rapid access to 3-aminoindazoles from nitriles with hydrazines: a strategy to overcome the basicity barrier imparted by hydrazines.

A practical and efficient base mediated synthesis of free 3-aminoindazoles has been developed from the reaction of nitriles with hydrazines, which successfully overcomes the difficulty of using aromatic hydrazines as substrates and allows for the synthesis of a wide range of N-aryl substituted free 3-aminoindazoles in moderate to excellent yields under mild conditions in one-pot. This finding provides a rapid and useful strategy for the synthesis of various functionalized 3-aminoindazole derivatives.

Comparative Study of the Supercapacitive Performance of Three Ferrocene-Based Structures: Targeted Design of a Conductive Ferrocene-Functionalized Coordination Polymer as a Supercapacitor Electrode.

As redox-active based supercapacitors are known as highly desirable next-generation supercapacitor electrodes, the targeted design of two ferrocene-functionalized (Fc(COOH) ) clusters based on coinage metals, [(PPh ) AgO CFcCO Ag(PPh ) ] ⋅7 CH OH (SC : super capacitor) and [(PPh ) CuO CFcCO Cu(PPh ) ]⋅3 CH OH (SC ), is reported. Both structures are fully characterized by various techniques. The structures are utilized as energy storage electrode materials, giving 130 F g and 210 F g specific capacitance at 1.

Hexavalent Octahedral Template: A Neutral High-Nucleus Silver Alkynyl Nanocluster Emitting Infrared Light.

The first silver nanocluster with an octahedral template of TeO was synthesized as a neutral 36-nucleus nanocluster, and its structure was demonstrated using single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, electrospray ionization mass spectrometry, and X-ray photoelectron spectroscopy. The peripheral ligands of the cagelike skeleton of the nanocluster are CFCOO and BuC≡C. During the synthesis, the TeO template arranged the nanocluster, and a 36-nucleus nanocluster was formed.

Synthesis, Characterization and DNA Binding Investigations of a New Binuclear Ag(I) Complex and Evaluation of Its Anticancer Property.

Aim: A new Ag(I) complex (A) was synthesized and evaluated for its anticancer activity against human cancer cell lines.

Materials And Methods: The complex A was characterized by H, C, and P nuclear magnetic resonance (NMR), infrared (IR) spectra, elemental analysis, and X-ray crystallography. The interaction of the complex with CT-DNA was studied by electronic absorption spectra, fluorescence spectroscopy, and cyclic voltammetry; cell viability (%) was assessed by absorbance measurement of the samples.

High capacity Hg(II) and Pb(II) removal using MOF-based nanocomposite: Cooperative effects of pore functionalization and surface-charge modulation.

Water pollution by heavy metal ions especially Hg(II) and Pb(II) is one of the most important concerns because of their harmful effects on human health and environment sustainability. Here, we developed FeO@TMU-32 metal-organic framework (MOF)-based nanocomposite by applying pore functionalization and surface-charge modulation strategies. Based on synergic effects of these strategies, FeO@TMU-32 nanocomposite shows very high capacity toward Hg(II) and Pb(II) metal ions.

Ultrasonic-assisted fabrication of thin-film electrochemical detector of HO based on ferrocene-functionalized silver cluster.

A novel ferrocene-functionalized silver cluster (FcAgCs) has been designed and synthesized with the assistant of ultrasound treatment and fully characterized by single crystal spectroscopy, IR, UV-Vis, XRD, TGA, NMR, CV and elemental analyses. Ultrasound synthesis method facilitates and accelerates synthesis of this amazing structure and plays a vital role in the synthesis of this special cluster. Single-crystal X-ray analysis reveal that the cluster can be described as a cationic [(dppf)Ag(CCBu)(CHOH)] (dppf = 1,1'-bis(diphenylphosphino)ferrocene) species consisted of four rhombic silver atom and two isolated BF counter anions.

Trivalent Tetrahedral Anion Template: A 26-Nucleus Silver Alkynyl Cluster Encapsulating Vanadate.

In order to study the charge effect on the formation of an anion-templated silver cluster, a trivalent tetrahedral anion was incorporated into the silver assembly. A 26-nuclear silver cluster was prepared, and its structure was confirmed by single-crystal X-ray diffraction. Also, the resulting structure was characterized by powder X-ray diffraction data.

Ultrasonic-assisted synthesis and DNA interaction studies of two new Ru complexes; RuO nanoparticles preparation.

Aim: To study of the interactions of two new ruthenium(II) complexes (C1 and C2) with calf thymus (CT)-DNA; production of RuO nanoparticles using the complexes precursor.

Materials & Methods: Complex C1 was characterized by x-ray crystallography. The binding of the complexes with (CT)-DNA was studied using techniques that include electronic absorption spectra, fluorescence and redox behavior.

The quality of total mesorectal excision specimen: A review of its macroscopic assessment and prognostic significance.

As a surgical procedure which could significantly lower the recurrence rate of cancers, total mesorectal excision (TME) has been the gold standard for middle and lower rectal cancer treatment. However, previous studies have shown that the procedure did not achieve the ideal theoretical local recurrence rates of rectal cancers. Some researchers pointed out it was very likely that not all so-called TME treatments completely removed the mesorectum, implying that some of these TME surgical treatments failed to meet oncological quality standards.

Sonochemical effect on two new Ruthenium(II) complexes with ligand (E)-N-((6-bromopyridin-2-yl)methylene)-4-(methylthio)aniline precursors for synthesis of RuO nanoparticles.

Two novel Ru(II) complexes [(η-p-cymene)RuCl(L2)]PF (R2) and [(η-CH)RuCl(L2)]PF (R4), with ligand (E)-N-((6-bromopyridin-2-yl)methylene)-4-(methylthio)aniline (L2), were synthesized and characterized by elemental analysis, H NMR, C NMR and IR spectroscopy. Based on X-ray crystallography studies, complexes R2 and R4 have coordination environments with formulated (η-p-cymene)Ru(NCl) and (η-CH)Ru(NCl), respectively. The thermal stabilities of compounds R2 and R4 were studied by thermal gravimetric (TG) and differential scanning calorimetry (DSC).