These are organized by a classification scheme developed exclusively for Cosma. More…
NIST Chemistry WebBook
Physical and Chemical Properties Resources (UC Berkeley Physics and Astronomy Library)
CRC Handbook of Chemistry and Physics Online (99th Edition)
ChemSpider: Free Chemical Structure Database
Chemistry Calculators (Calculator.com)
matter : material substance that occupies space, has mass, and is composed predominantly of atoms consisting of protons, neutrons, and electrons, that constitutes the observable universe, and that is interconvertible with energy — Webster
Matter is any substance that has mass and takes up space by having volume. All everyday objects that we can touch are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, “matter” generally includes atoms and anything made up of them, and any particles (or combination of particles) that act as if they have both rest mass and volume. However it does not include massless particles such as photons, or other energy phenomena or waves such as light or sound.
Matter exists in various states (also known as phases). These include classical everyday phases such as solid, liquid, and gas – for example water exists as ice, liquid water, and gaseous steam – but other states are possible, including plasma, Bose–Einstein condensates, fermionic condensates, and quark–gluon plasma.
Usually atoms can be imagined as a nucleus of protons and neutrons, and a surrounding “cloud” of orbiting electrons which “take up space”. However this is only somewhat correct, because subatomic particles and their properties are governed by their quantum nature, which means they do not act as everyday objects appear to act – they can act like waves as well as particles and they do not have well-defined sizes or positions.
In the Standard Model of particle physics, matter is not a fundamental concept because the elementary constituents of atoms are quantum entities which do not have an inherent “size” or “volume” in any everyday sense of the word. Due to the exclusion principle and other fundamental interactions, some “point particles” known as fermions (quarks, leptons), and many composites and atoms, are effectively forced to keep a distance from other particles under everyday conditions; this creates the property of matter which appears to us as matter taking up space. — Wikipedia
Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds. Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. — Wikipedia
Journal of the American Chemical Society: Latest Articles (ACS Publications) latest articles published in Journal of the American Chemical Society
- [ASAP] Multiple Transformations among Anion-based...by Boyang Li, Wenyao Zhang, Shuai Lu, Bo Zheng, Dan Zhang, Anyang Li, Xiaopeng Li, Xiao-Juan Yang, and Biao Wu on December 3, 2020 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c10346
- [ASAP] Solvent Effects on the Self-Assembly of an...by Avanashiappan Nandakumar, Yoshihiro Ito, and Motoki Ueda on December 3, 2020 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c03425
- [ASAP] Pyrimidazole-Based Covalent Organic...by Jiao Liu, Tong Yang, Zhi-Peng Wang, Peng-Lai Wang, Jie Feng, San-Yuan Ding, and Wei Wang on December 3, 2020 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c10919
- [ASAP] Flexible Polypropylene-Supported ZIF-8...by Yali Zhao, Yanying Wei, Luxi Lyu, Qianqian Hou, Jürgen Caro, and Haihui Wang on December 3, 2020 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c07481
- [ASAP] Ni-Catalyzed Regioselective...by Roshan K. Dhungana, Rishi R. Sapkota, Laura M. Wickham, Doleshwar Niroula, and Ramesh Giri on December 3, 2020 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c09778
Nature Chemistry Nature Chemistry is a monthly journal dedicated to publishing high-quality papers that describe the most significant and cutting-edge research in all areas of chemistry. As well as reflecting the traditional core subjects of analytical, inorganic, organic and physical chemistry, the journal features a broad range of chemical research including, but not limited to, bioinorganic and bioorganic chemistry, catalysis, computational and theoretical chemistry, environmental chemistry, green chemistry, medicinal chemistry, organometallic chemistry, polymer chemistry, supramolecular chemistry and surface chemistry. Other multidisciplinary topics such as nanotechnology, chemical biology and materials chemistry are also featured.
- A metal–organic framework that exhibits...by Jun Zhang on November 30, 2020 at 12:00 am
Nature Chemistry, Published online: 30 November 2020; doi:10.1038/s41557-020-00577-yMetal–organic frameworks (MOFs) can combine porosity and magnetic order within their lattice, which makes them attractive for the development of stimuli-responsive magnets. Now, a MOF has been prepared that converts from a ferrimagnet to a paramagnet with CO2 uptake, and returns to the ferrimagnetic state on releasing CO2.
- Protein folding modulates the chemical reactivity...by Alvaro Alonso-Caballero on November 30, 2020 at 12:00 am
Nature Chemistry, Published online: 30 November 2020; doi:10.1038/s41557-020-00586-xBacteria use thioester-bond-containing proteins to covalently bind to host surfaces and withstand large mechanical shocks. Now, thioester bond reactivity has been shown to be force-dependent: forces >35 pN inhibit bond cleavage by primary amine ligands, whereas forces
- Competition between chiral solvents and chiral...by Marcin L. Ślęczkowski on November 30, 2020 at 12:00 am
Nature Chemistry, Published online: 30 November 2020; doi:10.1038/s41557-020-00583-0Mirror-symmetry breaking in chiral systems by a chiral solvent has remained poorly understood for decades. Now, the supramolecular polymerization of triphenylene derivatives has shown that—through the additive effects of polymerization—the cumulative entropic effects of the interactions between chiral solvents and solutes create measurable differences in free enthalpy.
- Determining the nature of quantum resonances by...by Prerna Paliwal on November 30, 2020 at 12:00 am
Nature Chemistry, Published online: 30 November 2020; doi:10.1038/s41557-020-00578-xLow-temperature scattering leads to the formation of quantum resonances or quasi-bound states, which are observable as peaks in the measured collision cross-sections. Now it has been shown that two different formation mechanisms, quantum tunnelling and quantum reflection, can be distinguished by measuring and comparing elastic and inelastic scattering, which probe the spatial localization of the resonance […]
- Isolable dicarbon stabilized by a single...by Tsz-Fai Leung on November 30, 2020 at 12:00 am
Nature Chemistry, Published online: 30 November 2020; doi:10.1038/s41557-020-00579-wDiatomic C2 is an elusive species that has only been indirectly observed in the gas phase. It had previously been stabilized in the condensed phase using two ligands, but now a monoligated L→C2 complex has been prepared with a bulky phosphine ligand (L) bearing two imidazolidin-2-iminato groups. Reactivity studies and theoretical quantum chemical analysis point to the C2 moiety having a dicarbene character.
Geochemistry News -- ScienceDaily Earth and Climate Chemistry. Full text articles on organic and inorganic chemistry in the environment. Updated daily.
- Robot fleet dives for climate answers in 'marine...on December 3, 2020 at 4:32 pm
Sailing from Hobart, twenty researchers hope to capture the most detailed picture yet of how marine life in the Southern Ocean captures and stores carbon from the atmosphere.
- New glue sticks easily, holds strongly, and is a...on December 2, 2020 at 1:52 pm
Research introduces temporary adhesives that don't require tearing or ripping to pull apart.
- Bleach-alternative COVID-19 surface disinfectants...on December 1, 2020 at 7:40 pm
Cleaning surfaces with hydrogen peroxide-based disinfectants has the potential to pollute the air and pose a health risk, according to new research.
- Ultrasensitive transistor for herbicide detection...on December 1, 2020 at 5:41 pm
Researchers have fabricated a tiny electronic sensor that can detect very low levels of a commonly used weed killer in drinking water.
- Collision models impact the future of energyon December 1, 2020 at 5:41 pm
A new database of electron-molecule reactions is a major step forward in making nuclear fusion power a reality, by allowing researchers to accurately model plasmas containing molecular hydrogen.
Scientific American - Chemistry Science news and technology updates from Scientific American
- Inventing Us: How Inventions Shaped Humanityby Ainissa G. Ramirez on December 3, 2020 at 5:07 pm
Materials scientist and science writer Ainissa Ramirez talks about her latest book The Alchemy of Us: How Humans and Matter Transformed One Another. -- Read more on ScientificAmerican.com
- Eating Turkey Does Not Really Make You Sleepyby Jason Kane on November 26, 2020 at 10:00 pm
Don't blame the tryptophan in your Thanksgiving turkey. The post-dinner drowsiness probably results from carbs and alcohol -- Read more on ScientificAmerican.com
- Do Wine over Those Brussels Sproutsby Christopher Intagliata on November 25, 2020 at 5:00 pm
Taking a swig of red wine before eating Brussels sprouts appears to moderate Brussels sprouts' polarizing flavor. Christopher Intagliata reports -- Read more on ScientificAmerican.com
- A Butterfly's Brilliant Blue Wings Lead to Less...by Meg Wilcox on November 13, 2020 at 11:45 am
A phenomenon known as structural color could be translated to a range of commercial products -- Read more on ScientificAmerican.com
- Low-Carbon Cement Can Help Combat Climate Changeby Mariette DiChristina on November 12, 2020 at 2:05 pm
Microbes will help decarbonize the construction industry -- Read more on ScientificAmerican.com
Chemistry News - Biochemistry, Polymers, Materials Science The latest news stories on chemistry, biochemistry, polymers, materials science from Phys.org
- Polymer researcher's latest development results...on December 4, 2020 at 1:10 pm
A University of Akron (UA) professor's latest development in bioplastics has the potential to make important strides in sustainability for future plastics.
- Chemists get peek at novel fluorescence in carbon...on December 4, 2020 at 9:30 am
That carbon nanotubes fluoresce is no longer a surprise. Finding a second level of fluorescence is surprising and potentially useful.
- Titanium atom that exists in two places at once...on December 3, 2020 at 9:12 pm
The crystalline solid BaTiS3 (barium titanium sulfide) is terrible at conducting heat, and it turns out that a wayward titanium atom that exists in two places at the same time is to blame.
- Marine mammals' adaptations to low oxygen offer...on December 3, 2020 at 9:07 pm
When Terrie Williams began hearing about the wide range of symptoms experienced by patients with COVID-19, she saw a connection between the various ways the disease is affecting people and the many physiological adaptations that have enabled marine mammals to tolerate low oxygen levels during dives.
- High speed filming reveals protein changes during...on December 3, 2020 at 3:45 pm
Photosynthesis is the primary source of energy for almost all life-on-earth. A new study, published in Nature, provide new insight into how evolution has optimized the light-driven movements of electrons in photosynthesis to achieve almost perfect overall efficiency.