• Crown-ethers bind to polyamine complexes through their second coordination sphere. (wikipedia.org)
  • Crown Ethers" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (wakehealth.edu)
  • This graph shows the total number of publications written about "Crown Ethers" by people in this website by year, and whether "Crown Ethers" was a major or minor topic of these publications. (wakehealth.edu)
  • Below are the most recent publications written about "Crown Ethers" by people in Profiles. (wakehealth.edu)
  • Cyclic chemical compounds including ether groups are called crown ethers. (nstri.ir)
  • For example, the fully substituted Azacrown complexes of Mn 2+ , Fe 2+ , and Co 2+ are about 16.8, 22.4, and 37.2 kcal/mol more stable than corresponded crown ethers complexes, respectively. (nstri.ir)
  • 2. M. Hernández Arganis, et al, Synthesis and structural study of alkali metal complexes derived from 1-phenyl-tetrazole-thiolate and crown ethers, Inorganica Chimica Acta, 475, 83-89 (2018). (nstri.ir)
  • All crown ethers have a central cavity that can accommodate a metal ion coordinated to the ring of oxygen atoms, and crown ethers with rings of different sizes prefer to bind metal ions that fit into the cavity. (komma-media.ro)
  • Crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups. (thtsearch.com)
  • The most common crown ethers are cyclic oligomers of ethylene oxide, the repeating unit being ethyleneoxy, i.e. (thtsearch.com)
  • This fully concerns the new group of compounds - crown-ethers, the molecular core of which is represented by macroheterocyclic systems with 9-60 atoms in the cycle. (edu.ua)
  • Ligands of interest are aromatic Schiff's bases, crown ethers, phthalamates and alkylamine dendrimers and their derivatives. (edu.jm)
  • Substitution of unsymmetrical organic cation in place of alkali metal cation of the inorganic chloride salt dramatically reduces the melting point of the resultant organic chloride to near ambient temperatures. (hindawi.com)
  • 1. S. Angelova, Complexation of IA and IIA group metal ions by N-phenylaza-15-crown-5 containing Schiff bases: A DFT study, Inorganica Chimica Acta, 487, 316-321 (2019). (nstri.ir)
  • 3. N. Islam, S.S. Chimni, Binding and selectivity of phenazino-18-crown-6-ether with alkali, alkaline earth and toxic metal species: A DFT study, Journal of Molecular Structure, 1130, 781-790 (2017). (nstri.ir)
  • Ba 2+ block is used here as a tool to determine the equilibrium binding affinity for various monovalent cations at specific sites in the selectivity filter of a noninactivating mutant of KcsA. (komma-media.ro)
  • Hirayama, K. (1967) Handbook of Ultraviolet and Visible Absorption Spectra of Organic Compounds. (photochemcad.com)
  • DMS, UV Atlas of Organic Compounds. (photochemcad.com)
  • CRC Atlas of Spectral Data and Physical Constants for Organic Compounds. (photochemcad.com)
  • Best Books On The Book Of Joshua, Hydroxides of alkali metals also can react with organic compounds that contain an acidic hydrogen to produce a salt. (komma-media.ro)
  • Volatile organic compounds (VOCs) off-gassing from synthetic materials, nitrogen dioxide and harmful outdoor VOCs such benzene, toluene, ethyl-benzene and xylene penetrate into the indoor environment through ventilation and are the main contributors to poor indoor air quality with health effects. (springer.com)
  • Установлено значительное влияние краун-эфиров на уровень активности системы ТТГ-Т3, Т4 и звеньев, которые ее контролируют и лежат под контролем.Within the recent years, xenobiochemistry (establishing biological action mechanism of chemical compounds, alien to the living organism, i.e. xenobiotics) gains extreme development, mostly due to brand new numerous substances, which are produced by organic synthesis industry. (edu.ua)
  • It would be best to relate them, however, to disorders in amino acid synthesis metabolism, where in addition to Nitrogen, some other additional nutrient may be involved, almost always some primary or secondary cation. (us.com)
  • Consequently, this branch of Chemistry can address and solve particularly unique problems ranging from catalytic industrial production issues to the synthesis and fabrication of compounds and materials relevant to nanotechnology. (uga.edu)
  • In particular, we are interested in the synthesis, stabilization, and structure of compounds containing multiple bonds between heavier main group elements (such as gallium and lead) and extending the concept of aromaticity beyond carbon ring systems to metallic ring systems-a phenomenon known as metalloaromaticity . (uga.edu)
  • Students engaged in this research will gain valuable experience in both organic and inorganic synthesis and become proficient in the synthesis and manipulation of air-sensitive compounds and materials (a very valuable technique in both the academic and industrial communities). (uga.edu)
  • An ionic compound is made of a positive cation and a negative anion. (komma-media.ro)
  • Some examples of the cation-anion combinations for making RTILs are shown in Table 1 . (hindawi.com)
  • In hexamminecobalt(III) chloride ([Co(NH3)6]Cl3), the cobalt cation plus the 6 ammonia ligands comprise the first coordination sphere. (wikipedia.org)
  • In the title compound, [Co(C 25 H 30 N 4 O 4 ) 2 ](ClO 4 ) 3 ·CH 3 OH·H 2 O, the metal atom is coordinated by two tridentate crown ether terpyridine ligands, forming a distorted CoN 6 octahedron. (elsevierpure.com)
  • abstract = "In the title compound, [Co(C25H30N4O4)2](ClO4)3·CH3OH·H2O, the metal atom is coordinated by two tridentate crown ether terpyridine ligands, forming a distorted CoN6 octahedron. (elsevierpure.com)
  • Crowning Li + ions by forming more stable and less diffusive crown ether-Li + complexes retards the generation of hygroscopic lithium oxides and mitigates Li + ion migration. (researchsquare.com)
  • First, 12-crown-4 as a lithium ionophore can selectively bond with Li + ions through coordination and promote the dissolution of LiTFSI in CB without requiring acetonitrile. (researchsquare.com)
  • Second, the crowned Li + ions with a larger size and mass become less active and more difficult to migrate, in turn posing a lowered threat to the device stability. (researchsquare.com)
  • We have research interest in polynuclear compounds of lanthanide(III), p- and d-block ions with potential biomedical, extractive metallurgical and catalytic applications. (edu.jm)
  • The complex, along with its counter ions, is called a coordination compound. (chemeurope.com)
  • Polyammonium cations bind to the nitrogen centres of cyanometallates. (wikipedia.org)
  • These compounds, called polyamides, have been cited in the scientific literature as Carbon-Nitrogen reserves in plant tissue. (us.com)
  • In order to understand the processes that allow for an accumulation of these compounds in plant organs, it is necessary to recall how Nitrogen is absorbed and metabolized within the plant. (us.com)
  • The effects of alkali metal cations with these Pcs has been investigated through the changes in the visible spectra. (itu.edu.tr)
  • Friedel, R. A. and M. Orchin (1951) Ultraviolet Spectra of Aromatic Compounds. (photochemcad.com)
  • The results showed that binding energies (ΔE) for titled metals are enhanced by increasing the number of replaced oxygen atoms in crowns structure. (nstri.ir)
  • The first number in a crown ether's name refers to the number of atoms in the cycle, and the second number refers to the number of those atoms that are oxygen. (thtsearch.com)
  • These compounds strongly bind to certain cations, forming complexes. (nstri.ir)
  • Léonard, N. G. * Charge and Solvent Effects on the Redox Behavior of Vanadyl Salen-Crown Complexes. (ucsb.edu)
  • Perspectives of borate structures containing crown ether complexes as templates are briefly outlined. (degruyter.com)
  • 12-crown-4 as an efficient phase transfer catalyst promotes the dissolution of LiTFSI without requiring acetonitrile. (researchsquare.com)
  • Chirik, P. J. Oxidative Addition of Dihydrogen, Boron Compounds, and Aryl Halides to a Cobalt(I) Cation Supported by a Strong-Field Pincer Ligand. (ucsb.edu)
  • I A Kahwa, A.S. Gajadhar-Plummer, A.J.P.White and D.J.Williams, "Chemistry of rare earth hypoco-ordinated cluster cations: Formation of novel oxoacetate clusters", Inorganica Chimica Acta 1998 , 281, 201. (edu.jm)
  • In the crystal, O-H···O and C-H···O hydrogen bonds, a π-π stacking interaction [centroid-centroid distance = 3.923 (7) Å] and a C-H···π interaction connect the complex cation, the perchlorate anions and the two types of solvent molecules, forming a three-dimensional network. (elsevierpure.com)
  • Some of the cations and anions used to form room-temperature ionic liquids. (hindawi.com)
  • Extraction of highly polar compounds, such as N-nitrosodimethylamine,oxamyl and methamidophos, and volatile compounds such as trihalomethanes. (thomassci.com)
  • Crystals of the first new organo-inorganic hybrid borate based on potassium crown ether complex, [K(C 12 H 24 O 6 )B 5 O 6 (OH) 4 ](H 2 O) ( 1 ), have been produced from aqueous solutions and characterized by single-crystal X-ray diffraction. (degruyter.com)
  • in the chemical formula, the cation will always appear first as well. (komma-media.ro)
  • Coordination number Ligand cone angle Coordination geometry What Is A Coordination Compound? (wikipedia.org)
  • 1963) Tables of Spectrophotometric Absorption Data of Compounds Used for the Colorimetric Determination of Elements. (photochemcad.com)
  • The Ammonium cation can thereby accumulate in the active root profile, thus forcing its absorption, while the absorption of other cations that are also needed is limited.The efficiency of our nutrition strategy is thus diminished. (us.com)
  • You will see that you can figure out the charge on a Type II metal cation in a given compound from either its formula or from its name. (komma-media.ro)
  • Several other alkali metal compounds are also important. (komma-media.ro)
  • Extraction and recovery of primary, secondary and some tertiary amines as well as most metal cations from aqueous solutions. (thomassci.com)
  • The problem arises when points start to be found of excess concentration of NH4 and nitrogenated compounds belonging to the amino acid formation cycle. (us.com)
  • Reversed phase, pi-pi and cation exchange interactions. (thomassci.com)
  • Molecular recognition technology-Crown Ether bonded Silica particles (12um) for Radium isotopes 226 and 228. (thomassci.com)
  • Soluble Ba compounds are highly toxic and may be used as insecticides. (komma-media.ro)
  • The term "crown" refers to the resemblance between the structure of a crown ether bound to a cation, and a crown sitting on a person's head. (thtsearch.com)
  • The quantitative structure - potentiometric response relationships were developed for a set of eighteen beta-adrenenergic drugs and a set of PVC based electrodes using TCPB alone or in admixture with trioctylated α-cyclodextrin, dibenzo-18-crown-6 or calix[6]arene hexaethylacetate ester. (eurekaselect.com)
  • Our laboratory has been studying difficult problems relating to fundamental issues of structure and bonding in organometallic compounds. (uga.edu)
  • Avoid using products that contain baking soda, as the compounds are highly abrasive and can eat away at bonded teeth or veneers. (azfamilydental.com)
  • The aim of study is to determine the mucolytic activity of flavonol compound namely 3,5, 7,3',4'-pentahydroxy flavone (quercetine), isolated from acetone extract of the silver fern (P. calomelanos). (atlantis-press.com)
  • They have several attractive properties suitable for industrial exploitation such as insignificant vapour pressure, large liquidus range, good electrical conductivity and thermal stability, wide electrochemical window, and amazing ability to dissolve organic and inorganic compounds In view of this, RTILs are being explored for various applications [ 7 - 13 ]. (hindawi.com)
  • Crownethers (See: crown) having a side chain that holds one or more additional coordinating sites. (iupac.org)
  • Potentiometric detection with poly(vinyl chloride) (PVC) based liquid membrane electrode coatings is presented for a series of eighteen beta-adrenoceptor binding drugs (five agonists and thirteen antagonists) in cation exchange-HPLC and RP-HPLC systems. (eurekaselect.com)
  • At the same time, one must not lose sight of management issues such as the size of the crown or root volume. (us.com)
  • Of concrete solidification, production of synthetic solid at normal room temperatures, but as well mercury And carbon are the elements in nature and can easily form compounds in which the metals exhibit an oxidation of. (komma-media.ro)
  • H part is combining between two element to form a unique compound which is the 1st 1 is cesium and the PR. (komma-media.ro)
  • Whether it is a treatment to whiten the teeth or the attachment of a dental crown, cosmetic dentistry provides long-term solutions for patients who deal with poor function, discomfort, and low confidence because of their teeth. (azfamilydental.com)
  • Principal components analysis (PCA) of data considering determined potentiometric detection limits revealed that it can be used to establish a reliable pharmacological classification of compounds with beta-adrenoceptor activity, especially for the differentiation of cardioselective and non-cardioselective beta1-antagonists. (eurekaselect.com)