Category: 119-91-5

Related Products of 119-91-5, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 119-91-5, Name is 2,2′-Biquinoline, SMILES is C1(C2=NC3=CC=CC=C3C=C2)=NC4=CC=CC=C4C=C1, belongs to catalyst-ligand compound. In a article, author is Ji, Jungyeon, introduce new discover of the category.

The effects of cobalt phthalocyanine and polyacrylic acid on the reactivity of hydrogen peroxide oxidation reaction and the performance of hydrogen peroxide fuel cell

A catalyst capable of high performance and good durability is developed for use in anode of flow-type membraneless hydrogen peroxide fuel cells (HPFCs). For that, cobalt phthalocyanine (CoPc) is immobilized onto reduced graphene oxide (rGO) linked to polyacrylic acid (PAA) surface modifier (rGO/PAA/CoPc). CoPc moiety containing PAA is tightly immobilized due to physical entrapment, axial ligand and stabilization of intermediates. According to evaluations, the amount of CoPc immobilized in rGO/PAA/CoPc is twice than that in rGO/CoPc because rGO and CoPc are weakly connected by 7C -7C conjugation without PAA acting as axial ligand to form coordinate bond with Co core within CoPc. In rGO/PAA/CoPc, current density for hydrogen peroxide oxidation reaction (HPOR) is 2.7 times higher than that measured in rGO/CoPc due to axial ligand role of PAA activating two HPOR pathways, wheras rGO/CoPc is only linked to one HPOR pathway. Even in stability test, rGO/PAA/CoPc preserves 90.0% of its initial HPOR current density, while that of Ni bulk is decreased by 30.6%. When performance of HPFC using rGO/PAA/CoPc is measured with a low concentration of H2O2 (0.1 mol L-1) of under physiological condition, its maximum power density (72.1 +/- 2.68 mu Wcm(2)) is better than that of HPFC using rGO/CoPc (38.3 +/- 0.20 mu Wcm(2)).

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Application In Synthesis of 2,2′-Biquinoline, 119-91-5, Name is 2,2′-Biquinoline, molecular formula is C18H12N2, belongs to catalyst-ligand compound. In a document, author is Vidyavathi, G. T., introduce the new discover.

Cashew nutshell liquid catalyzed green chemistry approach for synthesis of a Schiff base and its divalent metal complexes: molecular docking and DNA reactivity

Cashew Nut Shell Liquid (CNSL) anacardic acid was used, for the first time, as a green and natural effective catalyst for the synthesis of a quinoline based amino acid Schiff base ligand from the condensation of 2-hydroxyquinoline-3-carbaldehyde with l-tryptophan via solvent-free simple physical grinding technique. The use of the nontoxic CNSL natural catalyst has many benefits over toxic reagents and the desired product was obtained in high yield in a short reaction time. The procedure employed is simple and does not involve column chromatography. Moreover, a series of metal(II) complexes (metal = iron(II), cobalt(II), nickel(II), and copper(II)) supported by the synthesized new quinoline based amino acid Schiff base ligand (L) has been designed and the compositions of the metal(II) complexes were examined by various analytical techniques. The findings imply that the 2-hydroxyquinoline-3-carbaldehyde amino acid Schiff base (L) serves as a dibasic tridentate ONO ligand and synchronizes with the metal(II) in octahedral geometry in accordance with the general formula [M(LH)(2)]. Molecular docking study of the metal(II) complexes with B-DNA dodecamer has revealed good binding energy. The conductivity parameters in DMSO suggest the existence of nonelectrolyte species. The interaction of these metal complexes with CT-DNA has shown strong binding via an intercalative mode with a different pattern of DNA binding, while UV-visible photo-induced molecular cleavage analysis against plasmid DNA using agarose gel electrophoresis has revealed that the metal complexes exhibit photo induced nuclease activity.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Safety of 2,2′-Biquinoline, 119-91-5, Name is 2,2′-Biquinoline, molecular formula is C18H12N2, belongs to catalyst-ligand compound. In a document, author is Ward, James P., introduce the new discover.

Tungsten Ligand-Based Sulfur-Atom-Transfer Catalysts: Synthesis, Characterization, Sustained Anaerobic Catalysis, and Mode of Aerial Deactivation

The synthesis, properties, X-ray structures, and catalytic sulfur-atom-transfer (SAT) reactions of W-2(mu-S)(mu-S-2)(dtc)(2)(dped)(2) [1; dtc = S2CNR2-, where R = Me, Et, iBu, and Bn; dped = S2C2Ph22-] and W-2(mu-S)(2)(dtc)(2)(dped)(2) (2) are reported. These complexes represent the oxidized (1) and reduced (2) forms of anaerobic SAT catalysts operating through the bidirectional, ligand-based half-reaction (mu-S)(mu-S-2) <-> (mu-S)(2) + S-0. The catalysts are deactivated in air through the formation of catalytically inactive oxo complexes, (dtc)WO(mu-S)(mu-dped)W(dtc)(dped) (3), prompting us to recommend that group 6 SAT activity be assessed under strictly anaerobic conditions.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 119-91-5. Safety of 2,2′-Biquinoline.

Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 119-91-5, Name is 2,2′-Biquinoline, SMILES is C1(C2=NC3=CC=CC=C3C=C2)=NC4=CC=CC=C4C=C1, in an article , author is Yasukawa, Tomohiro, once mentioned of 119-91-5, Product Details of 119-91-5.

Chiral Rhodium Nanoparticle-Catalyzed Asymmetric Arylation Reactions

The development of heterogeneous catalyst systems for enantioselective reactions is an important subject in modern chemistry as they can be easily separated from products and potentially reused; this is particularly favorable in achieving a more sustainable society. Whereas numerous homogeneous chiral small molecule catalysts have been developed to date, there are only limited examples of heterogeneous ones that maintain high activity and have a long lifetime. On the other hand, metal nanoparticle catalysts have attracted much attention in organic chemistry due to their robustness and ease of deposition on solid supports. Given these advantages, metal nanoparticles modified with chiral ligands, defined as chiral metal nanoparticles, would work efficiently in asymmetric catalysis. Although asymmetric hydrogenation catalyzed by chiral metal nanoparticles was pioneered in the late twentieth century, the application of chiral metal nanoparticle catalysis for asymmetric C-C bond-forming reactions that give a high level of enantioselectivity with wide substrate scope was very limited. This Account summarizes recent investigations that we have carried out in the field of chiral rhodium (Rh) nanoparticle catalysis for asymmetric arylation reactions. We initially utilized composites of polystyrene-based copolymers with cross-linking moieties and carbon black incarcerated Rh nanoparticle catalysts for the asymmetric 1,4-addition of arylboronic acids to enones. We found that chiral diene-modified heterogeneous Rh nanoparticles were effective in these reactions, with excellent enantioselectivities and without causing metal leaching, and that bimetallic Rh/Ag nanoparticle catalysts enhanced activity. The catalyst could be easily recovered and reused more than ten times, thus demonstrating the robustness of metal nanoparticle catalysts. We then developed a secondary amide-substituted chiral diene modifier designed as a bifunctional ligand that possesses a metal biding site and a NH group to activate a substrate through hydrogen bonding. This chiral diene was very effective for the Rh/Ag nanoparticle-catalyzed asymmetric arylation of various electron-deficient olefins, including enones, unsaturated esters, unsaturated amides and nitroolefins, and imines to afford the corresponding products in excellent yields and with outstanding enantioselectivities. The system was also applicable for the synthesis of intermediates of various useful compounds. Furthermore, the compatibility of chiral Rh nanoparticles with other catalysts was confirmed, enabling the development of tandem reaction systems and cooperative catalyst systems. The nature of the active species was investigated. Several characteristic features of the heterogeneous nanoparticle systems that were completely different from those of the corresponding homogeneous metal complex systems were found.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 119-91-5, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 119-91-5, Name is 2,2′-Biquinoline, SMILES is C1(C2=NC3=CC=CC=C3C=C2)=NC4=CC=CC=C4C=C1, belongs to catalyst-ligand compound. In a article, author is Hu, Jenny, introduce new discover of the category.

Temperature and Solvent Effects on H-2 Splitting and Hydricity: Ramifications on CO2 Hydrogenation by a Rhenium Pincer Catalyst

The catalytic hydrogenation of carbon dioxide holds immense promise for applications in sustainable fuel synthesis and hydrogen storage. Mechanistic studies that connect thermodynamic parameters with the kinetics of catalysis can provide new understanding and guide predictive design of improved catalysts. Reported here are thermochemical and kinetic analyses of a new pincer-ligated rhenium complex ((POCOP)-P-tBu)Re(CO)(2) ((POCOP)-P-tB-P-u = 2,6-bis(di-tert-butylphosphinito)phenyl) that catalyzes CO2 hydrogenation to formate with faster rates at lower temperatures. Because the catalyst follows the prototypical outer sphere hydrogenation mechanism, comprehensive studies of temperature and solvent effects on the H-2 splitting and hydride transfer steps are expected to be relevant to many other catalysts. Strikingly large entropy associated with cleavage of H-2 results in a strong temperature dependence on the concentration of [((POCOP)-P-tB-P-u)Re(CO)(2)H](-) present during catalysis, which is further impacted by changing the solvent from toluene to tetrahydrofuran to acetonitrile. New methods for determining the hydricity of metal hydrides and formate at temperatures other than 298 K are developed, providing insight into how temperature can influence the favorability of hydride transfer during catalysis. These thermochemical insights guided the selection of conditions for CO2 hydrogenation to formate with high activity (up to 364 h(-1) at 1 atm or 3330 h(-1)( )at 20 atm of 1:1 H-2:CO2). In cases where hydride transfer is the highest individual kinetic barrier, entropic contributions to outer sphere H-2 splitting lead to a unique temperature dependence: catalytic activity increases as temperature decreases in tetrahydrofuran (200-fold increase upon cooling from 50 to 0 degrees C) and toluene (4-fold increase upon cooling from 100 to 50 degrees C). Ramifications on catalyst structure-function relationships are discussed, including comparisons between outer sphere mechanisms and metal-ligand cooperation mechanisms.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 119-91-5, Name is 2,2′-Biquinoline, molecular formula is C18H12N2, belongs to catalyst-ligand compound, is a common compound. In a patnet, author is Furfari, Samantha K., once mentioned the new application about 119-91-5, SDS of cas: 119-91-5.

Selectivity of Rh center dot center dot center dot H-C Binding in a sigma-Alkane Complex Controlled by the Secondary Microenvironment in the Solid State

Single-crystal to single-crystal solid-state molecular organometallic (SMOM) techniques are used for the synthesis and structural characterization of the sigma-alkane complex [Rh(tBu(2)PCH(2)CH(2)CH(2)PtBu(2))(eta(2),eta(2)-C7H12)][BAr4F] (Ar-F=3,5-(CF3)(2)C6H3), in which the alkane (norbornane) binds through two exo-C-H…Rh interactions. In contrast, the bis-cyclohexyl phosphine analogue shows endo-alkane binding. A comparison of the two systems, supported by periodic DFT calculations, NCI plots and Hirshfeld surface analyses, traces this different regioselectivity to subtle changes in the local microenvironment surrounding the alkane ligand. A tertiary periodic structure supporting a secondary microenvironment that controls binding at the metal site has parallels with enzymes. The new sigma-alkane complex is also a catalyst for solid/gas 1-butene isomerization, and catalyst resting states are identified for this.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 119-91-5, Name is 2,2′-Biquinoline, molecular formula is C18H12N2. In an article, author is Oberling, Marvin,once mentioned of 119-91-5, Formula: C18H12N2.

Cationic Ru-Se Complexes for Cooperative Si-H Bond Activation

The preparation and structural characterization of mononuclear tethered ruthenium(II) complexes of type [(DmpSe)Ru(PR3)]+BArF4 (DmpSe = 2,6-dimesitylphenyl selenolate, ArF = 3,5-bis(trifluoromethyl)phenyl) are described. Unlike relevant known selenolate complexes, the reported family of complexes is cationic with a single monodentate selenolate ligand. The ability of these complexes to engage in cooperative SiH bond activation at the RuSe bond is investigated, and a hydrosilane adduct has been fully characterized by multinuclear NMR spectroscopy and X-ray diffraction. The usefulness of these complexes as catalysts for various ionic dehydrogenative silylation and hydrosilylation reactions is assessed. At all stages, the new complexes are compared with their thiolate homologues [(DmpS)Ru(PR3)]+BArF4 (DmpS = 2,6-dimesitylphenyl thiolate). The differences between the selenolate and thiolate complexes are marginal, but measurable. The larger selenium atom provides more space around the RuSe bond than sulfur does for the RuS bond, and hence, the selenolate complexes can accommodate sterically more demanding hydrosilanes.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

Electric Literature of 119-91-5, Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. The appropriate choice of redox mediator can avoid electrode passivation and overpotential. 119-91-5, Name is 2,2′-Biquinoline, SMILES is C1(C2=NC3=CC=CC=C3C=C2)=NC4=CC=CC=C4C=C1, belongs to catalyst-ligand compound. In a article, author is Jana, Sripati, introduce new discover of the category.

Multi C-H Functionalization Reactions of Carbazole Heterocycles via Gold-Catalyzed Carbene Transfer Reactions

Herein we describe a multiple C-H functionalization reaction of carbazole heterocycles with diazoalkanes. We show that gold catalysts play a distinct role in enabling a multiple C-H functionalization reaction to introduce up to six carbene fragments onto molecules containing multiple carbazole units or to link multiple carbazole units into a single molecule. A one-pot stepwise approach enables the introduction of two different carbene fragments to allow orthogonal deprotection and straightforward derivatization.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

In an article, author is An, Yanyan, once mentioned the application of 119-91-5, HPLC of Formula: C18H12N2, Name is 2,2′-Biquinoline, molecular formula is C18H12N2, molecular weight is 256.3013, MDL number is MFCD00006740, category is catalyst-ligand. Now introduce a scientific discovery about this category.

Hollow structured copper-loaded self-floating catalyst in sulfite-induced oxidation of arsenic(III) at neutral pH: Kinetics and mechanisms investigation

In heterogeneous reactions, efficient solid-liquid separation of catalyst from water after oxidation is a significant approach to reduce possible secondary pollution of aquatic environments. In this work, a hollow-structured self-floating copper-loaded catalyst (HSM-N-Cu) was fabricated using copper ammonia complexes and hollow glass microsphere as the copper source and supporter, respectively. The SEM, TEM, BET, XPS, and XRD characterization results suggested ideal specific surface area and stability of HSM-N-Cu. The prepared HSM-N-Cu in conjunction with sulfite have been successfully applied for As(III) oxidation in near-neutral conditions. In general, HSM-N-Cu effectively activating S(IV) process involved Cu(II)/Cu(I) conversion and chain reactions of oxysulfur radicals, where the S(IV) acted as a complexing ligand to Cu(II) surface and precursor of oxysulfur radicals. SO4 center dot- was verified as the dominant contributor to As(III) oxidation, the apparent reaction rate constant (k(obs)) for SO4 center dot- generation was 1.81 +/- 0.12 M-1 s(-1), and the reaction rate constant (k(12)) of SO5 center dot- + As(III) -> As (IV) + SO52- was first calculated as 2.6 x 10(6) M-1 s(-1) by kinetic study. The apparent activation energy (E-a) was 48.6 +/- 0.1 kJ mol(-1) at 100 mg L-1 HSM-N-Cu. Additionally, self-floating HSM-N-Cu could be easily separated, and its great stability was proven after six-cycle test. Furthermore, the HSM-N-Cu/S(IV) system can work effectively in broad range of geochemical conditions. In summary, the established process is feasible for remediation of As(III)-contaminated water, the collection of self-floating catalysts by surface separation from water provides a new idea to reduce secondary pollution of water by catalysts.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 119-91-5, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 119-91-5, Name is 2,2′-Biquinoline, SMILES is C1(C2=NC3=CC=CC=C3C=C2)=NC4=CC=CC=C4C=C1, belongs to catalyst-ligand compound. In a article, author is Zhao, Si-Si, introduce new discover of the category.

A Stable Polyoxometalate-Based Metal-Organic Framework with Active CoMoO4 Layers for Electroreduction and Visible-Light-Driven Water Oxidation

Polyoxometalate-based MOFs afford a great opportunity in terms of water oxidation. Herein, a new PMOF (SYNU-1) has been constructed with active CoMoO4 layers and TPPE ligands. In SYNU-1, each TPPE ligand bridges eight Co(II) and Mo(VI) cations to give a 3D (3,4,5)-connected (6(2).8(3).10)(6(3))(6(5).8(5)) framework. SYNU-1 CPE exhibits electroreduction toward nitrite and bromate. Furthermore, SYNU-1 catalyst demonstrates electrocatalytic OER activity with a low overpotential of 364 mV. Strikingly, the heterogeneous catalyst SYNU-1 shows a high O-2 yield (79.05%) for visible light water oxidation with good stability and reusability.

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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI