Recent devastating fires in the Amazon rain forest and the Australian bush highlight the need to detect forest fires at early stages, before they blaze out of control. Current methods include infrared imaging satellites, ...
Analytical Chemistry
Jun 17, 2020
0
5
Scientists at Japan's Institute for Integrated Cell-Material Sciences (iCeMS) are leading efforts to synthesize stronger and efficient materials for hydrogen fuel cell membranes. Most fuel cells currently on the market employ ...
Polymers
May 13, 2020
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118
A RUDN University chemist has discovered four new stable compounds that can be obtained in the reaction of iodine with methylammonium iodide—the use of these substances will allow the production of perovskite solar panels ...
Materials Science
Feb 07, 2020
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29
In many parts of the world, access to clean drinking water is far from certain. Filtration of large volumes of water, however, is slow and impractical. In the journal Angewandte Chemie, scientists have introduced a new water ...
Nanomaterials
Nov 29, 2019
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26
Supported single-atom catalysts (SACs) have emerged as a new frontier in heterogeneous catalysis and have attracted broad interest for their demonstrated good catalytic performance due to high atomic efficiency and relatively ...
Materials Science
Nov 04, 2019
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5
Supercapacitors, electrical devices that store and release energy, need a layer of electrolyte—an electrically conductive material that can be solid, liquid, or somewhere in between. Now, researchers at MIT and several ...
Materials Science
Aug 13, 2019
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44
An international team of scientists, including a professor of chemistry from the University of Bristol, has worked out a way to improve energy storage devices called supercapacitors, by designing a new class of detergents ...
Materials Science
Aug 12, 2019
12
547
As populations boom and chronic droughts persist, coastal cities like Carlsbad in Southern California have increasingly turned to ocean desalination to supplement a dwindling fresh water supply. Now scientists at the Department ...
Materials Science
Jul 31, 2019
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1343
Ping! The popular 1990 film, The Hunt for Red October, helped introduce sonar technology on submarines to pop culture. Now, nearly 30 years later, a team of scientists at the University of Missouri is using this same sonar ...
Analytical Chemistry
Jul 08, 2019
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12
Machine bearings are usually lubricated with various oils. But today large quantities of these oils still end up in the environment. The Fraunhofer Institute for Mechanics of Materials IWM has developed a method which will ...
Engineering
Jul 01, 2019
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0
Ionic liquids, originally known as liquid electrolytes, ionic melts, ionic fluids, fused salts, liquid salts, or ionic glasses, are liquids comprised predominantly of ions and ion-pairs at some given temperature. Ordinary table salt, or, sodium chloride, consists of sodium cations (Na+) and chloride anions (Cl−) that when heated to several hundred degrees, forms a liquid containing predominantly ions. While many combinations of bulkier and often more asymmetric organic ions also form well defined crystals, with well defined melting points, many instead form glasses prior to thermodynamically stable crystal lattice formation where the cyrstallization kinetics are extremely slow. For example, the salt 1-ethyl-3-methylimidazolium dicyanamide, [C2mim][N(CN)2], melts at Tm = -21 °C, pyridinium chloride, [PyH]Cl, exhibits a melting point of Tm = 144.5 °C but 1-butyl-3,5-dimethylpyridinium bromide, [N-butyl-3,5-dimethyl-Py]Br, exhibits glass formation at Tg = -24 °C.
The term, ionic liquid, includes all classical molten salts, which are comprised of more thermally stable ions, such as sodium with chloride or potassium with nitrate, and has been attested as early as 1943. Recently, it has come to be used for salts whose melting point is below an arbitrary set point of 100 °C. There also exist mixtures of substances which have low melting points, called deep eutectic solvents, or DES, that have many similarities with ionic liquids.
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