Abstract Chlorite dismutase is a unique heme enzyme that catalyzes the conversion of chlorite to chloride and molecular oxygen. The enzyme is highly specific for chlorite but has been known to bind several anionic and neutral ligands to the heme iron. In a pH study, the enzyme changed color from red to green in acetate buffer pH 5.0. The cause of this color change was uncovered using UV–visible and

In this work, lithium slag based geopolymer (LSG) mortar with excellent properties was successfully produced by a strategy of pre-calcination at room temperature curing. Which eliminated the limits of application scenarios of geopolymer acquired elevating curing temperature. Meanwhile, the setting controlling of LSG was investigated by adjusting activator and addition of sodium tetraborate as a retarder

Halloysite is a hydrated polymorph of kaolinite but possesses a distinctive nanosized tubular structure and surface reactivity. The microstructure and mechanical performance of geopolymers derived from calcined halloysite via acid-activation were investigated in this study. The acid-activation products were characterized using a combination of techniques including X-ray diffraction (XRD), Fourier-transform

This paper addresses a new design of steel fibre reinforced ultra-high performance concrete (UHPC) composites by implanting the fibres into modified Andreasen and Andersen (MAA) particle packing model. A novel method for determining the equivalent spherical diameter of steel fibres is proposed, which preserves the effect on the wet particle packing of an UHPC system, when there are equal volume fractions

Ultra-high performance concrete (UHPC) has been recently developed as an innovative cementitious-based material, which exhibits excellent tensile and compressive strengths, as well as long-term durability. However, information regarding shrinkage-induced stress development in a composite system of UHPC-reinforced concrete (RC) is limited. The objective of the present research is to identify the restrained

Lithium-sulfur battery received extensive attentions worldwide due to the abundant sulfur and high energy density (about 2.6 kW h/kg). However, its practical applications were hindered by its poor electronical conductivity, the shuttle effect and sluggish redox kinetics of the soluble lithium polysulfides (LiPS). In this work, graphene decorated with hetero-Co9S8-NiS sheets (BMS-G) was employed as

Cathode materials in potassium ion batteries (KIBs) generally exhibit low charge storage capabilities when compared with cathode materials implemented in lithium or sodium ion batteries. In this work, K0.78Fe1.60S2 is described as a high capacity KIB cathode that exhibits mixed anion/cation redox behaviors during charge/discharge (C/D). When charged to 3.2 V vs. K/K+, K+ extraction occurs along with

Structurally ordered intermetallic borides are a large family of inorganic solids with rich bonding schemes, huge compositional and structural diversity. The family members possess high flexibility to modulate the local electronic structures and surface adsorption properties, providing great opportunities for the development of advanced catalysts with superior activity and stability. In this review

Lanthanide (Ln) high-nuclearity clusters express charming structures and extensive potential applications, nevertheless the progress of successfully obtaining Ln clusters is still untoward. Herein, two fascinating and classical 60-metal configurations were obtained based on mixed-lanthanide and solvothermal conditions, formulated [Ln60(CO3)8(μ3-OH)96(H2dmp)24(Hdmp)12] Br12(NO3)8(CH3OH)x(H2O)y (abbreviated

The S-doped biomorphic SnO2 were synthesized using biomass carbon as template. The biomorphic SnO2 copied the structure of biomass morphology. After in-situ growth of hexagonal or semi-hexagonal SnS2 on biomorphic SnO2, the structure of bio-template remained. This method is simple, eco-friendly, and cost-efficient. The S-termination of SnS2 can effectively react with NO2 and thereby improving gas-sensitivity

Small pore zeolites, due to pore size constraint, have limited applications. Post-modification on the materials is therefore important to widen their use. A CHA-type zeolite (SSZ-13) with unique sponge-like structure is obtained by fluoride leaching. The development of macroporosity started from the crystal surfaces and continued progressively into the crystal by prolonging treatment. Nitrogen physisorption

In this work, an effective vapor ammonization-electroreduction stratergy is developed to fabricate a surface-reconstructed and N-coordinated Zn electrocatalyst (Zn-N), which exhibits a high electrocatalytic activity and stability for CO2 reduction to CO with a Faradaic efficiency (FE) of 85.6% at -0.91 V vs. reversible hydrogen electrode (RHE), largely outperforming Zn foil and surface-reconstructed

Sometimes coined half-porphyrins, the bis-pyrrolic dipyrrin ligands endow their metal complexes with unique properties such as the potential to functionalize the heterocyclic backbone or the meso position as well as the ability to catalyze interesting chemical transformations. Thus, strategies towards the derivatization of or at the meso group and the use of dipyrrin metal complexes for the formation

N-heterocyclic carbenes (NHCs) are a class of molecules with lone pair of carbene electrons, thus having the ability to activate CO2 to form imidazolium carboxylates. Incorporation of activated, metal-free NHC moieties into metal-organic frameworks (MOFs) without decomposition of metal-carboxylate coordination is highly desired, owing to the high CO2 affinity and versatile chemical functionalities

Highly emissive copper(I) halide nanoclusters having thermally activated delayed fluorescence (TADF) have been paid much attention, but rarely reported so far. Here, a hexanuclear copper(I) iodide cluster containing tridentate N˄P˄N ligand, [Cu6I6(ppda)2] {ppda = 2-[2-(dimthylamino)phenyl(phenyl)phosphino]-N,N-dimethylaniline}, was synthesized. All six copper atoms are four-coordinate, including four

Ten new ternary fluorooxoborate structures (B2O2F2, Ⅰ-Ⅹ) were obtained from first-principles prediction. Coplanar aligned triangle structure units [BO2F]2- and [BOF2]- like [BO3]3- in borates were found from the computational simulation. We identified new covalent coordination patterns of the F atom connected with the B atoms which are located in the bridging site, -B--F--B-. Besides, one molecular

We report the hydrothermal synthesis and characterization of two uranyl-oxide hydroxyl- hydrate compounds with Pr(III) (U-Pr) and Tb(III) (U-Tb) ions prepared via direct hydrothermal reactions of lanthanide (Ln = Pr or Tb) ions with a uranyl-oxide hydroxy-hydrate phase, schoepite. Both compounds U-Pr and U-Tb show thin plate morphologies with an atomic ratios of 2 (U : Pr) and 6 (U : Tb) and have been

Plasmas in contact with liquids are the green chemistry method for the synthesis of metal oxides. Underwater plasma was used for the synthesis of molybdenum and tungsten oxides. Obtained samples were analyzed by various techniques. Results showed that underwater plasma with Mo electrodes allows obtaining the non-stoichiometric molybdenum oxide (MoOx). In the case of tungsten electrodes, the monoclinic

MXene, as a novel graphene-like nanomaterial, has been found exhibiting good flame-retardant and smoke-suppression effect for polymers recently, mainly attributed to physical barrier effect of 2D nanosheets. However, chemical component as another important factor has not been investigated in detail. To address that, MXene (Ti3C2Tx) and MAX (Ti3AlC2) were introduced into unsaturated polyester resin

Owing to their environmental-friend characteristic, InP-based quantum dots (QDs) showed great potential in various fields as an alternative to Cd-based QDs. However, the current mainstream synthesis method, (TMS)3P-based injection method, still faces many challenges, such as high cost of (TMS)3P and complex temperature control. In contrast, solvent-thermal method is considered to be more feasible and

This report describes the first example of the generation of composition‐defined bimetallic Mo‐Pt sub‐nanosized particles. UV‐vis titration experiments were carried out in order to control the mole ratio of Mo and Pt using a phenylazomethine dendrimer as a molecular template. After supporting the assemblies onto the carbon support, reductive calcination under an atmosphere of H 2 afforded the samples

Diverse reactivity profile of a‐diimine analogues, di/tetrahydro‐bisisoquiniline (L1‐2H/L2‐4H) and biimidazopyridine (L3) have been illustrated on {Ru(acac)2} platform (acac=acetylacetonate). Increasing Lewis acidity on coordination to {Ru(acac)2} as well as fine tuning of ligand backbone led to oxidative dehydrogenation of L1‐2H/L2‐4H to yield metallated bisisoquinoline (BIQ) and unexplored C‐C c

Three novel bicycloazastannoxides, namely, [ n‐ Bu 2 Sn(L 1 )] ( 1 ), [ n ‐Bu 2 Sn(L 2 )] ( 2 ) and [Bz 2 Sn(L 3 )] ( 3 ) were synthesized in one pot procedures by reacting diorganotin(IV) precursors with a mixture composed of an α ‐amino acid with either ( E )‐2‐hydroxy‐5‐((4‐nitrophenyl)diazenyl)benzaldehyde or ( E )‐2‐hydroxy‐5‐(phenyldiazenyl)benzaldehyde. Single‐crystal X‐ray diffraction analysis

Catechol is a bidentate ligand for metal coordination which is well suited for the formation of helicates and related metallosupramolecular complexes. In here, the 25 years of self‐assembly and stereochemistry of helicates based on catechol ligands is discussed. Unsaturated, heteronuclear and hierarchical helicates as well as molecular switches based on catecholate helicates are discussed.

The first “naked” (Lewis base‐free) cationic Ca amidinate complex [ t BuAmDIPPCa(C6H6)]+[B(C6F5)4]− could be prepared in 62% yield ( t BuAmDIPP = tBuC(N‐DIPP)2; DIPP = 2,6‐diisopropylphenyl) by reaction of [ t BuAmDIPPCaH]2 with [Ph3C]+[B(C6F5)4]− in chlorobenzene. The ether‐free complex t BuAmDIPPCaN(SiMe3)2 was obtained by removal of diethylether from its ether adduct. Crystal structures show that

In this review, we gather a great deal of information about magnetic nanocomposites, which are made from the combination of Fe 3 O 4 magnetic nanoparticles (MNPs) and metal‐organic frameworks (MOFs). Due to the high saturation magnetization, biocompatibility, low toxicity, stability, and cost‐effectiveness, MNPs have attracted a lot of interest in recent years. Furthermore, MOFs, which are porous materials

The introduction of a simple triazole moiety on a terpyridine ligand in the complex [Ru(tpy)(bpy)(Cl)]+ ([1]+; tpy = 2,2':6',2''‐terpyridine; bpy = 2,2'‐bipyridine) gives rise to a suitable electrocatalyst for the reduction of CO2 to CO. The triazole group in [Ru(tpyaz)(bpy)(Cl)]+ ([2]+; tpyaz = 4'‐(4‐(t‐butylphenyl)‐1H‐1,2,3‐triazol‐4‐yl)‐2,2':6',2''‐terpyridine) enables the complex [2]+ to bind with