Articles tagged with Chirality
Researchers develop methods to introduce chirality into materials, enabling tunable properties in thin films. The discovery has potential applications in pharmaceuticals, biomedicine, communication and energy.
Researchers at University of Illinois developed new semiconductor materials that can harness the power of chirality, a non-superimposable mirror image. The study found that subtle molecular changes can modulate chiral helical assemblies, leading to new optical, electronic, and mechanical properties.
A new study using twisted magnets as computational medium has made brain-inspired computing more adaptable, reducing energy use and potential carbon emissions. The research found that by applying magnetic fields and changing temperature, physical properties of the materials can be adapted to suit different machine-learning tasks.
Researchers at Rice University have discovered a way to transform a rare-earth crystal into a magnet by using chirality in phonons. Chirality, or the twisting of atoms' motion, breaks time-reversal symmetry and aligns electron spins, creating a magnetic effect.
Researchers successfully developed a novel method for transforming atropisomers into specific enantiomers using the Pauson–Khand reaction. The reaction achieved high enantiomeric excesses and selectivity, opening up new avenues for synthesizing pharmaceutical compounds.
Researchers have engineered a range of new single-walled transition metal dichalcogenide (TMD) nanotubes with different compositions, chirality, and diameters. The ability to synthesize diverse structures offers insights into their growth mechanism and novel optical properties.
The study successfully observed the chiro-optical effect at the nanoscale, demonstrating the ability to analyze the chiral structure of matter using light. Different images were obtained when illuminating with right- or left-circularly polarized light, clarifying that local handedness can be distinguished.
A new approach to quantum light emitters generates circularly polarized single photons, a crucial step towards quantum cryptography and information processing. The innovation uses a proximity-effect approach to produce low-cost fabrication and reliability.
Researchers have made a significant advancement in the synthesis of β-lactam scaffolds, structural components frequently found in essential antibiotics. The breakthrough uses nickel catalysts to overcome challenges in β-lactam synthesis, enabling more efficient and simplified production of high-value materials.
Researchers have developed a new way to identify chiral molecules using light, which vastly improves detection efficiency. The new method uses lasers to drive chiral electronic currents in molecules, causing one version to emit bright light while its counterpart remains dark.
A new study by Prof. Yossi Paltiel and colleagues reveals that nuclear spin significantly affects oxygen dynamics in chiral environments, particularly in transport. This finding challenges long-held assumptions and opens up possibilities for advancements in biotechnology and quantum biology.
Researchers at CABBI develop photoenzymatic system to efficiently synthesize chiral amines, crucial chemical building blocks with wide applications. The team's new method addresses a longstanding challenge in synthetic chemistry and offers a promising platform for biomanufacturing.
A team led by Takuro Sato found that the chiral-induced spin selectivity (CISS) effect can filter out electrons and molecules with specific chirality, enabling enantioselectivity without chiral catalysis. This discovery has broader applications in producing safer chemicals and developing advanced electronics across various scales.
Researchers at Texas Tech University and Nanjing University have developed a new method for controlling chirality in asymmetric catalysis using chiral aggregates. This method, called aggregation-induced catalysis (AIC), uses the aggregation of chiral auxiliary raw materials or catalysts to achieve controlled chirality in reactions. The...
Researchers at Nagoya University developed a method to process cholesteric liquid crystals into micrometer-sized spherical particles, creating a unique anti-counterfeiting QR code that can only be displayed under a specific circular polarizer. The use of chirality in these particles enables the creation of more secure codes with potent...
Researchers successfully synthesized isotopic atropisomers based on carbon isotope discrimination, exhibiting high rotational stability and stereochemical purity. The findings hold promise for fundamental understanding of isotopic atropisomers with implications in organic and medicinal chemistry.
A team of chemists at UC Riverside has discovered that the distribution of a magnetic field is itself chiral, allowing for the rapid formation of chiral structures. This method has potential applications in sensing and anti-counterfeit technology, such as detecting chiral or achiral molecules linked to certain diseases.
Researchers employ DFT and NEST analysis to investigate pyrrolidinyl gold(I) complexes, revealing enhanced understanding of electronic and steric effects. The findings facilitate the design of novel chiral ligands for enantioselective reactions.
Researchers have discovered a new phase of matter called the chiral bose-liquid state, which has surprising characteristics, such as robust spin and long-range entanglement. This discovery opens up new possibilities for understanding the physical world and potentially leading to breakthroughs in quantum computing.
Physicists have discovered that phonons, quasiparticles describing crystal lattice vibrations, can exhibit chirality - a fundamental concept with implications for material properties. Using circular X-ray light, researchers observed corkscrew motions of phonons in quartz, revealing the phenomenon of chiral phonons.
A team of Japanese researchers has successfully developed a recycling photoreactor that enables the synthesis of optically pure compounds with high yields, achieving an optical purity of 98-99%. The system uses a two-step rapid photoracemization process and can produce enantiomerically pure chiral sulfoxides in yields higher than 80%.
Researchers have developed a modular system to recognize chiral molecules, which could lead to more effective methods of separating enantiomers in drugs. The system uses metallopolymers with chirality to sense two enantiomeric molecules through electrochemical interactions.
A team led by Taylor Hughes and Gaurav Bahl has experimentally realized a theoretical extension of chirality in two dimensions. They constructed a topological circuit network to explore new behaviors predicted by this extended chirality, which manifests as locking between a particle's flow direction and an arrow carried along with it.
A team of chemists at the University of Basel has successfully synthesized organic light-emitting diodes by creating compounds with the exact three-dimensional structure desired. This breakthrough enables the development of more efficient and longer-lasting OLEDs.
Scientists at CiQUS have developed a methodology to quantify the folding degree of helical polymers, identifying the direction of helix rotation and its impact on structure-function relationship. The innovative approach allows for the estimation of folding degree and potential improvements in polymer performance.
Researchers at Colorado State University have created a synthetic molecule with an asymmetric oxygen atom that remains stable and nonreactive. This feat is significant because chiral molecules can have drastically different properties and are crucial in fields like drug discovery and materials engineering.
Researchers at Tokyo University of Science used computer simulations to clarify why L-alanine was preferred over D-alanine during primordial RNA aminoacylation reactions. The study revealed that L-amino acid had more electrostatic stability in its transition state, providing a plausible reason for the selective aminoacylation.
Researchers at the University of Birmingham have devised a way to fabricate a complex structure, previously found only in nature, to control light in the visible range. This new approach uses self-assembled colloidal particles to create chiral photonic crystals with tailored optical properties.
Researchers have developed a novel fluorescence recognition method for detecting D-glucose in water, showing excellent D-glucose chiral selectivity. The system consists of cyclodextrin and monoboronic acid-based receptor complexes, which can detect glucose concentrations with low limits of detection.
Chiral phonons convert waste heat into spin information, promising energy-efficient devices for computing and data storage. Researchers created a spin current at room temperature without magnetic materials, opening the door to cheaper, more accessible spintronic devices.
Researchers developed a new encryption method that encodes secret messages using brilliant colors created by silver nanostructures reacting to polarized light. The method's unique chiral response makes it more secure than traditional binary codes.
Researchers have developed a novel catalytic approach to synthesize monocyclic 3-(pyrrol-1-yl)-azetidin-2-ones, which show potential as therapeutic agents. The method yields all four diastereomers with high selectivity and has been published in Current Organocatalysis.
Researchers at Boston College have developed a new catalytic approach that enables concurrent control of multiple convergences and selectivities in intermolecular amination of allylic carbon-hydrogen bonds in alkenes. The cobalt-based system exploits unique features of homolytic radical reaction to form desired amine products in a high...
Researchers employed magnets to separate left and right handed chiral molecules, verifying a novel mechanism that could enhance efficiency and widen magnet-based chirality control. The study discovered spin polarizations corresponding to different handedness in organic chiral superconductors.
Scientists at Seoul National University and Korea University created a new method to detect molecular chirality, a property crucial in biology, chemistry, and pharmaceutics. They achieved ultrasensitive detection of up to 10^-4 M using chiral plasmonic nanoparticles with four-fold rotational symmetry.
Researchers at USTC developed a new strategy for synthesizing axially chiral allenic compounds, achieving high enantiopurity and stereoselectivity. The method involves nickel-catalyzed asymmetric propargyl substitution and Myers rearrangement reactions.
Researchers at Aalto University have developed a new optical computing approach that uses circularly polarized light to operate logic gates, resulting in ultrafast processing speeds. The technology operates about one million times faster than existing technologies and can be integrated into a single device.
Researchers found that tumor cells directly interact with blood vessel cells, altering their normal clockwise orientation to a counterclockwise position. This interaction may play a role in cancer metastasis and could be targeted for prevention and treatment.
Researchers at the University of Ottawa have developed a new technique to differentiate the mirror images of a chiral molecule, a problem that was believed to be unsolvable for nearly 20 years. The team used linear polarized helical light beams to enhance sensitivity and observed differential absorption in achiral molecules.
Physicist Alex Travesset's calculations show how controlled evaporation can assemble into a pinwheel-shaped, two-layered structure with chiral properties. The nanostructure has unusual optical, mechanical and electronic characteristics, making it a significant breakthrough for specially engineered materials.
Scientists at the University of Illinois have created a new strategy to build materials with unique properties by organizing nanoparticles into pinwheel shapes. The pinwheel lattice exhibits chirality, a property that can be seen in nature's examples such as DNA and human hands.
Researchers discovered how enzymes metabolize chiral PCBs, leading to neurodevelopmental issues. The study found that mirror-image isomers are metabolized differently, causing selective toxicity in humans and animals.
Researchers have successfully segregated oppositely helical supramolecular polymers in a solution using audible sound, inducing surface vibrations and advection currents. This approach allows for the spatiotemporal control of chiral supramolecular systems, enabling the segregation of multiple aggregates.
Researchers at Tokyo Institute of Technology have identified truly chiral phonons in cinnabar, a three-dimensional material. The discovery was made using a combination of theoretical calculations and experimental techniques, allowing for the determination of chirality with improved resolution.
Materials theorists Boris Yakobson and Ksenia Bets propose a method to control the growth of carbon nanotubes by constraining the carbon feedstock in a furnace. This approach allows for the production of batches with single desired chirality, which is essential for highly conductive applications. The researchers suggest etching away lo...
Researchers discovered a novel metallic crystal, Kagome metal, with unusual electronic behavior on its surface. The material's unique atomic structure allows for the manipulation of electrons' spin chirality, which can be controlled by applying a local voltage.
A team of researchers from Johannes Gutenberg University Mainz have successfully developed a new approach to improve the way data is processed and stored. By combining chirality in spin configurations and molecules, they aim to create faster, smaller, and more efficient data storage devices.
A Japanese research team has synthesized isotopic atropisomers, a rare class of compounds, using ortho-CH3/CD3 discrimination. The resulting isotopic atropisomers exhibit high rotational stability and stereochemical purity.
Scientists used new instrumentation to study the chiral magnetic ordering of Cu2OSeO3, revealing helical and conical magnetic modulations. This discovery enables novel investigations of polar magnetic textures with high spatial resolution and short time scales.
Researchers have reported the first observation of switchable chiral transport in a structurally achiral crystal, Kagome superconductor CsV3Sb5. The team proposes a model where electrons arrange themselves in patterns that violate mirror symmetry, even though atoms are arranged symmetrically.
Researchers from Tokyo Metropolitan University used a surfactant to disperse boron nitride nanotubes and coat them onto surfaces without bundling. Heat treatment removed the surfactant, revealing clean nanoscale templates that can be used to grow coaxial nanotubes with exotic electronic properties.
Scientists have observed chiral transport in a structurally achiral crystal, the Kagome superconductor CsV3Sb5. This phenomenon can be switched using magnetic fields, exhibiting novel electronic behavior.
A search of the Cambridge Structural Database found nearly 1,800 conglomerate crystal structures with spontaneous enriched chirality, augmenting synthetic building blocks for medicinal chemists. This discovery introduces a new pool of chiral molecules outside of natural sources, potentially leading to more effective treatments.
A team of researchers from Münster and Pittsburgh has discovered that chiral oxide catalysts can align electron spin, improving the efficiency of chemical reactions. The findings have potential applications in spin-based electronics and fuel cells.
Researchers at POSTECH developed a chiral structure to block all vibration modes in a specific frequency band, effectively reducing any vibration. This innovation has significant implications for various fields like mechanical structures, buildings, and civil engineering.
Scientists demonstrate efficient and controllable emission of circularly polarized light from resonant metasurfaces. The high-purity light source has a directional output and is independent of excitation power.
Researchers at ICFO successfully simulated a topological gauge theory using ultracold potassium atoms dressed with laser light, moving beyond previous electromagnetism simulations. This breakthrough allows for better understanding of exotic quantum behavior in materials and error correction codes for future quantum computers.
Researchers at Rice University have created 2D chiral superstructures using three-sided pyramids, which could lead to breakthroughs in metamaterials. The structures, composed of ultrathin assemblies of particles, incorporate left-handed and right-handed domains and exhibit unique optical properties.
A new broadband near-field chiral source enables comparison of different edge states to advance applications in integrated photonics and wireless devices. The research advances the field of chiral photonics science, promoting applications of chiral-sorting technology for microwave metadevices.
A novel technique can rapidly detect chiral molecules in complex gas mixtures, identifying fake perfumes and damaged plants. This approach has vast potential for agriculture, quality control of perfumes, and monitoring plant health.