Month: December 2022

Sharapova, Angelica published the artcileSolubility and vapor pressure data of bioactive 6-(acetylamino)-N-(5-ethyl-1,3,4-thiadiazol-2-yl) hexanamide, Application of n-Octanol, the main research area is bioactive compound solubility elec conductivity.

This paper presents new exptl. data on some key physicochem. properties of original bioactive 6-(acetylamino)-N-(5-ethyl-1,3,4-thiadiazol-2-yl) hexanamide (AETH). Thermal anal. of the compound under study has been carried out using differential scanning calorimetry and thermogravimetric techniques. AETH solubility data in five pharmaceutically relevant solvents in the temperature range from 288.15 to 318.15 K have been obtained by the classic saturation shake-flask method. The bioactive compound has poor solubility in hexane and buffer solutions, while it is slightly soluble in selected alcs. The exptl. solubility results have been correlated by means of modified Apelblat and van’t Hoff equations. The selected thermodn. models produced acceptable results. The Hansen solubility parameters and their components for AETH and solvents have been evaluated by using the van Krevelen-Hoftyzer at. group contribution method. The ideal solubility and the solution activity coefficient at equilibrium in the selected solvents have been quantified based on exptl. values of melting enthalpy and temperature All the investigated solutions exhibit a pos. deviation from ideality with the maximal solubility in alcs. The equilibrium vapor pressure of the compound studied has been determined as a function of temperature in the range of 433.15-454.15 K by the transpiration method. The standard thermodn. parameters of AETH sublimation have been calculated

Journal of Chemical Thermodynamics published new progress about Crystals. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Cassidy, Kyle J. published the artcileComposite Particles From Pickering-Stabilized Radical Mediated Thiol-Ene Suspension Polymerizations, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is polythioether silica composite particle radical thiol ene suspension polymerization; pickering stabilization morphol thermal property.

Pickering stabilization is a facile method to create composite colloidal particles. Inorganic colloidal SiO2 nanoparticles are often used as the stabilizer for particles instead of the more common amphiphilic surfactants. Here the use of this approach in radical-mediated thiol-ene suspension polymerizations using monomers 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (TTT) and pentaerythritol tetrakis (3-mercaptopropionate) (PETMP) is described. The resulting micron-sized crosslinked poly(thioether) colloidal particles are coated with 80 nm silica nanoparticles. The addition of a small amount of various costabilizers is examined (hexadecane, cetyl alc. and toluene), and while all yielded particles, cetyl alc. provide more consistent results. SEM and thermal anal. of the composite particles demonstrate morphologies that are consistent with a raspberry-like structure. No significant changes to the glass transition temperature are observed, which is consistent with the silica nanoparticles being located at the surface of the polymer particles.

Macromolecular Reaction Engineering published new progress about Colloids. 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

Bebon, Rick published the artcileElectrostatic pair-interaction of nearby metal or metal-coated colloids at fluid interfaces, Application of n-Octanol, the main research area is electrostatic pair potential colloid.

In this paper, we theor. study the electrostatic interaction between a pair of identical colloids with constant surface potentials sitting in close vicinity next to each other at the fluid interface. By employing a simplified yet reasonable model system, the problem is solved within the framework of classical d. functional theory and linearized as well as nonlinear Poisson-Boltzmann (PB) theory. Apart from providing a sound theor. framework generally applicable to any such problem, our novel findings, all of which contradict common beliefs, include the following: first, quant. and qual. differences between the interactions obtained within the linear and the nonlinear PB theories; second, the importance of the electrostatic interaction between the omnipresent three-phase contact lines in interfacial systems; and, third, the occurrence of an attractive electrostatic interaction between a pair of identical metal colloids. The unusual attraction we report largely stems from an attractive line interaction, which although scales linearly with the size of the particle can compete with the surface interactions and can be strong enough to alter the nature of the total electrostatic interaction. Our results should find applications in metal or metal-coated particle-stabilized emulsions where densely packed particle arrays are not only frequently observed but also sometimes required. (c) 2020 American Institute of Physics.

Journal of Chemical Physics published new progress about Colloids. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sefannaser, Mahmud published the artcileRadiative Relaxation in Luminescent Silicon Nanocrystal Thiol-Ene Composites, Formula: C17H28O8S4, the main research area is radiative relaxation luminescent silicon nanocrystal thiol ene composite.

Efficient photoluminescence (PL) from silicon nanocrystal (SiNC) composites has important implications for emerging solar-collection technologies, yet a detailed understanding of the landscape of PL relaxation in vitrified colloidal SiNCs is still materializing. Here, we explore details of PL relaxation in photo-polymerized off-stoichiometric polymer/nanocrystal hybrids. Specifically, thiol-ene polymer/nanocrystal composites were synthesized from a tetra-functional thiol, tri-functional allyl, and a family of dodecyl-passivated colloidal SiNCs with peak PL wavelength spanning 700-950 nm. We find time- and air-stable emission from dilute composites with up to 70% quantum yield, and we investigate PL relaxation in the parameter space of nanocrystal size and temperature, focusing on changes in the partitioning of multimodal decay upon going from the colloid to composite. In light of previous work, our results reveal similarities between the impacts of crosslinking and cooling to cryogenic temperatures, both of which are characterized by a relative reduction in the availability of phonons.

Journal of Physical Chemistry C published new progress about Colloids. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Quodbach, Julian published the artcileCompaction behavior of isomalt after roll compaction, Name: (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, the main research area is galenIQ 801 tablet roll compaction dry granulation flowability friability.

The suitability of the new isomalt grade galenIQ 801 for dry granulation and following tableting is evaluated in this study. Isomalt alone, as well as a blend of equal parts with dibasic calcium phosphate, is roll compacted and tableted. Particle size distribution and flowability of the granules and friability and disintegration time of the tablets are determined Tensile strength of tablets is related to the specific compaction force during roll compaction and the tableting force. In all cases, the tensile strength increases with raising tableting forces. The specific compaction force has a different influence. For isomalt alone the tensile strength is highest for tablets made from granules prepared at 2 kN/cm and 6 kN/cm and decreases at higher values, i.e., >10 kN/cm. Tensile strength of the blend tablets is almost one third lower compared to the strongest tablets of pure isomalt. Friability of pure isomalt tablets is above the limit. Disintegration time is longest when the tensile strength is at its maximum and decreases with higher porosity and lower tensile strengths. Isomalt proves to be suitable for tableting after roll compaction. Even though the capacity as a binder might not be as high as of other excipients, it is a further alternative for the formulation scientist.

Pharmaceutics published new progress about Cohesion. 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, Name: (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.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sun, Tong published the artcileFreezing of Dilute Aqueous-Alcohol Nanodroplets: The Effect of Molecular Structure, Category: alcohols-buliding-blocks, the main research area is freezing alc nanodroplet mol structure property relationship.

We investigate vapor-liquid nucleation and subsequent freezing of aqueous-alc. nanodroplets containing 1-pentanol, 1-hexanol, and their 3-isomers. The aerosols are produced in a supersonic nozzle, where condensation and freezing are characterized by static pressure and Fourier transform IR (FTIR) spectroscopy measurements. At fixed water concentrations, the presence of alc. enables particle formation at higher temperatures since both the equilibrium vapor pressure above the critical clusters and the cluster interfacial free energy are decreased relative to the pure water case. The disappearance of a small free OH peak, observed for pure water droplets, when alcs. are added and shifts in the CH peaks as a function of alc. chain length reveal varying surface partitioning preferences of the alcs. Changes in the FTIR spectra during freezing, as well as changes in the ice component derived from self-modeling curve resolution anal., show that 1-hexanol and 1-pentanol perturb freezing less than their branched isomers do. This behavior may reflect the mol. footprints of the alcs., the available surface area of the droplets, and not only alc. solubility The presence of alcs. also lowers the freezing temperature relative to that of pure water, but when there is clear evidence for the formation of ice, the ice nucleation rates change by less than a factor of ~2-3 for all cases studied.

Journal of Physical Chemistry B published new progress about Clusters. 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

Yoshimura, Yukihiro published the artcileAn insight into the filling of the nanoheterogeneous structures of1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide by primary alcohols, COA of Formula: C8H18O, the main research area is ionic liquid alc hydrogen bond cluster Raman spectra conformation.

Mixtures of ionic liquids (ILs) with mol. cosolvents are attracting increased attention for the development of their technol. applications. As a result, understanding the interaction between the heterogeneous structure of ILs and mol. cosolvents at a microscopic level with the aim of fine-tuning the properties of ILs is of utmost importance. In this study, the local structure of the IL 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([bmim][TFSA]) in a series of mixtures of primary alc. (from methanol to 1-dodecanol) is investigated as a function of alc. concentration by Raman spectroscopy, providing a unique picture of the evolution of the local structure of alc. clusters formed in [bmim][TFSA]. The Raman spectra reveal the presence of various types of O-H species in the [bmim][TFSA]-alc. mixtures, with the major fractions corresponding to monomers at lower alc. concentrations Presented in this study is a plausible mechanism for the filling of the nanoheterogeneous structures of the [bmim][TFSA] matrix by alc. mols., revealing the occurrence of conformational changes in the bmim+ cation and TFSA- anion, which involves an increase of the population of the gauche and transoid conformers with alc. concentration Interestingly, the results show that the local structures of bmim+ and TFSA- cooperatively change along with the conformational change in the alc. mols. toward a smaller total volume

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yoshimura, Yukihiro published the artcileRaman investigation on the local structure of alcohols in 1-butyl-3-methylimidazolium tetrafluoroborate, Application In Synthesis of 111-87-5, the main research area is alc ionic liquid hydrogen bond cluster Raman spectra conformation.

In this study, we investigated the evolution of the local structure of a series of primary alcs. from methanol to octanol in 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) as a function of alc. concentration using Raman spectroscopy, with the aim of gaining more insight into the fundamentals of the compelling ionic liquid-mol. solvent interactions at mol. level. The Raman spectra revealed the presence of various types of O-H species in the mixtures, with the major fractions at low alc. concentration corresponding to monomers, which indicates that most of the alc. mols. are isolated from each other. A plausible picture for the changes in the local structures of alc. mols. loosely confined in the [bmim][BF4] matrix is presented, which suggests the occurrence of conformational changes in the bmim+ cation and the alc. mols. This observation may indicate a unique evolution of the local structure of alc. clusters formed in the ionic liquid

Journal of Molecular Liquids published new progress about Clusters. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application In Synthesis of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Khatouri, M. published the artcileSol/gel transition of oil/water microemulsions controlled by surface grafted triblock copolymer dodecyl-PEO227-dodecyl: molecular dynamics simulations with experimentally validated interaction potential, Recommanded Product: n-Octanol, the main research area is soluble gel transition microemulsion copolymer mol dynamic simulation.

We studied a large range of identical spherical oil/water microemulsion (O/W-MI) volume fractions. The O/W-MIs are stabilized by cetylpyridinium chloride ionic surfactant (CpCl) and octanol cosurfactant and dispersed in salt water. We grafted different numbers of dodecyl-(polyEthylene oxide)227-dodecyl triblock copolymer that we note (n(D-PEO227-D)), where n varies from 0 to 12. We accomplished the grafting process by replacing a small amount of CpCl and octanol with the appropriate n(D-PEO227-D). The aim is to determine the interaction/structure relationship of the covered microemulsions. Precisely, we are interested in a quant. investigation of the influence of volume fraction Φ, temperature (T), and n(D-PEO227-D) on the microemulsion sol/gel transition. To this end, we first study the uncoated microemulsion structure depending only on Φ. Second, we determine the coated microemulsions structure as a function of n(D-PEO227-D) for different Φ. Third, we examine the effect of temperature on the uncoated and coated microemulsion. We show that the sol/gel transition is controlled by the three main parameters, Φ, T, and n(D-PEO227-D). Accordingly, the uncoated microemulsion sol/gel transition, at ambient temperature, occurred for Φ ≃ 33.65%. By increasing Φ, the O/W-MIs show a glass state, which occurs, along with the gel state, at Φ ≃ 37% and arises clearly at Φ ≃ 60%. The coated O/W-MI sol/gel transition is found to be linearly dependent on n(D-PEO227-D) and takes place for Φ ≃ 26.5% for n(D-PEO227-D) = 12. Ordinarily, the decrease in temperature leads to gel formation of microemulsions for low Φ. Addnl., in this work, we found that the gelation temperature increases linearly with n(D-PEO227-D). Thus, the parameter n(D-PEO227-D) can control the sol/gel transition of the O/W-MIs at ambient temperature and moderate Φ.

RSC Advances published new progress about Clusters. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sharma, Manish published the artcileA significant increase in rhizosheath carboxylates and greater specific root length in response to terminal drought is associated with greater relative phosphorus acquisition in chickpea, HPLC of Formula: 97-67-6, the main research area is Cicer arietinum rhizosheath carboxylate root drought phosphorus.

We investigated the effects of water stress under low phosphorus (P) supply on P-acquisition by chickpea, and identified a genotype with faster relative growth and P-acquisition rates. We grew four genotypes in pots filled with a sand and soil mixture with a low P availability in a glasshouse. Plants were either well-watered or water-stressed, imposed at the reproductive stage. Plants were harvested when water-stressed plants fully closed their stomata. For all four genotypes, water stress reduced shoot and root growth, root mass ratio, and shoot P content, while it increased specific root length (except in ICC 456), water-use efficiency and the amount of rhizosheath carboxylates per g root dry weight A faster relative shoot P-acquisition rate in ICC 2884 was associated with a greater specific root length, a smaller mean root diameter and a greater increase in the amount of rhizosheath carboxylates in response to water stress under low P supply. Interestingly, under water stress ICC 2884 also maintained a similar physiol. P-use efficiency to that of the well-watered plants. ICC 2884 is recommended as a parental genotype in chickpea breeding programs to develop cultivars for low-P and terminal drought environments.

Plant and Soil published new progress about Chickpea. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, HPLC of Formula: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts