Month: December 2022

Kirk, Ansgar T. published the artcileImproving Ion Mobility Spectrometer Sensitivity through the Extended Field Switching Ion Shutter, HPLC of Formula: 111-87-5, the main research area is ion mobility spectrometer sensitivity; detection proton bound dimer measured ketone.

Field switching ion shutters allow generating short ion packets with high ion densities by first ionizing for several milliseconds in a field-free ionization region and then quickly pushing the entire ion population out into the drift region. Thus, they are an excellent choice for compact ion mobility spectrometers with both high resolving power and low limits of detection. Here, we present an improved setup, named the extended field switching ion shutter. By generating a second field-free region between the ionization region and the drift region, shielding of the ionization region is significantly improved, even when using grids with higher optical transparency to improve ion transmission into the drift region. Furthermore, it is shown that under certain conditions, ion transmission through multiple grids in series can even surpass transmission through a single grid of the same transparency. For the studied ions, the signal intensity at low concentrations increases by approx. a factor of 7 to 9 for protonated monomers, 10 to 14 for proton-bound dimers, and 25 for the proton-bound 1-octanol trimer compared to the classical field switching shutter. However, due to the nonlinear response for ions containing multiple analyte mols., the limits of detection improve only by a factor of 3 to 4 for proton-bound dimers and 3 for the proton-bound 1-octanol trimer. Nevertheless, this still leads to single-digit pptv limits of detection for protonated monomers and hundred pptv limits of detection for proton-bound dimers measured for a series of ketones. However, for the most intense peaks such as the reactant ion peak, a significant loss of resolving power by a factor of up to 1.4 was observed due to Coulomb repulsion.

Analytical Chemistry (Washington, DC, United States) published new progress about Coulomb potential. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, HPLC of Formula: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Murray, Jane S. published the artcileA general model for the solubilities of gases in liquids, Formula: C8H18O, the main research area is general model solubility gas liquid; Aqueous solutions; Coulombic interactions; Dispersion; Electrostatic potentials; Gaseous solubility; Organic solvents; Polarizability.

The solubility of a compound is one of its most important properties. Here, regression relationships are presented for solubilities of a series of gases in water and in four organic solvents, treating each solvent sep. The solubilities are related to the Coulombic intermol. interactions arising from the intrinsic polarities of the solute mols. and the polarities induced in them by the solvent. As a measure of intrinsic polarity, a statistical quantity defined in terms of the solute’s mol. electrostatic potential is used, and the measure of induced polarity is taken to be the solute’s mol. polarizability. Regression analyses show that solubility in water is best expressed in terms of just the intrinsic polarities of the solutes, but for the organic solvents, it is necessary to take into account both the intrinsic and the induced polarities of the solutes. If the dielec. constant of the solvent is included in the regression anal., then a single relationship can encompass all four organic solvents. Solute mol. volumes were not found to contribute significantly to the present relationships.

Journal of Molecular Modeling published new progress about Coulomb potential. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mahmoudabadi, Samane Zarei published the artcileInvestigation of COSMO-SAC model for solubility and cocrystal formation of pharmaceutical compounds, Recommanded Product: rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, the main research area is acetone heptane cocrystal solubility pharmaceutical.

In this study, a predictive model named COSMO-SAC was investigated in solid/liquid equilibrium for pharmaceutical compounds The examined properties were the solubility of drug in the pure and mixed solvents, octanol/water partition coefficient, and cocrystal formation. The results of the original COSMO-SAC model (COSMO-SAC (2002)) was compared with a semi-predictive model named Flory-Huggins model and a revised version of the COSMO-SAC (COSMO-SAC (2010)). The results indicated the acceptable accuracy of the COSMO-SAC (2002) in the considered scope. The results emphasized on the suitability of the COSMO-SAC model for simple mols. containing C, H, and O by covalent and hydrogen bonding interactions. Applicability of the COSMO-SAC for more complicated mols. made of various functional groups such as COO and COOH doubly requires more modification in the COSMO-SAC.

Scientific Reports published new progress about Cocrystallization. 124-76-5 belongs to class alcohols-buliding-blocks, name is rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, and the molecular formula is C10H18O, Recommanded Product: rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kamatani, Yoshio published the artcileReaction of an oxadiazinetrione derivative and its application to polyurethane coatings, Related Products of alcohols-buliding-blocks, the main research area is oxadiazinetrione reaction isocyanate amine catalyst; crosslinker oxadiazinetrione derivative polyurethane coating.

Tertiary amines were used as catalysts for the reaction of oxadiazinetrione (I) and primary hydroxyl groups and comparable reactivities of NCO groups and I were easily obtained. I derivatives of hexamethylene diisocyanate were useful as hardeners for polyurethane coatings curable at ambient temperature Coating compositions prepared from I prepolymers and polyols showed short drying and hardening time and low curing temperature The coating film had good phys. and chem. properties.

Journal of Coatings Technology published new progress about Coating materials. 2212-32-0 belongs to class alcohols-buliding-blocks, name is N2-(2-Hydroxyethyl)-N1,N1,N2-trimethyl-1,2-ethylenediamine, and the molecular formula is C7H18N2O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Nowacka, Maria published the artcileThiol-ene addition of mercaptoalcohols to poly(vinylsiloxanes) under visible light photocatalysis – An approach towards cross-linkable hydrophilic silicones, Quality Control of 7575-23-7, the main research area is thiol addition mercaptoalc polyvinylsiloxane visible light photocatalysis crosslinking; silsesquioxane vinyl thiol crosslinking wearable electronic microfluidic.

Addition of thiol compounds bearing electron-withdrawing substituents linked to sulfur atom to vinyl-group containing organosiloxane polymers may be achieved without any catalyst or initiator, only on exposure to visible light. This approach allows for preparation of silicone copolymers with desired amount of unsaturated residues and hydrophilic groups. No detrimental side reactions involving vinyl substituents were observed Sp. surface energy of the obtained crosslinked films and their linear precursors is relatively low despite the presence of -OH groups, irresp. of their amount and the nature of the support. It makes the prepared copolymers interesting materials to be used as silicone inks for stretchable and wearable electronic devices as well as in microfluidics.

Polyhedron published new progress about Coating materials. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Stalin, Sanjuna published the artcileDesigning Polymeric Interphases for Stable Lithium Metal Deposition, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is lithium battery solid electrolyte interphase fluorinated polymer coating stability; Electrochemistry; Lithium batteries; Operando-Microscopy; Polymer Coatings; Solid electrolyte interphases; Stability Analysis.

Reactive metals are known to electrodeposit with irregular morphol. features on planar substrates. A growing body of work suggest that multiple variables: composition, mechanics, structure, ion transport properties, reductive stability, and interfacial energy of interphases, formed either spontaneously or by design on the metal electrode play important but differentiated roles in regulating these morphologies. We examine the effect of fluorinated thermoset polymer coatings on Li deposition by means of experiment and theor. linear stability anal. By tuning the chem. of the polymer backbone and side chains, we investigate how phys. and mech. properties of polymeric interphases influence Li electrodeposit morphol. It is found that an interplay between elasticity and diffusivity leads to an optimum interphase thickness and that higher interfacial energy augments elastic stresses at a metal electrode to prevent out-of-plane deposition. These findings are explained using linear stability anal. of electrodeposition and provide guidelines for designing polymer interphases to stabilize metal anodes in rechargeable batteries.

Nano Letters published new progress about Coating materials. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Name: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kamatani, Yoshio published the artcileReaction of an oxadiazinetrione derivative and its application to polyurethane coatings, SDS of cas: 2212-32-0, the main research area is isocyanate oxadiazinetrione derivative crosslinker; amine catalyst urethane formation; phosphine catalyst urethane formation; lead octanoate catalyst; polyurethane coating crosslinking agent.

In the reaction of 3,5-bis(6-isocyanatohexyl)-2H-1,3,5-oxadiazine-2,4,6(3H,5H)-trione (I) [50639-37-7] with H(OCH2CH2)2OMe [111-77-3] in solution at 70°, tertiary amines, Bu3P, and Pb octanate were good catalysts, giving conversions of 87-100%. In the reaction of I with Bu methacrylate-hydroxyethyl methacrylate-iso-Bu methacrylate-styrene copolymer  [77402-19-8] to give a coating, tertiary amines were suitable catalysts. In curing polyurethane coatings at relative humidity (RH) 0% and 50%, I is a little more reactive than tris(6-isocyanatohexyl)biuret (II), and the dependence of I reactivity on RH is smaller than that of II. Coatings from I-based polyurethanes had good curability in early stages, while those from II- and tris(6-isocyanatohexyl)isocyanurate-based polyurethanes required 2-3 times longer to attain the same hardness.

Polymeric Materials Science and Engineering published new progress about Coating materials. 2212-32-0 belongs to class alcohols-buliding-blocks, name is N2-(2-Hydroxyethyl)-N1,N1,N2-trimethyl-1,2-ethylenediamine, and the molecular formula is C7H18N2O, SDS of cas: 2212-32-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Huang, Dijun published the artcilePreparation and characterization of a novel ultraviolet/thermal dual-curing thiol-ene/polyurethane acrylate coating, Safety of Pentaerythritol tetra(3-mercaptopropionate), the main research area is thiol ene polyurethane acrylate coating UV thermal curing.

A novel UV/thermal dual-curing thiol-ene/polyurethane acrylate (PUA) coating of PUA oligomer, tripropylene glycol diacrylate, 2,4,6-trimethylbenzoyldiphenyl phosphine oxide, and trimethylolpropane tris (3-mercaptopropionate) was prepared The coating had a rapid surface drying rate with UV radiation (400 W, 50 W/cm2). For example, the surface of the novel thiol-ene/PUA coating dried within 3 s. The hardness, gel content, and initial decomposition temperature at 5 wt% weight loss of the UV/thermal dual-cured sample after 10 min of UV irradiation, followed by heating at 150°C for 20 min, were 37 D, 90.3%, and 302.2°C, resp., which were higher than the 30 D, 87.7% and 284.9°C of the UV curing control after 10 min of UV irradiation The curing time of the 1-mm-thick coating was 4.5 min in indoor sunlight (2.3 ± 0.3 mW/cm2) with a gel content of 83.8%. This coating could be applied in the rapid prototyping field with UV or sunlight exposure. Thermal treatment after UV curing could increase the crosslinking degree and influence the sample performance.

Journal of Coatings Technology and Research published new progress about Coating materials. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Safety of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

de Souza, Mandy published the artcileWater activated healing of thiolene boronic ester coatings, Category: alcohols-buliding-blocks, the main research area is thiolene boronic ester coating water activated healing.

A vinyl Ph boronic ester (VPBE) was synthesized and cured with pentaerythritol tetrakis(3-mercaptoptopionate) (PTMP) and 3,6-dioxa-1,8-octanedithiol (DODT) to produce boronic ester polymer networks. The reversible nature of the boronic ester linkage in water provides an opportunity to investigate their intrinsic healing for a variety of crosslink densities and healing conditions. The boronic ester networks prepared here, all had sub-ambient glass transition temperatures (Tg) and therefore enhanced mol. mobility at room temperature and above. Intrinsic healing of the different networks is investigated after making scratches on the polymer surface and observing behavior in humid environments, underwater and a hot dry environment. Underwater healing, as measured by the reduction in the size of the scratch, is extemely efficient and completely healed any surface scratches. This is compared with room temperature healing in moist environments where healing efficiency is more than 60% after 6 h. In a hot dry environment, no healing is observed The healing mechanism is investigated using 3D profilometry, optical microscopy and fourier transform IR spectroscopy (FTIR) which revealed that scratches become wider at the scratch rim, but more shallow over time. It is propsed that the presence of moisture at the base of the scratch facilitates a zipping up effect as the surface comes together to re-esterify.

Progress in Organic Coatings published new progress about Coating materials. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kini, Rajesh published the artcileExploring the use of Isomalt as the tooth friendly sugar substitute in the formulation of Salbutamol sulfate compressed tablet lozenges, Quality Control of 64519-82-0, the main research area is salbutamol sulfate tablet lozenge isomalt compression tooth sugar.

Medicated lozenges of Salbutamol sulfate for pediatric, geriatric and Dysphagic patients were formulated and Isomalt was used as the sugar substitute in the prepared lozenges. The compressed tablet lozenges were prepared by wet granulation technique from three developed methods like, ordered mixture of drug, from the drug adsorbate of magnesium trisilicate and from the spray dried hybrid mixture of drug and mannitol, using Isomalt as a sugar substitute, glycerin, citric acid artificial flavours and colors and other essential excipients. The prepared medicated lozenges were characterized for drug content uniformity, tablet hardness, thickness, weight variation, friability and in vitro disintegration and dissolution by pharmaceutical standard methods. Accelerated stability study conducted as per ICH guidelines (zone IV) at 45°C and 75% relative humidity over a period of seven weeks found that there wasn’t any substantial interaction between the drugs, flavor and color and the prepared formulations were stable.

International Journal of PharmTech Research published new progress about Child development. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Quality Control of 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts