Articles tagged with Hydrogen Bonding
A team of Swiss researchers used THz spectroscopy to measure the surprisingly slow response of solvating water after changing the charge distribution of a dissolved dye molecule. The study found a timescale around 10 picoseconds, which is slower than expected for liquid water.
Researchers at Kazan Federal University are developing new hydrate inhibitors using water-soluble polyurethanes and biodegradable compounds like polyvinyl alcohol and glucose. The goal is to create affordable and effective solutions to prevent gas hydrates from forming, which can cause serious technological disasters.
Research finds that lone water molecules in oil solvents directly control supramolecular processes. The tiny water concentration affects molecular aggregates and reversible bonds, leading to unexpected outcomes in previous experiments.
Researchers used neutron scattering to study the microscopic structure and optoelectronic properties of hybrid perovskite materials. The study found that hydrogen bonding plays a key role in the material's performance, enabling manufacturers to design solar cells with increased efficiency.
Judy Wu's research proposes connecting aromaticity and hydrogen bonding to control material properties. Her work may lead to the development of new materials with novel properties.
Researchers investigated how additives impact carbon dioxide interaction with beverages, affecting taste and creaminess. They found that additives like sugar reduce diffusion rate, extending fizzy period. Hydrogen bonds also decrease, impacting taste.
Researchers discovered that a specific mix of hydrogen bonds is critical to making strong and ductile infrastructure materials. The optimal overlap of oxygen and hydrogen atoms forms a network of weak hydrogen bonds that connects soft and hard layers.
Scientists develop mathematical model to explain co-nonsolvency phenomenon, which was previously unknown. The model predicts polymer behavior in mixed solvents and reveals mechanism for suppressing co-nonsolvency at high pressures.
Researchers analyzed protein shell and active center interaction in green algae enzymes, improving understanding of biocatalyst efficiency and informing chemical catalyst development. Hydrogen bonds between H-cluster and protein environment significantly influence electrochemical properties and catalytic direction.
The study reveals that anomalous molecular motions in supercooled water lead to the breakdown of Stokes-Einstein behavior, with regions forming hydrogen bonds heterogeneously. The findings provide insights into the physical implications of this anomaly, which could help explain dynamic behaviors in glassy materials.
Researchers developed a theoretical method to calculate biomolecule conformations and demonstrate consistency with experimental results. The model sheds light on the role of amino acid structures in protein functions, revealing potential for extrapolating properties to larger systems.
Researchers developed a novel macrocyclic host molecule with exchangeable caps, enabling control of ion uptake/release on an everyday time scale. The discovery enables practical applications like storage and transport of molecules or uptake/release of target molecules at will.
Researchers at Ruhr-University Bochum have discovered that selenium can form bonds similar to those of hydrogen bonds, resulting in accelerated chemical reactions. The team's findings suggest that weaker bonds, such as hydrogens bonds, might be sufficient for activation or catalysis.
Researchers at the University of Basel successfully studied the strength of hydrogen bonds in a single molecule using an atomic force microscope. They found that hydrogen bonds play a crucial role in the properties of molecules and macromolecules, such as water's high boiling temperature.
Researchers studied halogen-bonding interactions in co-crystals with bromide ions, leading to honeycomb structures and variable geometry. The findings suggest potential gas storage applications and facilitate directional multidentate interactions.
Researchers successfully confine individual H?O molecules within nanosized cavities in beryl crystals, exhibiting ferroelectric properties. This discovery could have implications for various fields, including biology, chemistry, and geology.
Researchers have found that p53 is more prone to aggregation than its cousins due to exposed backbone hydrogen bonds. This instability can lead to the formation of amyloid fibrils, which are associated with various cancers. The study provides new insights into p53 stability and offers potential strategies for developing cancer therapies.
Researchers used a new artificial neural network method to simulate the atomic interactions of water molecules, explaining its melting temperature and density maximum. The study provides insights into the unusual properties of water, which cannot be understood solely on the basis of its chemical composition.
Researchers from Ruhr-Universität Bochum and Technische Universität Dortmund used infrared spectroscopy and computer simulations to analyze the behavior of TMAO at high pressure. They found that some bands shifted to higher frequencies, while individual peaks changed their form, indicating a change in molecular structure.
Researchers created a self-healing electronic material that can restore all its properties needed for use in wearable electronics, including mechanical strength and electrical resistivity. The material is tough and able to self-heal due to boron nitride nanosheets connecting with hydrogen bonding groups.
Researchers discovered that altering one atom in a natural inhibitor, InsP6, increases its ability to neutralize toxins by 26-fold. The study highlights the importance of water and hydrogen bonding in molecular interactions.
Scientists have successfully mapped the potential surface of a small molecule, acetone, using resonant inelastic X-ray scattering. This technique provides direct access to the ground state potential energy surface around selected atomic sites, enabling researchers to study hydrogen bonding and its effects on molecular behavior.
Researchers at Northwestern University have designed a way to prevent protein unfolding under mechanical stress, which causes devastating neurodegenerative diseases. By attaching polymers to proteins, they can stabilize their shape and prevent them from unfolding even when subjected to large forces.
Researchers used molecular dynamics simulations to study supercritical water, revealing differences in hydrogen bond networks between three states: liquid water at room temperature, high-density and low-density supercritical states. The study aims to interpret experimental results using terahertz spectroscopy.
A study examines the effect of DEHHP on PVC flexibility, revealing molecular-level interaction between hydrogen bonds and improving polymer-solvent interactions. The research shows that temperature and concentration affect the strength of these interactions.
Researchers Luigi D'Ascenzo and Pascal Auffinger classify 17 carboxyl(ate) motifs in crystal structures using stereochemical considerations. They provide a systematic naming system and implications for crystal engineering, pharmaceutical research, and biomolecular sciences.
Researchers at the University of Copenhagen have made a groundbreaking discovery by bonding positively charged phosphorus atoms with positively charged hydrogen ones. This finding may revolutionize our understanding of how biologically important molecules like DNA and proteins form properly.
Chemists have made a breakthrough in visualizing hydrogen bond interactions, which play a key role in biological molecules and pharmaceuticals. Using two-dimensional infrared spectroscopy techniques, researchers directly observed the coordinated vibrations between hydrogen-bonded molecules.
Researchers have successfully captured a view of a molecular catalyst that converts hydrogen into electricity, confirming previous hypotheses and providing insight into its structure. The study's findings offer potential improvements to hydrogen-powered fuel cells, which could be more expensive but also carbon-neutral.
A combined computational and experimental study reveals arrays of gear-like molecular-scale machines that rotate in unison when pressure is applied to self-assembled silver-based superlattices. The superlattice structures form layers with hydrogen bonds acting as 'hinges' to facilitate rotation.
Researchers use revolutionary techniques to observe hydrogen atoms in ice at unprecedented pressures, revealing two different mechanisms of dissociation. The findings could alter our understanding of energy science and have implications for studying planetary interiors.
Researchers developed a quantum Drude oscillator (QDO) that mimics the behavior of real water molecules, producing a realistic liquid with well-developed hydrogen bonds and other properties. The 'bottom up' approach has clear biological applications and potential for simulating other substances.
Researchers at Johannes Gutenberg University Mainz confirmed the original tetrahedral model of water's molecular structure, attributing its unique features to hydrogen bonds between molecules. The findings resolve a controversy that emerged in 2004, which was later attributed to temporary fluctuations in the bond network.
A team of chemists at the University of Geneva has developed a rare halogen bond that can transport anions across phospholipid bilayer membranes, similar to cellular structures. This discovery has significant implications for medical applications, particularly in treating diseases linked to ion transport issues.
Scientists have developed new techniques to contain hydrogen at pressures above 3 million times normal atmospheric pressure, exploring its behavior under extreme conditions. The study confirms the stability of the chemical bond between atoms, disproving previous interpretations of a metallic state.
Researchers found protons can move efficiently in stacked systems of molecules, common in plant biomass, membranes, DNA, and elsewhere. This discovery could lead to better catalysts, fuels, and drugs.
Researchers found that protons can transfer without hydrogen bonds, involving significant rearrangements of molecular fragments. Methyl groups on uracil dimers played a crucial role in enabling this process.
Researchers at Caltech used a novel method to calculate the dynamics of water molecules and found that entropy plays a crucial role in explaining why water spontaneously flows into carbon nanotubes. The team discovered three different reasons why water would flow freely into tubes, depending on diameter.
Researchers at New York University's Department of Chemistry have created a molecular polyhedron, a 13 Archimedean solid that can serve as a cage-like framework to trap other molecular species. The structure was formed by designing the assembly of two kinds of hexagonal molecular tiles using 72 hydrogen bonds.
Researchers found that only one-quarter of water molecules at the surface exhibit characteristics of both gas and liquid phases, allowing for new understanding of chemical reactions and atmospheric balance. The study provides a framework for investigating other interfaces, such as those in living cells.
Scientists at TUM have developed a novel method to observe hydrogen bond formation in protein binding processes. Their model system showed that protein recognition takes place via hydrophobic interaction of the S-protein with two spatially clearly defined areas of the unstructured S-peptide.
Researchers discover that weak hydrogen bonds produce stronger materials when confined to specific spaces, leading to enhanced ductility and self-healing capabilities. This unique arrangement of atomic bonds enables silk to surpass steel in strength tests, with potential applications for future materials.
Researchers used computer models to simulate silk's molecular and atomic mechanisms, revealing the arrangement of atomic bonds responsible for its strength. The study found that a critical size of beta-sheet crystals is necessary for silk to exhibit ultra-strong and ductile characteristics.
Researchers at Los Alamos National Laboratory have discovered a potential weakness in the cell walls of certain plant materials, making them vulnerable to enzymatic attack. This insight could lead to an economical and viable process for producing biofuels from biomass.
A new technique using scanning tunneling and atomic force microscopes can identify complementary DNA base pairs by measuring the strength of hydrogen bonds. This method could lead to a new DNA sequencing technology that is faster and cheaper than current methods.
Researchers have identified a unique molecule essential to breaking down pollutants in the atmosphere, including acid rain. This breakthrough discovery will help scientists model pollutant reactions and predict potential outcomes.
Researchers have discovered a potential solution to store raw hydrogen in a compact and efficient manner. MOF-74, a porous crystalline powder, can adsorb more hydrogen than any unpressurized framework structure studied to date at low temperatures.
Researchers have synthesized a donut-shaped molecule that selectively binds to chloride ions, using bridging hydrogen bonds. This breakthrough has the potential to create a new family of anion chelators with high specificity.
The strength of spider silk lies in the specific geometric configuration of structural proteins, which have small clusters of weak hydrogen bonds that work cooperatively to resist force and dissipate energy. This structure makes spider silk as strong as steel, despite weaker hydrogen bonds.
A team of researchers has explained the discrepancy between computer simulations and experimental observations of protein behavior under mechanical stress. At slower speeds, hydrogen bonds in proteins behave differently, breaking three at a time when pressure is applied slowly.
Researchers have created tiny test tubes made of single-walled carbon nanotubes, which enables them to probe the role of extreme molecular confinement on chemical behavior. The nanotubes allow water molecules to bond together into rings and shield reactive molecules from reacting with other chemicals.
Bioengineers Teresa Head-Gordon and Margaret Johnson analyzed x-ray data to determine the static structural organization of liquid water. Their study found that, on average, liquid water molecules form a tetrahedral network, contradicting previous claims of a 'rings and chains' model.
Researchers at Duke University have shown that hydrogen bonds are crucial for protein folding and are highly conserved across different proteins. Their study found that deleting hydrogen bonds from proteins led to destabilization of the structure, supporting the importance of these bonds in protein folding.
Researchers studied iron-sulfur proteins called rubredoxin, which play a crucial role in processes like photosynthesis and respiration. By analyzing the strength of hydrogen bonds in different variants of the protein, they were able to explain changes in protein function and predict its behavior.
Researchers at Berkeley Lab found that most liquid water molecules interact with only two other water molecules, contrary to the traditional picture of four hydrogen bonds per molecule. The study used a unique experimental technique and measured the energy required to distort hydrogen bonds in solid and liquid water.
A team of scientists has found that water molecules in liquid form clump much more loosely than previously believed, challenging 20 years of research. This discovery reopens the hunt for a better understanding of water's unique properties and potential applications in fields like biology.
A team led by scientists at Stanford Synchrotron Radiation Laboratory found that water molecules form only two hydrogen bonds instead of the previously believed three or four. This discovery reopens the hunt for the structure of liquid water and could lead to a better understanding of the chemistry of cells.
Virginia Tech researchers have made a breakthrough in creating polymers that can be reversed using heat, opening up new possibilities for thermoplastic elastomers (TPE) and novel adhesives. The team synthesized nano-phase separated polystyrene and polyisoprene based materials containing reversible linkages.
Researchers have developed a new technique called Doubly Vibrationally Enhanced (DOVE) Four Wave Mixing, which uses two infrared lasers to study molecular connections and vibrations. This method allows chemists to gain insights into complex scientific problems, such as bacterial resistance to antibiotics and soil weathering.
A pair of hydrogen bonds in titin allows muscle to stretch and return to normal by regulating unfolding of protein sections. This finding is a significant step forward in understanding muscle elasticity and its role in cardiac muscular diseases.