A5058149110- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Spectroscopy and Quantum Chemical Studies
- Surface Chemistry and Catalysis
- Lipid Membrane Structure and Behavior
- Analytical Chemistry and Chromatography
- nanoparticles nucleation surface interactions
- Molecular spectroscopy and chirality
- Surfactants and Colloidal Systems
- X-ray Diffraction in Crystallography
- Calcium Carbonate Crystallization and Inhibition
- Enzyme Structure and Function
- Supramolecular Self-Assembly in Materials
- Inorganic and Organometallic Chemistry
- Origins and Evolution of Life
- Chemical Thermodynamics and Molecular Structure
- Advanced Chemical Physics Studies
- Crystal structures of chemical compounds
- Protein Structure and Dynamics
- Porphyrin and Phthalocyanine Chemistry
- Chemical Synthesis and Analysis
- Molecular Junctions and Nanostructures
- Sphingolipid Metabolism and Signaling
- Photochromic and Fluorescence Chemistry
- Various Chemistry Research Topics
Weizmann Institute of Science
2016-2025
Interface (United States)
2011-2019
University of Leeds
2011
International Institute of Molecular and Cell Biology
2011
University of Copenhagen
2008
University of Cape Town
2008
École Normale Supérieure Paris-Saclay
2008
Université Paris Cité
2008
Institut Polytechnique de Bordeaux
2008
Centre National de la Recherche Scientifique
2008
Since, on applying the limits first term in righthand side of (C-5) vanishes, we have k2pl l;
Nucleation, growth, and dissolution of crystals have been studied by stereochemical approach involving molecular recognition at interfaces. A methodology is described for using ''tailor-made'' additives designed to interact stereospecifically with crystal surfaces during growth dissolution. This procedure was instrumental in controlling morphology revising the concept structure symmetry solid solutions. Consequently, it applied transformation centrosymmetric single into solutions polar...
Textures of calcite crystals from a variety mineralized tissues belonging to organisms four phyla were examined with high-resolution synchrotron x-ray radiation. Significant differences in coherence length and angular spread observed between taxonomic groups. Crystals polycrystalline skeletal ensembles more perfect than those that function as single-crystal elements. Different anisotropic effects on crystal texture for sea urchin mollusk crystals, whereas none was found the foraminifer,...
In this review, the delicate interplay between stereochemical control, monitoring at subnanometer level, and an understanding of crystal nucleation is probed. Control may be achieved employing tailor-made auxiliaries, which are either inhibitors or promoters. The process monitored interface via grazing incidence X-ray diffraction (GIXD). By these means, we can glean experimental knowledge in various molecular systems. A hypothesis was invoked that supersaturated solutions containing clusters...
Tailor-made auxiliaries for the control of nucleation and growth molecular crystals may be classified into two broad categories: inhibitors promoters.Tailor-made crystal can used a variety purposes, which include morphological engineering etching, reduction symmetry, assignment absolute structure chiral molecules polar crystals, elucidation effect solvent on growth, crystallization desired polymorph.As promoters, monolayers amphiphilic water have been to induce three-dimensional at...
Sea urchin skeletal elements are composed of single crystals calcite. Unlike their synthetic counterparts, these do not have well-developed cleavage and consequently much more resistant to fracture. This phenomenon is due in part the presence acidic glycoproteins occluded within crystals. By means x-ray diffraction with synchrotron radiation, it shown that protein calcite only slightly decreases coherence length but significantly increases angular spread perfect domains In biogenic calcite,...
Abstract When crystals of organic compounds are grown in the presence growth inhibitors, there is a change crystal morphology. A stereochemical correlation exists between structure, its modified morphology, and molecular structure inhibitor. This has been successfully exploited for efficient resolution conglomerates, engineering with desired morphologies, direct relative assignment absolute configurations chiral molecules crystals, design new model spontaneous generation optical activity. In...
Crystallization of the thermodynamically metastable β glycine is explained on basis its growth at opposite poles crystal (see graph) and by considering structure relevant surfaces three polymorphs their interactions with solvent molecules.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal morphology engineering by "tailor-made" inhibitors; a new probe to fine intermolecular interactionsZiva Berkovitch-Yellin, J. Van Mil, L. Addadi, M. Idelson, Lahav, and LeiserowitzCite this: Am. Chem. Soc. 1985, 107, 11, 3111–3122Publication Date (Print):May 1, 1985Publication History Published online1 May 2002Published inissue 1 1985https://pubs.acs.org/doi/10.1021/ja00297a017https://doi.org/10.1021/ja00297a017research-articleACS...
Monolayers of aliphatic long-chain alcohols induced nucleation ice at temperatures approaching 0 degrees C, in contrast with water-soluble alcohols, which are effective antifreeze agents. The corresponding fatty acids, or bulky hydrophobic groups, induce freezing as much 12 C lower. point by the amphiphilic was sensitive not only to surface area per molecule but, for series (C(n)H(2n + 1)OH), chain length and parity. chains n odd reached an asymptotic temperature upper value = 31; even a...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInduced freezing of supercooled water into ice by self-assembled crystalline monolayers amphiphilic alcohols at the air-water interfaceR. Popovitz-Biro, J. L. Wang, Majewski, E. Shavit, Leiserowitz, and M. LahavCite this: Am. Chem. Soc. 1994, 116, 4, 1179–1191Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February...
Differences in the two-dimensional packing arrangements of racemic and enantiomeric crystalline self-assemblies on water surface amphiphilic activated analogs lysine glutamic acid have been used to prepare oligopeptides homochiral sequence single handedness from chiral nonracemic mixtures. The structures were determined by grazing incidence x-ray diffraction diastereomeric composition matrix-assisted laser desorption time-of-flight mass spectrometry with enantio-labeling. These results...
Abstract The advent of well‐collimated, high‐intensity synchrotron X‐ray sources and the consequent development surface‐specific diffraction fluorescence techniques have recently revolutionized study Langmuir monolayers at air–liquid interface. These methods allowed for first time determination in‐plane vertical structure such with a resolution approaching atomic level. We briefly describe these methods, including grazing incidence diffraction, specular reflectivity, Bragg rods, standing...
Inhibition of hemozoin biocrystallization is considered the main mechanism action 4-aminoquinoline antimalarials including chloroquine (CQ) but cannot fully explain activity ferroquine (FQ) which has been related to redox properties and intramolecular hydrogen bonding. Analogues FQ, methylferroquine (Me-FQ), ruthenoquine (RQ), methylruthenoquine (Me-RQ), were prepared. Combination physicochemical molecular modeling methods showed that FQ RQ favor bonding between NH group terminal amino in...
Molecular crystals: The structures and relative energies of glycine polymorphs are determined using dispersion corrections to PBE PBEh density functionals. picture shows a potential-energy surface for the a-b plane γ-glycine obtained with functional theory including many-body interactions.
Heme detoxification is a critical step in the life cycle of malaria-causing parasites, achieved by crystallization into physiologically insoluble hemozoin. The mode nucleation has profound implications for understanding mechanism action antimalarial drugs that inhibit hemozoin growth. Several lines evidence point to involvement acylglycerol lipids process. Hemozoin crystals have been reported form within lipid nanospheres; alternatively, it found vitro they are nucleated at an lipid–water...
The ideal hydrogen-bonded contact of amide groups is postulated as a function the geometry CONH2 bonds and lone pairs oxygen atoms. observed packing arrangements primary amides are analysed in terms this three elements symmetry (glide plane; two-fold screw axis; translation) generating networks from centrosymmetric pairs. inter-relationship between molecular shape conformation modes considered. NH ⋯ O lonepair contacts distances types also discussed.