A Scalable Robust Microporous Al-MOF for Post-Combustion Carbon Capture.

Herein, a robust microporous aluminum tetracarboxylate framework, MIL-120(Al)-AP, (MIL, AP: Institute Lavoisier and Ambient Pressure synthesis, respectively) is reported, which exhibits high CO uptake (1.9 mmol g at 0.1 bar, 298 K).

A robust ultra-microporous cationic aluminum-based metal-organic framework with a flexible tetra-carboxylate linker.

Al-based cationic metal-organic frameworks (MOFs) are uncommon. Here, we report a cationic Al-MOF, MIP-213(Al) ([Al(μ-OH)(OH)(mdip)]6Cl·6HO) constructed from flexible tetra-carboxylate ligand (5,5'-Methylenediisophthalic acid; Hmdip). Its crystal structure was determined by the combination of three-dimensional electron diffraction (3DED) and high-resolution powder X-ray diffraction.

Polymer-metal-organic framework self-assembly (PMOFSA) as a robust one-step method to generate well-dispersed hybrid nanoparticles in water.

A new process, PMOFSA, is described here, that opens the way for the one-pot straightforward and versatile manufacture of polymer-MOF nanoparticles in water. It can be expected that this study will not only expand the scope of preparation of polymer-MOF nano-objects but also inspire researchers in the field to prepare a new generation of polymer-MOF hybrid materials.

When Polymorphism in Metal-Organic Frameworks Enables Water Sorption Profile Tunability for Enhancing Heat Allocation and Water Harvesting Performance.

The development of thermally driven water-sorption-based technologies relies on high-performing water vapor adsorbents. Here, polymorphism in Al-metal-organic frameworks is disclosed as a new strategy to tune the hydrophilicity of MOFs. This involves the formation of MOFs built from chains of either trans- or cis- µ-OH-connected corner-sharing AlO(OH) octahedra.

Structural insight into the magnesium borohydride - ethylenediamine solid-state Mg-ion electrolyte system.

A highly complex crystal structure of stoichiometric Mg()(BH) was solved from single crystal synchrotron X-ray diffraction and confirmed by neutron powder diffraction (NPD) on isotopically substituted Mg()(BD). We highlight the role of the amorphous Mg(BH) in the reactivity of the Mg(BH)- system and characterized a previously overlooked phase, Mg()(BH).

Deciphering the Role of Water in Promoting the Optoelectronic Performance of Surface-Engineered Lead Halide Perovskite Nanocrystals.

Lead halide perovskites are promising candidates for high-performance light-emitting diodes (LEDs); however, their applicability is limited by their structural instability toward moisture. Although a deliberate addition of water to the precursor solution has recently been shown to improve the crystallinity and optical properties of perovskites, the corresponding thin films still do not exhibit a near-unity quantum yield. Herein, we report that the direct addition of a minute amount of water to post-treated formamidinium lead bromide (FAPbBr) nanocrystals (NCs) substantially enhances the stability while achieving a 95% photoluminescence quantum yield in a NC thin film.

Real-time regeneration of a working zeolite monitored X-ray diffraction and crystallographic imaging: how coke flees the MFI framework.

We have monitored the regeneration of H-ZSM-5 time-resolved powder X-Ray diffraction (PXRD) coupled with mass spectroscopy (MS). Parametric Rietveld refinements and calculation of the extra-framework electronic density by differential Fourier maps analysis provide details on the mode of coke removal combined with the corresponding sub-unit cell changes of the zeolite structure. It is clear that the coke removal is a complex process that occurs in at least two steps; a thermal decomposition followed by oxidation.

A zirconium metal-organic framework with SOC topological net for catalytic peptide bond hydrolysis.

The discovery of nanozymes for selective fragmentation of proteins would boost the emerging areas of modern proteomics, however, the development of efficient and reusable artificial catalysts for peptide bond hydrolysis is challenging. Here we report the catalytic properties of a zirconium metal-organic framework, MIP-201, in promoting peptide bond hydrolysis in a simple dipeptide, as well as in horse-heart myoglobin (Mb) protein that consists of 153 amino acids. We demonstrate that MIP-201 features excellent catalytic activity and selectivity, good tolerance toward reaction conditions covering a wide range of pH values, and importantly, exceptional recycling ability associated with easy regeneration process.

An Orthorhombic Modification of KCoPO Stabilized under Hydrothermal Conditions: Crystal Chemistry and Magnetic Behavior.

A novel modification of the KCoPO, δ-phase has been prepared by hydrothermal synthesis at 553 K. The compound crystallizes in the orthorhombic system with the unit-cell parameters = 8.5031(8), = 10.

Kinetic Barriers and Microscopic Mechanisms of Noble Gas Adsorption by Nanoporous γ-Mg(BH ) Obtained by Means of Sub-Second X-Ray Diffraction.

Gas adsorption by porous frameworks sometimes results in structure "breathing", "pores opening/closing", "negative gas adsorption", and other phenomena. Time-dependent diffraction can address both kinetics of the guest uptake and structural response of the host framework. Using sub-second in situ powder X-ray diffraction, three intracrystalline diffusion scenarios have been evaluated from the isothermal kinetics of Ar, Kr, and Xe adsorption by nanoporous γ-Mg(BH ) .

Metal-organic magnets with large coercivity and ordering temperatures up to 242°C.

Magnets derived from inorganic materials (e.g., oxides, rare-earth-based, and intermetallic compounds) are key components of modern technological applications.

Discovery of new boron-rich chalcogenides: orthorhombic BX (X=S, Se).

New boron-rich sulfide BS and selenide BSe have been discovered by combination of high pressure - high temperature synthesis and ab initio evolutionary crystal structure prediction, and studied by synchrotron X-ray diffraction and Raman spectroscopy at ambient conditions. As it follows from Rietveld refinement of powder X-ray diffraction data, both chalcogenides have orthorhombic symmetry and belong to Pmna space group. All experimentally observed Raman bands have been attributed to the theoretically calculated phonon modes, and the mode assignment has been performed.

Non-Isothermal Kinetics of Kr Adsorption by Nanoporous γ-Mg(BH) from in Situ Synchrotron Powder Diffraction.

Crystalline materials with pore dimensions comparable to the kinetic diameters of the guest molecules are attractive for their potential use in adsorption and separation applications. The nanoporous γ-Mg(BH) features one-dimensional channels matching this criterion for Kr uptake, which has been probed using synchrotron powder diffraction at various pressures and temperatures. It results in two coexisting crystalline phases with the limiting composition Mg(BH)·0.

Thermal unequilibrium of strained black CsPbI thin films.

The high-temperature, all-inorganic CsPbI perovskite black phase is metastable relative to its yellow, nonperovskite phase at room temperature. Because only the black phase is optically active, this represents an impediment for the use of CsPbI in optoelectronic devices. We report the use of substrate clamping and biaxial strain to render black-phase CsPbI thin films stable at room temperature.

Complexation of Ammonia Boranes with Al.

Ammonia borane, NHBH (AB), is very attractive for hydrogen storage; however, it dehydrogenates exothermally, producing a mixture of polymeric products with limited potential for direct rehydrogenation. Recently, it was shown that AB complexed with Al in Al(BH)·AB endothermically dehydrogenates to a single product identified as Al(BH)·NHBH, with the potential for direct rehydrogenation of AB. Here we explore the reactivity of AB-derived RNHBH (R = -CH, -CH-) with AlX salts (X = BH, Cl), aiming to extend the series to different anions and to enlarge the stability window for Al(BH)·NRBH.

Biporous Metal-Organic Framework with Tunable CO/CH Separation Performance Facilitated by Intrinsic Flexibility.

In this work, we report the synthesis of SION-8, a novel metal-organic framework (MOF) based on Ca(II) and a tetracarboxylate ligand TBAPy endowed with two chemically distinct types of pores characterized by their hydrophobic and hydrophilic properties. By altering the activation conditions, we gained access to two bulk materials: the fully activated SION-8F and the partially activated SION-8P with exclusively the hydrophobic pores activated. SION-8P shows high affinity for both CO ( Q = 28.

Structure and thermoelectric properties of the silver lead bismuth selenides AgPbBiSe and AgPbBiSe.

In the system Ag/Pb/Bi/Se, two new thermoelectric phases derived from lillianite (Pb3Bi2S6) have been characterized. The crystal structures correspond to the 8,8L- and 5,5L-types, respectively, both in the space group Cmcm. The room-temperature unit-cell parameters of 8,8L-Ag5Pb9Bi19Se40 are a = 4.

Deactivation of Zeolite Catalyst H-ZSM-5 during Conversion of Methanol to Gasoline: Operando Time- and Space-Resolved X-ray Diffraction.

The deactivation of zeolite catalyst H-ZSM-5 by coking during the conversion of methanol to hydrocarbons was monitored by high-energy space- and time-resolved operando X-ray diffraction (XRD) . Space resolution was achieved by continuous scanning along the axial length of a capillary fixed bed reactor with a time resolution of 10 s per scan. Using real structural parameters obtained from XRD, we can track the development of coke at different points in the reactor and link this to a kinetic model to correlate catalyst deactivation with structural changes occurring in the material.

Solid Aluminum Borohydrides for Prospective Hydrogen Storage.

Metal borohydrides are intensively researched as high-capacity hydrogen storage materials. Aluminum is a cheap, light, and abundant element and Al can serve as a template for reversible dehydrogenation. However, Al(BH ) , containing 16.

Cooperative Adsorption by Porous Frameworks: Diffraction Experiment and Phenomenological Theory.

Materials science of metal open frameworks is a state-of-the-art field for numerous applications, such as gas storage, sensors, and medicine. Two nanoporous frameworks, γ-Mg(BH ) and MIL-91(Ti), with different levels of structural flexibility, were examined with in situ X-ray diffraction guest adsorption-desorption experiments. Both frameworks exhibit a cooperative guest adsorption correlated with a lattice deformation.

A composite of complex and chemical hydrides yields the first Al-based amidoborane with improved hydrogen storage properties.

The first Al-based amidoborane Na[Al(NH2 BH3 )4 ] was obtained through a mechanochemical treatment of the NaAlH4 -4 AB (AB=NH3 BH3 ) composite releasing 4.5 wt % of pure hydrogen. The same amidoborane was also produced upon heating the composite at 70 °C.

[Possibilities of correction of rheological properties of the blood and free radical processess in patients with acute myocardial infarction combined with type 2 diabetes mellitus].

Aim of the study was assessment of rheological parameters of the blood and processes of free radical oxidation as well as rate of arrhythmia development in patients with acute myocardial infarction (AMI) and type 2 diabetes mellitus (DM) whose otherwise standard therapy was supplemented with 90% omega-3 polyunsaturated fatty acid (PFA). We examined 63 patients with AMI and concomitant diabetes. 90% omega-3 PFA was given to 16 of these patients.

[Optimization of chemotherapy regimens in children with primary pulmonary tuberculosis].

The efficiency of treatment was analyzed in 142 children aged 3-14 years who had local forms of primary pulmonary tuberculosis. Therapy was performed according to regimens 3 and 1, by using individual dosage regimens depending on the extent and severity of a specific process, the presence of complications, and age-related features. In minor tuberculosis, solitary calcifications being detected without signs of the activity of tuberculous infection, the basic course of therapy was 6-8 months; it was performed using 2 drugs in individual cases.