Tag: M.W:200-300

Quality Control of Ruthenium(III) chloride xhydrate. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values.

Here, in an effort to prepare Ru-based metal organic frameworks, the authors developed a one-step solvothermal synthesis for Ru nanoassembly catalysts, which consist of ∼4 nm Ru nanoparticles well dispersed on amorphous carbon (Ru/C). The Ru/C catalyst obtained from a mixed solvent of H2O and CH3CH2OH (Ru/C-H2O/CH3CH2OH), featured a chain-like porous structure, provides Pt-like catalytic properties with low overpotentials at -10 mA cm-2 for the hydrogen evolution reaction (HER) within a wide range of pH values, i.e., 35 mV in 0.5 M H2SO4, 53 mV in 1.0 M KOH, and 93 mV in 3.5 wt% NaCl. Ru/C is also an efficient hydrogen oxidation reaction (HOR) catalyst at all pH values. In the alk. media, Ru/C-H2O/CH3CH2OH achieves a mass activity of 41.1 mA mg-1 at an overpotential of 50 mV and a high exchange c.d. (0.65 mA cm-2). The work provides a facile strategy to synthesize highly active Ru/C catalysts for bifunctional HER and HOR electrocatalysis.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

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: 1207176-24-6, is researched, Molecular C11H19BrFNO2, about Synthesis of aminomethylated 4-fluoropiperidines and 3-fluoropyrrolidines, the main research direction is aminomethylated fluoropiperidine fluoropyrrolidine preparation; exomethylenepyrrolidine bromosuccinamide hydrogenfluoride bromofluorination; sodium azide nucleophilic displacement reduction.Electric Literature of C11H19BrFNO2.

A short and efficient synthesis of 4-aminomethyl-4-fluoropiperidines, e.g., I and 3-aminomethyl-3-fluoropyrrolidines, e.g., II is described. These fluorinated azaheterocycles are of specific interest as bifunctional building blocks for fluorinated pharmaceutical compounds The key step of the synthetic pathway involves the regioselective bromofluorination of N-Boc-4-methylenepiperidine and 3-methylenepyrrolidine using Et3N.3HF and NBS.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques called Study of Supported Metal Catalysts by the Methods of the Small-Angle Scattering of Neutrons and X-rays, Author is Larichev, Yu. V.; Ivankov, O. I., which mentions a compound: 14898-67-0, SMILESS is Cl[Ru](Cl)Cl.[H]O[H], Molecular Cl3H2ORu, HPLC of Formula: 14898-67-0.

The possibility of analyzing deposited metal catalysts by small-angle neutron scattering through contrast variation based on the use of H2O/D2O mixtures is shown. The use of the contrasting technique makes it possible to selectively obtain the size distribution of metal particles in a wide range of sizes. The reliability of the obtained size distributions of metal particles is confirmed by the addnl. data of transmission electron microscopy and X-ray diffractometry. Variation in the contrast in small-angle neutron scattering with the use of deuterated liquids is shown to have greater possibilities with respect to the structural anal. of deposited catalysts in comparison with small-angle X-ray scattering.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Lin, Feng; Ma, Yulong; Sun, Yonggang; Zhao, Kanghe; Gao, Tingting; Zhu, Yingbo published the article 《Heterogeneous Ni-Ru/H-ZSM-5 one-pot catalytic conversion of lignin into monophenols》. Keywords: HZSM zeolite lignin monophenol catalytic conversion.They researched the compound: Ruthenium(III) chloride xhydrate( cas:14898-67-0 ).Name: Ruthenium(III) chloride xhydrate. 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:14898-67-0) here.

Due to the inertness and structural complexity of lignin, upgrading lignin to biofuels and fine chems. still faces great challenges. In this paper, a one-pot method was used to catalyze straw lignin with H-ZSM-5 supported by Ni and Ru bimetals, and the lignin conversion rate reached 88.1%. The yield of monophenol was 19.5%, of which the yield of 4-ethylphenol and 4-ethylguaiacol was 4.9% and 3.8%, resp. The 2D HSQC NMR anal. confirmed that the Ni-Ru/H-ZSM-5 catalyst had an obvious activity of breaking Cβ-O bonds before and after the reaction. The result showed that after loading metal Ni and Ru, the Lewis acid of the catalytic system was greatly increased, which caused electron transfer between Ni and Ru. 3Ni-1.5Ru/H-ZSM-5 had the strongest activity due to the largest synergy among Ni, Ru and H-ZSM-5. The synergy was the key factor leading to the cleavage of C-C and C-O bonds in straw lignin and the high-performance catalytic degradation of lignin. Besides, the effect of reaction solvent and hydrogen resource on upgrading lignin to fine chems. over 3Ni-1.5Ru/HZSM-5 catalyst was also intensively investigated. This research developed a method for the direct conversion of lignin into valuable monophenols.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Application of 14898-67-0. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Photo-degradation of salicylic acid over ruthenium oxide incorporated titania bifunctional photo-catalyst: An approach for direct cleavage of Caro-O bond via hydro-deoxygenation. Author is Wu, Wen-Chia; Yang, Chung-Sung; Chang, Chi-Chia.

Ruthenium oxide incorporated titania (RIT) photocatalyst, with verified ruthenium oxide ratio, have been prepared for photo-degradation In monitoring the photo-catalytic reaction of salicylic acid over RIT, two degradation steps are observed The first one is the de-carboxylation. The other step is the hydro-deoxygenation. The final product collected from the degradation is benzene. On the basis of exptl. results, the photo-induced e-h pair from the crystalline domain of titania in RIT plays the key role in inducing the de-carboxylation degradation As for the hydro-deoxygenation reaction, the Ru0/ Ru4+ ratio of incorporated ruthenium oxide in RIT is the pivitol factor in the direct cleavage of Caro–O bond of phenol. The best selectivity for Caro–O bond cleavage (71.9%) is shown in the RIT-1, Ru/Ti = 3.53%, route. If the ratio of Ru/Ti reaches to 10.81% (RIT-3), the selectivity decreases to 4.8%.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

HPLC of Formula: 14898-67-0. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Controlling the direction of intercomponent energy transfer by appropriate placement of metals in long-lived trinuclear complexes of Fe(II), Ru(II), and Os(II). Author is Paul, Animesh; Ganguly, Tanusree; Bar, Manoranjan; Baitalik, Sujoy.

In this work, we report the synthesis, photophysics, and electrochem. of a new array of trinuclear complexes, [(bpy)2Os(d-HIm-t)M(t-HIm-d)Os(bpy)2]6+ (M = FeII, RuII, and OsII), based on a previously reported bipyridine-terpyridine type bridge (d-HIm-t). Photophys. behavior of in situ generated trinuclear OsZnOs complex {[(bpy)2Os(d-HIm-t)Zn(t-HIm-d)Os(bpy)2]6+} was also investigated to understand the complicated photophysics of trinuclear array. Complexes display very rich redox properties demonstrating multiple metal-based oxidation and ligand-based reduction couples. The triads exhibit strong absorption throughout the entire UV-vis spectral region and also emit in the near-IR domain (NIR) with a sufficiently long lifetime at ambient temperature Intercomponent energy transfer, either from the periphery to the center or from the center to the periphery, depending upon the relative position of metals, was convincingly demonstrated through steady-state emission and lifetime measurements of the triads together with resp. model complexes. Interestingly, Fe2+ does not worsen the emission behavior of the OsFeOs system to a great extent. Present trinuclear complexes act as a visible light absorbing antenna by funneling the absorbed light to the subunit(s) with the lowest energy excited state. An array of trinuclear complexes of the type OsMOs (M = FeII, RuII, and OsII) is designed in this work where the direction of the photoinduced intercomponent energy transfer is switched between the periphery to the center or from the center to the periphery by appropriate placement of the metals. Importantly, Fe2+ does not adversely deteriorate RT luminescence characteristics of OsFeOs triad and yields a long-lived excited state which makes the complex useful as an effective visible light photosensitizer.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Quality Control of Ruthenium(III) chloride xhydrate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Transition metal doped cobalt ferrite nanoparticles and efficient photocatalyst for photodegradation of textile dye. Author is Singh, Sneha; Singhal, Sonal.

Spinel ferrite magnetic nanoparticles grab greater attention due to their characteristic properties such as catalytic, optical, magnetic and elec. properties. Moreover, the substitution of transition metals in ferrites is promising to manipulate phys. characterstics and could enhance their catalytic and magnetic properties. Ruthenium based catalyst have gained much importance by several researchers due to their high activity. In this study, a series of Ru doped cobalt ferrite nanoparticles (CoRuxFe2-xO4; x = 0.0, 0.02, 0.06) were synthesized via Sol-gel method. The effect of ruthenium substitution on the crystal structure of cobalt ferrite was examined Crystal structures of nanoparticles were studied using X-ray diffraction pattern. Vibrating sample magnetometer shows the ferromagnetic property of the ferrite nanostructures. The photocatalytic properties of the prepared cobalt ferrite nanoparticles were investigated to determine their visible light induced degradation of a textile dye. The photocatalytic result shows that cobalt ferrite when doped with ruthenium exhibits excellent photocatalytic activity. Moreover, CoRuxFe2-xO4 photocatalyst are highly magnetic in nature, thus facilitates separation and repetitive reuse of photocatalyst.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

SDS of cas: 14898-67-0. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Palladium nanoparticles supported on aluminum oxide (Al2O3) for the catalytic hexavalent chromium reduction. Author is Gozeten, Ibrahim; Tunc, Mehmet.

While Cr(VI), a hazardous industrial waste, is an acute toxic, carcinogenic, and proven mutagenic pollutant, Cr(III) is thought to be an essential element for living things. In this study, Pd(0)@Al2O3nanoclusters supported on Al2O3 were reproducibly prepared in aqueous solution at 25°C by a simple impregnation-reduction method. The results showed that Pd(0)@Al2O3 nanoclusters with average particle size of 3.01 ± 0.19 nm were formed, well dispersed over the Al2O3 surface. The Al2O3-supported Pd(0)@Al2O3 nanoclusters were used as heterogeneous nanocatalysts in the catalytic reduction of Cr(VI) in formic acid medium, which is a good reducing agent under mild conditions. It has been observed that catalyst Pd(0)@Al2O3 can catalyze the catalytic reduction of Cr(VI) with high selectivity (∼ %99) and efficiency (TOF) (138 mol Cr2O72-/mol Pd min.). More importantly, the exceptional stability of the Pd(0)@Al2O3 nanocatalyst against flocculation, leaching, and CO poisoning showed that this catalyst is a reusable catalytic material in the catalytic reduction reaction of Cr(VI). It was observed that the Pd(0)@Al2O3catalyst maintained a significant (> 84%) initial TOF value even after the 5th use. The Pd(0)@Al2O3nanocatalyst was identified by advanced anal. methods (XPS, XRD, TEM, TEM-EDX, HR-TEM, ICP-OES). In addition, for the kinetic data of the catalytic reduction reaction of Cr(VI) catalyzed by Pd(0)@Al2O3, the rate equation and Ea, ΔH#, and ΔS# activation parameters were derived depending on the [catalyst], [Cr2O72-], [HCOOH], and [HCOONa] concentrations and temperature

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

SDS of cas: 14898-67-0. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Boosting Electrocatalytic Hydrogen Evolution of Nickel foam Supported Nickel Hydroxide by Ruthenium Doping. Author is Krishna Sadhanala, Hari; Perelshtein, Ilana; Gedanken, Aharon.

Hydrogen evolution reaction (HER) in acid electrolytes has advantages for electrolysis of water due to large supply of hydrogen ions. Herein, we report the synthesis of ruthenium doped nickel hydroxide on com. nickel foam (Ru-Ni(OH)2/NF) by using simple hydrothermal method. Due to integrated assembly and porous structure, as prepared Ru-Ni(OH)2/NF is explored as an electrocatalyst for HER in 0.5 M H2SO4 solution at room temperature The Ru-Ni(OH)2/NF showed excellent electrocatalytic HER activity with Tafel slope of 94 mV/dec. The overpotential of Ru-Ni(OH)2/NF required to deliver 10 mAcm-2 c.d. was calculated to be 27 mV, which is smaller than that of com. Pt/C/NF catalyst (33 mV). Furthermore, the Ru-Ni(OH)2/NF has shown decent stability and notable durability. The enhanced HER activity of Ru-Ni(OH)2/NF is attributed to Ru doping Ni(OH)2/NF and effective contacts between the Ru-Ni(OH)2 and NF substrate. Finally, these results may provide guidance to the design of Pt-free catalysts for effective energy related electrocatalytic applications.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Related Products of 14898-67-0. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Ruthenium(III) chloride xhydrate, is researched, Molecular Cl3H2ORu, CAS is 14898-67-0, about Efficient light activation of a [Ru(bpy)(tpy)Cl]+ catalyst by a porphyrin photosensitizer at small driving force. Author is Charalambidis, Georgios; Charisiadis, Asterios; Margiola, Sofia; Coutsolelos, Athanassios; Aukauloo, Ally; Leibl, Winfried; Quaranta, Annamaria.

Light activation of dyads containing porphyrins and a catalytic ruthenium complex having a high oxidation potential (∼1 V vs SCE) is investigated by time-resolved spectroscopy. It is shown that activation of the ruthenium complex occurs through oxidative quenching of the chromophore in the presence of a reversible electron acceptor. Despite the lack of driving force for intramol. electron transfer, an efficient intramol. oxidation of the catalyst is observed, suggesting that porphyrins are attractive chromophores to activate oxidation catalysts throughout the visible spectrum.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”