Category: alcohols-buliding-blocks

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

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

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

Ramirez-Contreras, Rodrigo published the artcileChemo- and Regioselective Functionalization of Polyols through Catalytic C(sp3)-C(sp3) Kumada-Type Coupling of Cyclic Sulfate Esters, Synthetic Route of 58783-82-7, the main research area is chemoselective regioselective functionalization Kumada type coupling cyclic sulfate ester; copper catalyst coupling cyclic sulfate ester alkyl Grignard reagent.

This contribution describes a copper-catalyzed, C(sp3)-C(sp3) cross-coupling reaction of cyclic sulfate esters, a distinct class of electrophilic derivatives of polyols, with alkyl Grignard reagents to afford functionalized alc. products in good yields. The method is operationally simple and highlights the potential of cyclic sulfate esters as highly reactive substrates in catalytic, chemoselective polyol transformations.

Organic Letters published new progress about Coupling reaction. 58783-82-7 belongs to class alcohols-buliding-blocks, name is 5-Tridecanol, and the molecular formula is C13H28O, Synthetic Route of 58783-82-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Laroussarie, Anais published the artcileSynthesis of the Tetrasaccharide Repeating Unit of the β-Kdo-Containing Exopolysaccharide from Burkholderia pseudomallei and B. cepacia Complex, Synthetic Route of 87905-98-4, the main research area is stereoselective glycosylation galactosylation coupling oligosaccharide KDO preparation exopolysaccharide Burkholderia.

The synthesis of the repeating unit of the immunogenic β-Kdo-containing exopolysaccharide produced by Burkholderia pseudomallei and bacteria of the B. cepacia complex is described. The target tetrasaccharide was synthesized via stereoselective 1,2-cis- and 1,2-trans-galactosylation and β-Kdo formation. A [3+1] coupling reaction between a trigalactosyl N-phenyl-2,2,2-trifluoroacetimidate donor and a Kdo acceptor has been successfully achieved for the assembly of the tetrasaccharide skeleton.

Journal of Organic Chemistry published new progress about Coupling reaction. 87905-98-4 belongs to class alcohols-buliding-blocks, name is Benzyl (5-hydroxypentyl)carbamate, and the molecular formula is C13H19NO3, Synthetic Route of 87905-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Shen, Peng published the artcileHard-soft thiol-ene materials without interfacial weakness, Product Details of C17H28O8S4, the main research area is hard soft thiolene click material PDMS mold prepared property.

Thiol-ene materials are a series of materials that can be crosslinked using a suitable photo-initiator and a UV light source. An advantage of thiol-ene materials is that they can be tailored to have specific mech. properties by controlling the stoichiometry of the mixtures By combination of different reactants, it is therefore, in principle, possible to prepare monoliths with greatly varying mech. properties from essentially the same material. In this paper, we prepared an alternating hard and soft thiol-ene material with a sharp solid interface. Tetrakis (3-mercaptopropionate) (PETMP) with 1, 3, 5-triallyl-1, 3, 5-triazine-2, 4, 6(1H, 3H, 5 H)-trione (TATATO) as the hard segment exhibited strong tensile and compressive strength but had low elongation and weak bending stiffness. A mixture of PETMP and trimethylolpropane diallyl ether (TMPDE) was selected as the soft segment. After stretching at 0.001 s-1 using a filament stretching rheometer (FSR), the soft segment fractured at the strain of 21%, while the interface of the materials was strong enough to prevent cracking.

Materials Today Communications published new progress about Crack propagation. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Product Details of C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ahangaran, Fatemeh published the artcileDevelopment of self-healing epoxy composites via incorporation of microencapsulated epoxy and mercaptan in poly(methyl methacrylate) shell, Category: alcohols-buliding-blocks, the main research area is epoxy mercaptan self healing agent PMMA microcapsule preparation property.

Self-healing composites based on epoxy resin containing poly(Me methacrylate) (PMMA) microcapsules filled with healing agents were prepared The effect of healing agents microcapsules on mech. properties and self-healing behavior of epoxy composites were investigated in this work. Epoxy and mercaptan as curing agent were microencapsulated in PMMA shell as two-component healing agent through internal phase separation method, and then, epoxy composites containing 2.5, 5, 7.5 and 10 wt% of healing agent microcapsules were prepared The fracture toughness and healing efficiency of these composites were measured using a tapered double cantilever beam (TDCB) specimen. The results indicated that about 80% healing efficiency was achieved with 10 wt% PMMA microcapsules at room temperature after 24 h. The tensile strength of the epoxy with 2.5 wt% PMMA microcapsules increased initially and then decreased gradually with increasing microcapsules content up to 10 wt% PMMA microcapsules. DSC results also indicated that this system has good potential for spontaneous self-healing performance at room temperature

Polymer Testing published new progress about Crack propagation. 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

Tratnik, Nicole published the artcileRecyclable, self-strengthening starch-based epoxy vitrimer facilitated by exchangeable disulfide bonds, Quality Control of 7575-23-7, the main research area is recycling starch epoxy vitrimer disulfide tensile crosslinking.

Epoxy vitrimers have emerged as a new class of self-healing, recyclable, and reprocessable materials, offering new opportunities to traditional epoxy thermosets by improving life-span, while providing addnl. functionalities. Nevertheless, retaining 100% of the original mech. performances remains difficult for vitrimers after several reprocessing cycles due to progressive changes in the vitrimer networks during rearrangements. In this study, we designed a novel epoxy vitrimer with a higher renewable content compared to conventional epoxies by using renewable materials. The bio-based epoxy vitrimer was synthesized from epoxidized starch amylopectin together with diallyl disulfide, that is naturally found in garlic, and a thiol (pentaerythritol tetrakis(3-mercaptopropionate) (PETMP)). Diallyl disulfide and PETMP enabled the formation of a recyclable, and reprocesseable, vitrimer network. The epoxy vitrimer displayed unprecedented self-strengthening after 5 recycling cycles (tensile strength increased over 900%) caused by the mech.-induced homogeneization of the diallyl disulfide/thiol and the starch epoxy ghost granule phases during the recycling process, thereby increasing the vitrimer crosslinking d. during reformation. Reprocessing the vitrimer 5-times improved the mech. and thermal properties, raising glass transition temperature, Young’s modulus, and tensile strength from 7°C to 25°C, 2.98 MPa to 268 MPa, and 1.87 MPa to 18.47 MPa, resp. Hence, capitalizing on mech.-induced phase homegeneization during the vitrimer reprocessing, this work introduces a strategy for the design of self-strengthening bio-based and recyclable thermosets.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Crosslink density. 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

Luo, Chaoqian published the artcileReal-Time Alignment and Reorientation of Polymer Chains in Liquid Crystal Elastomers, Application In Synthesis of 7575-23-7, the main research area is real alignment reorientation polymer chain liquid crystal elastomer; Fourier-transform infrared spectroscopy; Mesogen alignment; liquid crystal elastomer; polarized optimal measurements; real-time characterization; reorientation.

Liquid crystal elastomers (LCEs) exhibit soft elasticity due to the alignment and reorientation of mesogens upon mech. loading, which provides addnl. mechanisms to absorb and dissipate energy. This enhanced response makes LCEs potentially transformative materials for biomedical devices, tissue replacements, and protective equipment. However, there is a critical knowledge gap in understanding the highly rate-dependent dissipative behaviors of LCEs due to the lack of real-time characterization techniques that probe the microscale network structure and link it to the mech. deformation of LCEs. In this work, we employ in situ optical measurements to evaluate the alignment and reorientation degree of mesogens in LCEs. The data are correlated to the quant. phys. anal. using polarized Fourier-transform IR spectroscopy. The time scale of mesogen alignment is determined at different strain levels and loading rates. The mesogen reorientation kinetics is characterized to establish its relationship with the macroscale tensile strain, and compared to theor. predictions. Overall, this work provides the first detailed study on the time-dependent evolution of mesogen alignment and reorientation in deformed LCEs. It also provides an effective and more accessible approach for other researchers to investigate the structural-property relationships of different types of polymers.

ACS Applied Materials & Interfaces published new progress about Crosslink density. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application In Synthesis of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tian, Guangming published the artcileAn investigation on sunlight-induced shape memory behaviors of PCL/TiN composites film, Safety of Pentaerythritol tetra(3-mercaptopropionate), the main research area is polycaprolactone titanium nitride composite film shape memory behavior.

Plasmonic materials possess good optical properties in effectively converting solar energy into heat, here a series of sunlight responsive shape memory composites films based on acrylate-terminated Poly(ε-caprolactone) (PCL) and titanium nitride nanoparticles (TiN NPs) are prepared via base-catalyzed Michael addition Compared with conventional free radical polymerization or phys. blending, this paper constructs a network architecture from view of structural controllability, favoring a subsequent flexible and elastic materials as well as fine dispersion of TiN NPs in the crosslinked networks, the resultant materials show an outstanding mech. and the incorporated TiN NPs enable rapid temperature increase over the melting temperature of PCL and trigger the shape change of the composite with good shape recovery rate. The effect of light d. and TiN NPs concentration on composite film are elucidated and investigated systematically, it is found that the amount of TiN NPs content virtually has a negligible effect on the surface temperature of the films when subjected to a specific illumination, however, light intensity has a remarkable influence on it. Furthermore, an electronics device switch actuated by 160 mw cm-2 simulated sunlight irradiation is demonstrated and envisioned for flexible electronic applications.

Smart Materials and Structures published new progress about Crosslink density. 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