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] Lewis-Acid-Promoted Ligand-Controlled...by Weiwei Chai, Qingyang Zhou, Wenna Ai, Yin Zheng, Tianzhu Qin, Xiufang Xu, and Weiwei Zi on February 25, 2021 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c13412
- [ASAP] Modular Design of G-Quadruplex...by Philip M. Punt, Marie D. Langenberg, Okan Altan, and Guido H. Clever on February 25, 2021 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c13251
- [ASAP] Taming the Topology of Calixarene-Based...by Bikash Garai, Dinesh Shetty, Tina Skorjanc, Felipe Gándara, Nawavi Naleem, Sabu Varghese, Sudhir Kumar Sharma, Maria Baias, Ramesh Jagannathan, Mark A. Olson, Serdal Kirmizialtin, and Ali Trabolsi on February 25, 2021 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c12125
- [ASAP] Sulfur [18F]Fluoride Exchange...by Qinheng Zheng, Hongtao Xu, Hua Wang, Wen-Ge Han Du, Nan Wang, Huan Xiong, Yuang Gu, Louis Noodleman, K. Barry Sharpless, Guang Yang, and Peng Wu on February 25, 2021 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c09306
- [ASAP] SmI2-Catalyzed Intermolecular...by Soumitra Agasti, Nicholas A. Beattie, Joseph J. W. McDouall, and David J. Procter on February 25, 2021 at 5:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c01356
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.
- Author Correction: Direct observation of coherent...by Elisa Biasin on February 24, 2021 at 12:00 am
Nature Chemistry, Published online: 24 February 2021; doi:10.1038/s41557-021-00663-9Author Correction: Direct observation of coherent femtosecond solvent reorganization coupled to intramolecular electron transfer
- Abiotic reduction of ketones with silanes...by Pengfei Ji on February 18, 2021 at 12:00 am
Nature Chemistry, Published online: 18 February 2021; doi:10.1038/s41557-020-00633-7Enzymatic reactions involving mononuclear metal hydrides are unknown in nature, despite the prevalence of such intermediates in synthetic transition-metal catalysed reactions. Now, it has been shown that zinc-containing carbonic anhydrase enzymes can catalyse hydride transfers from silanes to ketones with high enantioselectivity and there is evidence to support the intermediacy of a mononuclear zinc hydride.
- Predicting the stability of homotrimeric and...by Douglas R. Walker on February 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 February 2021; doi:10.1038/s41557-020-00626-6Collagen-like peptides can self-assemble into hundreds of closely related triple helices. Now, an algorithm has been developed that predicts the most stable helix and the extent to which it will assemble to the exclusion of the competing helices. This information can help improve the understanding of triple helix design and assembly.
- Metal–organic frameworks embedded in a liposome...by Huihui Hu on February 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 February 2021; doi:10.1038/s41557-020-00635-5Some metal–organic frameworks (MOFs) can promote photocatalytic hydrogen evolution and others can facilitate water oxidation, but it is difficult to combine them into a single system. Now, by confining MOFs that can promote each half-reaction within the hydrophobic and hydrophilic regions of a liposome to avoid the fast recombination of photo-generated charges, evidence for water splitting has been obtained.
- Illuminating the dark conformational space of...by Diego B. Diaz on February 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 February 2021; doi:10.1038/s41557-020-00620-yConstrained molecules typically adopt one major conformation and this limitation prevents the study of other energetically less-favourable conformations. Nevertheless, these alternate structures might prove to be useful and it has now been shown that a dominant rotor method can alter the energetic landscape of peptides to create two-well systems with distinct conformational behaviour.
Geochemistry News -- ScienceDaily Earth and Climate Chemistry. Full text articles on organic and inorganic chemistry in the environment. Updated daily.
- Molecular bridges power up printed electronicson February 25, 2021 at 4:31 pm
Researchers have boosted the efficiency of conductive inks and devices connecting layered materials flakes with small molecules.
- Nature's funhouse mirror: Understanding asymmetry...on February 24, 2021 at 7:34 pm
The results of a new experiment could shift research of the proton by reviving previously discarded theories of its inner workings.
- Oxidation processes in combustion engines and in...on February 23, 2021 at 9:44 pm
Alkanes, an important component of fuels for combustion engines and an important class of urban trace gases, react via another reaction pathways than previously thought. These hydrocarbons, formerly called paraffins, thus produce large amounts of highly oxygenated compounds that can contribute to organic aerosol and thus to air pollution in cities. The results of this interdisciplinary work provide crucial information about oxidation processes both in combustion engines and in the atmosphere.
- New gene-editing tool allows for programming of...on February 23, 2021 at 8:08 pm
Researchers have discovered a new gene-editing technique that allows for the programming of sequential cuts -- or edits -- over time.
- Researchers challenge the Conservation Reserve...on February 23, 2021 at 4:07 pm
Amid population expansion and severe climate conditions threatening agricultural productivity, sustainable food production is a national priority. Simultaneously, advances in bioenergy agriculture are necessary to move our energy sector away from fossil fuels.
Scientific American - Chemistry Science news and technology updates from Scientific American
- Even Tiny Phytoplankton Have Microbiomesby Leslie Nemo on February 19, 2021 at 5:00 pm
These algae exchange vital chemicals with bacteria that live around their surface -- Read more on ScientificAmerican.com
- Remembering the Extraordinary Scientist Paul...by Jan Zalasiewicz on February 5, 2021 at 12:00 pm
Among other things, he explored the concept of nuclear winter, won a Nobel for his role in helping understand atmospheric ozone depletion and coined the term “Anthropocene” -- Read more on ScientificAmerican.com
- Newly Studied Proteins Expand CRISPR's Editing...by Niko McCarty on February 1, 2021 at 11:45 am
A catalog of Cas9 proteins could provide gene-editing variety -- Read more on ScientificAmerican.com
- How the First Life on Earth Survived Its Biggest...by Michael Marshall on December 16, 2020 at 3:30 pm
Living things depend on water, but it breaks down DNA and other key molecules. So how did the earliest cells deal with the water paradox? -- Read more on ScientificAmerican.com
- Eye Treatment Stretches Mouse Sight Beyond...by Karen Hopkin on December 12, 2020 at 5:53 pm
Nanoparticles that attach to photoreceptors allowed mice to see infrared and near-infrared light for up to two months. -- Read more on ScientificAmerican.com
Chemistry News - Biochemistry, Polymers, Materials Science The latest news stories on chemistry, biochemistry, polymers, materials science from Phys.org
- Theory could accelerate push for spintronic...on February 25, 2021 at 7:57 pm
A new theory by Rice University scientists could boost the growing field of spintronics, devices that depend on the state of an electron as much as the brute electrical force required to push it.
- Building bridges between atoms and making...on February 25, 2021 at 5:23 pm
Similar to the fact that a person would act differently when being alone, materials can also obtain unique qualities when being separated in atom-level, among which is the enhanced catalyzing ability.
- Collaboration leads to 2-D polymer discoveryon February 25, 2021 at 5:04 pm
Army researchers reached a breakthrough in the nascent science of two-dimensional polymers thanks to a collaborative program that enlists the help of lead scientists and engineers across academia known as joint faculty appointments.
- On the line: Watching nanoparticles get in shapeon February 25, 2021 at 8:04 am
Liquid structures—liquid droplets that maintain a specific shape—are useful for a variety of applications, from food processing to cosmetics, medicine, and even petroleum extraction, but researchers have yet to tap into these exciting new materials' full potential because not much is known about how they form.
- An intelligent soft material that curls under...on February 24, 2021 at 5:41 pm
Plants and animals can rapidly respond to changes in their environment, such as a Venus flytrap snapping shut when a fly touches it. However, replicating similar actions in soft robots requires complex mechanics and sensors. Now, researchers reporting in ACS Applied Materials & Interfaces have printed liquid metal circuits onto a single piece of soft polymer, creating an intelligent material that curls under pressure or mechanical strain.