Using a novel layer-by-layer approach we have deposited metal−organic open frameworks (MOFs) based on benzenetricarboxylic acid ligands and Cu(II)-ions COOH-terminated organic surface. The layers were characterized using number of surface analysis techniques. XRD measurements show that the MOFs this method same bulk structure HKUST-1.

We report the synthesis of layered [Zn(2)(bdc)(2)(H(2)O)(2)] and [Cu(2)(bdc)(2)(H(2)O)(2)] (bdc = benzdicarboxylate) metal-organic frameworks (MOF) carried out using liquid-phase epitaxy approach employing self-assembled monolayer (SAM) modified Au-substrates. obtain Cu Zn MOF-2 structures, which have not yet been obtained conventional, solvothermal methods. The 2D Cu(2+) dimer paddle wheel planes characteristic for MOF are found to be strictly planar, with oriented perpendicular substrate....

Abstract Flexible metal-organic frameworks (MOFs) are structurally flexible, porous, crystalline solids that show a structural transition in response to stimulus. If MOF-based solid-state and microelectronic devices be capable of leveraging such flexibility, then the integration MOF thin films into device configuration is crucial. Here we report targeted precise anchoring Cu-based alkylether-functionalised layered-pillared crystallites onto substrates via stepwise liquid-phase epitaxy. The...

Organosilane self‐assembled monolayers (SAMs) are commonly used for modifying a wide range of substrates. Depending on the end group, highly hydrophobic or hydrophilic surfaces can be achieved. Silanization bases adsorption, self‐assembly and covalent binding silane molecules onto results in densely packed, SAM. Following wet chemical routines, quality monolayer is often variable and, therefore, unsatisfactory. The process not only affected by chemicals involved their purity but also...

The pillared-layered metal–organic framework compounds M2(BME-bdc)2(dabco) (M2+ = Zn2+, Co2+, Ni2+, Cu2+; BME-bdc2– 2,5-bis(2-methoxyethoxy)-1,4-benzenedicarboxylate; dabco diazabicyclo[2.2.2]octane) exhibit structural flexibility and undergo guest temperature-induced reversible phase transitions between a narrow pore (np) large (lp) form. These were analyzed in detail by powder X-ray diffraction ex situ, isothermal gas adsorption measurements differential scanning calorimetry. threshold...

Responsive metal-organic frameworks (MOFs) that display sigmoidal gas sorption isotherms triggered by discrete pressure-induced structural transformations are highly promising materials for energy related applications. However, their lack of transportability via continuous flow hinders application in systems and designs rely on liquid agents. We herein present examples responsive which exhibit a breathing behaviour show step-shaped isotherms, akin to the distinct oxygen saturation curve...

The islet amyloid polypeptide (IAPP) or amylin is a pancreatic hormone and crucially involved in the pathogenesis of type-II diabetes mellitus (T2DM). Aggregation formation IAPP considered as primary culprit for β-cell loss T2DM patients. In this study, first X-ray reflectivity (XRR) measurements on at lipid interfaces have been carried out, providing molecular level characterization steps lipid-induced fibrillation process IAPP, which initiated by nucleation, oligomerization, followed...

Herein, we explore the effect of different types osmolytes on high-pressure stability and tertiary structure a well-characterized monomeric protein, staphylococcal nuclease (SNase). Changes in denaturation pressure radius gyration are obtained presence concentrations trimethylamine N-oxide (TMAO), glycerol urea. To reveal structural changes protein upon compression at various osmolyte conditions, small-angle X-ray scattering (SAXS) experiments were carried out. this end, new cell suitable...

Marine organisms have evolved a surprising mechanism to counteract the deleterious effects of urea by trimethylammonium N-oxide (TMAO). The effect pressure on structure and intermolecular interactions lysozyme in TMAO solutions was studied (see picture). These findings help understand compensatory urea–TMAO mixtures deep-sea organisms. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They...

Garnet solid-electrolyte-based Li-metal batteries can be used in energy storage devices with high densities and thermal stability. However, the tendency of garnets to form lithium hydroxide carbonate on surface an ambient atmosphere poses significant processing challenges. In this work, decomposition layers under various gas environments is studied by using two surface-sensitive techniques, near-ambient-pressure X-ray photoelectron spectroscopy grazing incidence diffraction. It found that...

The influence of pressure on the structure and protein-protein interaction potential dense protein solutions was studied analyzed using small-angle x-ray scattering in combination with a liquid state theoretical approach. structural as well parameters lysozyme are affected by nonlinear way. properties water lead to modification interactions below 4 kbar, which might have significant consequences for stability proteins extreme natural environments.

We present results from small-angle x-ray scattering data on the effect of high pressure phase behavior dense lysozyme solutions in liquid-liquid separation region, and characterize underlying intermolecular protein-protein interactions as a function temperature this region space. A reentrant has been discovered at elevated pressures, which originates dependence solvent-mediated interactions.

We determined the intermolecular interaction potential, V(r), of dense lysozyme solutions, which governs spatial distribution protein molecules and location its liquid–liquid phase separation (LLPS) region, in various crowding environments applying small-angle X-ray scattering combination with liquid-state theory. explored effect polyethylene glycol (PEG) on V(r) protein's behavior over a wide range temperatures pressures, crossing from dilute to semidilute polymer regime, thereby mimicking...

The multi-purpose experimental endstation of beamline BL9 at the Dortmund Electron Accelerator (DELTA) is dedicated to diffraction experiments in grazing-incidence geometry, reflectivity and powder measurements. Moreover, fluorescence analysis inelastic X-ray scattering can be performed. Recently, a new set-up for small-angle wide-angle utilizing detection by means an image-plate scanner was installed described detail here. First on aqueous solutions lysozyme with different cosolvents...

The structure of the carbon dioxide-water interface was analyzed by X-ray diffraction and reflectivity at temperature pressure conditions which allow formation gas hydrate. water-gaseous CO2 water-liquid were examined. two interfaces show a very different behavior with respect to While liquid-gas exhibits thin liquid layers on water surface, small clusters hydrate observed liquid-liquid interface. data obtained from both points process may be explained so-called local structuring hypothesis.

The flexible alkyl ether functionalized metal–organic framework [Zn2(BME-bdc)2(dabco)]n (BME-bdc = 2,5-bis(2-methoxyethoxy)-1,4-benzenedicarboxylate, dabco 1,4-diazabicyclo[2.2.2]octane) shows remarkable structural changes upon selective adsorption of CO2 as determined by in situ X-ray diffraction at 195 K. Upon accommodation carbon dioxide transfers from a narrow pore form to an open form, which exhibits much higher unit cell volume. Due the slow kinetics unexpected metastable intermediate...

The adsorption process of proteins to surfaces is governed by the mutual interactions among proteins, solution, and substrate. Interactions arising from substrate are usually attributed uppermost atomic layer. This actual surface defines chemistry hence steric electrostatic interactions. For a comprehensive understanding, however, bulk material also have be considered. Our protein experiments with globular (α-amylase, bovine serum albumin, lysozyme) clearly reveal influence subsurface via...

The experimental endstation of the hard X-ray beamline BL9 Dortmund Electron Accelerator is equipped with a Huber six-circle diffractometer. It dedicated to grazing-incidence diffraction and reflectivity experiments on solid surfaces thin films as well powder measurements. A new set-up for scattering liquids has been built up using silicon mirror reflect incident liquid surface at angles incidence around critical angle total reflection sample. measurements polymer film an epitaxically grown...

The influence of natural cosolvent mixtures on the pressure-dependent structure and protein-protein interaction potential dense protein solutions is studied analyzed using small-angle X-ray scattering in combination with a liquid-state theoretical approach. deep-sea osmolyte trimethylamine-N-oxide shown to play crucial singular role its ability not only guarantee sustainability native protein's folded state under harsh environmental conditions, but it also controls water-mediated...

An approach to the chemical characterization and a study of morphology very fine fractions nanoparticles on surfaces can be deduced from experiments using grazing incidence X-ray Standing Waves (XSW) by means Total Reflection Fluorescence (TXRF). Some theoretical aspects not considered until now for TXRF XSW, e.g. influence coherence length X-rays different sources, particle form, size distribution, are presented discussed. Results numerical simulations XSW-scans considering modelling...