Category: 645-56-7

Guan, Weixiang published the artcileHighly Dispersed Rh/NbO_x Invoking High Catalytic Performances for the Valorization of Lignin Monophenols and Lignin Oil into Aromatics, HPLC of Formula: 645-56-7, the publication is ACS Sustainable Chemistry & Engineering (2021), 9(9), 3529-3541, database is CAplus.

As fossil fuels are constantly depleted, valorization of lignocellulosic biomass into valuable aromatic compounds is of great significance but exceedingly challenging. In this work, the structure and catalytic performance of various Rh/Nb₂O₅ catalysts were studied in detail via the catalytic hydrodeoxygenation of a representative lignin monophenol compound 2-methoxy-4-propylphenol. The best catalytic performance was obtained over Rh/Nb₂O₅-400 (Nb₂O₅ calcined at 400°C) with an exceptional 98% yield of propylbenzene under 0.5 MPa H₂, which was mainly due to the cooperation between highly dispersed Rh metals and NbO_x species, in which Rh was responsible for dissociation of H₂ and NbO_x for breaking of C-O bonds at the metal-support interface. Besides, the lignin oil obtained in depolymerization of raw pine wood was directly used as the substrate in the catalytic hydrodeoxygenation reaction over the Rh/Nb₂O₅-400 catalyst under 0.5 MPa H₂. Encouragingly, the liquid products were identified and found that lignin oil was completely converted into C₆-C₁₀ hydrocarbons (>99% selectivity) with an 80.1 mol % yield of aromatics The results achieved in this work highlighted that high-value utilization of lignocellulosic biomass feedstocks to produce aromatic chems. and liquid fuels could be achieved over Rh/Nb₂O₅ under a low hydrogen pressure.

ACS Sustainable Chemistry & Engineering published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, HPLC of Formula: 645-56-7.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Wang, Qiuyue published the artcileLow-Temperature Catalytic Hydrogenolysis of Guaiacol to Phenol over Al-Doped SBA-15 Supported Ni Catalysts, Computed Properties of 645-56-7, the publication is ChemCatChem (2020), 12(19), 4930-4938, database is CAplus.

Selective hydrogenolysis of aromatic carbon-oxygen (C_aryl-O) bonds is a key strategy for the generation of aromatic chems. from lignin. However, this process is usually operated at high temperatures and pressures over hydrogenation catalysts, resulting in a low selectivity for aromatics and an extra consumption of hydrogen. Here, a series of Al-doped SBA-15 mesoporous materials with different Si/Al molar ratios (Al-SBA-15) were prepared via a post-synthesis method using NaAlO₂ as the Al source, and then Al-SBA-15 supported Ni catalysts (Ni/Al-SBA-15) were prepared by a deposition-precipitation method using urea as the hydrolysis reagent. The prepared supports and catalysts were extensively characterized using various techniques such as XRD, N₂ adsorption/desorption, TEM, ²⁷Al NMR, NH₃-TPD, XPS, H₂-TPR, and pyridine-FT-IR, and the catalysts were evaluated in the hydrogenolysis of the C_aryl-O bond in guaiacol and lignin derived compounds under mild conditions. The effects of the Si/Al ratio in catalyst and reaction parameters on guaiacol conversion and product distribution were investigated in detail, associated with solvent effect. The incorporation of Al into the framework of SBA-15 can improve the Lewis acidity and the dispersion of the supported Ni particles and yet modulate the metal-support interactions, which are propitious to the hydrogenolysis of the C_aryl-O bond in guaiacol. The catalyst Ni/Al-SBA-15 with a Si/Al molar ratio of 10 shows the best performance with a guaiacol conversion of 87.4% and a phenol selectivity of 76.9% under the mild conditions conducted, because of its proper acidity, suitable metal-support interactions, and high dispersion of the active species. The present study would stimulate research and development in multi-functional catalysts for the generation of valuable chems. from biomass.

ChemCatChem published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C10H10O2, Computed Properties of 645-56-7.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Lin, Haotong published the artcileCharacterization of rheological properties and aging performance of bitumen modified by bio-oil from bamboo charcoal production, COA of Formula: C9H12O, the publication is Journal of Cleaner Production (2022), 130678, database is CAplus.

As a waste stream from charcoal production, the liquid bio-oil has not been properly used, leading to both environmental and economic issues. In this study, this deleterious waste was explored as a promising additive for petroleum-based bitumen. Raw bio-oil was pretreated through distillation under different temperature to remove undesirable components. The resulting medium and heavy bio-oil fractions were blended with petroleum-based bitumen by weight ratios up to 12% to obtain bio-bitumen. The rheol. and aging properties of the bio-bitumen were further evaluated with various test means. The results showed that the addition of bio-oil had softening effect on bitumen. Bio-bitumen performed better brittleness resistance with smaller Glover-Rowe parameters and better fatigue crack resistance at shorter crack length than that of base bitumen. The lower non-recoverable creep compliance of the heavy fraction modified bio-bitumen indicated its better rutting resistance, compared to that of the base bitumen. Characterization of the carbonyl and sulfoxide functional groups in the aged bitumen showed comparative aging performance of the bio-bitumen modified with heavy fraction. The findings of this study indicate that the promising potential of bio-oil heavy fraction to replace petroleum-based bitumen for generating sustainable road paving material.

Journal of Cleaner Production published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, COA of Formula: C9H12O.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Zhang, Jinping published the artcileBase-assisted activation of phenols in TiO₂ surface complex under visible light irradiation, Category: alcohols-buliding-blocks, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2022), 114005, database is CAplus.

Surface charge-transfer complex formed by TiO₂ and phenols has showed a great potential in visible-light photocatalysis. However, back electron transfer limits the charge transfer efficiency and the activation of phenols in surface complex. Herein, we disclosed the efficient activation of phenols in surface complex by introducing the base. Both homocoupling reactions and butylated hydroxytoluene-trapped experiments clearly demonstrated the generation of phenolic radicals from various lignin-derived substrates. The addition of base caused the blue-shifted absorption of surface complex, while increased the visible light-induced electron excitation from substrate to TiO₂. Vibrational spectra suggested that the interaction between phenolate and TiO₂ was stronger than the interaction between neutral phenol and TiO₂. This base-triggered strategy may be conducive to useful transformations or degradation of phenols via surface complex.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H5FO2, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Guo, Ge published the artcileCatalytic depolymerization of Kraft lignin towards liquid fuels over bifunctional molybdenum oxide based supported catalyst, Formula: C9H12O, the publication is Fuel (2021), 121599, database is CAplus.

Catalytic depolymerization of Kraft lignin towards valuable liquid fuels and monomeric phenols has been a significant and extremely attractive target, but it remains a great challenge. Herein, we report a catalytic system consisted of bifunctional molybdenum oxide based supported catalyst for catalytic lignin hydroconversion into alkylated benzenes and phenols. In the meantime, the achieved yield of liquid product was 95% and petroleum ether extracted product was 65% at 300°C for 12 h over 20%MoO_x/ZIF-8@ZIF-67 catalyst. The calorific value was increased from 25.66 MJ/ Kg to 34.31 MJ/Kg. The characterization studies show the incorporation of MoOx species leads to the synergy between redox sites and acid sites. The product anal. and catalytic studies demonstrate its synergism to promote catalytic cleavage of C-O linkages via the coupled hydrodeoxygenation and alkylation reaction. The reasonable catalytic mechanism and redox cycle route of catalyst indicate that the cooperative catalytic system paves the way for high-efficiency waste lignin utilization.

Fuel published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Formula: C9H12O.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Thiruvengetam, Prabaharan published the artcileControlled and Predictably Selective Oxidation of Activated and Unactivated C(sp³)-H Bonds Catalyzed by a Molybdenum-Based Metallomicellar Catalyst in Water, Recommanded Product: 4-Propylphenol, the publication is Journal of Organic Chemistry (2022), 87(6), 4061-4077, database is CAplus and MEDLINE.

The synthesis of carbonyl derivatives from renewable feedstocks, by direct oxidation/functionalization of activated and unactivated C(sp³)-H bonds under a controlled and predictably selective fashion, especially in late stages, remains a formidable challenge. Herein, for the first time, cost-effective and widely applicable protocols for controlled and predictably selective oxidation of petroleum waste and feedstock ingredients like methyl-/alkylarenes to corresponding value-added carbonyls have been developed, using a surfactant-based oxodiperoxo molybdenum catalyst in water. The methodologies use hydrogen peroxide (H₂O₂) as an environmentally benign green oxidant, and the reactions preclude the need of any external base, additive, or cocatalyst and can be operated under mild eco-friendly conditions. The developed protocols show a wide substrate scope and eminent functional group tolerance, especially oxidation-liable and reactive boronic acid groups. Upscaled multigram synthesis of complex steroid mols. by late-stage oxidation proves the robustness and practical utility of the current protocol since it employs an inexpensive recyclable catalyst and an easily available oxidant. A plausible mechanism has been proposed with the help of few controlled experiments and kinetic and computational studies.

Journal of Organic Chemistry published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C12H10FeO4, Recommanded Product: 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Du, Boyu published the artcileEffective fractionation strategy of sugarcane bagasse lignin to fabricate quality lignin-based carbon nanofibers supercapacitors, Application of 4-Propylphenol, the publication is International Journal of Biological Macromolecules (2021), 604-617, database is CAplus and MEDLINE.

Lignin is recommended to a tempting alternative precursor of petroleum for fabricating carbon nanofibers (CNFs) due to its high carbon content, low-cost and renewable resources. However, the property of lignin-based carbon nanofibers (LCNFs) is inferior owing to the heterogeneity and 3D-network structure of lignin, which hinders its application in supercapacitors. The latest developments in fractionation technol. have shown great potential for overcoming the aforementioned shortcomings. However, most of fractionation methods mainly rely on expensive chems. and complex reaction process, such as enzymes, multiple solvents, membranes, and dialysis tubes. Herein, we proposed a controllable and effective strategy to fractionate lignin by only changing the ratio of ethanol/water (V/V) as mixture solvent. This gradient extraction method effectively removed the part of lignin with small mol. and branching structure, thus selectively getting the fractionated lignin with high mol. weight, narrow polydispersity index, and good linear structure. Fortunately, when the ratio of ethanol/water was 6:4, the corresponding LCNFs (LCNFs-L60) was obtained with large sp. surface area, independent filamentous morphol. networks and excellent electrochem. property. Its specific capacitance was up to 405.8 F/g. This way features controllable and sustainable for preparing high-quality LCNFs supercapacitors.

International Journal of Biological Macromolecules published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Application of 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Zhang, Yue published the artcileDiphenyl Diselenide-Catalyzed Synthesis of Triaryl Phosphites and Triaryl Phosphates from White Phosphorus, Application of 4-Propylphenol, the publication is Organic Letters (2021), 23(13), 5158-5163, database is CAplus and MEDLINE.

Industrially important triaryl phosphites, traditionally prepared from PCl₃, have been synthesized by a di-Ph diselenide-catalyzed one-step procedure involving white phosphorus and phenols, which provides a halogen- and transition metal-free way to these compounds Subsequent oxidation of triaryl phosphites produces triaryl phosphates and triaryl thiophosphates. Phosphorotrithioates are also prepared efficiently from aromatic thiols and aliphatic thiols.

Organic Letters published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C11H9NO3, Application of 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Saraeian, Alireza published the artcileCatalyst Property Effects on Product Distribution during the Hydrodeoxygenation of Lignin Pyrolysis Vapors over MoO₃/γ-Al₂O₃, Name: 4-Propylphenol, the publication is ACS Sustainable Chemistry & Engineering (2021), 9(19), 6685-6696, database is CAplus.

Hydrodeoxygenation (HDO) of three model compounds (i.e., anisole, 4-propylphenol, and 2-butanone) and real lignin pyrolysis vapors was investigated at 673 K and ~1.7 bar of H₂ over a series of MoO₃/γ-Al₂O₃ catalysts with MoO₃ loadings ranging from 0 to 19 wt % as well as bulk MoO₃. Extensive characterization revealed catalyst acidity (strength) and the degree of MoO_x oligomerization as the two main parameters in determining product distribution. Strong Lewis acid sites of γ-Al₂O₃ were found to catalyze transalkylation, dealkylation, dehydration, and condensation reactions, the latter of which also led to high coke yields (up to 50 C%). The addition of MoO₃ progressively reduced the amount of strong Lewis acid sites and generated weaker Lewis and Bronsted acid sites with lower selectivity to condensation reactions resulting in lower coke yields. The growth of MoO_x domains depended on MoO₃ loading over the γ-Al₂O₃ support. At MoO₃ loadings higher than 8 wt %, crystalline orthorhombic MoO₃ phases were found, which behaved similar to bulk MoO₃ in catalyzing hydrogenation and HDO reactions. The integration of MoO_x species and acidity from the γ-Al₂O₃ support enabled the modulation of product selectivity. This work provides information for enabling the rational design of supported MoO₃ catalysts to allow for maximizing the production of valuable chems. (i.e., alkenes and aromatics) from HDO of lignin (or biomass) pyrolysis vapors.

ACS Sustainable Chemistry & Engineering published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Name: 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Masferrer-Rius, Eduard published the artcileAromatic C-H Hydroxylation Reactions with Hydrogen Peroxide Catalyzed by Bulky Manganese Complexes, Product Details of C9H12O, the publication is Advanced Synthesis & Catalysis (2021), 363(15), 3783-3795, database is CAplus.

The oxidation of aromatic substrates to phenols with H₂O₂ as a benign oxidant remains an ongoing challenge in synthetic chem. Herein, the authors successfully achieved to catalyze aromatic C-H bond oxidations using a series of biol. inspired manganese catalysts in fluorinated alc. solvents. While introduction of bulky substituents into the ligand structure of the catalyst favors aromatic C-H oxidations in alkylbenzenes, oxidation occurs at the benzylic position with ligands bearing electron-rich substituents. Therefore, the nature of the ligand is key in controlling the chemoselectivity of these Mn-catalyzed C-H oxidations Introduction of bulky groups into the ligand prevents catalyst inhibition through phenolate-binding, consequently providing higher catalytic turnover numbers for phenol formation. Furthermore, employing halogenated carboxylic acids in the presence of bulky catalysts provides enhanced catalytic activities, which can be attributed to their low pK_a values that reduces catalyst inhibition by phenolate protonation as well as to their electron-withdrawing character that makes the manganese oxo species a more electrophilic oxidant. Moreover, to the best of the authors’ knowledge, the new system can accomplish the oxidation of alkylbenzenes with the highest yields so far reported for homogeneous arene hydroxylation catalysts. Overall the authors’ data provide a proof-of-concept of how Mn(II)/H₂O₂/RCO₂H oxidation systems are easily tunable by the solvent, carboxylic acid additive, and steric demand of the ligand. The chemo- and site-selectivity patterns of the current system, a negligible KIE, the observation of an NIH-shift, and the effectiveness of using ^tBuOOH as oxidant overall suggest that hydroxylation of aromatic C-H bonds proceeds through a metal-based mechanism, with no significant involvement of hydroxyl radicals, and via an arene oxide intermediate.

Advanced Synthesis & Catalysis published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Product Details of C9H12O.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts