Author: tianli

Zhang, Jiancheng published the artcilePreparation of novel UV-cured methacrylate hybrid materials with high thermal stability via thiol-ene photopolymerization, COA of Formula: C17H28O8S4, the main research area is POSS methacrylate thiol ene click reaction photocuring thermomech property.

Methacryloxypropyl-polyhedral oligomeric silsesquioxane (MAP-POSS) was photopolymerized with the tri- or tetra-functional thiol monomer in different stoichiometry. A novel inorganic-organic methacrylate hybrid material with highly cross-linked network and high performance was synthesized by UV-initiated thiol-ene click chem. SEM-EDAX images and XRD diffractograms showed that no agglomeration of MAP-POSS was observed, indicating MAP-POSS dispersed uniformly in the hybrid materials. Real-time FTIR was employed to monitor the conversion of thiol and methacrylate as a function of irradiation time, and highly thiolated monomer could promote the conversion of methacrylate effectively because of stronger chain propagation capability. The TGA indicated that the hybrid materials had high thermal stability of which the onset decomposition temperature rose to 350°, ∼50° higher than that of the traditional UV-cured epoxy acrylate/triethylene glycol dimethacrylate (EA/TEGDMA, 70:30 weight/weight) resin. The highest glass transition temperature (Tg) of the hybrid materials was 76.2°. Compared with traditional EA/TEGDMA resins, the novel hybrid materials consisted of MAP-POSS had fast curing rate, high mech. properties and thermal stability which made the wider practical applications of UV-cured hybrid materials feasible.

Journal of Materials Science published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, COA of Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jia, Yaya published the artcileHigh refractive index polythiourethane networks with high mechanical property via thiol-isocyanate click reaction, Computed Properties of 7575-23-7, the main research area is polythiourethane thiol isocyanate click reaction refractive index.

High refractive index polymers (HRIPs), especially sulfur-containing HRIPs, play an important role in optical materials; particularly the thermosetting sulfur-containing polyurethane is widely used in optical lenses. To understand the effect of thiol and isocyanate structures on thermosetting polythiourethane properties, a comprehensive study of the basic thermal, optical and mech. properties of the obtained polythiourethane network structure was conducted, which results indicated that in addition to functionality and the presence of rigid groups affect the glass transition temperature, the conjugation effect and steric hindrance effect in the structure can also cause more changes in the glass transition temperature All polythiourethane materials formed uniform and densely crosslinked network structures. Due to the introduction of highly polarizable sulfur atoms in 2,3-bis((2-mercaptoethyl)thio)-1-propanethiol (GST) and benzene rings in bis(isocyanatomethyl)benzene (XDI), the resulting polythiourethanes exhibited a high refractive index of 1.6559 (589 nm) and a tensile strength of 95.64 MPa while the Abbe’s number was 33.24, fully meeting the lens requirements. The important structure-property relationships of polythiourethane will be helpful for the rational design of HRIPs.

Polymer published new progress about Click chemistry. 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

Wang, Zhengyue published the artcileUV-curable self-healing polyurethane coating based on thiol-ene and Diels-Alder double click reactions, COA of Formula: C17H28O8S4, the main research area is polyurethane acrylate UV curable self healing coating click reaction.

Endowing UV-curable coatings with self-healing properties by incorporating dynamic bonds into their crosslinking network is of vital significance. However, in practical applications, self-healing polymers are often plagued with problems such as a high healing temperature and long healing time. To address this challenge, we developed a new type of UV-curable polyurethane coating by the combination of Diels-Alder and thiol-ene click reactions. The Diels-Alder bonds in the polyurethane samples developed in this work furnished perfect mech. properties and self-healing ability. Self-healing of polyurethane based on Diels-Alder bonds usually occurs at 120°C. Thiol-ene click reaction is a robust, novel polymerization method, and it improved the structural performance of the polymer with a more homogeneous structure being formed than that achieved with traditional UV-curing. Herein, a novel UV-curable self-healing coating, which is referred to as a PU-SH system, was designed by integrating thiol-ene into polyurethane resins containing Diels-Alder bonds. Results of analyses by assorted techniques (including Fourier-transform IR spectroscopy, different scanning calorimetry, rheol., optical microscopy, and 3D optical interferometric profilometry) strongly indicated that the self-healing ability of the prepared coatings is superior to those of previously studied traditional UV-curing coatings, which are referred to as PU systems. The resultant coatings of the PU-SH system showed a remarkable reduction in the healing temperature from 120°C for the PU system to 90°C. The rapid scratch-healing properties of the UV-curable coatings, taken together with the moderate healing temperature makes the material attractive for a variety of applications, such as in flexible electronic screens, car paint film, and aircraft interior finishes.

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Wanjing published the artcileNovel UV-curable epoxy resins modified with alkyne: Cured through thiol-yne click reaction, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is UV curable epoxy resin alkyne thiol yne click reaction; photocrosslinking dynamic thermal dielec phys property.

With the development of light-curing resin inks, various types of unsaturated resins modified with alkene have been reported in recent years. In this present work, however, the use of reactive monomers containing carbon-carbon triple bonds to react with epoxy resin was proposed to synthesize unsaturated resins modified with alkyne, and then to explore the potential applicability of alkyne groups in photocurable resins. Therefore, propargylic acid and 2-butynoic acid were resp. used to introduce unsaturation by ring-opening reaction with epoxy groups, while the hydroxyl groups generated by previous reaction were used to introduce carboxyl groups by reaction with 1,2,5,6-tetrahydrophthalic anhydride to obtain the final alkyne-modified resins. Considering the highly efficient reactivity of thiol-yne click chem., the triple bond conversion of photocurable resins with and without thiol addition were prepared and compared to investigate the photosensitivity of them. It was found that resins modified with propargylic acid showed more photosensitivity and resins with thiol addition exhibited excellent triple bond conversion (the highest is nearly 100 %), meanwhile, in this study, thermal and dielec. properties of two alkyne-modified resins with different component additions were also tested and discussed.

Progress in Organic Coatings published new progress about Click chemistry. 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

Jeske, Madelyn P. published the artcileTwo-Photon Printing of Shape-Memory Microstructures and Metasurfaces via Radical-Mediated Thiol-Vinyl Hydrothiolation, Synthetic Route of 7575-23-7, the main research area is photon printing shape memory metasurface radical thiol vinyl hydrothiolation.

Shape-memory resists capable of high-resolution curing into arbitrarily designed structures are increasingly demanded for soft robotics, optical sensors, microscale manufacturing, and biomedicine. Amorphous, shape-memory thiol-vinyl networks are printed using two-photon polymerization (2PP) curing of a simple resin formulated with com. available reagents. The ability to print high-resolution feature sizes down to 200 nm is attributed to the use of radical-mediated, thiol-vinyl step-growth polymerization that quickly crosslinks the resin, limiting diffusive transport. The thermomech. behavior of the 2PP-cured material analyzed in compression, tension, and three-point bending is similar to the behavior of the UV-polymerized samples. To demonstrate the ability to design, field, and test 4D responsive microstructures, an array of nine springs with coil diameters of 330μm is printed. Following compressive shape-fixing, printed arrays can release 11μJ of stored elastic strain energy when reheated. Further, a new concept of dichroic-memory of a metamaterial device is demonstrated by printing a twisted woodpile structure with CD as characterized by Mueller Matrix ellipsometry. The results of this study demonstrate how combining high-resolution 2PP curing with stimuli-responsive mol. architectures can further the engineering of responsive microstructures and metamaterials.

Advanced Materials Technologies (Weinheim, Germany) published new progress about Click chemistry. 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

Api, A. M. published the artcileResearch Institute for Fragrance Materials fragrance ingredient safety assessment, 2-Hydroxy-α,α,4-trimethylcyclohexanemethanol, CAS Registry Number 42822-86-6, Category: alcohols-buliding-blocks, the main research area is RIFM fragrance ingredient safety hydroxytrimethylcyclohexanemethanol.

Research Institute for Fragrance Materials (RIFM)’s Expert Panel concludes that this material is safe under the limits described in this safety assessment. This material was evaluated for genotoxicity, repeated dose toxicity, developmental toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity, skin sensitization, as well as environmental safety.

Food and Chemical Toxicology published new progress about Chemical safety. 42822-86-6 belongs to class alcohols-buliding-blocks, name is 2-(2-Hydroxypropan-2-yl)-5-methylcyclohexanol, and the molecular formula is C10H20O2, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xie, Fan published the artcileStructural characteristics of tamarind seed polysaccharides treated by high-pressure homogenization and their effects on physicochemical properties of corn starch, Formula: C6H12O6, the main research area is tamarind seed corn starch polysaccharide physicochem property; Freeze-thaw stability; Pasting properties; Structural characteristics; Tamarind seed polysaccharides modification.

In this work, structural characteristics of TSPs treated by high-pressure homogenization (HPH) and their effects on physicochem. properties of corn starch were analyzed. HPH induced monosaccharides change, Gal/Glc ratio decrease from 0.32 to 0.25, and mol. weight (Mw) decrease from 10.55 to 4.47 x 105 Da through damaging glycosidic linkages in the backbone and side-chain of TSPs. Furthermore, 90 MPa homogenized TSP (higher Gal removal) showed inhibitory effects on starch paste retrogradation, and TSPs with a lower Mw (homogenized at 60 and 90 MPa) could limit water precipitation during the long-term storage. Moreover, Mw and Gal/Glc ratio were the major factors for the determined effects of TSPs on physicochem. properties of corn starch. The results could provide new insights into the relationship between TSP structure and their effects on the physicochem. properties of starch.

Carbohydrate Polymers published new progress about Cell morphology. 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

Tiziani, Raphael published the artcilePhosphorus deficiency changes carbon isotope fractionation and triggers exudate reacquisition in tomato plants, SDS of cas: 97-67-6, the main research area is tomato plant phosphorus deficiency carbon isotope fractionation exudate reacquisition.

Plant roots are able to exude vast amounts of metabolites into the rhizosphere in response to phosphorus (P) deficiency. Causing noteworthy costs in terms of energy and carbon (C) for the plants. Therefore, it is suggested that exudates reacquisition by roots could represent an energy saving strategy of plants. This study aimed at investigating the effect of P deficiency on the ability of hydroponically grown tomato plants to re-acquire specific compounds generally present in root exudates by using 13C-labeled mols. Results showed that P deficient tomato plants were able to take up citrate (+ 37%) and malate (+ 37%), particularly when compared to controls. While glycine (+ 42%) and fructose (+ 49%) uptake was enhanced in P shortage, glucose acquisition was not affected by the nutritional status. Unexpectedly, results also showed that P deficiency leads to a 13C enrichment in both tomato roots and shoots over time (shoots-+ 2.66‰, roots-+ 2.64‰, compared to control plants), probably due to stomata closure triggered by P deficiency. These findings highlight that tomato plants are able to take up a wide range of metabolites belonging to root exudates, thus maximizing C trade off. This trait is particularly evident when plants grew in P deficiency.

Scientific Reports published new progress about Cell morphology. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, SDS of cas: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Swain, Alaka published the artcileMorphophysiological alterations in transgenic rice lines expressing PPDK and ME genes from the C4 model Setaria italica, Computed Properties of 97-67-6, the main research area is Setaria transgenic plant morphophysiol alteration PPDK ME; Chlorophyll fluorescence; Electron transport rate; Malic enzyme; Nonphotochemical quenching; Photosynthetic rate; Pyruvate orthophosphate dikinase; Stomatal conductance.

To evaluate the effect of C4 enzymes in rice, we developed transgenic rice lines by sep. introducing Setaria italica PPDK [SiPPDK] and S. italica ME [SiME] gene constructs under the control of the green tissue-specific maize PPDK promoter. Rice plant lines for both constructs were screened using the polymerase chain reaction (PCR), Southern hybridization, and expression anal. The results from qRT-PCR and enzyme activity anal. revealed higher expression and activity of both PPDK and NADP-ME genes compared with the nontransformed and empty-vector-transformed plants. The average photosynthetic efficiency of transgenic plant lines carrying the PPDK and NADP-ME genes increased by 18% and 12%, resp., and was pos. correlated with the increased accumulation of photosynthetic pigment. The decrease in Fv/Fm, increased electron transport rate (ETR), and increased photochem. quenching (qP) compared with nontransformed control plants suggest that transgenic rice plants transferred more absorbed light energy to photochem. reactions than wild-type plants. SiME-transgenic plants displayed reduced leaf malate content and superior performance under water deficit conditions. Interestingly, the transgenic plants showed yield enhancement by exhibiting increased plant height, panicle length, panicle weight and thousand grain weight Overall, the exogenous foxtail millet C4 gene PPDK enhanced photosynthesis and yield to a greater extent than NADP-ME.

Journal of Plant Physiology published new progress about Cell morphology. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Computed Properties of 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yan, Jingmin published the artcileA 3-O-methylated heterogalactan from Pleurotus eryngii activates macrophages, Product Details of C6H12O6, the main research area is Pleurotus heterogalactan macrophage MAPK NFkappaB TLR2 signaling; Heterogalactan; MAPKs; Macrophage; NF-κB; Pleurotus eryngii; TLR2.

Mushroom-derived polysaccharides exhibit various biol. activities owing to their diverse structural features. Here, we purified a 3-O-methylated heterogalactan (WPEP-N-b, Mw 21.4 kDa) from the fruiting bodies of Pleurotus eryngii. WPEP-N-b is composed primarily of galactose (43.8%), mannose (39.3%), methyl-galactose (11.7%) and glucose (9.2%) residues, with the main chain being composed of α-1,6-linked D-Galp and 3-O-Me-D-Galp, branched at O-2 with single t-β-D-Manp as major the side chain. β-1,6-D-Glcp residues are present as minor components either in side-chains or backbone. WPEP-N-b increases macrophage phagocytosis and secretion of NO, TNF-α, IL-6 and IL-1β. Mechanistic studies demonstrate that WPEP-N-b promotes the degradation of IκB-α, and enhances phosphorylation of MAPKs and the NF-κB p65 subunit. Our results also indicate that this polysaccharide activates RAW264.7 cells via MAPK and NF-κB signaling pathways and the Toll-like receptor 2(TLR2). These results increase our understanding as to how mushroom-derived polysaccharides modulate the immunol. process.

Carbohydrate Polymers published new progress about Cell activation. 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, Product Details of C6H12O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts