Month: December 2022

Hu, Maowei published the artcileEfficient and Stable Dye-Sensitized Solar Cells Based on a Tetradentate Copper(II/I) Redox Mediator, Category: catalysis-chemistry, the publication is ACS Applied Materials & Interfaces (2018), 10(36), 30409-30416, database is CAplus and MEDLINE.

The identification of an efficient and stable redox mediator is of paramount importance for commercialization of dye-sensitized solar cells (DSCs). Herein, a new class is reported of copper complexes containing diamine-dipyridine tetradentate ligands (L1 = N,N’-dibenzyl-N,N’-bis(pyridin-2-ylmethyl)ethylenediamine; L2 = N,N’-dibenzyl-N,N’-bis(6-methylpyridin-2-ylmethyl)ethylenediamine) as redox mediators in DSCs. Devices constructed with [Cu(L2)]^2+/+ redox couple afford an impressive power conversion efficiency (PCE) of 9.2% measured under simulated one sun irradiation (100 mW cm^-2, AM 1.5G), which is among the top efficiencies reported thus far for DSCs with copper complex-based redox mediators. Remarkably, the excellent air, photo, and electrochem. stability of the [Cu(L2)]^2+/+ complexes renders an outstanding long-term stability of the whole DSC device, maintaining ?90% of the initial efficiency over 500 h under continuous full sun irradiation This work unfolds a new platform for developing highly efficient and stable redox mediators for large-scale application of DSCs.

ACS Applied Materials & Interfaces published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Chen, Wen-Ching published the artcileExpanding the ligand framework diversity of carbodicarbenes and direct detection of boron activation in the methylation of amines with CO₂, HPLC of Formula: 2909-77-5, the publication is Angewandte Chemie, International Edition (2015), 54(50), 15207-15212, database is CAplus and MEDLINE.

A simple and convergent synthetic strategy used to increase the diversity of the carbodicarbenes I (7a–f, R¹ = 2-pyridyl, ⁱPr, 2,6-ⁱPr₂C₆H₃; R² = Me, ⁱPr, 2,6-ⁱPr₂C₆H₃; R³ = Me, ⁱPr) ligand framework through incorporation of unsym. pendant groups is reported. The carbenes 7a–f catalyze 9-BBN-promoted reductive methylation of primary and secondary amines with carbon dioxide. Structural anal. and spectroscopic studies of ligands and their Rh complexes are reported. Reactivity studies reveal carbodicarbenes as competent organocatalysts for amine methylation using CO₂ as a synthon. A unique B-H-activated boron-carbodicarbene complex was isolated as a reaction intermediate, providing mechanistic insight into the CO₂ functionalization process.

Angewandte Chemie, International Edition published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, HPLC of Formula: 2909-77-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Tseng, Hsi-Ching published the artcile[¦Ç⁵-Cp*B-Mes]⁺: A Masked Potent Boron Lewis Acid, Safety of Bis(4-fluorophenyl)methane, the publication is Organometallics (2019), 38(22), 4516-4521, database is CAplus.

The chem. of the B cation was revitalized in the past decade due to its newfound application in stoichiometric and catalytic organic reactions. To extend the frontier of B cation catalysis, the authors came to discover that a mesityl-substituted ¦Ç⁵-Cp^*-coordinated B cation could serve as a powerful Lewis acid for organic catalytic transformations. The B cation [Cp^*B-Mes][B(C₆F₅)₄] ([1][B(C₆F₅)₄]) stabilized in a boronium-like electronic structure binds to Et₃PO readily and displays an acceptor number exceeding that of B(C₆F₅)₃ on the Gutmann-Beckett acidity scale. The steric and electronic stabilization exerted by the electron-donating Cp^* renders the highly Lewis acidic B cation an easy-to-handle catalyst for hydrodeoxygenation of aryl ketones at ambient temperature The exceptional catalytic performance of [1]⁺ implies that the incorporation of a coordinatively flexible substituent at B is critical in bringing catalytic activity and stability to B cation catalysts.

Organometallics published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C18H17N5O3, Safety of Bis(4-fluorophenyl)methane.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wang, Lihua published the artcileInclusion of guest materials in aqueous coordination network shells spontaneously generated by reacting 2,5-dimercapto-1,3,4-thiadiazole with nanoscale metallic silver, Recommanded Product: 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, the publication is RSC Advances (2014), 4(65), 34294-34302, database is CAplus.

Noble metal nanoparticles (NPs) are spontaneously enfolded by aqueous coordination networks generated by reacting 2,5-dimercapto-1,3,4-thiadiazole (DMcT) with Ag nanostructures in zero-oxidation state, and finally form novel hollow Au@Ag@infinite coordination polymers core-shell nanostructures (Au@Ag@void@ICPs). In this synthesis, DMcT mols. not only act as the bridging ligands but also directly oxidize Ag⁰ to Ag⁺ ions for the formation of amorphous DMcT-Ag ICPs. And, the sizes of the shell and void of Au@Ag@void@ICPs can be facilely tuned by modulating the amount of DMcT and the size ratio of Au@Ag NPs, resp. Due to the high structural tailorability of DMcT-Ag ICPs, multi-encapsulation of Au@Ag NPs with either small organic mols. or biol. macromols. (e.g., enzymes) can be achieved to fabricate multi-functional core-shell nanostructures. A case in point is that a highly sensitive biosensor of H₂O₂ with a wider detection window was constructed based on the prepared metal NPs-ICPs-enzyme composites and resonance Raman scattering. This study provides not only a new template for tailoring hollow core-shell nanomaterials but also a versatile platform for chem. (bio) sensing.

RSC Advances published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is 0, Recommanded Product: 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kolchina, E. F. published the artcileSynthesis and photoinitiating properties of N-substituted 2,6-diisopropylanilines, Formula: C14H23N, the publication is Russian Journal of Organic Chemistry (2011), 47(6), 855-861, database is CAplus.

Reactions of 2,6-diisopropylaniline and its 4-bromo and 4-thiocyanato derivatives with MeI in DMF in the presence of potassium carbonate gave exclusively the N,N-dimethyl-substituted products. Heating of 2,6-diisopropylaniline and 2,6-diisopropyl-4-thiocyanatoaniline with MeI without a solvent afforded only N-Me derivatives Diffraction efficiencies of the products were measured and they are effective co-initiators of photopolymerization

Russian Journal of Organic Chemistry published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, Formula: C14H23N.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hajjami, Maryam published the artcileSynthesis and Characterization of Magnetic Functionalized Ni and Cu Nano Catalysts and Their Application in Oxidation, Oxidative Coupling and Various Multi-Component Reactions, Computed Properties of 119-80-2, the publication is Catalysis Letters (2021), 151(8), 2420-2435, database is CAplus.

Two magnetic nano catalysts of nickel and copper, Fe₃O₄@SiO₂@DOP-BenPyr-M(II), (M=Ni and Cu) have been synthesized. These catalysts were applied as recoverable, efficient and new heterogeneous catalysts for the high yielding and room temperature one-pot procedure of selective oxidation of sulfides to sulfoxides and oxidative coupling of thiols to disulfides. In addition, the catalytic activity of Fe₃O₄@SiO₂@DOP-BenPyr-Ni(II) was investigated as heterogeneous nanocatalyst for synthesis of 2,3-dihydroquinazolin-4(1H)-ones, 5-substituted 1H-tetrazoles and polyhydroquinolines. The synthesized catalysts were characterized by FT-IR, TGA, XRD, VSM, EDX, ICP and SEM techniques. These catalysts were recovered by an external magnet and reused several times without significant loss of catalytic efficiency.

Catalysis Letters published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Computed Properties of 119-80-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Shyma Mary, Y. published the artcileComputational Study of Sorbic Acid Drug Adsorption onto Coronene/Fullerene/Fullerene-Like X12Y12 (X = Al, B and Y = N, P) Nanocages: DFT and Molecular Docking Investigations, Category: catalysis-chemistry, the publication is Journal of Cluster Science (2022), 33(4), 1809-1819, database is CAplus.

Adsorption of the sorbic acid drug onto the surface of coronene/fullerene/fullerene like nanocages was investigated by theor. calculations Our results showed that the sorbic acid drug connects the nanoclusters through oxygen and hydrogen atoms. Due to the adsorption of the sorbic acid drug, there are significant changes in chem. descriptors and nonlinear optical properties. Energy gap values of all nanocluster systems are reduced, resulting in enhance in the conductivity of systems except for fullerene. All complex¡äs UV visible wavenumber is blue-shifted and especially for coronene and fullerene complex, the values are very high. The enhancement for different functional group wavenumbers in the Raman spectrum indicates that it is possible to make a nanocage sensor for the detection of these compounds using surface-enhanced Raman scattering (SERS). Docking gives good values of at. contact energies and suitable for drug delivery.

Journal of Cluster Science published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C15H10O2, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Pegoli, Andrea published the artcileRadiolabeled Dibenzodiazepinone-Type Antagonists Give Evidence of Dualsteric Binding at the M₂ Muscarinic Acetylcholine Receptor, Application In Synthesis of 140-28-3, the publication is Journal of Medicinal Chemistry (2017), 60(8), 3314-3334, database is CAplus and MEDLINE.

The dualsteric ligand approach, aiming at ligands with improved subtype selectivity, has been increasingly applied to muscarinic receptors (MRs). In this article we present the synthesis and characterization of a M₂R subtype-preferring radiolabeled dibenzodiazepinone-type antagonist [³H]UNSW-MK259, (I) and its homodimeric analog [³H]UR-AP060, (II). Saturation binding studies at the M₂R, using the orthosteric antagonist atropine to determine unspecific binding, proved that the monomeric and the dimeric compound bind to the orthosteric binding site (apparent K_d: 0.87 and 0.24 nM, resp.). Various binding studies with I and II at the M₂R, for instance, saturation binding experiments in the presence of the allosteric MR modulators W84 or LY2119620 (Schild-like anal.) suggested a competitive mechanism between the allosteric modulator and the dibenzodiazepinone derivatives, and thus a dualsteric binding mode of both I and II. This was consistent with the results of M₂R MD simulations (¡Ý2 ¦Ìs) performed with I and II.

Journal of Medicinal Chemistry published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Application In Synthesis of 140-28-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Pankratov, Alexei N. published the artcileSemiempirical quantum chemical PM3 computations and evaluations of redox potentials, basicities, and dipole moments of the diphenylamine series as analytical reagents, SDS of cas: 1821-27-8, the publication is Canadian Journal of Chemistry (1999), 77(12), 2053-2058, database is CAplus.

By evaluating the obtained results of PM3 computations, the following correlations were found: (i) the diarylamines redox potentials (E) with the first ionization potentials (I); (ii) the pK_n values characterizing both the amines N protonation and the carboxy-substituted reagents dissociation via the COOH group, with the proton affinities of the corresponding diphenylamines and COO^–-containing anions; (iii) the exptl. values of the mols. dipole moments (¦Ì) with the theor. ones. The feasibility of simple semiempirical quantum-chem. evaluation of E, pK_a, and ¦Ì of the diphenylamine series as redox reagents was determined

Canadian Journal of Chemistry published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, SDS of cas: 1821-27-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Vellaisamy, M. published the artcileMechanistic studies of oxidation of substituted oxo acids by IFC in the presence of 1,10-phenanthroline, Computed Properties of 2051-95-8, the publication is Journal of the Indian Chemical Society (2019), 96(6), 721-725, database is CAplus.

The catalytic activity of 1,10-phenanthroline (phen) in imidazolium fluorochromate (IFC) oxidation of 4-oxo-4-phenylbutanoic acid (4-oxo acids) has been studied in 50% acetic acid-50% water medium. The reaction is first order each in imidazolium fluorochromate, oxo acid and hydrogen ion concentration The rate of the reaction has been conducted at five different temperatures Thermodn. parameters have been calculated A good correlation is found to exist between log k₁(308 K) and Hammett constant (¦Ò). For substituted oxoacids, the electron withdrawing substituents retard the reaction rate, while the electron releasing substituents enhance the rate of the reaction. The order of reactivities with substituents is p-CH₃O > p-CH₃ > p-C₆H₅ > H > p-Cl > p-Br > m-NO₂ is due to the presence of +I and -I effect. The Exner plot k₂₍₃₁₃?_K) vs. k₂₍₃₁₈?_K) is linear and isokinetic temperature is obtained. This supports that all the reactions under this investigation follow a common mechanism. The constant ¦¤G values are obtained for all the substituted compounds It also indicates that the substituted compounds are oxidized by same mechanism. Benzoic acid has been identified as the corresponding product of oxidation Based on the kinetics results, a suitable mechanism has been proposed.

Journal of the Indian Chemical Society published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C8H15NO, Computed Properties of 2051-95-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia