Catalysis-chemistry

Huang, Ting published the artcilePVDF-based molecularly imprinted ratiometric fluorescent test paper with improved visualization effect for catechol monitoring, HPLC of Formula: 13822-56-5, the publication is Microchemical Journal (2022), 107369, database is CAplus.

Various methods have been proposed for the determination of catechol (CT), however, the actual applications of these methods were restricted by instrument dependence, complex operations and difficulty of the on-site monitoring. In this work, a molecularly imprinted ratiometric fluorescent test paper based on hydrophobic polyvinylidene difluoride (PVDF) membrane was successfully prepared for facile and on-site monitoring of CT. Firstly, a uniform core-shell molecularly imprinted ratiometric fluorescence sensor (CdTe@SiO₂@Si QDs-MIPs) was successfully synthesized. Then the test paper was fabricated by facilely coating CdTe@SiO₂@Si QDs-MIPs on a PVDF membrane by the vacuum filtration method. Ultimately, under optimal conditions, CdTe@SiO₂@Si QDs-MIPs exhibited excellent stability and a relatively lower limit of detection (LOD) of 0.11¦ÌM, satisfied recovery rates of 97.73%-102.30% and relative standard deviations of 2.01%-2.34%. Moreover, the selective study and ions inference experiment synergistically proved that the polymer has good anti-interference ability. Afterwards, the PVDF membrane was eventually selected to be the optimal substrate due to the uniform distribution of fluorescent substances on its surface, thus, greatly improved the accuracy of detection. The resultant test paper hugely improved the practicability and provided a reference for water quality testing. The facile and efficient strategy reported here opens a window for the rapid, visual and on-site detection of CT in river water samples.

Microchemical Journal published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, HPLC of Formula: 13822-56-5.

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

Cai, Shunyou published the artcileVisible-light-enabled decarboxylative sulfonylation of cinnamic acids with sulfonylhydrazides under transition-metal-free conditions, Computed Properties of 1772-76-5, the publication is Organic Letters (2016), 18(12), 2990-2993, database is CAplus and MEDLINE.

Decarboxylative cross-coupling reactions of cinnamic acids with sulfonylhydrazides were explored using oxygen as the sole terminal oxidant, realizing a conceptually novel technol. for vinyl sulfone synthesis under the synergistic interactions of visible light irradiation, organic dye-type photocatalyst eosin Y, KI, and Cs₂CO₃ at room temperature

Organic Letters published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C9H7NO4, Computed Properties of 1772-76-5.

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

Yang, Bin published the artcileSynthesis of Difluoroalkylated Arenes by Hydroaryldifluoromethylation of Alkenes with ¦Á,¦Á-Difluoroarylacetic Acids under Photoredox Catalysis, Product Details of C15H15OP, the publication is Organic Letters (2016), 18(22), 5956-5959, database is CAplus and MEDLINE.

A visible-light-induced hydroaryldifluoromethylation of alkenes with ¦Á,¦Á-difluoroarylacetic acids for preparation of difluoroalkylated arenes has been developed. This reaction proceeds through the hypervalent iodine reagent promoted decarboxylation and subsequent radical hydroaryldifluoromethylation.

Organic Letters published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C4H5BN2O2, Product Details of C15H15OP.

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

Lin, Qing-Yu published the artcileVisible light-induced selective hydrobromodifluoromethylation of alkenes with dibromodifluoromethane, Application of Allyldiphenylphosphine oxide, the publication is Organic & Biomolecular Chemistry (2015), 13(32), 8740-8749, database is CAplus and MEDLINE.

A visible light-induced selective hydrobromodifluoromethylation of alkenes using CF₂Br₂ was developed. This transformation proceeded smoothly in the presence of catalytic Eosin Y at room temperature to give various hydrobromodifluoromethylated compounds with broad functional group tolerance.

Organic & Biomolecular Chemistry published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, Application of Allyldiphenylphosphine oxide.

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

Lin, Qing-Yu published the artcileVisible-Light-Induced Hydrodifluoromethylation of Alkenes with Bromodifluoromethylphosphonium Bromide, Formula: C15H15OP, the publication is Angewandte Chemie, International Edition (2016), 55(4), 1479-1483, database is CAplus and MEDLINE.

Bromodifluoromethylphosphonium bromide was solely used as the precursor of difluorocarbene. Herein, an unprecedented visible-light-induced hydrodifluoromethylation of alkenes with bromodifluoromethylphosphonium bromide using H₂O and THF as hydrogen sources for the synthesis of difluoromethylated alkanes is described. This difluoromethylation is characterized by mild reaction conditions, ready availability of reagents, and excellent functional-group tolerance.

Angewandte Chemie, International Edition published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, Formula: C15H15OP.

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

Zhao, Haoqiang published the artcileRh(I)-Catalyzed C6-Selective Decarbonylative Alkylation of 2-Pyridones with Alkyl Carboxylic Acids and Anhydrides, Application of 3-Benzoylpropionicacid, the publication is Organic Letters (2020), 22(11), 4228-4234, database is CAplus and MEDLINE.

A Rh-catalyzed chelation-assisted C6-selective C-H activation/alkylation of 2-pyridones e.g., 1-(pyridin-2-yl)-1,2-dihydropyridin-2-one with readily available anhydrides RC(O)OC(O)R (R = Me, Et, 2-methylpropyl, etc.) or alkyl carboxylic acids R¹C(O)OH (R¹ = nonyl, cyanoethyl, cyclohexyl, etc.) is introduced. The reaction proceeds via substrate decarbonylation. This approach merges C-H functionalization with readily available anhydrides, allowing for the efficient synthesis of various C6-alkylated 2-pyridones e.g., 6-methyl-2H-[1,2′-bipyridin]-2-one with good functional group tolerance.

Organic Letters 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 C14H26O2, Application of 3-Benzoylpropionicacid.

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

Mei, Ren-Qiang published the artcileAsymmetric Michael/cyclization tandem reaction of 4-hydroxycoumarin with ¦Â-nitroalkenes catalyzed by chiral bifunctional thioureas, Application of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Organic & Biomolecular Chemistry (2013), 11(8), 1286-1289, database is CAplus and MEDLINE.

The first asym. Michael/cyclization tandem reaction of 4-hydroxycoumarin with nitroolefins catalyzed by chiral bifunctional thioureas was reported and 2,3-dihydrofuro[3,2-c]coumarin adducts have been obtained in moderate yields (53-75%) and good enantioselectivities (64-90% ee).

Organic & Biomolecular Chemistry published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C10H11NO4, Application of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

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

Wang, Yangyang published the artcileLigand-Enabled C-H Olefination and Lactonization of Benzoic Acids and Phenylacetic Acids via Palladium Catalyst, Quality Control of 118-90-1, the publication is Organic Letters (2022), 24(3), 821-825, database is CAplus and MEDLINE.

A novel ligand propan-2-one O-(p-tolylcarbamoyl) oxime had been developed to promote C(sp²)-H olefination of benzoic acids and phenylacetic acids via a palladium catalyst. With the subsequent lactonization of the olefinated products through 1,4-addition, a highly monoselective cyclic lactone products of benzopyrones I [R¹ = 5-Me, 7-Cl, 5-F, etc.; R² = CO₂Me, CO₂Et, CO₂Bu, CO₂Bn, C(O)NHCH(CH₃)₂, P(O)(OEt)₂] and benzofuranones II [R³ = 5-Me, 6-MeO, 6-CF₃, etc.; R² = CO₂Me, CO₂Et, CO₂Bu, etc.] were obtained in moderate to excellent yields. The DFT calculation demonstrated that the novel ligand propan-2-one O-(p-tolylcarbamoyl) oxime could lubricate the C-H activation reaction to give cyclic lactone products elegantly.

Organic Letters published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C25H47NO8, Quality Control of 118-90-1.

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

Jonhson, Win published the artcile3D-Printed Hierarchical Ceramic Architectures for Ultrafast Emulsion Treatment and Simultaneous Oil-Water Filtration, Computed Properties of 13822-56-5, the publication is ACS Materials Letters (2022), 4(4), 740-750, database is CAplus.

There is a critical need for energy-efficient water treatment processes as the world seeks to limit global warming below 1.5¡ãC. Gravity-driven mesh filtration presents a sustainable solution to treating oily wastewater and emulsions, which are byproducts of many human activities. The promise of a green alternative is getting closer with the development of 3D printing combined with reusable, recyclable, and ubiquitous materials such as silica to produce durable and recyclable filters with controllable mesh spacing. In this work, several filters were fabricated to sep. oily water mixtures with a separation efficiency of 99% at high flow flux by coating 3D porous ceramic architectures with organosilanes. The proposed ceramic filters can also treat oil-in-water and water-in-oil surfactant-stabilized emulsions with high flow flux. This strategy to functionalize the 3D printed silica surface to form either hydrophobic or hydrophilic surfaces can open a new possibility for gravity-driven simultaneous oil-water separation The first gravity-driven hierarchical auto-oil-water separator (HAOS) was introduced to sep. an oily water mixture into two different containers using a combination of 3D printed hierarchical hydrophilic and hydrophobic filters without an addnl. postsepn. step.

ACS Materials Letters published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, Computed Properties of 13822-56-5.

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

Zhang, Jianxin published the artcileRedox and pH dual-stimuli responsive wormlike micelles based on CTAB and sodium dithiodibenzoate, Synthetic Route of 119-80-2, the publication is Journal of Dispersion Science and Technology, database is CAplus.

Stimulus-responsive wormlike micelles (WLMs) have attracted much attention in the past decade. In this work, dual-stimuli (pH and redox reaction) responsive WLMs were prepared with sodium 2,2¡ä-dithiodibenzoate (DTSA) and cetyltrimethylammonium bromide (CTAB). The WLMs can be reversibly switched on and off by an alternating redox reaction originating from the cleavage and reformation of the disulfide bonds in DTSA. Moreover, the WLMs can also respond to pH stimulus. The corresponding responsive behaviors of WLMs were revealed using rheometer, cryogenic transmission electron microscopy, and ¹H NMR analyses. The multi-stimuli responsive behavior makes the current system a good candidate for smart control of the sol-gel transition.

Journal of Dispersion Science and Technology 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 C44H28ClFeN4, Synthetic Route of 119-80-2.

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