Assembling the Puzzle of Coparsite Polymorphism: Synthesis, Thermal Expansion, and Quantum Magnetism of α- and β-CuO(VO)Cl.

Two new dimorphic spin-1/2 quantum magnets, α- and β-CuO(VO)Cl, were synthesized via a chemical vapor transport method that emulates mineral formation in volcanic fumaroles. α-CuO(VO)Cl () is a pure vanadate analogue of the coparsite mineral characterized by [OCu] 1 single rods, whereas β-CuO(VO)Cl () adopts a new structure type with the [OCu] 2 layered topology. The thermal expansions of both and studied by high-temperature single-crystal X-ray diffraction are reported.

The AM-4 Family of Layered Titanosilicates: Single-Crystal-to-Single-Crystal Transformation, Synthesis and Ionic Conductivity.

Flexible crystal() structures, which exhibit() single-crystal()-to-single-crystal() (SCSC) transformations(), are attracting attention() in many applied aspects: magnetic() switches, catalysis, ferroelectrics and sorption. Acid treatment() for titanosilicate material() AM-4 and natural() compounds with the same structures led to SCSC transformation() by loss() Na, Li and Zn cations with large structural() changes (20% of the unit()-cell() volume()). The conservation() of crystallinity through complex() transformation() is possible due() to the formation() of a strong hydrogen bonding() system().

Unusual Effects of the Metal Center Coordination Mode on the Photophysical Behavior of the Rhenium(I) and Rhenium(I)-Iridium(III) Complexes.

Binuclear transition-metal complexes based on conjugated systems containing coordinating functions are potentially suitable for a wide range of applications, including light-emitting materials, sensors, light-harvesting systems, photocatalysts, etc., due to energy-transfer processes between chromophore centers. Herein we report on the synthesis, characterization, photophysical, and theoretical studies of relatively rare rhenium(I) and rhenium(I)-iridium(III) dyads prepared by using the nonsymmetrical polytopic ligands ( and ) with the strongly conjugated phenanthroline and imidazole-quinoline/pyridine coordinating fragments.

Ferrimagnetic and spin glass behaviour in SrMnTiMO (M = Ti and Fe) synthetic crichtonites.

Novel SrMnTiMO (M = Ti and Fe) compounds with a crichtonite-type structure are reported herein. M = Ti shows a ferrimagnetic behavior at = 15 K, while M = Fe creates a ferromagnetic cluster-glass at = 8 K positional disorder. This family offers a promising magnetic playground.

(CNH)[FeFe(SO)(HO)]: A Framework Iron Sulfate with a Mixed = 2 and = 5/2 Honeycomb Lattice.

A new guanidinium-templated hydrated iron sulfate, [CNH][FeFe(SO)(HO)] (), was prepared from strongly acidic aqueous solutions. Its crystal structure is comprised from FeO and FeO(HO) octahedra linked by sulfate bridges forming a [FeFe(SO)(HO)] 3 framework with a layer-by-layer ordering of ferric and ferrous cations. The structural topology of the framework is related to the anhydrous rhombohedral mikasaite Fe(SO).

2 + 1 Tricarbonyl Complexes of Technetium(I) with a Combination of ,-Bidentate Ligands and Ethyl Isocyanoacetate: How Strong Is the Interfering Effect of Chloride Ions on Their Formation?

Technetium(I) 2 + 1 tricarbonyl complexes with a combination of ,-bidentate ligands (2,2'-bipyridine, bipy; 1,10-phenanthroline, phen) and ethyl isocyanoacetate were prepared and characterized by NMR, IR, UV/visible, and luminescence spectroscopies and by high-performance liquid chromatography (HPLC). The crystal structures of [Tc(CO)(bipy)(CNCHCOOEt)](ClO) (in the form of a solvate with 0.5CHCl) and [Tc(CO)(phen)(CNCHCOOEt)](ClO) (in the form of an adduct with an outer-sphere phen molecule) were determined by single-crystal X-ray diffraction.

Organically Templated Uranyl Sulfates and Selenates: Structural Complexity and Crystal Chemical Restrictions for Isotypic Compounds Formation.

This paper reviews the state of the art in the structural chemistry of organically templated uranyl sulfates and selenates, which are considered as the most representative groups of U-bearing synthetic compounds. In total, there are 194 compounds known for both groups, the crystal structures of which include 84 various organic molecules. Structural studies and topological analysis clearly indicate complex crystal chemical limitations in terms of the isomorphic substitution implementation, since the existence of isotypic phases has to date been confirmed only for 24 compounds out of 194, which is slightly above 12%.

Evolution of Chernobyl Corium in Water: Formation of Secondary Uranyl Phases.

Two crystalline phases, which are analogues of common secondary uranyl minerals, namely, becquerelite (Ca[(UO)O (OH)]·8HO) and phurcalite (Ca[(UO)O (PO)]·7HO) were identified on the surface of a Chernobyl corium-containing sample affected by hydrothermal alteration in distilled water at 150 °C for one year. Phases were characterized using Single-Crystal X-ray Diffraction Analysis (SCXRD) as well as optical and scanning electron microscopy. Features of the structural architecture of novel phases, which come from the specific chemical composition of the initial fragment of Chernobyl sample, are reported and discussed.

Experimental and Theoretical Quantitative Studies of the Hydrogen Bonding Basicity of 2,5-Disubstituted Tetrazoles and Some Related Heterocycles.

The tetrazole cycle is a well-known pharmacophore fragment that is part of the structure of a large number of biologically active compounds, including drugs. The diverse biological properties of such heterocylic systems and related compounds are largely determined by their ability to form strong hydrogen bonds with the targets. However, quantitative data on the hydrogen bonding of such heterocycles are limited.

Framework Uranyl Silicates: Crystal Chemistry and a New Route for the Synthesis.

To date, uranyl silicates are mostly represented by minerals in nature. However, their synthetic counterparts can be used as ion exchange materials. A new approach for the synthesis of framework uranyl silicates is reported.

Crystal Chemistry of the Copper Oxalate Biomineral Moolooite: The First Single-Crystal X-ray Diffraction Studies and Thermal Behavior.

Moolooite, Cu(CO)·HO, is a typical biomineral which forms due to Cu-bearing minerals coming into contact with oxalic acid sources such as bird guano deposits or lichens, and no single crystals of moolooite of either natural or synthetic origin have been found yet. This paper reports, for the first time, on the preparation of single crystals of a synthetic analog of the copper-oxalate biomineral moolooite, and on the refinement of its crystal structure from the single-crystal X-ray diffraction (SCXRD) data. Along with the structural model, the SCXRD experiment showed the significant contribution of diffuse scattering to the overall diffraction data, which comes from the nanostructural disorder caused by stacking faults of Cu oxalate chains as they lengthen.

Reactivity of Yellow Arsenic towards Cyclic (Alkyl)(Amino) Carbenes (CAACs).

Different cyclic (alkyl)(amino)carbenes (CAACs) were reacted with yellow arsenic. Several products [(CAAC-n) (μ,η -As )] (n=1 (1), 4 (2)), [(CAAC-2) (μ ,η -As )] (3) and [(CAAC-3) (μ ,η - As )] (6) were isolated due to the differing steric properties of CAAC-1-4. The products contain As , As or As units and represent the first examples of CAACs-substituted products of yellow arsenic.

-Benzylethanolammonium Ionic Liquids and Molten Salts in the Synthesis of Ga- and AlF-Labeled Radiopharmaceuticals.

Ionic liquids (ILs), due to their structural features, have unique physical and chemical properties and are environmentally friendly. Every year, the number of studies devoted to the use of ILs in medicine and pharmaceutics is growing. In nuclear medicine, the use of ILs with self-buffering capacity in the synthesis of radiopharmaceuticals is extremely important.

Effect of Fe-Doping on Thermal Expansion and Stability of Bismuth Magnesium Tantalate Pyrochlorere.

A continuous series of solid solutions (BiMgFeTaO (x = 0-0.75)) with the pyrochlore structure were synthesized with the solid-phase method. It was shown that iron, like magnesium, is concentrated in the structure in the octahedral position of tantalum.

One of Nature's Puzzles Is Assembled: Analog of the Earth's Most Complex Mineral, Ewingite, Synthesized in a Laboratory.

Through the combination of low-temperature hydrothermal synthesis and room-temperature evaporation, a synthetic phase similar in composition and crystal structure to the Earth's most complex mineral, ewingite, was obtained. The crystal structures of both natural and synthetic compounds are based on supertetrahedral uranyl-carbonate nanoclusters that are arranged according to the cubic body-centered lattice principle. The structure and composition of the uranyl carbonate nanocluster were refined using the data on synthetic material.

Chemical Vapor Transport Synthesis of Cu(VO)(AsO) With Two Distinct Spin-1/2 Magnetic Ions.

A new copper vanadyl arsenate, Cu(VO)(AsO), was synthesized via the chemical vapor transport method. Cu(VO)(AsO) adopts an original structure type. It is characterized by layers formed by edge-sharing and corner-sharing V-centered octahedra resulting in a unique topology that was hitherto not reported for vanadates.

New species of the genus Lethrus Scopoli, 1777 (Coleoptera: Geotrupidae: Lethrinae) from Fergana Valley, Kyrgyzstan.

Lethrus (Autolethrus) toropovi Shapovalov, new species is described from the north of the Fergana Valley (Kyrgyzstan, central part of the Chatkal Mountain Range). New species is characterized within the Lethrus sulcipennis-group by the characters of the mandibular processes.

Pediatric chordoma associated with tuberous sclerosis complex: A rare case report with a thorough analysis of potential therapeutic molecular targets.

Chordoma associated with tuberous sclerosis complex (TSC) is an extremely rare tumor that was described only in 13 cases since 1975. Сhordoma itself is a malignant slow-growing bone tumor thought to arise from vestigial or ectopic notochordal tissue. Chordoma associated with TSC differs from chordoma in the general pediatric population in the median age, where the diagnosis of TSC-associated chordoma is 6.

Method of manufacturing and staining microplastics for using in the biological experiments.

Nowadays, plastic pollution attracts much attention both from society and scientists. The plastic pollution impact on the environment and human health requires assessment urgently, especially through experimental studies. However, such studies are still scarce because of the lack of standard methods for assessing their effects on living organisms.

Emergence of Gun Violence as a Patient Priority.

Purpose: Gun violence is a growing public health epidemic that disproportionately affects underserved and minority communities. Our study sought to document patient experiences of community gun violence as a theme that emerged in the context of interviews exploring community-level factors influencing patients' engagement in primary care within the context of a larger study on cardiovascular health.

Methods: We completed semistructured qualitative interviews of individuals with uncontrolled hypertension recruited from primary care practices serving underserved communities in metro Richmond, Virginia that were participating in a larger study on improving cardiovascular health.

Exploring new belousovite-related zinc and cadmium alkali sulfate halides: synthesis and structural variability.

Fourteen new belousovite-related compounds, AZn(TO)X (A = K, Rb, Cs, Tl, NH; T = S, Se; X = Cl, Br, I) have been prepared via melt and evaporation techniques by reacting AX and ZnTO either at high temperatures or in hot aqueous solutions. They adopt the layered structure of the belousovite archetype, and constitute a morphotropic series. The apophyllite-type layers in these structures undergo different corrugations, most pronounced in the case of CsZn(SO)I.

Intravenouse immunoglobuline in dysautonomia.

Nowadays intravenous immunoglobulin (IVIg) treatment is considered to play a promising role in the autoimmune disease therapy. Despite its significant beneficial effects, the precise mechanism of action needs further studies, as well as recommended dosage in the treatment of autoimmune dysautonomia. In some diseases, like Guillain-Barre syndrome (GBS) and chronic inflammatory demyelinating neuropathy (CIDP), IVIg has a strong evidence that allows to recommend and prescribe the medication, while in other diseases only single case studies are available that requires further research.

Morphotropism in fumarolic mineral-related anhydrous sulfates: novel representatives in AM(SO) and AM(SO) series.

The discovery of numerous endemic anhydrous sulfate minerals in fumaroles of the Tolbachik volcano (Kamchatka, Russia) has revived interest in the whole family of anhydrous sulfates. Herein is reported the crystal structure of CsCu(SO) which adds important data on the `final' contributor with the largest A cation to the A[Cu(SO)] morphotropic series (A = Na, K, Rb, Cs), the `initial' structurally characterized representative of this family being saranchinaite NaCu(SO). With increasing ionic radius of the alkali metal cation(s), embedded in the [Cu(SO)] framework, symmetry-breaking transformations occur.

Cu, Mg Codoped Bismuth Tantalate Pyrochlores: Crystal Structure, XPS Spectra, Thermal Expansion, and Electrical Properties.

The pyrochlore-type solid-solution formation in a BiMgCuTaO system, synthesized for the first time, is observed at ≤ 0.56. High-temperature X-ray diffraction showed that the pyrochlore phase exists in air up to 1080 °C, where its thermal decomposition leads to the segregation of (Mg,Cu)TaO.