Tag: M.W=100-150

Antinolo, Maria published the artcileTemperature Effects on the Removal of Potential HFC Replacements, CF₃CH₂CH₂OH and CF₃(CH₂)₂CH₂OH, Initiated by OH Radicals, Category: alcohols-buliding-blocks, the publication is Environmental Science & Technology (2011), 45(10), 4323-4330, database is CAplus and MEDLINE.

Gas phase kinetic coefficients of OH^– with 2 primary fluorinated alcs., CF₃CH₂CH₂OH (k₁) and CF₃(CH₂)₂CH₂OH (k₂), potential hydrofluorocarbon (HFC) replacements, are reported as a function of temperature (263-358° K) for the first time. K₁ and k₂ (together referred to as k_i) were measured under pseudo-first-order conditions with respect to the initial OH^– concentration using the pulsed laser photolysis/laser-induced fluorescence technique. The observed k_i temperature dependence (in cm³/mol.-s) is described by the following Arrhenius expressions: k₁(T) = (2.82 ± 1.28) × 10^-12 exp{-(302 ± 139)/T} cm³/mol.-s and k₂(T) = (1.20 ± 0.73) × 10^-11 exp{-(425 ± 188)/T} cm³/mol.-s. Arrhenius parameter uncertainties are at a 95% confidence level (±2σ). K_i(T) uncertainties include statistical and systematic errors. Activation energies were (2.5 ± 1.2) kJ/mol and (3.6 ± 1.6) kJ/mol for the OH^–-reaction with CF₃CH₂CH₂OH and CF₃(CH₂)₂CH₂OH, resp. Global lifetime (τ) at 275° K for CF₃CH₂CH₂OH and CF₃(CH₂)₂CH₂OH due to the OH^–-reaction was estimated to be approx. 2 wk and 5 days, resp. Reported Arrhenius parameters can be used in 3-dimensional models which account for geog. region and season of emissions to estimate a matrix of instantaneous lifetimes. As a consequence of the substitution of the -CH₃ group by a -CH₂OH group in HFC, e.g., CF₃CH₂CH₃ and CF₃(CH₂)₂CH₃, the tropospheric lifetime with respect to the OH^– reaction is significantly shorter, and, since their radiative forcing is similar, global warming potentials for CF₃CH₂CH₂OH and CF₃(CH₂)₂CH₂OH are negligible. Thus, CF₃CH₂CH₂OH and CF₃(CH₂)₂CH₂OH seem to be suitable alternatives for HFC.

Environmental Science & Technology published new progress about 2240-88-2. 2240-88-2 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol, name is 3,3,3-Trifluoropropan-1-ol, and the molecular formula is C3H5F3O, Category: alcohols-buliding-blocks.

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

Diao, Xinyong published the artcileRational design of oligomeric MoO₃ in SnO₂ lattices for selective hydrodeoxygenation of lignin derivatives into monophenols, Name: 4-Propylphenol, the publication is Journal of Catalysis (2021), 234-251, database is CAplus.

Novel Mo-Sn bimetallic oxide catalysts with highly dispersed oligomeric MoO₃ in SnO₂ lattices, which were synthesized by the co-precipitation method and pretreated by anhydrous ethanol, were first employed in the hydrodeoxygenation of various lignin derivatives to produce monophenols with high activity and selectivity. In comparison with the pure α-MoO₃ and the previous reported catalysts, the α-2Mo1Sn exhibited superior activity in the hydrodeoxygenation of guaiacol, with full conversion and 92.5% phenol yield at 300°C under 4 MPa initial H₂ pressure in n-hexane for 4 h. According to comprehensive characterizations and catalytic measurements, the excellent performance of α-2Mo1Sn was ascribed to the formation of abundant Sn-O-Mo-O_V interfacial sites, which possessed strong Mo-Sn interaction with enhanced surface area, electron-donating group binding ability, Lewis acidity, and redox ability. It was demonstrated that over the present α-2Mo1Sn catalyst system, the Sn-O-Mo-O_V interfacial sites could greatly facilitate the adsorption and activation of C_aromatic-OCH₃ and C_aromatic-CH₃ bonds, and thus significantly promote the demethoxylation and demethylation reaction to produce phenol. This work figures out the rational design of MoO₃-based catalyst and displays a clear potential for the selective hydrodeoxygenation of lignin derivatives into monophenols.

Journal of 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, Name: 4-Propylphenol.

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

Diao, Xinyong published the artcileFabricating high temperature stable Mo-Co₉S₈/Al₂O₃ catalyst for selective hydrodeoxygenation of lignin to arenes, COA of Formula: C9H12O, the publication is Applied Catalysis, B: Environmental (2022), 121067, database is CAplus.

Achieving high-temperature stability/duration without compromising the activity remains an arduous task in catalyst design, particularly for MoS₂ materials. Herein, a robust catalyst with Mo doped Co₉S₈ nanoparticles anchored on Al₂O₃ matrix is fabricated, which could selectively convert lignin to arenes with high hydrodeoxygenation activity, selectivity and particularly excellent stability. In the hydrodeoxygenation of di-Ph ether, this catalyst afforded 99.8% conversion and 91.0% yield of benzene at 265°C for at least 10 reaction runs. The resultant Mo-Co₉S₈ structure with chem. connection by covalent bonds of Mo-S-Co type on the Co₉S₈ surface demonstrates strong ability in the adsorption and activation of oxygen-containing substrates, which enables the effective C-O cleavage while avoids undesirable hydrogenation of benzene ring. The superior stability and water-resistance at elevated temperature was attributed to the anchoring effect of Al₂O₃ matrix and “protection” of surface-rich Co₉S₈ species to the active Mo-Co₉S₈ center. This strategy provides new sights for the rational design of efficient and stable sulfide catalysts toward the applications in demanding high-temperature reactions.

Applied Catalysis, B: Environmental 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

Zhao, Shen published the artcileHighly efficient and selective oxidation of various substrates under mild conditions using a lanthanum-containing polyoxometalate as catalyst, Formula: C6H16OSi, the publication is Applied Catalysis, A: General (2013), 188-194, database is CAplus.

A La-containing polyoxometalate (POM) of DA₁₁[La(PW₁₁O₃₉)₂] (denoted as DA-La(PW₁₁)₂; DA = Decyltrimethylammonium cation) is highly efficient and selective for oxidation of various substrates including alkenes, alkenols, sulfides, silane and alc. with only one equivalent H₂O₂ as oxidant at 25°, and the POM catalyst can be easily recovered and reused for ten times without obvious decrease of catalytic activity and the yields for catalyst recovery are all >95%. The epoxidation of cis-cyclooctene proceeds efficiently in 98% yield with only 0.08 mol% of DA-La(PW₁₁)₂, and the turnover number (TON) can reach ≤1200 at 25°.

Applied Catalysis, A: General published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C15H14N2, Formula: C6H16OSi.

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

Ma, Yuan published the artcileTheoretical study on the formation mechanisms, dynamics and the effective catalysis of the nitrophenols, Category: alcohols-buliding-blocks, the publication is ChemistrySelect (2018), 3(36), 10188-10197, database is CAplus.

The hydrogen abstraction reactions of mono-substituted phenols and nitrogen dioxide may be the sources of HONO and phenoxy radical. Further addition reaction of NO₂ and phenoxy radical can form 2-nitrophenol (2-NP) and 4-nitrophenol (4-NP). The specific formation mechanisms and dynamics of NPs have drawn significant attention in recent days. The promoted reaction mechanisms by water, phenol and intermediate have also been studied. Compared with the naked reaction, the catalytic pathways can reduce the energy barrier from 48.40 kcal/mol to 18.23, 23.03 and 18.87 kcal/mol to form 2-NP, resp. Water mols. are the most effective catalysts, and the energy barrier could be further reduced to 8.20 kcal/mol when three water mols. are participating in the reaction. Water mols. can not only promote the formation of 4-NP, but also simplify the reaction steps. In general, the water mols. serve as catalysts in the formation of NPs. The rate constants of 2-NP and its hydrates have been predicted. The results are listed as follows: k_2-NP =3.82×10^-13; k_2-NP-1W =2.43×10^-7; k_2-NP-2W =3.39×10^-4 cm³mol.^-1s^-1. The rate constants of mono-substituted phenols (methylamino phenol, aminophenol and hydroquinone) and NO₂ are also predicted by the traditional transitional state theory and variational transition state theory using the B3LYP/6-311++G(3df,3pd)//6-311++G(d). For the most dominant path, the rate constants for o/m/p-methylaminophenol are 1.91×10^-14, 4.28×10^-20 and 8.78×10^-15 cm³mol.^-1s^-1, resp.

ChemistrySelect published new progress about 14703-69-6. 14703-69-6 belongs to alcohols-buliding-blocks, auxiliary class Amine,Benzene,Phenol, name is 3-(Methylamino)phenol, and the molecular formula is C7H9NO, Category: alcohols-buliding-blocks.

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

Huang, Jinshu published the artcileA New Lamellar Biocarbon Catalyst with Enhanced Acidity and Contact Sites for Efficient Biodiesel Production, Product Details of C9H12O, the publication is Waste and Biomass Valorization, database is CAplus.

Biochar is a type of green, biodegradable, sustainable, and cheap carbon material, which is typically prepared by pyrolysis, gasification, and hydrothermal carbonization methods at relatively high temperatures (≤ 180 °C), but generally facing with small sp. surface areas and low acid d. In this study, lignin-derived monomers were explored as carbon sources to prepare porous biochars at a low temperature of 80 °C. The carbonaceous catalyst (PPR-SO₃H-80) was found to be composed of irregular particles accumulated by lamellar carbon, and have a large sp. surface area (165.2 m²/g) and good thermal stability. Meanwhile, PPR-SO3H-80 had a high d. of -SO₃H (3.56 mmol/g), which increases with the degree of carbon defects. Importantly, the co-existence of -OH and -COOH in a certain amount with -SO3H on PPR-SO3H-80 could significantly promote the production of biodiesel (up to 97.1% yield), as optimized by the response surface method (RSM). In addition, PPR-SO3H-80 exhibited good stability and could be recycled 4 times with biodiesel yield slightly decreasing to 90.3%. A new lamellar biochar catalyst with enhanced acidity and large surface area as well as co-existed -SO₃H, -OH and -COOH acidic species was facilely prepared and could efficiently produce biodiesel with a high yield of 97.1%.

Waste and Biomass Valorization 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

Park, Sohyun published the artcileValidating the Mott Formula with Self-Assembled Monolayer (SAM)-Based Large-Area Junctions: Effect of Length, Backbone, Spacer, Substituent, and Electrode on the Thermopower of SAMs, Formula: C8H10S, the publication is Journal of Physical Chemistry C (2021), 125(36), 20035-20047, database is CAplus.

Understanding how the Seebeck effect of organic thermoelec. devices is associated with the chem. structure of active mols. within the devices is a key goal in organic and mol. thermoelecs. This paper describes a series of phys.-organic studies that investigate structure-thermopower relationships in self-assembled monolayers (SAMs) through measurements of the Seebeck coefficient (S, μV/K) using the eutectic gallium-indium (EGaIn)-based junction technique. Several hypotheses were derived from a transmission function-based simple toy model, the Lorentzian transmission function-based Mott formula. These hypotheses were tested by comparing values of S for simple alkyl and aryl mols. with different structures in terms of backbone, length, spacer, anchor, and substituent, and for different electrodes (Au vs Ag), and by monitoring responses of S to the structural modifications. Exptl. obtained S values were further reconciled with values simulated by the Mott formula and with interfacial electronic structure and mol.-electrode coupling strength, independently measured by UPS and transition voltage spectroscopy.

Journal of Physical Chemistry C published new progress about 4410-99-5. 4410-99-5 belongs to alcohols-buliding-blocks, auxiliary class Thiol,Benzene, name is 2-Phenylethanethiol, and the molecular formula is C8H10S, Formula: C8H10S.

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

Santhakumari, Sivasubramanian published the artcileIn vitro and in vivo effect of 2,6-Di-tert-butyl-4-methylphenol as an antibiofilm agent against quorum sensing mediated biofilm formation of Vibrio spp., Formula: C6H13NO2, the publication is International Journal of Food Microbiology (2018), 60-71, database is CAplus and MEDLINE.

This study unveils the in vitro and in vivo antibiofilm potential of 2,6-Di-tert-butyl-4-methylphenol (DTBMP) from Chroococcus turgidus against Vibrio spp. In the preliminary study, cell free culture supernatant (CFCS) of C. turgidus inhibited the violacein production in biomarker strain Chromobacterium violaceum and its mutant strain CV026 in a dose dependent manner. The effective biofilm inhibitory concentration (BIC) of pure compound DTBMP from C. turgidus was identified as 250μg/mL concentration in tested Vibrio species. Furthermore, DTBMP proved to effectively inhibit the bioluminescence production in V. harveyi and other biofilm related virulence traits such as exopolysaccharides (EPS) production, hydrophobicity index, swimming and swarming motility at its BIC concentration in three major pathogenic vibrios: V. harveyi, V. parahaemolyticus and V. vulnificus. The antibiofilm potential of DTBMP was validated through light, confocal laser scanning and scanning electron microscopic analyses. In addition, the non-bactericidal effect of DTBMP was determined through growth curve and 2,3-bis (2-methyloxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT) assay. Real-time PCR studies revealed the down-regulation of master quorum sensing (QS) regulator genes of V. harveyi such as luxR, luxS, luxP, luxQ and luxO on treatment with DTBMP. In vivo results confirmed that DTBMP augmented the survival rate of Litopenaeus vannamei larvae up to 75, 88 and 66% upon infection with V. harveyi, V. parahaemolyticus and V. vulnificus, resp. The results of this study ascertain the promising effects of DTBMP as an antibiofilm agent, which could be pos. explored to treat biofilm-associated vibrios infections in aquaculture.

International Journal of Food Microbiology published new progress about 622-40-2. 622-40-2 belongs to alcohols-buliding-blocks, auxiliary class Morpholine,Alcohol, name is 2-Morpholinoethanol, and the molecular formula is C6H13NO2, Formula: C6H13NO2.

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

Ramachandran, P. Veeraraghavan published the artcileCritical Role of Catalysts and Boranes for Controlling the Regioselectivity in the Rhodium-Catalyzed Hydroboration of Fluoroolefins, Product Details of C3H5F3O, the publication is Organic Letters (1999), 1(9), 1399-1402, database is CAplus.

Catalytic hydroboration of perfluoroalkylethylenes (R_FCH:CH₂) with cationic and neutral rhodium complexes allows for selective access to either regioisomeric alc. after hydroboration with catechol- and pinacolboranes, followed by oxidation with alk. hydrogen peroxide.

Organic Letters published new progress about 2240-88-2. 2240-88-2 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol, name is 3,3,3-Trifluoropropan-1-ol, and the molecular formula is C3H5F3O, Product Details of C3H5F3O.

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

Kim, Soo Min published the artcilePostsynthetic Functionalization of a Hollow Silica Nanoreactor with Manganese Oxide-Immobilized Metal Nanocrystals Inside the Cavity, Related Products of alcohols-buliding-blocks, the publication is Journal of the American Chemical Society (2013), 135(42), 15714-15717, database is CAplus and MEDLINE.

A postsynthetic protocol of functionalizing the preformed hollow nanoparticles with metal nanocrystals was developed based on galvanic replacement reaction on the Mn₃O₄ surface inside the cavity. The developed protocol produced hollow nanoreactor systems, in which a high d. of ultrafine catalytic nanocrystals of a range of noble metals, such as Pd, Pt, Rh, and Ir and their alloys, are dispersively immobilized on an interior surface enclosed by a selectively permeable silica shell. The fabricated hollow nanoreactor exhibited highly enhanced activity, selectivity, and recyclability in catalyzing the oxidation of hydrosilanes, which are attributable to the synergistic combination of the porous silica nanoshell and the oxide-immobilized catalyst system.

Journal of the American Chemical Society published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C6H16OSi, Related Products of alcohols-buliding-blocks.

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