Materials Literature
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Biological systems are often regarded as the ultimate goal of all knowledge in this respect that they can provide the clue for understanding the origin of life and the means for improving the life conditions and healthcare. Hence the interest in high-pressure behavior of organic and biomolecular systems. Such simple o…
Hydrogen atoms or hydrogen bonds play important roles in protein functions. Neutron diffraction is very powerful tool to detect hydrogen atoms. However it is often obtained rather poor resolution data compared with X-ray data due to weak neutron source intensity and large incoherent scattering from hydrogen atoms. The…
Hexagonal ferrites (M, Y, Z-type) represent a new diverse class of magnetoelectric (ME) multiferroics, where ME effect is driven by complex magnetic order. Integration of ME materials with standard semiconductor technology is important for ultimate realization of ME functionalities. They have the potential to display…
Six-types of decagonal quasicrystals (DQCs) and some crystalline approximants have been found in Al-Co-Ni alloys with a wide compositional range from 8 to 25.5 at.% Co and from 20 to 5 at.% Ni with a nearly constant Al content of around 70 at.%, and so the stability of the six DQCs is considered to depend on a ratio o…
The use of predictable coordination geometries and the development of new ligands has allowed supramolecular chemists to design a plethora of new materials. Among these are metal-organic frameworks (MOFs), which are composed of ligands coordinating to metal atoms or clusters to generate a framework with potential poro…
Pincer complexes have been a major focus in organometallic chemistry over the past four decades due to their important potential in catalysis and materials science. In the case of pincer complexes of d8 metals, a growing number of charge-neutral and cationic derivatives featuring hydrides, alkyls, and other reactive m…
Diboronic acid and racemic tetrol are found to form a self-assembled macrocyclic boronic ester in the presence of appropriate guest molecules[1]. In the crystal, stacking of macrocyclic ring is observed to form infinite channel structure accommodating guest molecules by supramolecular interactions. In such structure,…
The pKa values of isolated amino acids in solution are tabulated in standard textbooks. However, the protonation state of a given amino-acid side chain in a protein cannot be estimated from standard pKa values measured from isolated amino acids in solution, because inside a protein it may vary significantly depending…
Thermosalient crystals that exhibit macro-scale motion upon phase transition could be useful as actuators that are capable of converting thermal energy into motion or mechanical work in macroscopic devices.[1] The application capability of these miniature actuators for energy conversion depends on the temperature rang…
Kottogite and symplesite are zinc and ferrous arsenate minerals, respectively. These minerals make the Zn3-x,Fex(AsO4)2·8H2O solid-solution and belongs to the vivianite group of minerals with the chemical formula M3(TO4)2·8H2O. The structure of vivianite and symplesite were determined firstly by Mori and Ito, (1950).…
Using Time-Resolved Small Angle X-ray Scattering (TR-SAXS) on the millisecond time scale to investigate biological systems is an extremely powerful tool to detect possible intermediate states that form during the course of the reaction and gain detailed insight into the sequence of events along the reaction pathway. H…
Nanomaterials in the form of zero-, one- and two-dimensional nanostructures make a high-impact background for both science and technology. At the same time, the synthesis of bulk nanostructured materials remains the least-explored but challenging domain that allows combining the desired physical, chemical and mechanic…
Various imaging techniques with atomic resolutions have been developed to study 3D arrangement of atoms in sub-nanometer and nanometer scale. The method presented is based on the measurement of the anomalous portion of x-ray scattering in large volume of the reciprocal space. It can be shown that, by analogy to x-ray…
The key step in elucidating de novo 3D X-ray structures relies on the incorporation of heavy elements into proteins or crystals. Selenomethionine incorporation or heavy metal derivatization are however not always possible and require additional efforts. Exploiting anomalous signals from intrinsically present elements…
As Goodenough showed 20 years ago, [1] Ba2In2O5 undergoes a transition from brownmillerite to cubic perovskite at higher temperatures, where it becomes a good oxygen ionic conductor. Past studies on doping gallium onto the indium sites [2] showed that higher Ga contents decrease the temperature required for the disord…
It is well-known that the stability, solubility, bioavailability and effectiveness of a pharmaceutical product are affected by the composition (solvates, hydrates, etc.) and the possibility of polymorphism of the Active Pharmaceutical Ingredient (API). In the present study, three different phases of thiocolchicoside,…
Development of 6-axis robotic arm based systems for protein crystallography automation is now expending rapidly. From the seminal work accomplished on beamline FIP-BM30A (ESRF) in 2000' to the present developments, robot based systems significantly changed the crystallography experiment strategy. They open possibiliti…
A bulky substituted binaphthyl diol host has been employed in the separation of picolines. The selectivity profiles for pairs of picolines and for all three picolines, have been determined. The results are correlated with measurements of thermal stability and structure. The solid-vapour kinetics of a xanthenol host wi…
A new protocol using micro-X-ray diffraction is developed to certify the authenticity of drug tablets, and therefore to prevent, deter, or detect counterfeit medicinal products. The method uses X-ray to map hidden patterns printed under the tablet coating and on packages. The patterns such as barcodes and logos are ma…
For decades electron crystallography had not been considered as a reliable method of structure analysis, being more a curious scattering experiment. The introduction of electron diffraction tomography brought to light a novel structure analysis technique able to resolve structures of nanocrystalline samples, not asses…