A novel push-pull Diels-Alder diene: reactions of 4-alkoxy- or 4-phenylsulfenyl-5-chalcogene-substituted 1-phenylpenta-2,4-dien-1-one with electron-deficient dienophiles. (1/16)
5-(phenylselenenyl)- and 5-(phenylsulfenyl)-4-ethoxy-1-phenyl-2,4-pentadien-1-ones (2) and (3) underwent [4+2] cycloaddition with N-methyl and N-phenylmaleimides and successive isomerization to give the 7-benzoyl-3a,4,5,7a-tetrahydro-1H-isoindole-1,3(2H)-diones 5, 8 and 9 in good yields. The 4-ethoxy group on the 2,4-pentadien-1-one was found to be effective to facilitate the cycloaddition with dienophiles. We also performed other [4+2] cycloadditions of 2,4-pentadien-1-ones with DMAD or naphthoquinone. (+info)Redox catalysts as sensitisers towards oxidative stress. (2/16)
The predominance of oxidative stress in many tumour cell environments provides a means to selectively target these cells via protein oxidation. The zinc fingers of transcription factors utilise cysteine thiols for structural zinc coordination. Redox control of DNA binding regulates transcription and therefore the overall rates of proliferation, apoptosis and necrosis in the carcinoma. We report here the adverse effects of glutathione peroxidase (GPx) mimics towards zinc finger motifs and PC12 cell survival. Nanomolar catalyst concentrations facilitated H2O2-induced oxidation of an Sp1 transcription factor fragment. In PC12 cells GPx catalysis triggered a significant increase in cell death, correlating with severity of oxidative stress. As a consequence, we conclude that GPx mimics are potential chemotherapeutic agents. (+info)Synthesis and properties of benzo[a]phenoxazinium chalcogen analogues as novel broad-spectrum antimicrobial photosensitizers. (3/16)
The goal of this investigation was to develop improved photosensitizers for use as antimicrobial drugs in photodynamic therapy of localized infections. Replacement of the oxygen atom in 5-(ethylamino)-9-diethylaminobenzo[a]phenoxazinium chloride (1) with sulfur and selenium afforded thiazinium and selenazinium analogues 2 and 3, respectively. All three dyes are water soluble, lipophilic, and red light absorbers. The relative photodynamic activities of the chalcogen series were evaluated against a panel of prototypical pathogenic microorganisms: the Gram-positive Enterococcus faecalis, the Gram-negative Escherichia coli, and the fungus Candida albicans. Selenium dye 3 was highly effective as a broad-spectrum antimicrobial photosensitizer with fluences of 4-32 J/cm2 killing 2-5 more logs of all cell types than sulfur dye 2, which was slightly more effective than oxygen analogue 1. These data, taken with the findings of uptake and retention studies, suggest that the superior activity of selenium derivative 3 can be attributed to its much higher triplet quantum yield. (+info)Cesium carbonate-catalyzed alpha-phenylchalcogenation of carbonyl compounds with diphenyl dichalcogenide. (4/16)
(+info)Intramolecular chalcogen-tin interactions in [(o-MeEC6H4)CH2]2SnPh(2-n)Cl(n) (E = S, O, CH2; n = 0, 1, 2) and intermolecular chlorine-tin interactions in the meta- and para-methoxy isomers. (5/16)
(+info)Mitochondrial dysfunction induced by different organochalchogens is mediated by thiol oxidation and is not dependent of the classical mitochondrial permeability transition pore opening. (6/16)
(+info)Mysteries of TOPSe revealed: insights into quantum dot nucleation. (7/16)
(+info)Chalcogenidobis(ene-1,2-dithiolate)molybdenum(IV) complexes (chalcogenide E = O, S, Se): probing Mo identical withE and ene-1,2-dithiolate substituent effects on geometric and electronic structure. (8/16)
(+info)
Chalcogen
... there are a total of 13 chalcogen fluorides, nine chalcogen chlorides, eight chalcogen bromides, and six chalcogen iodides that ... Chalcogens also form compounds with halogens known as chalcohalides, or chalcogen halides. The majority of simple chalcogen ... Such compounds tend to feature sulfur as the chalcogen. There are also chalcogen borides with two, three, or four chalcogens. ... Almost all chalcogen pnictide salts are typically in the form of [PnxE4x]3−, where Pn is a pnictogen and E is a chalcogen.[ ...
Chalcogen bond
... chalcogen bonding can occur between two chalcogens, resulting in a chalcogen-chalcogen bond. Non-covalent interactions are well ... chalcogen-chalcogen bonding will be favored. It is hypothesized that electrostatic forces should only dominate in a chalcogen- ... "Theoretical Investigations on Heteronuclear Chalcogen−Chalcogen Interactions: On the Nature of Weak Bonds between Chalcogen ... Chalcogen bonding is a result of the same interaction. However, it is possible for chalcogens to form multiple sigma bonds and ...
Interchalcogen
The chalcogens react with each other to form interchalcogen compounds. Although no chalcogen is extremely electropositive, nor ...
Block (periodic table)
... the chalcogens; 17, the halogens; and 18, the helium group, composed of the noble gases (excluding helium) and oganesson. ...
Catalytic triad
These elements are all in the 16th periodic table column (chalcogens), so have similar properties. In each case, changing the ... Devillanova FA, Du Mont W (2013). Handbook of Chalcogen Chemistry. Vol. 1: new perspectives in sulfur, selenium and tellurium ( ... Bouroushian M (2010). "Electrochemistry of the Chalcogens". Electrochemistry of Metal Chalcogenides. Monographs in ...
Giuseppe Resnati
The Chalcogen Bond in Crystalline Solids: A World Parallel to Halogen Bond Accounts of Chemical Research 2019, 52, 1311-1324 ( ... He has a particular focus on self-assembly processes driven by halogen bonds and chalcogen bonds. Resnati was born in Monza, ... chalcogen bond. green chemistry van der Waals Prize 2021 (awarded in 2022 by the 2nd International Conference on Noncovalent ...
Tellurocysteine
Chivers, Tristram; Laitinen, Risto S. (23 March 2015). "Tellurium: a maverick among the chalcogens". Chemical Society Reviews. ...
Lead
Molten lead reacts with the chalcogens to give lead(II) chalcogenides. Lead metal resists sulfuric and phosphoric acid but not ... Lead commonly reacts with heavier chalcogens. Lead sulfide is a semiconductor, a photoconductor, and an extremely sensitive ...
Nucleoside phosphoramidite
Similarly, phosphoramidites react with other chalcogens. When brought in contact with a solution of sulfur or a number of ...
Tellurium
Wickleder, Mathias S. (2007). "Chalcogen-Oxygen Chemistry". In Francesco A. Devillanova (ed.). Handbook of chalcogen chemistry ... Of the chalcogens (oxygen-family elements), tellurium has the highest melting and boiling points, at 722.66 K (449.51 °C) and ... Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found in native ... ISBN 0-12-023627-3. Xu, Zhengtao (2007). "Recent developments in binary halogen-chalcogen compounds, polyanions and polycations ...
Tellurium compounds
Wickleder, Mathias S. (2007). "Chalcogen-Oxygen Chemistry". In Francesco A. Devillanova (ed.). Handbook of chalcogen chemistry ... Tellurium compounds are compounds containing the element tellurium (Te). Tellurium belongs to the chalcogen (group 16) family ... ISBN 0-12-352651-5. Xu, Zhengtao (2007). "Recent developments in binary halogen-chalcogen compounds, polyanions and polycations ... a highly unstable analogue of the other chalcogen hydrides, H 2O, H 2S and H 2Se: ZnTe + 2 HCl → ZnCl 2 + H 2Te H 2Te is ...
Thiazyl trifluoride
Chivers, Tristram; Laitinen, Risto S. (2006). "Chalcogen-Nitrogen Chemistry". In Devillanova, Francesco (ed.). Handbook of ... Chalcogen Chemistry. London: The Royal Society of Chemistry. p. 238. doi:10.1039/9781847557575. ISBN 978-0-85404-366-8. Steve ...
Metal dithiolene complex
Handbook of Chalcogen Chemistry. Vol. 2. pp. 127-179. doi:10.1039/9781849737463-00127. ISBN 978-1-84973-624-4. Retrieved 2021- ... Handbook of Chalcogen Chemistry: 797-830. doi:10.1039/9781847557575-00797. (Coordination complexes, Thiols, Chelating agents, ...
Polonium
... is a chalcogen. A rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to ... Chalcogens, Post-transition metals, Element toxicology, IARC Group 1 carcinogens, Science and technology in Poland, Marie Curie ...
Selenium disulfide
"Chalcogen ring interconversion pathways. 77Se NMR spectroscopic study of the decomposition of 1,2,3,4,5-Se5S2 to 1,2,3,4,5,6- ...
Period 4 element
Selenium is a chalcogen. Selenium is red in monomolar structure but metallic gray in its crystalline structure. Bromine (Br) is ...
Allotropes of sulfur
Gregoryanz E; Struzhkin V; Hemley, R J; Eremets, M I; Mao Ho-Kwang; Timofeev Y A (2002). "Superconductivity in the chalcogens ...
Barium
Reactions with chalcogens are highly exothermic (release energy); the reaction with oxygen or air occurs at room temperature. ...
List of aqueous ions by element
Ⓚ Of 103 elements shown in the image, just ten form anions, all of these being in the p-block: arsenic; the five chalcogens: ...
Astatine
... may form bonds to the other chalcogens; these include S7At+ and At(CSN)−2 with sulfur, a coordination selenourea ...
Astatine compounds
Astatine may form bonds to the other chalcogens; these include S7At+ and At(CSN)− 2 with sulfur, a coordination selenourea ...
Phosphorus halide
Mixed chalcogen halides also exist. In the gas phase the phosphorus pentahalides have trigonal bipyramidal molecular geometry ... The trihalides are fairly readily oxidized by chalcogens to give the corresponding oxyhalides or equivalents. Phosphorus(II) ...
Selenosulfide
2. Unsymmetrical Diatomic Chalcogen Bridges". Journal of the American Chemical Society. 99 (23): 7743-7744. doi:10.1021/ ...
Tetrasulfur tetranitride
Kelly, P. F.; Slawin, A. M. Z.; Williams, D. J.; Woollins, J. D. (1992). "Caged explosives: Metal-Stabilized Chalcogen Nitrides ... Chivers, T. (2004). A Guide To Chalcogen-Nitrogen Chemistry. Singapore: World Scientific Publishing. ISBN 981-256-095-5. Sharma ...
Lithium telluride
"Phase Equilibria in Lithium-Chalcogen Systems". Journal of the Electrochemical Society. The Electrochemical Society. 120 (3): ...
Disulfur
"Recent chemistry of the chalcogen diatomics". Tetrahedron. 53 (36): 12225-12236. doi:10.1016/S0040-4020(97)00555-3. Spencer, J ...
Iron-based superconductor
It has also been found that some iron chalcogens superconduct. The undoped β-FeSe is the simplest iron-based superconductor but ...
Gallium compounds
Gallium reacts with the chalcogens only at relatively high temperatures. At room temperature, gallium metal is not reactive ...
Gallium
... reacts with the chalcogens only at relatively high temperatures. At room temperature, gallium metal is not reactive ...
Lewis acidic antimony compounds
Chalcogen, and Halogen Bonds". Angewandte Chemie International Edition. 57 (19): 5408-5412. doi:10.1002/anie.201801452. PMC ...
Sulfur - Wikipedia
MPDS index | Alkaline, Chalcogen, Disordered, Lanthanoid, Rare earth, Cu-La-O-Sr, Seebeck coefficient, Tetragonal
Highly Microporous Carbon from Enteromorpha for High‐Performance Aqueous Zinc‐chalcogen (S, SeS2) Batteries | GDCh.app
Rechargeable aqueous zinc-chalcogen batteries have become a rising star in the energy storage systems due to the high abundance ... As a cathode for aqueous zinc-chalcogen batteries, HMCs-3@S delivers a high reversible discharge capacity (591 mAh g−1 at 0.1 A ... Highly Microporous Carbon from Enteromorpha for High‐Performance Aqueous Zinc‐chalcogen (S, SeS2) Batteries. ... was synthesized as a sulfur-loaded cathode for aqueous zinc-chalcogen batteries. A high specific surface area (3349.4 m2 g−1) ...
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N-(2-aminoethyl)-5-chloroisoquinoline-8-sulfonamide - Ontology Report - Rat Genome Database
Publication Detail
Structure of Cu Ions in (Cu+Halogen or Chalcogen)-Ion Implanted Silica Glasses | 東京工業大学附属図書館 文献
Understanding the structure and structural degradation mechanisms in high-voltage lithium-ion battery cathode oxides. A review...
MeSH Browser
Chalcogens Preferred Concept UI. M0027193. Registry Number. 0. Scope Note. The elements OXYGEN; POLONIUM; SELENIUM; SULFUR; and ... Chalcogens Preferred Term Term UI T053841. Date01/01/1999. LexicalTag NON. ThesaurusID NLM (1994). ... Chalcogens. Tree Number(s). D01.268.185. Unique ID. D018011. RDF Unique Identifier. http://id.nlm.nih.gov/mesh/D018011 ...
Biomarkers Search
Demos File Categories › Page 2 › PDRoms - Homebrew 4 you
Drug-drug Interaction and Drug-drug Interaction Evidence Ontology</obo:IAO...
Large area chemical vapour deposition grown transition metal dichalcogenide monolayers automatically characterized through...
Betaxolol Hydrochloride|N0000004400
Can AlphaFold2 predict the impact of missense mutations on structure? - PubMed
DeCS
MeSH Browser
Chalcogens Preferred Concept UI. M0027193. Registry Number. 0. Scope Note. The elements OXYGEN; POLONIUM; SELENIUM; SULFUR; and ... Chalcogens Preferred Term Term UI T053841. Date01/01/1999. LexicalTag NON. ThesaurusID NLM (1994). ... Chalcogens. Tree Number(s). D01.268.185. Unique ID. D018011. RDF Unique Identifier. http://id.nlm.nih.gov/mesh/D018011 ...
Dinitrogen Pentoxide Formula - Structure, Properties, Uses, Sample Questions - GeeksforGeeks
Spin-Dependent Vibronic Response of Carbon Radical Ions in 2D Tungsten Disulfide
"Experimental and Theoretical Studies of Dimers Stabilized by Two Chalc" by Mariusz Michalczyk, Magdalena Malik et al.
All together, these three bonds compose a total interaction energy between 5.4 and 16.8 kcal/mol, with the larger chalcogen ... of the Se atoms by S and Te analogues allows analysis of the dependence of these forces on the nature of the chalcogen atom. ... The binding motif involves a pair of Se···N chalcogen bonds, with a supplementary N···N pnicogen bond. Quantum calculations ... Experimental and Theoretical Studies of Dimers Stabilized by Two Chalcogen Bonds in the Presence of a N···N Pnicogen Bond. The ...
21.3: The Elements of Group 15 (The Pnicogens) - Chemistry LibreTexts
All three elements have a high affinity for the chalcogens and are usually found as the sulfide ores (M2S3), often in ... elemental nitrogen does not react with the halogens or the other chalcogens. Nonetheless, all the binary nitrogen halides (NX3 ... Chalcogens) : property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+,,c__DisplayClass228_0., ...
Chemistry
Quinolines (including Hydrogenated) Patents and Patent Applications (Class 546/152) - Justia Patents Search
The chalcogen is in an -OH, -SH, -OM or -SM group (M is Group IA or Group IIA light metal) (Class 546/179) ... Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding (Class 546/178) ... The -C(=X)- is part of a -C(=X)X- group, wherein the Xs are the same or diverse chalcogens (Class 546/170) ... Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding (Class 546/177) ...
Characterization of ZnE (E=S,Se, or Te) materials synthesized ...
Strong Coupled Magnetic and Electric Ordering in Monolayer of Metal Thio(seleno)phosphates
Recent advances in defect-engineered transition metal dichalcogenides for enhanced electrocatalytic hydrogen evolution:...
Defects2
- The research team created carbon impurity defects at chalcogen sites using scanning tunneling microscopy (STM)-induced hydrogen desorption from carbon-hydrogen complexes in WS 2 and WSe 2 , generating a carbon radical ion in WS 2 with a net magnetic moment of 1 µB. (lbl.gov)
- The roles of chalcogen atomic defects in engineering TMDs for improvements to the hydrogen evolution reaction (HER) are summarized. (ntu.edu.sg)
Interactions1
- All together, these three bonds compose a total interaction energy between 5.4 and 16.8 kcal/mol, with the larger chalcogen atom associated with the strongest interactions. (usu.edu)
Carbon2
- In this work, for the first time, nitrogen-doped highly microporous biomass-derived carbon (HMCs-3) was synthesized as a sulfur-loaded cathode for aqueous zinc-chalcogen batteries. (gdch.app)
- The excellent performance of this biomass-derived carbon holds great promise for practical applications in aqueous zinc-chalcogen batteries. (gdch.app)
Nature1
- Replacement of the Se atoms by S and Te analogues allows analysis of the dependence of these forces on the nature of the chalcogen atom. (usu.edu)
Bond1
- The binding motif involves a pair of Se···N chalcogen bonds, with a supplementary N···N pnicogen bond. (usu.edu)