In the search for new magnetic topological insulators with strong spin-orbit coupling, by following conceptual considerations that have already proven to be suitable, the bismuth-rich subiodide Mn[PtBiI] was discovered. Single crystals were grown from mixtures of the elements and BiI using a temperature program developed on the basis of thermal analyses. Single-crystal X-ray diffraction revealed a rhombohedral structure of the cuboctahedral cluster anions [PtBiI], which are linked into chains via octahedrally coordinated Mn cations.
View Article and Find Full Text PDFReacting REO and HBO in an ultra-alkaline NaOH hydroflux at about 250 °C yielded pure, crystalline samples of Na[RE(BO)(OH)] (RE=Y, Gd-Er). The compounds dehydrate to NaRE(BO) upon heating in air to about 500 °C. Na[RE(BO)(OH)] (RE=Tb-Er) are photoluminescent under UV radiation.
View Article and Find Full Text PDFMelanoma is a skin cancer that arises from melanocytes and can spread quickly to the other organs of the body, if not treated early. Generally, melanoma shows an inherent resistance to conventional therapies. In this regard, new potential drugs are being developed as possible treatments for melanoma.
View Article and Find Full Text PDFOne-dimensional (1D) perovskites (perovskitoids) occupy an important place among modern semiconducting materials, offering design flexibility together with a wide range of properties. However, most such materials have a large bandgap, which limits their application in photovoltaics. Here, we present a new 1D hybrid perovskite containing the functional cation aminophenyl viologen (APhV).
View Article and Find Full Text PDFThe dark red semiconductor Cu(SbS)Cl was obtained by leaching the layered precursor Cu(SbS)[AlCl] in a 0.1 M aqueous HCl solution. The selective extraction of AlCl yielded a mica-like lamellar product of poor crystallinity.
View Article and Find Full Text PDFBismuth oxide iodide (BiOI) has been viewed as a suitable environmentally-friendly alternative to lead-halide perovskites for low-cost (opto-)electronic applications such as photodetectors, phototransistors and sensors. To enable its incorporation in these devices in a convenient, scalable, and economical way, BiOI thin films were investigated as part of heterojunctions with various p-type organic semiconductors (OSCs) and tested in a field-effect transistor (FET) configuration. The hybrid heterojunctions, which combine the respective functionalities of BiOI and the OSCs were processed from solution under ambient atmosphere.
View Article and Find Full Text PDFSynthesizing intermetallic phases containing noble metals often poses a challenge as the melting points of noble metals often exceed the boiling point of bismuth (1560 °C). Reactions in the solid state generally circumvent this issue but are extremely time consuming. A convenient method to overcome these obstacles is the co-reduction of metal salts in polyols, which can be performed within hours at moderate temperatures and even allows access to metastable phases.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2024
Wide applications of anhydrous rare-earth (RE) trichlorides RECl in organometallic chemistry, for the synthesis of optical and magnetic materials, and as catalysts require a facile approach for their synthesis. The known methods use or produce toxic substances, are complicated and have limited reliability and upscaling. It has been shown that task-specific ionic liquids (ILs) can dissolve many metal oxides without special reaction conditions at moderate temperature, making the metals accessible to downstream chemistry.
View Article and Find Full Text PDFAdv Sci (Weinh)
January 2024
Zinc ion hybrid capacitors suffer from lack of reversibility and dendrite formation. An electrolyte, based on a solution of a zinc salt in acetonitrile and tetramethylene sulfone, allows smooth zinc deposition with high coulombic efficiency in a Zn||stainless steel cell (99.6% for 2880 cycles at 1.
View Article and Find Full Text PDFThe applicability of a deep eutectic solvent (DES) consisting of betainium hydrochloride, urea and glycerol is examined with respect to ionometallurgical metal extraction and compared with the ionic liquid (IL) betainium bis(trifluoromethylsulfonyl)imide ([Hbet][NTf ]). The DES dissolves numerous metal oxides, where not only betaine and chloride act as stabilizing ligands, but also nascent ammonia seems to be essential. From such solutions, cobalt, copper, zinc, tin, lead, and even vanadium can be electrodeposited, demonstrating the feasibility of ionometallurgy.
View Article and Find Full Text PDFOver the past century, Black American scholars have designed, applied, and promoted conceptual frameworks and research models that propose nuanced understandings of psychological development. This article highlights examples of their contributions to understanding the differential impact of diverse contextual and situational factors. Through examinations of the psychological effects of Blackness on the development of cognition, competence, identity, and social functioning, Black psychologists outline pathways and provide tools for ecological culturally rooted methodologies.
View Article and Find Full Text PDFIn search of a suitable single-source precursor for the deposition of nanostructured PbS thin films at moderate temperatures under ambient conditions, we have synthesized the ligand N-(thiomorpholine-4-carbothioyl)benzamide and its corresponding lead(II) complex. The structures of both compounds were determined by single-crystal X-ray diffraction. In the complex, two ligands coordinate to a lead(II) atom in hemi-directed geometry through S and O atoms.
View Article and Find Full Text PDFOwing to the environmental problems of numerous metal production processes, there is a growing need for more energy-efficient approaches. Cobalt is considered a strategic element that is extracted not only from ores but also from spent Li-ion batteries. One promising new approach is ionometallurgy, which is the extraction of metal oxides by ionic liquids (ILs).
View Article and Find Full Text PDFSocial inequalities and human rights are inevitably linked to children's and adolescents' healthy development. Children who experience structural and interpersonal inequalities in access to resources and opportunities based on their gender, race, ethnicity, or other group categories are denied the right to fair treatment. We assert that investigating the that children hold regarding inequalities and human rights is necessary for creating fair and just societies.
View Article and Find Full Text PDFConsolidating a microscopic understanding of magnetic properties is crucial for a rational design of magnetic materials with tailored characteristics. The interplay of 3d and 4f magnetism in rare-earth transition metal antimonides is an ideal platform to search for such complex behavior. Here the synthesis, crystal growth, structure, and complex magnetic properties are reported of the new compound Pr Fe Sb as studied by magnetization and electrical transport measurements in static and pulsed magnetic fields up to 56 T, powder neutron diffraction, and Mößbauer spectroscopy.
View Article and Find Full Text PDFThe synthesis of intermetallic phases formed from elements with very different melting points is often time and energy consuming, and in extreme cases the evaporation of a reactant may even prevent formation completely. An alternative, facile synthesis approach is the reduction of metal salts in the polyol process, which requires only moderate temperatures and short reaction times. In addition, the starting materials for this procedure are readily available and do not require any special treatment to remove or prevent passivation layers, for example.
View Article and Find Full Text PDFGrowth of dendrites, limited coulombic efficiency (CE), and the lack of high-voltage electrolytes restrict the commercialization of zinc batteries and capacitors. These issues are resolved by a new electrolyte, based on the zinc(II)-betaine complex [Zn(bet) ][NTf ] . Solutions in acetonitrile (AN) avoid dendrite formation.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
June 2022
Crystal structure data for potassium orthoselenate(IV), KSeO, are reported for the first time. Colorless, block-shaped crystals were grown in a potassium hydro-flux, under ultra-alkaline conditions, within 10 h. KSeO crystallizes isostructural with NaSO and KTeO in the trigonal space group with lattice parameters = 6.
View Article and Find Full Text PDFWhile a negative oxidation state occurs rarely for metals in general, this is commonly known for metal carbonyl anions, carbonyl metalates. Although CO and CN are isoelectronic, cyanidometalates usually do not exhibit metal centers with negative oxidation states. However, we report on the electron-rich tetrahedral tetracyanidoferrate(-II) anion [Fe(CN)], which was stabilized in (SrN)[Fe(CN)] (space group 3, = 702.
View Article and Find Full Text PDFZinc electrodeposition is currently a hot topic because of its widespread use in rechargeable zinc-air batteries. However, Zn deposition has received little attention in organic solvents with much higher ionic conductivity and current efficiency. In this study, a Zn-betaine complex is synthesized by using ZnO and betainium bis[(trifluoromethyl)sulfonyl]imide and its electrochemical behavior for six organic solvents and electrodeposited morphology are studied.
View Article and Find Full Text PDFClean air is an indispensable prerequisite for human health. The capture of small toxic molecules requires the development of advanced materials for air filtration. Two-dimensional nanomaterials offer highly accessible surface areas but for real-world applications their assembly into well-defined hierarchical mesostructures is essential.
View Article and Find Full Text PDFIonic liquids (ILs), especially task-specific ILs, are capable of dissolving various solids at moderate temperatures without the need for special reaction vessels. Direct synthesis of binary sulfides of B, Bi, Ge, Mo, Cu, Au, Sn, In, Ti, V, Fe, Co, Ga, Ni, Al, Zn, and Sb in [P]Cl was tested at 100 °C, below the melting point of sulfur. Under these conditions, substantial sulfide formation occurred only for nickel (NiS, NiS, NiS) and copper (CuS, CuS).
View Article and Find Full Text PDFSocial justice refers to promoting fairness, equality, equity and rights across multiple aspects of society, including economic, educational, and workforce opportunities. A number of scholars across academia have called for a greater incorporation of social and racial justice approaches to the field of human development, and have asserted that social justice constitutes both a theoretical framework as well as a set of hypotheses to investigate and understand the human condition. The emergence, experience, and awareness of social injustice has to be much better understood from a psychological and developmental perspective.
View Article and Find Full Text PDFElemental tellurium readily dissolves in ionic liquids (ILs) based on tetraalkylphosphonium cations even at temperatures below 100 °C. In the case of ILs with acetate, decanoate, or dicyanamide anions, dark red to purple colored solutions form. A study combining NMR, UV-Vis and Raman spectroscopy revealed the formation of tellurium anions (Te ) with chain lengths up to at least n=5, which are in dynamic equilibrium with each other.
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