Month: December 2022

Haque, Najirul published the artcileZn(II)-Embedded Nanoporous Covalent Organic Frameworks for Catalytic Conversion of CO2 under Solvent-Free Conditions, Recommanded Product: 3,5-Dimethylhex-1-yn-3-ol, the main research area is zinc embedded nanoporous covalent organic framework catalytic conversion CO2.

Covalent organic frameworks (COFs) have been gaining substantial attention over the past decade due to their developing crystalline porous polymeric nature linked by strong covalent bonds and widespread applications in various fields. Currently, three-dimensional COFs (3D COFs) are engaging the spotlight due to their distinctive porous features, greater surface area, and exceptional performances in comparison with formerly published two-dimensional (2D) frameworks with the AA-stacking layered mode. In this paper, we present, for the first time, a nanoporous 3D-COF-based zinc(II) catalyst (Zn@RIO-1), which shows an efficient pathway for the chem. conversion of carbon dioxide to produce α-alkylidene cyclic carbonates and oxazolidinones from propargylic alcs. The microporous material with a high surface area (312.61 m2/g) facilitates both types of catalytic reactions under atm. CO2 pressure. More importantly, easily recyclable and reusable catalysts produced moderate to high yields of desired carbonates as well as oxazolidinone products under solvent-free conditions. This study emphasizes the capability of nanoporous 3D-COF-based material in the catalysis field, more specifically in the field of CO2 capture and chem. fixation to fine chems. These results pave a spectacular pathway for the chem. fixation of CO2 into α-alkylidene cyclic carbonates and oxazolidinones from propargylic alcs. using 3D-COF as a potential heterogeneous ligand under sustainable conditions (i.e., solvent-free).

ACS Applied Nano Materials published new progress about Adsorption. 107-54-0 belongs to class alcohols-buliding-blocks, name is 3,5-Dimethylhex-1-yn-3-ol, and the molecular formula is C8H14O, Recommanded Product: 3,5-Dimethylhex-1-yn-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Esen, Cansu published the artcileThiol-ene polymer beads via liquid-liquid printing: armored interfaces and photopolymerization via graphitic carbon nitride, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is carbon nitride polymer bead thiol ene photopolymerization.

Polymerization of multifunctional thiol-ene mols. is attractive as a proof of concept in photopolymerization, yet the formation of a bead structure is highly restricted. This manuscript will show graphitic carbon nitride based liquid-liquid printing and subsequent photopolymerization to form thiol-ene polymer beads with extreme simplicity and potential scalability.

Nanoscale Advances published new progress about Adsorption. 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

Lone, Irfan H. published the artcileQuenching assisted reverse micellar synthesis and electrical properties of high surface area BiFeO3 nanoparticles, COA of Formula: C8H18O, the main research area is bismuth iron oxide nanoparticle quenching elec property.

Multiferroic compounds are prime important materials for future electronic and magnetic devices and overcome the fundamental limits of conventional materials. In present work, we reported the preparation of purely one phase of nano-sized BiFeO3 compound by microemulsion micellar method for the first time by employing rapid quenching of sample at 500°C, that is the main driving force to get the pure phase of BiFeO3 nanoparticles at low temperature method. The nanoparticles that we obtained were almost uniform with sphere shaped and these prepare nanoparticles possess high surface. The increase in permittivity in the form of dielec. constants were reported that depends on temperature and frequency that supports the ferroelec. nature and was further confirmed by the ferroelec. loops even at the room temperature has been found in theses prepared nanoparticles.

Journal of Nanoscience and Nanotechnology published new progress about Adsorption. 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

Samanta, Archana published the artcileCharge Regulated Diffusion of Silica Nanoparticles into Wood for Flame Retardant Transparent Wood, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is flame retardant transparent silica nanoparticle wood polymer biocomposite property.

The preparation of wood substrates modified by charged inorganic nanoparticles (NPs) diffusing into the internal cell wall structure is investigated for generating functional properties. The flammability problem of wood biocomposites is addressed. NPs applied from colloidal sols carry charge to stabilize them against aggregation. The influence of charge on particle diffusion and adsorption should play a role for their spatial distribution and localization in the wood substrate biocomposite. It is hypothesized that improved dispersion, infiltration, and stability of NPs into the wood structure can be achieved by charge control diffusion, also restricting NP agglomeration and limiting distribution to the wood cell wall. Cationic and anionic silica NPs of ≈30 nm are therefore allowed to diffuse into bleached wood. The influence of charge on distribution in wood is investigated as a function of initial sol concentration Transparent wood is fabricated by in situ polymerization of a thiol-ene in the wood pore space. These biocomposites demonstrate excellent flame retardancy with self-extinguishing characteristics. The approach has potential for com. fabrication of flame retardant transparent composites for glazing and other building applications.

Advanced Sustainable Systems published new progress about Adsorption. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mortazavian, Hamid published the artcileUnderstanding the role of shape and composition of star-shaped polymers and their ability to both bind and prevent bacteria attachment on oral relevant surfaces, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is star shaped polymer bind bacteria attachment oral relevant surface; acrylic acid; antibacterial; antifouling; composition; dental; hydrophobicity; hydroxyapatite; oral; polymer; star-shaped.

In this study, we have prepared a series of 4- and 6-arm star-shaped polymers with varying mol. weight and hydrophobicity in order to provide insight into the role and relationship that shape and composition have on the binding and protecting of oral relevant surfaces (hydroxyapatite, HAP) from bacteria colonization. Star-shaped acrylic acid polymers were prepared by free-radical polymerization in the presence of chain transfer agents with thiol groups, and their binding to the HAP surfaces and subsequent bacteria repulsion was measured. We observed that binding was dependent on both polymer shape and hydrophobicity (star vs. linear), but their relative efficacy to reduce oral bacteria attachment from surfaces was dependent on their hydrophobicity only. We further measured the macroscopic effects of these materials to modify the mucin-coated HAP surfaces through contact angle experiments; the degree of angle change was dependent on the relative hydrophobicity of the materials suggesting future in vivo efficacy. The results from this study highlight that star-shaped polymers represent a new material platform for the development of dental applications to control bacterial adhesion which can lead to tooth decay, with various compositional and structural aspects of materials being vital to effectively design oral care products.

Journal of Functional Biomaterials published new progress about Adsorption. 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

Bertanza, Giorgio published the artcileRemoval of perfluoroalkyl substances in drinking water treatment plant, Category: alcohols-buliding-blocks, the main research area is perfluoroalkyl polyfluoroalkyl drinking water treatment plant groundwater pollution control; Activated carbon; Adsorption capacity; Breakthrough; Groundwater; PFAS.

Drinking water contamination by perfluoroalkyl and polyfluoroalkyl substances (PFASs) is an issue of relatively recent concern. The literature indicates that anion exchange resins and granular activated carbon (GAC) are suitable technologies for removing these compounds While several laboratory-scale and pilot-scale experiments have been conducted to study activated carbon adsorption/desorption mechanisms of a number of PFASs, little data on full-scale plants are available. This work examines a real case of groundwater contamination by PFASs in an area of approx. 200 km2. The performance of the main drinking water treatment plant in the area (flowrate = 30,000 m3/d; 100,000 people served), which is equipped with GAC filters, was analyzed. Approx. 17,000 anal. data points from a working period of five years were processed. Perfluorobutyric acid (PFBA) was the first compound to attain breakthrough, followed by perfluoropentanoic acid, perfluorohexanoic acid, perfluorobutanesulfonic acid, and perfluorooctanoic acid (PFOA). The adsorption capacity and treated bed volumes at complete breakthrough (saturation) were calculated, and ranged from 1.71 g/t and 7100 (PFBA) to 24.6 g/t and 50,900 (PFOA), with the total organic carbon concentration in the groundwater ranging from <0.1 to 0.5 mg/L. The overall adsorption capacity was approx. 40 g of total PFASs/t. The breakthrough behavior of PFASs was correlated with the C-F chain length, the type of hydrophilic head (either carboxyl or sulfonic), and the n-octanol/water partition coefficients logP and logD. The results corroborate the findings of previously published bench-scale and pilot-scale experiments Science of the Total Environment published new progress about Adsorption. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Xin published the artcilePolydimethylsiloxane/ionic liquid sponge used in headspace solid-phase extraction coupled with GC-MS for rapid analysis of essential oil in lavender, HPLC of Formula: 124-76-5, the main research area is essential oil lavender solid phase extraction polydimethylsiloxane analysis; GC-MS; ionic liquid; lavender essential oil; polydimethylsiloxane; solid-phase extraction.

A headspace (HS) solid-phase extraction (SPE) based on polydimethylsiloxane (PDMS)/ionic liquid (IL) sponge was developed for the extraction of lavender essential oil. The PDMS after loading of 1-butyl-3-methylimidazolium tetrachloroferrate ([BMIM]FeCl4) with a high surface area and excellent adsorption capacity was successfully applied in the SPE process. Microwave distillation (MD) coupled with HS-PDMS/[BMIM]FeCl4 extraction after GC-MS was proposed. Various exptl. parameters were studied. The optimal conditions were as follows: optimal IL, [BMIM]FeCl4; volume ratio of IL to ethanol, 1:5; extraction solvent, n-hexane; microwave power, 600 W; and irradiation time, 12 min. The limits of detection and quantification of the analytic compounds were in the ranges 4.00-16.32 and 10.00-40.00 ng, resp. The intra-day and inter-day precisions were in the ranges 0.37-1.94% and 1.20-2.45%, resp. Under the optimized conditions, 13 samples of 3 lavender varieties were analyzed, and 40 compounds were identified. Lavender varieties were distinguished using principal component anal. The results showed that MD-HS-PDMS/IL-GC-MS is a novel, simple, and sensitive method for the determination of essential oil in complex plant samples.

Biomedical Chromatography published new progress about Adsorption. 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, HPLC of Formula: 124-76-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Haney, Bobby published the artcileStimuli responsive Janus microgels with convertible hydrophilicity for controlled emulsion destabilization, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is Janus microgel stimulus hydrophilicity emulsion destabilization.

Although the utilization of rigid particles can afford stable emulsions, some applications require eventual emulsion destabilization to release contents captured in the particle-covered droplet. This destabilizing effect is achieved when using stabilizers that respond to controlled changes in environment. Microgels can be synthesized as stimuli responsive polymeric gel networks that adsorb to oil/water interfaces and stabilize emulsions. These particles are commonly hydrogels that swell and collapse in water in response to environmental changes. However, amphiphilic functionality is desired to enhance the adsorption abilities of these hydrogels while maintaining their stimuli responsivity. Microfluidic techniques are used to synthesize Janus microgels with two opposing stimuli responsive hemispheres. The particles have a temperature responsive domain connected to a pH responsive network where each side changes its hydrophilicity in response to a change in temperature or pH, resp. The Janus microgels are amphiphilic in acidic conditions at 19 °C and alk. conditions at 40 °C, while the opposite conditions cause a reduction of the amphiphilicity. By stabilizing emulsions with these dual responsive microgels, “”smart”” droplets that respond to environmental cues are formed. Emulsion droplets remain stable with smaller diameters when aqueous solution conditions favor amphiphilic particles yet, coalesce to larger droplets upon changing pH or temperature

Soft Matter published new progress about Adsorption. 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

Zhang, Yang published the artcileHighly selective and sensitive probes for the detection of Cr(VI) in aqueous solutions using diglycolic acid-functionalized Au nanoparticles, Formula: C4H6O5, the main research area is diglycolic acid functionalized gold nanoparticle probe synthesis chromium detection.

In this study, a variety of diglycolic acid-functionalized gold nanoparticle (Au NP) probes are reported, which are highly sensitive for the detection of chromium ions, Cr(VI) ions, at low concentrations in aqueous solutions based on the application of surface plasmon resonance (SPR) theory. Due to its outstanding affinity for Cr(VI) ions, the capped diglycolic acid would induce the aggregation of the NP probes upon encountering them; this was evidenced by the obvious red-shifting of the SPR peak and the enlarged size of the NPs. For the same reason, the selectivity of the probe for Cr(VI) against other heavy metal ions was found to be remarkable. Under optimized conditions, the probe showed the limit of detection (LOD) of 0.32 ppb for Cr(VI) and a linear detection scale ranging from 0.32 ppb to 0.1 ppm. To the best of our knowledge, this is probably the lowest LOD reported for Cr(VI) detection among those of the methods based on SPR.

RSC Advances published new progress about Adsorption. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Formula: C4H6O5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zusman, Ofri B. published the artcileDissolved organic matter adsorption from surface waters by granular composites versus granular activated carbon columns: An applicable approach, Quality Control of 111-87-5, the main research area is dissolved organic matter granular activated carbon adsorption water treatment; Dissolved organic matter; Filtration; Granules; Polymer-clay composite; Surface water.

Many new sorbents have been introduced as an alternative for granular activated carbon (GAC), the most common sorbent for dissolved organic matter (DOM) removal. In the current study, we developed an applicable granular composite based on a flocculant commonly employed for drinking water treatment adsorbed to montmorillonite. DOM adsorption from surface waters, Lake Kinneret and Suwannee River, with low and high specific UV absorption (SUVA), resp., by composite and GAC columns, was studied. Adsorption of DOM from Suwannee River was significantly higher by the composite column, in comparison to the GAC column. In-situ regeneration of the columns with a brine solution was extremely efficient and inefficient for the composite and GAC columns, resp. Adsorption, of both waters, post-regeneration by the composite column was not compromised, while GAC effectiveness decreased. The opposite trend in DOM adsorption from Suwannee River and Lake Kinneret was explained by the different affinities of the sorbents towards various DOM mols. Distinguishing between different DOM components adsorbed by GAC and the composite was supported by 13C NMR and direct pyrolysis-GC-MS measurements. Furthermore, since DOM removal by GAC and by the composite, increases, and decreases with temperature, resp., the integrated column, mitigates the changes in removal, stabilizing the adsorption performance. Such an integrated filter may minimize addnl. seasonal and water quality fluctuations.

Water Research published new progress about Adsorption. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Quality Control of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts