Tag: M.W=50-100

Zhou, Shenghui published the artcileZirconium-lignosulfonate polyphenolic polymer for highly efficient hydrogen transfer of biomass-derived oxygenates under mild conditions, Category: alcohols-buliding-blocks, the main research area is zirconium lignosulfonate polyphenolic polymer hydrogen transfer biomass oxygenate mild.

Both value-added utilization of low-rank renewable feedstocks to prepare catalytic materials and selective transformation of bioderived aldehydes are very attractive topics. Herein, lignosulfonate, a waste byproduct from the paper industry, was simply assembled with ZrCl4 under non-toxic hydrothermal conditions for scalable preparation of Zr-containing polyphenolic biopolymer catalysts (Zr-LS). Systematic characterizations indicated that the strong coordination between Zr4+ and phenolic hydroxyl groups in lignosulfonate led to the formation of strong Lewis acid-base couple sites (Zr4+-O2-) and porous inorganic-organic framework structure (mesopores centered at 6.1 nm), while the inherent sulfonic groups in lignosulfonate could serve as Bronsted acidic sites. The cooperative role of these versatile acid-base sites in Zr-LS afforded excellent catalytic performance for Meerwein-Ponndorf-Verley (MPV) reaction of a broad range of bioderived platform chems. under mild conditions (80 °C), especially of furfural (FF) to furfuryl alc. (FA), in quant. yields (96%) with high FA formation rate of 9600 μmol g-1 h-1 and TOF of 4.37 h-1. Kinetic studies revealed that the activation energy of the MPV reduction of FF was as low as 52.25 kJ/mol, accounting for the high reaction rate. Isotopic labeling experiments demonstrated direct hydrogen transfer from the α-C of 2-PrOH to the α-C of FF on acid-base sites was the rate-determining step. Moreover, Zr-LS showed good recyclability for at least seven reaction cycles.

Applied Catalysis, B: Environmental published new progress about Adsorption. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mangoufis-Giasin, Iosif published the artcileDifferent promoting roles of ruthenium for the oxidation of primary and secondary alcohols on PtRu electrocatalysts, Safety of 3-Pentanol, the main research area is oxidation catalsyt primary econdary alc platinum ruthenium electrocatalyst.

This study shows remarkably different features between the oxidation of secondary and primary C3-C5 alcs. The oxidation of primary alcs. is controlled by the oxidative removal of blocking adsorbates, such as CO, formed after the dissociative adsorption of alc. mols. Conversely, secondary alcs. do not undergo dissociative adsorption and therefore their oxidation is purely controlled by the energetics of the elementary reaction steps. In this respect, a different role of Ru is revealed for the electrooxidation of primary and secondary alcs. on bimetallic Pt-Ru catalysts. Ru enhances the oxidation of primary alcs. via the established bifunctional mechanism, in which the adsorption of (hydr)oxide species that are necessary to remove the blocking adsorbates is favored. In contrast, the oxidation of secondary alcs. is enhanced by the Ru-assisted stabilization of an O-bound intermediate that is involved in the potential-limiting step. This alternative pathway enables the oxidation of secondary alcs. close to the equilibrium potential.

Journal of Catalysis published new progress about Adsorption. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Safety of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhu, Kaili published the artcileOne-Pot Synthesis of Tensile-Strained PdRuCu Icosahedra toward Electrochemical Hydrogenation of Alkene, Computed Properties of 584-02-1, the main research area is alkene lead ruthenium copper icosahedra one pot synthesis.

Electrochem. hydrogenation (ECH) uses electricity to drive proton (H+) reduction for hydrogenation, which can greatly reduce energy supply and environmental pollution, representing an ideal alternative to traditional thermal hydrogenation. In this work, we put forward tensile-strained PdRuCu alloy to promote ECH. Tensile strain promotes the adsorption of C=C by changing the d-band center. Meanwhile, alloying Ru and Cu into Pd lattice facilitates hydrogenation by weakening Pd-H bonding. Therefore, PdRuCu icosahedra display excellent ECH performance of 2-methyl-3-buten-2-ol (MBE) with specific activity of 227.4μmolMBE nm-2 min-1 at -0.3 V vs. reversible hydrogen electrode (RHE), about 16.1 and 10.5 times higher than that of com. Pd/C and Ru/C, resp. In addition, PdRuCu icosahedra was excellent in the scaling up of substrate concentration combined with anisyl alc. oxidation to produce high-value added anisaldehyde at anode. This work provides a guideline for the rational design of highly active and durable metallic catalyst in ECH.

ChemElectroChem published new progress about Adsorption. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Computed Properties of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

MacQueen, Blake published the artcileOptimum Reaction Conditions for 1,4-Anhydroerythritol and Xylitol Hydrodeoxygenation over a ReOx-Pd/CeO2 Catalyst via Design of Experiments, Related Products of alcohols-buliding-blocks, the main research area is anhydroerythritol xylitol hydrodeoxygenation ReO palladium Ceria catalyst.

In this study, we demonstrate that for the simultaneous hydrodeoxygenation (HDO) of 1,4-anhydroerythritol a comparable yield of THF is obtained at half the previously reported H2 pressure. The simultaneous hydrodeoxygenation was conducted using a heterogeneous ReOx-Pd/CeO2 catalyst. An L9 Taguchi design of experiment was enacted to elucidate the temperature, pressure, and catalyst loading effects on the yield of the HDO reaction by testing pressures ranging from 40 to 80 bar H2, temperatures of 100-180 °C, and Re loadings of 2-4 weight %. Our design showed that the yield of this reaction is significantly affected by the reaction temperature only. An L9 Taguchi design was conducted for xylitol simultaneous hydrodeoxygenation with pressures ranging from 5 to 10 bar H2, temperatures of 140-180 °C, and Re loadings of 2-4 weight %. The xylitol design elucidated the direct relation of pressure, and the inverse relation of temperature and catalyst loading, to yield with the optimal reaction condition being 140 °C and 10 bar H2.

Industrial & Engineering Chemistry Research published new progress about Deoxidation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

OReilly, Matthew C. published the artcileDiscovery-Based Bromination of Alcohols: An Organic Chemistry Experiment Supporting Spectroscopic Analysis and Mechanistic Reasoning, Quality Control of 584-02-1, the main research area is isomeric alc bromination laboratory experiment.

The bromination of six isomeric alcs. is adapted to a discovery-based organic chem. laboratory experiment, whereby students are provided an alc. starting material and are charged with determining the product or product mixture produced using relevant spectroscopic data. The experiment solidifies NMR anal. skills while reinforcing the mechanistic reasoning that supports the study of organic reactions. The laboratory is highly customizable and can be adapted to align with available instrumentation to best meet the needs of students, and it has been successfully implemented at three sep. universities.

Journal of Chemical Education published new progress about Bromination. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Quality Control of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Penghan published the artcileOn sample preparation methods for fermented beverage VOCs profiling by GCxGC-TOFMS, Recommanded Product: 3-Pentanol, the main research area is fermented beverage sample preparation VOC profiling GCxGC TOFMS; Fermented beverages; Sample preparation methods; Two dimensional gas chromatography–mass spectrometry; VOC profiling.

Aromas and tastes have crucial influences on the quality of fermented beverages. The determination of aromatic compounds requires global non-targeted profiling of the volatile organic compounds (VOCs) in the beverages. However, exptl. VOC profiling result depends on the chosen VOC collection method. This study aims to observe the impact of using different sample preparation techniques [dynamic headspace (DHS), vortex-assisted liquid-liquid microextraction (VALLME), multiple stir bar sorptive extraction (mSBSE), solid phase extraction (SPE), and solid phase micro-extraction (SPME)] to figure out the most suitable sample preparation protocol for profiling the VOCs from fermented beverages. Five common sample preparation methods were studied with beer, cider, red wine, and white wine samples. After the sample preparation, collected VOCs were analyzed by two-dimensional gas chromatog. coupled with time of flight mass spectrometry (GCxGC-TOFMS). GCxGC oven parameters can be optimized with the Box-Behnken surface response model and response measure on peak dispersion. Due to the unavoidable column and detector saturation during metabolomic anal., errors may happen during mass spectrum construction. Profiling results obtained with different sample preparation methods show considerable variance. Common findings occupy a small fraction of total annotated VOCs. For known fermentative aromas, best coverage can be reached by using SPME together with SPE for beer, and VALLME for wine and cider. GCxGC-TOFMS is a promising tool for non-targeted profiling on VOCs from fermented beverages. However, a proper data processing protocol is lacking for metabolomic anal. Each sample preparation method has a specific profiling spectrum on VOC profiling. The coverage of the VOC metabolome can be improved by combining complementary methods.

Metabolomics published new progress about Apple juice. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Recommanded Product: 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Di Berto Mancini, Marika published the artcileChange of Selectivity in C-H Functionalization Promoted by Nonheme Iron(IV)-oxo Complexes by the Effect of the N-hydroxyphthalimide HAT Mediator, COA of Formula: C5H12O, the main research area is nonheme iron oxo complex hydroxyphthalimide hydrogen transfer hydrocarbon oxidation.

A kinetic anal. of the hydrogen atom transfer (HAT) reactions from a series of organic compounds to the iron(IV)-oxo complex [(N4Py)FeIV(O)]2+ and to the phthalimide N-oxyl radical (PINO) has been carried out. The results indicate that a higher activating effect of α-heteroatoms toward the HAT from C-H bonds is observed with the more electrophilic PINO radical. When the N-hydroxy precursor of PINO, N-hydroxyphthalimide (NHPI), is used as a HAT mediator in the oxidation promoted by [(N4Py)FeIV(O)]2+, significant differences in terms of selectivity have been found. Product studies of the competitive oxidations of primary and secondary aliphatic alcs. (1-decanol, cyclopentanol, and cyclohexanol) with alkylaroms. (ethylbenzene and diphenylmethane) demonstrated that it is possible to modify the selectivity of the oxidations promoted by [(N4Py)FeIV(O)]2+ in the presence of NHPI. In fact, alkylarom. substrates are more reactive in the absence of the mediator while alcs. are preferably oxidized in the presence of NHPI.

ACS Omega published new progress about Biomimetics. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, COA of Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Yi-Ru published the artcileLong-Range Self-Assembly of an Electron-Deficient Hexaazatrinaphthylene with Out-of-Plane Substituents, Application In Synthesis of 584-02-1, the main research area is soft crystal; charge transport; hexaazatrinaphthylenes; liquid crystals; self-assembly; supramolecular chemistry.

The unprecedented time-dependent long-range supramol. assembly of electron-deficient hexaazatrinaphthylene (HATN) core based on peripheral crowding with three out-of-plane cyclic ketals is reported. The single-crystal X-ray structure of the di-Et derivative provided detailed information as to how four mols. in a repeating unit were packed in order to avoid steric crowding of the out-of-plane cyclic ketal side chain, providing locking and fastening for stabilizing the self-assembled structure. The polarizing optical microscopy (POM) and differential scanning calorimetry (DSC) did not instantaneously show any phase transition upon the cooling process. To our surprise, POM images showed a nucleation of spherulite up to 100μm after 24 h later. X-ray diffraction data further confirmed that these soft crystal formed a hexagonal-like crystal. The long-range self-assembly of the new material showed a slight red shift in the UV-vis absorption spectra and further substantiated by computational method.

ChemPlusChem published new progress about Aggregation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Application In Synthesis of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kiss, Nora Zsuzsa published the artcileContinuous flow esterification of a H-phosphinic acid, and transesterification of H-phosphinates and H-phosphonates under microwave conditions, Related Products of alcohols-buliding-blocks, the main research area is continuous flow esterification phosphinic acid phosphonate transesterification; H-phosphinates; H-phosphinic acid; H-phosphonates; esterification; microwave flow reactor; transesterification.

The microwave (MW)-assisted direct esterification of phenyl-H-phosphinic acid, transesterification of the alkyl phenyl-H-phosphinates so obtained, and the similar reaction of dibenzyl phosphite (DBP) were investigated in detail, and the batch accomplishments were translated into a continuous flow operation that, after optimization of the parameters, such as temperature and flow rate, proved to be more productive. Alcoholysis of DBP is a two-step process involving an intermediate phosphite with two different alkoxy groups. The latter species are of synthetic interest, as precursors for optically active reagents.

Molecules published new progress about Alcoholysis. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yu, Jie published the artcileEffect of infrared ray roasting on oxidation stability and flavor of virgin rapeseed oils, Computed Properties of 584-02-1, the main research area is virgin rapeseed oil oxidation stability flavor IR ray roasting; flavor; infrared ray roasting; oxidation stability; virgin rapeseed oil.

Effects of IR ray roasting (IRR) on the oxidation stability and flavors of virgin rapeseed oil (VROs) at 110-170°C were investigated and compared with traditional roller roasting (TRR). Results showed that IRR samples showed lower acid and peroxides values, higher oxidation stability index, and 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity than TRR ones. IRR samples displayed better thermal expansion of rapeseed for internal fragmentation from microstructures, which facilitated the release of tocophenols (652.63-748.78 mg/kg) and 4-vinylsyringol (7.54-678.19 mg/kg), compared with TRR ones with tocophenols (652.63-689.28 mg/kg) and 4-vinylsyringol (7.54-524.18 mg/kg) contributing to better oxidation stability. Moreover, important volatile compounds, including pyrazines, isothiocyanates, nitriles and aldehydes, were formed quant. more in IRR than TRR samples, which was attributed to better heat transfer efficiency and internal fragmentation promoting complex reactions inside rapeseed. Therefore, IRR has more pos. roasting effects on VROs than TRR.

Journal of Food Science published new progress about Acid number. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Computed Properties of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts