Month: December 2022

Garg, Mayank published the artcileSacrificial Cyclic Poly(phthalaldehyde) Templates for Low-Temperature Vascularization of Polymer Matrices, Application In Synthesis of 7575-23-7, the main research area is sacrificial cyclic polyphthalaldehyde template temperature vascularization polymer matrice.

Sacrificial polymers that depolymerize into small mols. upon exposure to an external stimulus facilitate the fabrication of synthetic structures with embedded vascular networks. Many sacrificial polymers such as poly(lactic acid) (PLA) and polycarbonates possess high thermal stability, leading to a time- and energy-intensive vascularization process. Furthermore, the use of these polymer templates is limited to high-temperature-resistant (>180°C) matrixes. Here, we demonstrate the rapid vascularization of a range of host matrixes through the thermally triggered depolymerization of cyclic poly(phthalaldehyde) (cPPA) at temperatures near 100°C. Complete mass loss of solvent-cast cPPA films is observed within 2 h at 100°C in a thermogravimetric analyzer and after embedding in poly(dicyclopentadiene) matrixes. The thermal processing of cPPA into sacrificial templates for inverse vascular architectures is hindered due to depolymerization at low temperatures We successfully overcome these templating challenges by using solution spinning and 3D printing to fabricate fibers and printed templates, resp. Microchannels are created inside lowglasstransition temperature (42 and 65°C) epoxy-based matrixes by depolymerizing the embedded fibers and printed templates within 1 h at 110°C. This low-temperature cPPA evacuation protocol enables the vascularization of matrixes that would not survive the harsh thermal cycle required for depolymerizing existing sacrificial polymers. Moreover, cPPA depolymerization affords a fivefold reduction in the thermal energy consumed during template removal compared to PLA.

ACS Applied Polymer Materials published new progress about Activation energy. 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

Zhao, Man published the artcileMixtures of octanol and an ionic liquid: Structure and transport, Recommanded Product: n-Octanol, the main research area is structure transport mixture octanol ionic liquid.

Ionic liquids (ILs) with long alkyl substituents are amphiphilic, which leads to a bicontinuous liquid structure. The strongly interacting anionic and cationic head groups form a long range charge network, with the hydrocarbon tails forming a nonpolar domain. Such nonpolar domains have been shown to dissolve a variety of neutral organic solvents. In mixtures of ILs with solvents the neutral organic mols. residing in the nonpolar domains experience different environments and friction from the charged cations and anions. Thus, the neutral mols. diffuse much faster than predicted by hydrodynamic scaling using the average viscosity of the mixture In this work, we report studies on the structure and transport properties of mixtures of 1-octanol with the IL trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide (P6,6,6,14+/NTf2-). The majority of the atom fraction in the P6,6,6,14+ cation comprises four hydrocarbon substituents. The unique amphiphilic nature of ILs with the P6,6,6,14+ cation makes 1-octanol fully miscible with the IL at ambient temperatures X-ray scattering experiments show that the IL structure persists in the mixtures for 1-octanol mole fractions as large as xoct = 0.90. The self-diffusion coefficients of the three mol. species in the mixtures were measured by NMR experiments The self-diffusion of the P6,6,6,14+ cation is well described by the Stokes-Einstein equation, while the diffusivity of the NTf2- anion is slightly lower than the hydrodynamic prediction. The measured diffusivities of octanol in these mixtures are 1.3-4 times higher than the hydrodynamic predictions. (c) 2020 American Institute of Physics.

Journal of Chemical Physics published new progress about Activation energy. 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

Morris, Danny S. published the artcileDeoxydehydration of vicinal diols and polyols catalyzed by pyridinium perrhenate salts, Name: 1-(4-Bromophenyl)ethane-1,2-diol, the main research area is vicinal diol polyol pyridinium perrhenate deoxydehydration catalyst; alkene preparation.

Simple ammonium and pyridinium perrhenate salts were evaluated as catalysts for the deoxydehydration (DODH) of diols into alkenes. Pyridinium perrhenates were found to be effective catalysts at much lower temperatures than those in previous reports, outperforming primary, secondary, and tertiary ammonium salts, while quaternary ammonium salts are effectively inactive. The mechanism of reaction was studied computationally using DFT calculations which indicate that proton shuttling between the ion pair is intrinsic to the mechanism and that the reduction of rhenium by the phosphine occurs before the diol condensation.

Catalysis Science & Technology published new progress about Activation energy. 92093-23-7 belongs to class alcohols-buliding-blocks, name is 1-(4-Bromophenyl)ethane-1,2-diol, and the molecular formula is C8H9BrO2, Name: 1-(4-Bromophenyl)ethane-1,2-diol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Deng, Kuirong published the artcileFlame-retardant single-ion conducting polymer electrolytes based on anion acceptors for high-safety lithium metal batteries, Computed Properties of 7575-23-7, the main research area is conducting polymer electrolyte anion acceptor lithium metal battery.

Solid-state lithium metal batteries (LMBs) assembled with polymer electrolytes (PEs) and lithium metal anodes are promising batteries owing to their enhanced safety and ultrahigh theor. energy densities. Nevertheless, polymer electrolytes (PEs) suffer from low ionic conductivities, low lithium-ion transference numbers (LITNs) and high flammability. To address these issues, a novel nonflammable single-ion conducting polymer electrolyte (AEP) with ultrahigh ionic conductivity, unity LITN, excellent flame retardance and high flexibility has been developed. Allylboronic acid pinacol ester (AAPE) is incorporated into the 3D crosslinking network of AEP to act as the anion acceptor that traps the anions, improving the LITN to 0.79. AEP possesses an ultrahigh ionic conductivity of 2.52 mS cm-1 at 25°C. AEP cannot be ignited by flame. AEP can construct robust LiF-rich SEIs on lithium metal anodes and effectively suppress dendrite growth. LiFePO4 cells assembled with AEP demonstrate excellent rate capacity (specific capacity of 112.4 mA h g-1 at 5C rate) and long-term cycling stability (93.2% capacity retention after 500 cycles). This work provides a promising approach to prepare new PEs for high-safety, high-stability and high-energy LMBs.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Activation energy. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xiang, Hongping published the artcilePhoto-crosslinkable, self-healable and reprocessable rubbers, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is photocrosslinking self healing reprocessable butadiene rubber polysulfide.

As a proof of concept, this study reports a facile method to prepare photo-crosslinkable, self-healable and reprocessable rubbers, which are rapidly crosslinked and patterned variform products via thiol-ene photoclick polymerization between the double bonds in polybutadiene and thiols in polysulfide. Disulfide linkages in polysulfide can dynamically rearrange the crosslinked networks through UV irradiation activated disulfide metathesis. The model small mol. experiments prove that disulfide metathesis is efficiently promoted by UV light and inclines to second-order reaction. The stress of photo-crosslinked rubbers is almost completely relaxed under UV irradiation at higher than 25 mW/cm2. More interestingly, stress relaxation can be controlled by sequentially turning on/off UV light. The self-adhesion assisted self-healing property is revealed by repeated tensile shear tests. The content of disulfide bonds, transmittance, irradiation intensity and time have a synergistic effect on the self-healing ability. The healed samples can regain higher than 90% shear strength, and the efficiency is not significantly influenced by repeated healing. Due to the dynamic reversibility of disulfide metathesis, the molded rubbers can be transformed into other shapes under UV illumination. Moreover, the pulverized rubber can also be compressed into new items by means of UV induced disulfide metathesis. This study thus illustrates a feasible approach to endow photo-cured rubbers with UV triggered self-healing and reprocessing capacities.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Activation energy. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ke, Jingxuan published the artcileOptimization, characterization and rheological behavior study of pectin extracted from chayote (Sechium edule) using ultrasound assisted method, Formula: C6H12O6, the main research area is Sechium pectin rheol ultrasound assisted method; Chayote; Functional properties; Pectin; Rheological properties; Ultrasound assisted extraction.

Pectin is one of high-value functional food ingredients. Better knowledge of properties of chayote pectin would help to promote the application of the chayote as a pectin source. In this study, ultrasound-assisted extraction (UAE) was used to extract chayote pectin. The extraction parameters were optimized by a Box-Behnken response surface design. The highest yield (6.19%) was obtained at a liquid/solid ratio of 50 mL/g, ultrasonic temperature of 70°C and ultrasonic time of 40 min as optimized extraction conditions. The chem. properties, spectral information and rheol. properties of pectin extracted with UAE under the optimum conditions (PEUO) were measured and the results indicated that the PEUO exhibited a low degree of esterification, high molar mass (2.47 × 106 g/mol) and suitable foaming capacity. The PEUO featured a stronger antioxidant capacity compared to com. apple pectin and the PEUO solutions (1%, 2%, 3% and 5%) showed a non-Newtonian behavior. Hence, PEUO may provide beneficial characteristics to find use in food industry.

International Journal of Biological Macromolecules published new progress about Acoustic ablation. 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, Formula: C6H12O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Katagiri, Mayu published the artcileMagneto-Plasmonic Co@Pt@Au Nanocrystals for Biosensing and Therapeutics, Name: n-Octanol, the main research area is magnetism plasmon resonance cobalt platinum gold nanocrystal biosensor therapeutic.

Multifunctional nanoparticles (NPs) exhibiting high magnetic property and plasmonic resonance are expected to be advanced nanomaterials which enable therapy, detection, and diagnosis simultaneously for medical applications. To achieve the practical performance of the multifunctional NPs, the precise design and synthesis are both required. In this work, considering the chem. stability and controllability, Co-Pt@Au core-shell NPs, which exhibit high magnetic property and plasmonic resonance, were theor. designed based on calculation and then exptl. synthesized using an alc. reduction method. Co-Pt NPs were uniformly synthesized using a technique which enables reduction control of Pt through the formation of a Pt-oleylamine complex. Moreover, depending on the Co/Pt ratio, the distribution of Co and Pt in a nanoparticle was precisely controlled, and as a result, Co-Pt alloy and Co@Pt core-shell NPs were individually prepared In particular, Co@Pt NPs exhibit a high magnetic property and are suitable for Au coating due to a small lattice mismatch. In fact, Au coating onto Co@Pt NPs was successfully performed via inhomogeneous nucleation, which results in Co@Pt@Au NPs exhibiting plasmonic response of Au with high magnetic property and being dispersed in water by ligand exchange for in vivo use. The developed synthetic method enables designed synthesis of complicated multicomponent nanoparticles through tunable reduction reaction and provides highly potential NPs for transport and sensing applications.

ACS Applied Nano Materials published new progress about Magnetic materials. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ma, Huali published the artcileIn Situ Self-Assembly of Ultrastable Crosslinked Luminescent Gold Nanoparticle and Organic Dye Nanohybrids toward Ultrasensitive and Reversible Ratiometric Thermal Imaging, Computed Properties of 7575-23-7, the main research area is crosslinked luminescent gold nanoparticle organic dye nanohybrid thermal imaging.

Exploring hybrid nanomaterials with sensitive and reversible ratiometric temperature sensing is highly desirable but still challenging. Herein, using thermosensitive Pluronic F127 as template, a facile and straightforward approach is presented for one-pot synthesis of dual-emitting nanohybrids of crosslinked gold nanoparticle (AuNP) and organic dye with unique core-shell structure and excellent stability, which can be utilized as an ultrasensitive and reversible ratiometric temperature sensor. The dual-emitting nanohybrids are achieved through in situ self-assembly of red-emitting AuNPs in the hydrophobic core, along with doping blue-emitting and polarity-responsive hydrophobic dye 4,4′-bis(2-benzoxazolyl) stilbene (BBS). The AuNP and BBS nanohybrids (AuNP-BBS nanohybrids) consist of about ten crosslinked ultrasmall AuNPs in the hydrophobic core. The crosslinking interaction between multidentate thiol ligand and ultrasmall AuNPs offers remarkable stability without dye leakage, while the thermosensitive Pluronic F127 endows the nanohybrids with two reverse signal responses toward temperature By virtue of the excellent features, the dual-emitting AuNP-BBS nanohybrids can be capable of ratiometric sensing of temperature with remarkable reversibility and high sensitivity (0.3396°C-1), and enable visual temperature measurements by the naked eye and pseudocolor imaging. These findings provide a useful guidance for preparing uniform hybrid nanomaterials with remarkable stability and desired functions.

Advanced Optical Materials published new progress about Fluorescence decay. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Xiaoying published the artcileSolubility Determination and Thermodynamic Modeling of Buprofezin in Different Solvents and Mixing Properties of Solutions, Computed Properties of 111-87-5, the main research area is solubility thermodn model buprofezin solvent property solution.

In this work, the equilibrium solubility of buprofezin in different pure solvents was determined The mole solubility of buprofezin in these studied pure solvents increased with increasing temperature The solubility data decreased according to the following order: toluene > Et acetate > DMF > acetone > 1-octanol > 1-butanol > n-propanol > acetonitrile > isopropanol > ethanol > methanol > water. The results were correlated with four thermodn. models (the modified Apelblat equation, λh equation, NRTL model, and Wilson model), and the values of root-mean-square deviation (RMSD) and relative average deviation (RAD) are no >27.26 × 10-4 and 2.76%, resp. Due to the maximum values of RAD and RMSD were 1.58% and 3.77 × 10-4 in modified Apelblat equation, which indicate that it is a suitable model to describe the results. Besides, the mixing Gibbs energy, mixing enthalpy, and mixing entropy were computed. The values of ΔmixG are neg. in this experiment; therefore, the dissolution process is a spontaneous and favorable process, and the ΔmixS are all pos., which indicate the dissolving process is entropy favorable as well.

Journal of Chemical & Engineering Data published new progress about Excess free energy. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Computed Properties of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tahka, Sari published the artcileImmobilization of proteolytic enzymes on replica-molded thiol-ene micropillar reactors via thiol-gold interaction, Synthetic Route of 7575-23-7, the main research area is chymotrypsin immobilization micropillar reactor; Enzyme immobilization; Gold nanoparticles; Mass spectrometry; Microfluidics; Microreactors; Thiol-enes.

We introduce rapid replica molding of ordered, high-aspect-ratio, thiol-ene micropillar arrays for implementation of microfluidic immobilized enzyme reactors (IMERs). By exploiting the abundance of free surface thiols of off-stoichiometric thiol-ene compositions, we were able to functionalize the native thiol-ene micropillars with gold nanoparticles (GNPs) and these with proteolytic α-chymotrypsin (CHT) via thiol-gold interaction. The micropillar arrays were replicated via PDMS soft lithog., which facilitated thiol-ene curing without the photoinitiators, and thus straightforward bonding and good control over the surface chem. (number of free surface thiols). The specificity of thiol-gold interaction was demonstrated over allyl-rich thiol-ene surfaces and the robustness of the CHT-IMERs at different flow rates and reaction temperatures using bradykinin hydrolysis as the model reaction. The product conversion rate was shown to increase as a function of decreasing flow rate (increasing residence time) and upon heating of the IMER to physiol. temperature Owing to the effective enzyme immobilization onto the micropillar array by GNPs, no further purification of the reaction solution was required prior to mass spectrometric detection of the bradykinin hydrolysis products and no clogging problems, commonly associated with conventional capillary packings, were observed The activity of the IMER remained stable for at least 1.5 h (continuous use), suggesting that the developed protocol may provide a robust, new approach to implementation of IMER technol. for proteomics research. [Figure not available: see fulltext.].

Analytical and Bioanalytical Chemistry published new progress about Enzymic hydrolysis. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Synthetic Route of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts