Tag: M.W=250-300

Gao, Yuan published the artcileFrontal Polymerization of Thin Layers on a Thermally Insulating Substrate, Recommanded Product: Trimethylolpropane triacrylate, the publication is ACS Applied Polymer Materials (2022), 4(7), 4919-4927, database is CAplus.

Motivated by the use of frontal polymerization for the manufacturing of thin layers with thickness down to 1̃00μm, we numerically and exptl. investigate the interplay between the exothermic polymerization and the heat losses to the substrate. The results show how the reaction-diffusion power balance affects the velocity and temperature of the polymerization front. The lower thickness limit of the thin layer depends on the cure kinetics of the resin and the thermal properties of the substrate and is described by a scaling law. Concurrently, thin-layer frontal polymerization experiments confirm the effects of front-substrate interaction on the front propagation and the limiting thickness of the polymerized layer. The present study offers a fundamental understanding of the resin-substrate interplay in thin-layer frontal polymerization and provides a quant. description of the limiting thickness of the layer in the fabrication of functional thin polymeric parts and resin coatings.

ACS Applied Polymer Materials published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Recommanded Product: Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Guo-Xing published the artcileA microfluidics-dispensing-printing strategy for Janus photonic crystal microspheres towards smart patterned displays, Recommanded Product: Trimethylolpropane triacrylate, the publication is Journal of Polymer Science (Hoboken, NJ, United States) (2022), 60(11), 1710-1717, database is CAplus.

From the implementation point of view, the printable magnetic Janus colloidal photonic crystals (CPCs) microspheres are highly desirable. Herein, we developed a dispensing-printing strategy for magnetic Janus CPCs display via a microfluidics-automatic printing system. Monodisperse core/shell colloidal particles and magnetic Fe₃O₄ nanoparticles precursor serve as inks. Based on the equilibrium of three-phase interfacial tensions, Janus structure is successfully formed, followed by UV irradiation and self-assembly of colloid particle to generate magnetic Janus CPCs microspheres. Notably, this method shows distinct superiority with highly uniform Janus CPCs structure, where the TMPTA/Fe₃O₄ hemisphere is in the bottom side while CPCs hemisphere is in the top side. Thus, by using Janus CPCs microspheres with two different structural colors as pixel points, a pattern with red flower and green leaf is achieved. Moreover, 1D linear Janus CPCs pattern encapsulated by hydrogel is also fabricated. Both the color and the shape can be changed under the traction of magnets, showing great potentials in flexible smart displays. We believe this work not only offers a new feasible pathway to construct magnetic Janus CPCs patterns by a dispensing-printable fashion, but also provides new opportunities for flexible and smart displays.

Journal of Polymer Science (Hoboken, NJ, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Recommanded Product: Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Shin, Junhwa published the artcileAn Efficient New Route to Plasmenyl-type Lipids: Synthesis and Cytotoxicity of a Plasmenylcholine Analog of the Antitumor Ether Lipid ET-18-OMe, COA of Formula: C9H9NO6S, the publication is Journal of the American Chemical Society (2001), 123(3), 508-509, database is CAplus and MEDLINE.

Glycerolipid I has been prepared via a facile reaction sequence with use of an acrolein acetal derivative and 1-iodo-tridecane as precursors under Barbier-type reaction conditions. The observed regioselectivities and high Z:E ratios of the lithiated 4,4-di-tert-butylbiphenyl (DBB)-mediated coupling reaction are likely due to a lithiated allylic anion that undergoes stereoselective γ-coupling with electrophiles via lithium ion-acetal chelation. The resulting racemic I shows cytotoxic properties similar to the clin. relevant ATL analog 1-O-octadecyl-2-O-methyl-rac-glycero-3-phosphocholine (ET-18-OMe); however, it is not presently known whether the cytotoxic mechanism for I is apoptotic in nature as it is for ET-18-OMe. Experiments designed to adapt this method for the preparation of plasmalogens and the pure R-I/S-I stereoisomers are in progress. Addnl. experiments aimed at probing the relative cytotoxicity of R-I, S-I, and racemic I, as well as the mechanism of cell death upon exposure to these ATL, are also planned.

Journal of the American Chemical Society published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C7H3Cl2F3O2S, COA of Formula: C9H9NO6S.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Barton, Donald L. published the artcilePreparation of positive inotropes using glycidyl derivatives: influence of metal ions and solvent on stereochemical outcome, Safety of (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is Tetrahedron: Asymmetry (1992), 3(9), 1189-96, database is CAplus.

The choice of base and solvent has a dramatic effect on the attack of nitrogen nucleophiles on enantiomerically enriched glycidyl sulfonates I (R = 4-Me, 3-NO₂). Under the proper conditions attack can be largely limited to displacement of the sulfonate moiety thus retaining the original stereochem. Conditions were also noted where the initial attack resulted from epoxide opening. Subsequent attack of the intermediate alkoxide on the sulfonate group then yielded a product of opposite stereochem. The methodol. was applied to the syntheses of both enantiomers of carsatrin (II).

Tetrahedron: Asymmetry published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Safety of (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Brandao, Tiago A. S. published the artcileBond length-reactivity correlations for sulfate monoesters. The crystal structure of potassium 4-nitrophenyl sulfate, C₆H₄KNO₆S, Recommanded Product: Potassium 4-nitrophenyl sulfate, the publication is Journal of Molecular Structure (2005), 734(1-3), 205-209, database is CAplus.

K 4-nitrophenyl sulfate, C₆H₄KNO₆S, crystallizes in the orthorhombic system, Pbca space group, with a 6.990(1), b 13.130(1), c 19.180(1) Å. Crystallog. data are given. The asym. unit consists of a discrete ionic pair of the salt. The packing shows the K⁺ ion surrounded by eight O atoms from six different p-nitrophenyl sulfate anions. The structure-structure and structure-reactivity correlations relevant to sulfate transfer process are discussed.

Journal of Molecular Structure published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Recommanded Product: Potassium 4-nitrophenyl sulfate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhang, Peng published the artcileUV Curable Robust Durable Hydrophobic Coating Based on Epoxy Polyhedral Oligomeric Silsesquioxanes (EP-POSS) and Their Derivatives, Recommanded Product: Trimethylolpropane triacrylate, the publication is ACS Omega (2022), 7(20), 17108-17118, database is CAplus and MEDLINE.

Hydrophobic coatings have considerable potential applications in many fields. Easy-to-operate and high durability are essential for practical use, fast cured and solvents-free are plus, and if possessed of characteristics (antigraffiti, good adhesion, high hardness, heat resistance, wide range of applicability, etc.) at the same time, which is a dream solution Herein, a facile one-step approach with the above features was reported for a UV curable robust hydrophobic coating based on Epoxy Polyhedral Oligomeric Silsesquioxanes (EP-POSS). The structure and surface morphol. of these EP-POSS and their derivatives were systematically studied. Because of the core-in-cage structure which was constructed by repeating units R-Si(O_1/2)₃– and the strong covalent bond of Si-C and Si-O, the coatings displayed high pencil hardness (6-8H), high thermal stability with initial decomposition temperature around 350-400°C, and high water contact angle (up to 108.06°) even after outdoor exposure for a month. These POSS and their derivatives are expected to find uses in various applications such as stain resistance, self-cleaning, scratch resistance, and cigarette moxibustion resistance of wood furniture, kitchenware, medical and industrial appliances.

ACS Omega published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C7H8BrClFN, Recommanded Product: Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sieroslawski, Krzysztof published the artcilePotassium p-nitrophenyl sulfate, Synthetic Route of 6217-68-1, the publication is Acta Crystallographica, Section C: Crystal Structure Communications (2004), C60(7), m327-m329, database is CAplus and MEDLINE.

Crystals of the title compound are orthorhombic, space group Pbca, with a 6.905(3), b 13.116(5), c 18.969(11) Å; Z = 8, d_c = 1.989; R = 0.036, R_w(F²) = 0.085 for 2514 reflections. The structure is built up from p-nitrophenyl sulfate anions and K cations. Adjacent anions form dimers, which are linked together in a three-dimensional network via short C-H···O contacts. The coordination sphere of the K⁺ ions may be described as a distorted square antiprism. The crystal structure is further stabilized by π-π stacking interactions between the aryl rings.

Acta Crystallographica, Section C: Crystal Structure Communications published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C7H14N4, Synthetic Route of 6217-68-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Burlingham, Benjamin T. published the artcile³⁴S Isotope Effect on Sulfate Ester Hydrolysis: Mechanistic Implications, COA of Formula: C6H4KNO6S, the publication is Journal of the American Chemical Society (2003), 125(43), 13036-13037, database is CAplus and MEDLINE.

In this communication, we report the first determination of ³⁴S kinetic isotope effects (KIEs) for the hydrolysis of sulfate monoesters. The method involves the conversion of the inorganic sulfate, acquired at partial extent of reaction, to SO₂, followed by isotope ratio determination by mass spectrometry. The KIEs determined for p-nitrophenyl sulfate and p-acetylphenyl sulfate are 1.0154 (±0.0002) and 1.0172 (±0.0003), resp. These results, together with previous peripheral ¹⁸O KIE values, are inconsistent with an associative mechanism. The isotope effect method we report should also prove useful for studying the mechanism of other sulfuryl group transfers, including sulfatase and sulfotransferase reactions, as well as sulfate hydrolysis under other conditions.

Journal of the American Chemical Society published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, COA of Formula: C6H4KNO6S.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhang, Chufeng published the artcileDesign, synthesis and evaluation of novel 7H-pyrrolo[2,3-d]pyrimidin-4-amine derivatives as potent, selective and reversible Bruton’s tyrosine kinase (BTK) inhibitors for the treatment of rheumatoid arthritis, Computed Properties of 115314-17-5, the publication is European Journal of Medicinal Chemistry (2019), 121-143, database is CAplus and MEDLINE.

A series of 7H-pyrrolo[2,3-d]pyrimidine derivatives was designed and synthesized as reversible BTK inhibitors, and evaluated for their kinase selectivity, anti-proliferative activity against the B-cell lymphoma cell lines (Ramos, Jeko-1) and cell line BTK enhanced (Daudi) in vitro. Among them, pyrrolo[2,3-d]pyrimidine I exhibited the most excellent potency (IC₅₀ = 3.0 nM against BTK enzyme, 8.52 μM, 11.10 μM and 7.04 μM against Ramos, Jeko-1, Daudi cells, resp.), good kinase selectivity and inhibited BTK Y223 auto-phosphorylation and PLCγ2 Tyr1217 phosphorylation. Importantly, the compound I showed effective anti-arthritic effect on collagen-induced arthritis (CIA) model in vivo. 60 Mg/kg dose level once a day group displayed markedly reduced joint damage and cellular infiltration without any bone and cartilage morphol. change.

European Journal of Medicinal Chemistry published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C16H24BF4Ir, Computed Properties of 115314-17-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sun, Ke published the artcileSunlight Induced Polymerization Photoinitiated by Novel Push-Pull Dyes: Indane-1,3-Dione, 1H-Cyclopenta[b]Naphthalene-1,3(2H)-Dione and 4-Dimethoxyphenyl-1-Allylidene Derivatives, Computed Properties of 15625-89-5, the publication is Macromolecular Chemistry and Physics (2022), 223(4), 2100439, database is CAplus.

The free radical polymerization of acrylates photo-initiated by push-pull dye-based photoinitiating systems (PISs) is widely studied in previous works. As a supplementary study on push-pull dyes, here in this article, 25 push-pull structures comprising electron acceptors derived from indane-1,3-dione and 1H-cyclopenta[b]naphthalene-1,3(2H)-dione (series 1) and 4-dimethoxyphenyl-1-allylidene moieties (series 2) and various electron donors are synthesized and examined as innovative structures for photoinitiation. Among the 2 series of dyes examined in this work and by monitoring the polymerization processes by RT-FTIR measurements, 4 dyes are determined as exhibiting excellent photoinitiation performances and these dyes are selected to perform further studies concerning the chem. mechanisms occurring inside the 3-component PISs, for example, steady state photolysis, fluorescence quenching measurements, and cyclic voltammetry. Markedly, their reactivity is also proved by photoinitiation performance upon sunlight. These results prompt one to develop high performance push-pull dyes as photosensitizers and sunlight can be used as a mild and ecofriendly light source, which can advantageously replace LEDs for the free radical photopolymerization in the future. Finally, the formation of 3-dimensional patterns with an excellent gradient of resolution is successfully achieved by the direct laser write (DLW) with/without SiO₂ fillers.

Macromolecular Chemistry and Physics published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C17H19N3O7S, Computed Properties of 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics