Tag: M.W:200-300

Sasaki, Tomoya; Izumi, Reiko; Tsuda, Tetsuya; Kuwabata, Susumu published an article about the compound: Silver(I) trifluoromethanesulfonate( cas:2923-28-6,SMILESS:O=S(C(F)(F)F)([O-])=O.[Ag+] ).Related Products of 2923-28-6. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:2923-28-6) through the article.

Due to their high conductivity and high physicochem. stability, carbon nanotubes (CNTs) have received a great deal of attention as a promising support material for Pt-based electrode catalysts for redox reactions (ORRs). However, to immobilize Pt nanoparticles (Pt NPs) on their inert surfaces, several CNT pretreatments, including the chem. generation of functional groups and polymer modifications, have been attempted. In this study, we propose a straightforward preparation method for Pt NPs supported on single- and multi-walled carbon nanotubes (SWCNTs and MWCNTs) at room temperature The preparation method includes only two steps: the magnetron sputtering of Pt onto diethylmethylammonium-based protic ionic liquid (IL) and the mixing of the resultant Pt NP-dispersed protic IL with pristine CNTs. Zeta potential measurements reveal that the spontaneous immobilization of the Pt NPs on the CNT surface during the mixing is facilitated by electrostatic interactions between the Pt NPs neg. charged by anion adsorption and the CNTs pos. charged by cation adsorption. The mass activity for the ORR of the Pt NP-modified SWCNTs (Pt-SWCNTs) and MWCNTs (Pt-MWCNTs) prepared using diethylmethylammonium trifluoromethanesulfonate as a medium is approx. 2.5 times higher than that of a com. available electrocatalyst. This high performance is attributable to the small size (ca. 1.9 nm) of Pt NPs with a narrow size distribution and high dispersity on CNTs. In the case of Pt-SWCNTs, surprisingly, the ORR activity is slightly enhanced after 20,000 cycles of an accelerated degradation test because of an unexpected Pt NP shape change from spherical to nanorod-like along the grooves formed at the contacts of the CNTs in the SWCNT bundle. This shape variation and the improvement in catalytic activity will lead to the development of innovative strategies for maintaining electrocatalytic activity over a long period.

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Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Maldonado, Tamara; Flores, Erick; Llanos, Leonel; Aravena, Daniel; Vega, Andres; Godoy, Fernando; Aspee, Alexis; Arancibia-Miranda, Nicolas; Ferraudi, Guillermo; Gomez, Alejandra published the article 《Azo-hydrazone tautomerism in organometallic complexes triggered by a -Re(CO)3(L) core: A spectroscopic and theoretical study》. Keywords: azo hydrazone tautomerism rhenium carbonyl organometallic complex; phenyldiazenyl quinolinol rhenium tricarbonyl preparation crystal mol structure tautomerism.They researched the compound: Silver(I) trifluoromethanesulfonate( cas:2923-28-6 ).Computed Properties of CAgF3O3S. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:2923-28-6) here.

The spectroscopic properties and tautomeric behavior of five novel Rhenium(I) tricarbonyl complexes bearing an azo ligand are presented. The organic ligand is stable in solution as the hydrazone tautomer. It remains as hydrazone in different medium conditions (solvent, concentration, pH, etc.) without the formation of detectable amounts of the azo tautomer. However, the complexation of this ligand to the strong electron-withdrawing fragment -Re(CO)3X (X = Cl-, Br-) causes tautomerism to appear in the organic moiety. Two well-defined regions in the electronic spectra for both tautomers were observed, allowing the azo/enol-keto/hydrazone equilibrium to be followed. TD-DFT calculations indicate that for the keto/hydrazone form, the main absorption band is attributed to an IL transition. In contrast, the azo/enol species shows a major contribution of the 1MLCT (dπ(Re) → dπ*(NN)) transition. The tautomeric equilibrium is easily shifted using solvents with different dielec. constant and hydrogen bond donor/acceptor (HBD/HBA) abilities. Also, the tautomerization process is deeply influenced by the electronic properties of the axial ligand. Therefore, this behavior represents a different strategy for the design of novel materials with optical properties. Furthermore, tautomerism is affected by the concentration of complexes and the presence of water in solvents. The acid-base behavior of these compounds in a 50% volume/volume ethanol-buffer system showed that the azo/enol tautomer is stabilized in acidic media. At the same time, an increase of pH promotes tautomerization toward the keto/hydrazone, followed by forming the anionic form at pH > 8.

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Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Silver(I) trifluoromethanesulfonate(SMILESS: O=S(C(F)(F)F)([O-])=O.[Ag+],cas:2923-28-6) is researched.Electric Literature of C5H5FN2. The article 《A comparative study of [Ag11(iPrS)9(dppb)3]2+ and [Ag15S(sBuS)12(dppb)3]+: templating effect on structure and photoluminescence》 in relation to this compound, is published in Dalton Transactions. Let’s take a look at the latest research on this compound (cas:2923-28-6).

Atomically precise silver clusters with tunable photoluminescence (PL) properties have attracted extensive attention due to their great value for basic science and future applications. Here, we report that the addition of a sulfido template into a triangular thiolated silver cluster [Ag11(iPrS)9(dppb)3]·2CF3SO3·CH3OH (Ag11, dppb = 1,4-bis(diphenylphosphino)butane), which is emissive at 660 nm under ambient conditions, produced another silver cluster [S@Ag15(sBuS)12(dppb)3]·CF3SO3·H2O (Ag15) that displays 716 nm emission with a 56 nm red shift aided by the ligand sec-Bu mercaptan. The sulfido template, which affects the geometrical and electronic structures, results in a red shift of Ag11 room-temperature PL as a result of opening up the template-to-metal charge transfer (TMCT) and disturbing the electronic transition between the metal core and ligands at the periphery.

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Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Nazish, Mohd; Legendre, Christina M.; Sarkar, Samir Kumar; Luecken, Jana; Goffitzer, Daniel J.; Diefenbach, Martin; Schwederski, Brigitte; Herbst-Irmer, Regine; Stalke, Dietmar; Holthausen, Max C.; Kaim, Wolfgang; Roesky, Herbert W. published the article 《Selective Route to Stable Silicon-Boron Radicals and Their Corresponding Cations》. Keywords: stable silicon boron radical cation preparation crystal mol structure; mol structure calculation electrochem redox silicon boron radical cation.They researched the compound: Silver(I) trifluoromethanesulfonate( cas:2923-28-6 ).Formula: CAgF3O3S. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:2923-28-6) here.

Herein, authors report on a facile and selective one-pot synthetic route to silicon-boron radicals. Reduction of Br2BTip (Tip = 2,4,6-iPrC6H2) with KC8 in the presence of LSi-R affords LSi(tBu)-B(Br)Tip (1) and LSi(N(TMS)2)-B(Br)Tip (2) [L = PhC(NtBu)2]. These first examples of silicon-boron isolated radical species feature spin d. on the silicon and boron atoms. 1 And 2 exhibit extraordinary stability to high temperatures under inert conditions in solution and air stability in the solid state. Both radicals have been isolated and fully characterized by ESR spectroscopy, SQUID magnetometry, mass spectrometry, cyclic voltammetry, single-crystal x-ray structure anal., and d. functional theory calculations Moreover, compound 1 exhibits one-electron transfer when treated with 1 equivalent of AgSO3CF3 and [Ph3C]+[B(C6F5)4]-, resp., resulting in the corresponding cations [LSi(tBu)-B(Br)Tip]+[CF3SO3]- (3) and [LSi(tBu)-B(Br)Tip]+[B(C6F5)4]- (4). Compounds 3 and 4 have been characterized with multinuclear NMR and mass spectrometry.

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Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 1260795-42-3, is researched, SMILESS is O=C(C1C(C=O)=CC(Br)=CC=1)OC, Molecular C9H7BrO3Journal, Article, Chemistry – A European Journal called Indium-Catalyzed C-F Bond Transformation through Oxymetalation/β-Fluorine Elimination to Access Fluorinated Isocoumarins, Author is Yata, Tetsuji; Nishimoto, Yoshihiro; Chiba, Kouji; Yasuda, Makoto, the main research direction is difluorovinyl benzoate indium oxymetalation fluorine elimination catalyst; isocoumarin fluorinated preparation; C−F bond transformation; catalysis; fluorinated heterocycles; gem-difluoroalkene; indium.Synthetic Route of C9H7BrO3.

Fluorinated heterocycles have attracted much attention in the pharmaceutical and agrochem. industries. Many strategies have already been developed to achieve the synthesis of fluorinated heterocycles. Formidable challenges remain, however, in the synthesis of fluorinated isocoumarin derivatives that are among the most alluring structural motifs. Herein, the indium-catalyzed C-F bond transformation of 2-(2,2-difluorovinyl) benzoates is reported, which are readily accessible compounds, to give a diverse array of fluorinated isocoumarins, I (R 1 = H, 5-Me, 6-Me, 8-Cl, etc.; R2 = H, n-Bu). The present reaction proceeds smoothly using inexpensive reagents: a catalytic amount of indium salt in the presence of zinc salt. A theor. calculation of potential energy profiles showed that the reaction consists of oxymetalation with the elimination of alkyl halide and the β-fluorine elimination.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Silver(I) trifluoromethanesulfonate, is researched, Molecular CAgF3O3S, CAS is 2923-28-6, about Cu(II) and Ag(I) complexes of the pyrazole-derived diorganoselenide (pzCH2CH2)2Se. Synthesis, solid state structure and solution behavior.Electric Literature of CAgF3O3S.

The diorganoselenide (pzCH2CH2)2Se (R2Se (1), pz = pyrazole) was prepared by reacting the in situ obtained Na2Se with 1-(2-bromoethyl)-1H-pyrazole in a water/ethanol mixture Copper(II) and silver(I) complexes of type [CuX2{Se(CH2CH2pz)2}] [X = Cl (2), Br (3), NO3 (4), ClO4 (5)] and [AgX{Se(CH2CH2pz)2}] [X = OTf (6) (OTf = CF3SO3), NO3 (7), ClO4 (8)] were obtained by reacting the ligand 1 with the appropriate copper(II) and silver(I) salt in 1:1 molar ratio. The ligand and the metal complexes were investigated by appropriate spectroscopic methods, both in solution and in solid state: multinuclear NMR (1H, 13C, 19F, 77Se), UV-Vis spectroscopy, ESI mass spectrometry, IR spectroscopy and molar conductivity The metal complexes 2, 3 and 6-8 behave as 1:1 electrolytes in solution, while 4 and 5 behave as 1:2 electrolytes. The mol. structures of complexes [CuX2{Se(CH2CH2pz)2}] [X = Cl (2), Br (3), NO3 (4)], [Cu(ClO4)2{Se(CH2CH2pz)2}(H2O)] (5·H2O) and [AgOTf{Se(CH2CH2pz)2}] (6) were determined by single-crystal X-ray diffraction. The (pzCH2CH2)2Se ligand acts as a N,Se,N chelating moiety in 2, 3, 4 and 5·H2O and as a bridging, tetraconnective 2 x N,Se unit in 6.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Silver(I) trifluoromethanesulfonate, is researched, Molecular CAgF3O3S, CAS is 2923-28-6, about Catalytic hydrogenation enabled by ligand-based storage of hydrogen.Reference of Silver(I) trifluoromethanesulfonate.

Biol. employs exquisite control over proton, electron, H-atom, or H2 transfer. Similar control in synthetic systems has the potential to facilitate efficient and selective catalysis. Here we report a dihydrazonopyrrole Ni complex where an H2 equivalent can be stored on the ligand periphery without metal-based redox changes and can be leveraged for catalytic hydrogenations. Kinetic and computational anal. suggests ligand hydrogenation proceeds by H2 association followed by H-H scission. This complex is an unusual example where a synthetic system can mimic biol.′s ability to mediate H2 transfer via secondary coordination sphere-based processes.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

COA of Formula: CAgF3O3S. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Silver(I) trifluoromethanesulfonate, is researched, Molecular CAgF3O3S, CAS is 2923-28-6, about X-ray crystal structure of [L2Ag3]+[OTf].5C6D6: a monoanionic bisphosphinimine ligand supported trisilver complex. Author is Drescher, Sam L.; Forfar, Christopher P.; Boere, Rene T.; Hayes, Paul G..

The compound bis{μ3-2, 5-bis[N-(4-isopropylphenyl)-P, P-diphenylphosphorimidoyl]pyrrol-1-ido-Κ3N:N’:N’:’}trisilver(I) trifluoromethanesulfonate deuterated benzene pentasolvate, [Ag3(C46H44N3P2)2](CF3O3S)5C6D6, (I), was synthesized from two equivalent of NaL [L = 2,5-(4-iPrC6H4N=PPh2)C4H2N] and three equivalent of AgOTf (OTf = OSO2CF3). High-quality crystals of (I) formed with five deuterated benzene solvent mols. in the asym. unit. Notably, the bond lengths and angles between the three silver atoms are markedly different, unlike in most other reported trisilver complexes that tend to form three equivalent metal centers. Addnl., to the best of our knowledge, this is the first report of a trisilver complex with six nitrogen donors from two bisphosphinimine ligands.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 2923-28-6, is researched, Molecular CAgF3O3S, about Silver in the Center Enhances Room-Temperature Phosphorescence of a Platinum Sub-nanocluster by 18 Times, the main research direction is platinum silver octanethiolate subnanocluster aggregation induced ambient phosphorescence enhancement; metal clusters; nanoparticles; photoluminescence; platinum; silver.COA of Formula: CAgF3O3S.

There was controversy surrounding the roles of the metal core (metal-metal interaction) and the shell (metal-ligand interaction) in luminescence of ligand-protected metal nanoclusters. The authors aggregation-induced room-temperature phosphorescence of a Pt octanethiolate complex and its Ag ion inclusion complex (a Ag-doped Pt sub-nanocluster) was discovered. The inclusion of Ag ion boosted the photoluminescent quantum yield by 18 times. Photophys. measurements indicate that the rate of nonradiative decay was slower for the Ag-doped Pt sub-nanocluster. DFT calculations showed that the LUMO, which had the main contribution from Ag s-orbital and Pt d-orbitals, played a critical role in suppressing the structural distortion at the excited state. This work will hopefully stimulate more research on designing strategies based on MOs of atomicity-precise luminescent multimetallic nanoclusters.

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Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Silver(I) trifluoromethanesulfonate( cas:2923-28-6 ) is researched.Quality Control of Silver(I) trifluoromethanesulfonate.Waters, Jessica E.; Berger, Georg; Peel, Andrew J.; Garcia-Rodriguez, Raul; Bond, Andrew D.; Wright, Dominic S. published the article 《Uncovering the Hidden Landscape of Tris(4-pyridyl) Ligands: Topological Complexity Derived from the Bridgehead》 about this compound( cas:2923-28-6 ) in Chemistry – A European Journal. Keywords: preparation tin antimony bismuth trispyridyl ligand complex; crystal structure tin antimony bismuth trispyridyl ligand complex; structure directing tin antimony bismuth trispyridyl ligand complex; coordination networks; main-group synthesis; pnictogens; topology; tripodal ligands. Let’s learn more about this compound (cas:2923-28-6).

Supramol. main group chem. is a developing field which parallels the conventional domain of metallo-organic chem. Little explored building blocks in this area are main group metal-based ligands which have the appropriate donor symmetry to build desired mol. or extended arrangements. Tris(pyridyl) main group ligands (E(py)3, E = main group metal) are potentially highly versatile building blocks since shifting the N-donor arms from the 2- to the 3-positions and 4-positions provides a very simple way of changing the ligand character from mononuclear/chelating to multidentate/metal-bridging. Here, the coordination behavior of the first main group metal tris(4-pyridyl) ligands, E(4-py)3 (E = Sb, Bi, Ph-Sn) is explored, as well as their ability to build metal-organic frameworks (MOFs). The complicated topol. of these MOFs shows a marked influence on the counteranion and on the ability of the E(4-py)3 ligands to switch coordination mode, depending on the steric and donor character of the bridgehead. This structure-directing influence of the bridgehead provides a potential building strategy for future mol. and MOF design in this area.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem