Tag: M.W=100-150

Lei, Zepeng published the artcileHighly stable dioxin-linked metallophthalocyanine covalent organic frameworks, Computed Properties of 91-16-7, the publication is Chinese Chemical Letters (2021), 32(12), 3799-3802, database is CAplus.

We report a series of highly stable metallophthalocyanine-based covalent organic frameworks (MPc-dx-COFs) linked by robust 1,4-dioxin bonds constructed through nucleophilic aromatic substitution (S_NAr) reaction. The chem. structures and crystallinity of the COFs largely remain unchanged even after treating with boiling water (90 °C), concentrated acids (12 mol/L HCl) or bases (12 mol/L NaOH), oxidizing (30% H₂O₂) or reducing agents (1 mol/L NaBH₄) for three days due to their stable M-Pc building blocks and resilient dioxin linkers. With metalated phthalocyanine active sites regularly arranged in the stable framework structures, MPc-dx-COFs can be directly used as efficient electrocatalysts for the oxygen reduction reaction (ORR) without pyrolysis treatment that has commonly been used in previous studies.

Chinese Chemical Letters published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

D’Orsi, Rosarita published the artcileKumagawa and Soxhlet Solvent Fractionation of Lignin: The Impact on the Chemical Structure, Quality Control of 91-16-7, the publication is ACS Omega (2022), 7(29), 25253-25264, database is CAplus and MEDLINE.

We investigated the effects of solvent fractionation on the chem. structures of two com. tech. lignins. We compared the effect of Soxhlet and Kumagawa extraction The aim of this work was to compare the impact of the methods and of the solvents on lignin characteristics. Our investigation confirmed the potentialities of fractionation techniques in refining lignin properties and narrowing the mol. weight distribution. Furthermore, our study revealed that the Kumagawa process enhances the capacity of oxygenated solvents (ethanol and THF) to extract lignin that contains oxidized groups and is characterized by higher average mol. weights Furthermore, the use of THF after ethanol treatment enabled the isolation of lignin with a higher ratio between carbonyl and other oxidized groups. This result was confirmed by attenuated total reflectance-Fourier transform IR spectroscopy (ATR-FTIR), ¹³C NMR and two-dimensional (2D) NMR spectroscopies, gel permeation chromatog. (GPC), and anal. pyrolysis-gas chromatog.-mass spectrometry (GC-MS) anal. UV-visible (UV-vis) spectra evidenced the enrichment in the most conjugated species observed in the extracted fractions. Elemental analyses pointed at the cleavage of C-heteroatom bonds enhanced by the Kumagawa extraction

ACS Omega published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Quality Control of 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Chang, Meng-Yang published the artcileGram-Scale Synthesis of Substituted Triarylmethanes, Quality Control of 91-16-7, the publication is Synthesis, database is CAplus.

A high-yield, open-vessel route for the facile-operational, gram-scale synthesis of functionalized triarylmethanes (TRAMs) was described via silica-coated magnetic nanoparticles of modified polyphosphoric acid (NiFe₂O₄@SiO₂-PPA)-mediated intermol. Friedel-Crafts reaction of substituted aryl aldehydes with 2 equiv of oxygenated arenes under environmentally friendly reaction conditions. Among the overall reaction process, only water was generated as the byproduct. Various reaction conditions were investigated for efficient transformation.

Synthesis published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Quality Control of 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Zhuang, Xiuzheng published the artcileSelective catalysis for the reductive amination of furfural toward furfurylamine by graphene-co-shelled cobalt nanoparticles, Application In Synthesis of 6850-57-3, the publication is Green Chemistry (2022), 24(1), 271-284, database is CAplus.

Amines with functional groups are widely used in the manufacture of pharmaceuticals, agricultural chems., and polymers but most of them are still prepared through petrochem. routes. The sustainable production of amines from renewable resources, such as biomass, is thus necessary. For this reason, we developed an eco-friendly, simplified, and highly effective procedure for the preparation of a non-toxic heterogeneous catalyst based on earth-abundant metals, whose catalytic activity on the reductive amination of furfural or other derivatives (more than 24 examples) proved to be broadly available. More surprisingly, the cobalt-supported catalyst was found to be magnetically recoverable and reusable up to eight times with an excellent catalytic activity; on the other hand, the gram-scale tests catalyzed by the same catalyst exhibited the similar yield of the target products in comparison to its smaller scale, which was comparable to the com. noble-based catalysts. Further results from a series of anal. technologies involving XRD, XPS, TEM/mapping, and in situ FTIR revealed that the structural features of the catalyst are closely in relation to its catalytic mechanisms. In simple terms, the outer graphitic shell is activated by the electronic interaction as well as the induced charge redistribution, enabling the easy substitution of the -NH2 moiety toward functionalized and structurally diverse mols., even under very mild industrially viable and scalable conditions. Overall, this newly developed catalyst introduces the synthesis of amines from biomass-derived platforms with satisfactory selectivity and carbon balance, providing cost-effective and sustainable access to the wide applications of reductive amination.

Green Chemistry published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C8H5F3O3, Application In Synthesis of 6850-57-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xia, Jiajin published the artcileDivergent Access to Polycyclic N-Heterocyclic Compounds through Büchner-Type Dearomatization Enabled Cycloisomerization of Diynamides under Gold Catalysis, HPLC of Formula: 6850-57-3, the publication is Organic Letters (2022), 24(23), 4298-4303, database is CAplus and MEDLINE.

Herein, an unprecedented gold-catalyzed oxidative Buechner-type cyclopropanation of diynamides was described to afford polycyclic N-heterocyclic products I [R¹ = mesyl, nosyl, tosyl; R² = Ph, 4-MeC₆H₄, 2-ClC₆H₄, etc.], II [R³ = Ph, 4-FC₆H₄, 4-BrC₆H₄, etc.], III [R⁴ = Ph, 3-thienyl, 2-ClC₆H₄, etc.] and IV [R⁵ = Ph, 3-ClC₆H₄, 3-BrC₆H₄, etc.; R⁶ = mesyl, tosyl]. By variation of the position of substituents on the Ph ring, a variety of compounds I, II, III, IV with challenging structural skeletons were obtained divergently.

Organic Letters published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C15H24O2, HPLC of Formula: 6850-57-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Hu, Weiyao published the artcileRapidly and mildly transferring anatase phase of graphene-activated TiO₂ to rutile with elevated Schottky barrier: Facilitating interfacial hot electron injection for Vis-NIR driven photocatalysis, Quality Control of 6850-57-3, the publication is Nano Research, database is CAplus.

Visible and even IR (IR) light-initiated hot electrons of graphene (Gr) catalysts are a promising driven power for green, safe, and sustainable H₂O₂ synthesis and organic synthesis without the limitation of bandgap-dominated narrow light absorption to visible light confronted by conventional photocatalyst. However, the life time of photogenerated hot electrons is too short to be efficiently used for various photocatalytic reactions. Here, we proposed a straightforward method to prolong the lifetime of photogenerated hot electrons from graphene by tuning the Schottky barrier at Gr/rutile interface to facilitate the hot electron injection. The rational design of Gr-coated TiO₂ heterojunctions with interface synergy-induced decrease in the formation energy of the rutile phase makes the phase transfer of TiO₂ support proceed smoothly and rapidly via ball milling. The optimized Gr/rutile dyad could provide a H₂O₂ yield of 1.05 mM·g^-1·h^-1 under visible light irradiation (λ â‰?400 nm), which is 30 times of the state-of-the-art noble-metal-free titanium oxide-based photocatalyst, and even achieves a H₂O₂ yield of 0.39 mM·g^-1·h^-1 on photoexcitation by near-IR-region light (âˆ?800 nm).

Nano Research published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C8H11NO, Quality Control of 6850-57-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Huang, Mingzheng published the artcileComparative characterization and sensory significance of volatile compounds in Rosa roxburghii Tratt fruit from five geographic locations in Guizhou, China, Application of 1,2-Dimethoxybenzene, the publication is Flavour and Fragrance Journal (2022), 37(3), 163-180, database is CAplus.

Rosa roxburghii Tratt (Chestnut rose) is native to China where it is cultivated for its strongly aromatic hips (pseudo fruits); locally known as cili. Increasing interest in cili for food and beverage products prompted an evaluation of its aroma compounds and the influence of geog. source. Accordingly, the volatile compounds in cili from five locations in Guizhou province were analyzed by headspace-solid-phase microextraction coupled with gas chromatog.-mass spectrometry. Sixty-seven volatile compounds were identified. Principal component anal. distinguished three sample groups by geog. source. The aroma of cili juice from each location was characterized by quant. descriptive anal. using six odor descriptors. Cili aroma was predominantly sweet/fruity, floral and green, but geog. source significantly influenced the intensity of the sweet/fruity and floral notes. Odor activity analyses indicated that 40 volatile compounds contribute appreciably to the aroma of cili. Of those compounds, only ten esters, two aldehydes, one alc. and one aromatic compound were common to all regional samples. Those findings extend the range of volatiles detected in cili. These results identify those that are present in odor active amounts and provide the first evidence of the impact of geog. source on the aroma and flavor of cili.

Flavour and Fragrance Journal published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Application of 1,2-Dimethoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xu, Hui published the artcileDesigning fluorene-based conjugated microporous polymers for blue light-driven photocatalytic selective oxidation of amines with oxygen, Computed Properties of 6850-57-3, the publication is Applied Catalysis, B: Environmental (2021), 119796, database is CAplus.

Conjugated microporous polymers (CMPs) have been showcased with a brilliant prospect in organic semiconductor photocatalysis, attributing to accessible mol. design, chem. stability and environmental friendliness. Here, two novel fluorene-based CMPs were designed and conveniently synthesized with carbazole as an electron donor. Importantly, subtle variation of substituent at the methylene bridge (9-position) of fluorene precursor results in different performances in which di-Me substituent was proven to be more efficient than difluoro substituent for blue light photocatalysis. MFC [9,9′-(9,9-dimethyl-9H-fluorene-2,7-diyl)bis(9H-carbazole)]-CMP has a much larger sp. surface area, a more favorable redox position, and resultantly a superior photocatalytic performance during blue light-driven selective oxidation of amines into imines with oxygen (O₂) in an environmentally benign solvent ethanol (C₂H₅OH). This work suggests that subtle tweaking in electron acceptors could give rise to superior photocatalytic activity for CMPs in selective chem. conversions.

Applied Catalysis, B: Environmental published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C4H6N2, Computed Properties of 6850-57-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Yang, Shaoxiong published the artcileModulating the Stacking Model of Covalent Organic Framework Isomers with Different Generation Efficiencies of Reactive Oxygen Species, Name: (2-Methoxyphenyl)methanamine, the publication is ACS Applied Materials & Interfaces (2021), 13(25), 29471-29481, database is CAplus and MEDLINE.

The development of a facile synthesis and controllable layer stacking approach for covalent organic frameworks (COFs) is an important issue for modulating their properties and realizing their application diversity. Herein, three COF isomers with different stacking models (eclipsed AA, staggered AB, and ABC stacking) were obtained by modulating the reaction temperature and solvent medium. Exptl. and theor. calculations show that the ABC stacking isomer obtained at room temperature is the kinetic product, while the AA stacking isomer prepared by the solvothermal method is a thermodn. product. Owing to the tautomerism involved in the reaction process, these isomers possess different ratios of enol and keto forms. Thus, they exhibit different generation efficiencies of Type I and Type II reactive oxygen species (ROS). The ABC stacking isomers could be employed as metal-free heterogeneous photocatalysts for visible-light-induced oxidation of amines to imines, owing to the highest generation efficiency of Type I ROS.

ACS Applied Materials & Interfaces published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C4H10Br2CoO2, Name: (2-Methoxyphenyl)methanamine.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Zhou, Jun published the artcileCooperative photocatalysis of dye-TiO₂ nanotubes with TEMPO⁺BF^–₄ for selective aerobic oxidation of amines driven by green light, SDS of cas: 6850-57-3, the publication is Applied Catalysis, B: Environmental (2021), 120368, database is CAplus.

Visible light photocatalysis could offer an eco-friendly alternative for selective transformation of organic mols. Herein, a cooperative system is created with alizarin red S (ARS), TiO₂ nanotubes (TNTs), and an extra redox mediator. The electron transfer between oxidatively quenched ARS-TNTs and the redox mediator is the key to secure cooperative photocatalysis. The selective aerobic oxidation of primary and secondary amines was constructed by cooperative photocatalysis of ARS-TNTs with 2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (TEMPO⁺BF^–₄) driven by green light. Specifically, the activity of anatase TNTs could reach about 2.2 times that of the P25 (Aeroxide P25) TiO₂ precursor. Due to increased polarity, TEMPO⁺BF^–₄ serves more efficiently for electron transfer than (2,2,6,6-tetramethylpiperidin-1-yl)oxy (TEMPO), conferring above 1.5 times of activity that of TEMPO for the selective aerobic conversion of amines. This work features the potential of designing redox mediators in amplifying cooperative photocatalysis driven by visible light.

Applied Catalysis, B: Environmental published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C23H20BN, SDS of cas: 6850-57-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem