Tag: 200-300

Synthesis of an oil absorbent polymer particle with core-shell structure was written by Yang, Fajie;Li, Guoping;Zhang, Zhiheng;Cheng, Lei;Liu, Weili;Liu, Shaozhu. And the article was included in Youqitian Huanjing Baohu in 2014.Quality Control of Diethyleneglycoldiacrylate This article mentions the following:

The core structure of absorbent polymer particle was synthesized by suspension polymerization using Bu acrylate and n-laurylacrylate as monomers, diethylene glycol diacrylate as crosslinking agent, 2,2′-Azobis (2-methylpropionitrile) as initiator. Then, the shell structure was synthesized at the outer surface of the polymer particle using divinylbenzene and phenylethylene as monomers. The effects of the ratio of monomer amounts of core to that of shell, the category and amount of crosslinking agent and initiation temperature on the absorbent ability were studied. The oil absorbent polymer particle with core-shell structure was synthesized with the absorption capacity of 29 g/g. Saturation absorption time of the absorbent polymer particle with core-shell was 3 min, and it was markedly faster than that without core-shell structure. In the experiment, the researchers used many compounds, for example, Diethyleneglycoldiacrylate (cas: 4074-88-8Quality Control of Diethyleneglycoldiacrylate).

Diethyleneglycoldiacrylate (cas: 4074-88-8) belongs to alcohols. A strong base can deprotonate an alcohol to yield an alkoxide ion (R―O−). For example, sodamide (NaNH2), a very strong base, abstracts the hydrogen atom of an alcohol. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Quality Control of Diethyleneglycoldiacrylate

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Evaluation of the role of graphene-based Cu(I) catalysts in borylation reactions was written by Franco, Mario;Sainz, Raquel;Lamsabhi, Al Mokhtar;Diaz, Cristina;Tortosa, Mariola;Cid, M. Belen. And the article was included in Catalysis Science & Technology in 2021.HPLC of Formula: 68716-49-4 This article mentions the following:

Graphene-supported Cu(I) species were prepared by reduction of CuCl₂ adsorbed on graphene oxide surface and examined for catalytic performance in alkyl halide borylation with B₂pin₂, giving alkylboronates. Carbon-supported catalysts have been considered as macromol. ligands which modulate the activity of the metallic catalytic center. Understanding the properties and the factors that control the interactions between the metal and support allows a fine tuning of the catalyzed processes. Although huge effort has been devoted to comprehending binding energies and charge transfer for single atom noble metals, the interaction of graphenic surfaces with cheap and versatile Cu(I) salts has been scarcely studied. A methodical exptl. and theor. anal. of different carbon-based Cu(I) materials in the context of the development of an efficient, general, scalable, and sustainable borylation reaction of aliphatic and aromatic halides has been performed. We have also examined the effect of microwave (MW) radiation in the preparation of these type of materials using sustainable graphite nanoplatelets (GNP) as a support. A detailed anal. of all the possible species in solution revealed that the catalysis is mainly due to an interesting synergetic Cu₂O/graphene performance, which has been corroborated by an extensive theor. study. We demonstrated through DFT calculations at a high level of theory that graphene enhances the reactivity of the metal in Cu₂O against the halide derivative favoring a radical departure from the halogen. Moreover, this material is able to stabilize radical intermediates providing unexpected pathways not observed using homogeneous Cu(I) catalyzed reactions. Finally, we proved that other common carbon-based supports like carbon black, graphene oxide and reduced graphene oxide provided poorer results in the borylation process. In the experiment, the researchers used many compounds, for example, 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4HPLC of Formula: 68716-49-4).

2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.HPLC of Formula: 68716-49-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis, Characterization and Photoluminescence Study of Novel Sulfobetaine Polyelectrolytes was written by Tarannum, Nazia;Mishra, Hirdyesh;Singh, Meenakshi. And the article was included in Journal of Fluorescence in 2011.Electric Literature of C10H14O5 This article mentions the following:

A novel sulfobetaine copolymer is developed via polycondensation approach. The comonomers, melamine, condenses with a diketone, 5,5-dimethyl-1,3-cyclohexane (dimedone) to produce polyimine chain based on Schiff base chem. Dimedone-[N,N’ melaminium] propane sulfonate copolymer crystals were obtained on treatment of the polyimine with sulfopropylating agent, 1,3-propane sultone with a crosslinker, di(ethylene glycol diacrylate) (DEGDA). This crosslinked sulfobetaine polymer yielded fine needle like single crystals and shows strong blue fluorescence and a week green phosphorescence. Multi-exponential fluorescence decay function indicates the presence of different conformers both in solution and crystalline phase. This easy straightforward protocol for synthesis of crystalline, soluble, and luminescent polymer could prove to be a landmark in development of next generation smart functional materials. In the experiment, the researchers used many compounds, for example, Diethyleneglycoldiacrylate (cas: 4074-88-8Electric Literature of C10H14O5).

Diethyleneglycoldiacrylate (cas: 4074-88-8) belongs to alcohols. The oxygen atom of the strongly polarized O―H bond of an alcohol pulls electron density away from the hydrogen atom. This polarized hydrogen, which bears a partial positive charge, can form a hydrogen bond with a pair of nonbonding electrons on another oxygen atom. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Electric Literature of C10H14O5

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

A study of the effects of thiols on the frontal polymerization and pot life of multifunctional acrylate systems with cumene hydroperoxide was written by Morales, Alejandra;Pojman, John A.. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2013.Formula: C10H14O5 This article mentions the following:

In an effort to create frontal polymerization systems with a “fail-safe” curing mechanism, we studied the effects of thiols on the thermal frontal polymerization velocity and pot life of a mixture of a multifunctional acrylate, kaolin clay (filler), and cumene hydroperoxide with either trimethylolpropane tris(3-mercaptopropionate) or 1-dodecanethiol (DDT). The acrylates were trimethylolpropane triacrylate, trimethylolpropane ethoxylate triacrylate, 1,6-hexanediol diacrylate, and di(ethylene glycol) diacrylate. Without a thiol, frontal polymerization did not occur. The front velocity increased with the concentration of either thiol, which has not been observed with peroxide initiators. The use of DDT yielded longer pot lives than the trithiol. The front velocities were inversely related to the pot lives. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013. In the experiment, the researchers used many compounds, for example, Diethyleneglycoldiacrylate (cas: 4074-88-8Formula: C10H14O5).

Diethyleneglycoldiacrylate (cas: 4074-88-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Grignard and organolithium reagents are powerful tools for organic synthesis, and the most common products of their reactions are alcohols.Formula: C10H14O5

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Redox-Induced Single-Molecule Magnetism in Mixed-Valent [2 × 2] Co₄ Grid Complexes was written by Tong, Jin;Demeshko, Serhiy;John, Michael;Dechert, Sebastian;Meyer, Franc. And the article was included in Inorganic Chemistry in 2016.Recommanded Product: 49669-14-9 This article mentions the following:

Homovalent [2 × 2] Co₄ grid complexes [Co^II₄L^H₄](BF₄)₄ (1) and [Co^II₄L^Me₄](BF₄)₄ (2) with two new bis(terdentate) pyrazolate-bridged ligands, HL^H = 3,5-bis(6-(1H-pyrazol-1-yl)pyrid-2-yl)pyrazole and HL^Me = 4-methyl-3,5-bis(6-(1H-pyrazol-1-yl)pyrid-2-yl)pyrazole, were synthesized and comprehensively characterized. X-ray crystallog. analyses of 1 and 2 showed a square arrangement of cobalt(II) ions, each metal ion in distorted octahedral {N₆} coordination created by two terdentate compartments from orthogonal ligand strands. Magnetic measurements revealed the metal ions’ high-spin (S = 3/2) state and moderate antiferromagnetic interactions to give an overall diamagnetic S_T = 0 ground state of 1 and 2. Twofold oxidation, electrochem. or chem., led to the dimixed-valent [2 × 2] Co₄ grids [Co^II₂Co^III₂L^H₄](BF₄)₆ (3) and [Co^II₂Co^III₂L^Me₄](BF₄)₆ (4). ESI mass spectrometry confirmed the ruggedness of all grids 1-4 and their integrity in solution, and anal. of the UV/vis/NIR spectra suggested moderate electronic coupling. Solution ¹H and ¹³C NMR spectra of paramagnetic 1-4 were recorded and confirmed that the dimixed-valent Co^II₂Co^III₂ grids are charge-localized on the NMR time scale. X-ray crystallog. revealed significant structural grid distortion upon oxidation, with the low-spin Co^III at opposite corners and in almost octahedral {N₆} environment but the remaining Co^II ions’ coordination sphere approaching a trigonal prism. SQUID studies showed the high-spin Co^II to be magnetically isolated in the dimixed-valent Co^II₂Co^III₂ grids, and both 3 and 4 to display frequency-dependent peaks in the out-of-phase (χ”) component of the alternating-current (ac) magnetic susceptibility data, characteristic for single mol. magnet (SMM) properties (with energy barriers U_eff/k_B = 16 and 26 K, and relaxation times τ₀ = 6.7·10^-6 and 5.0·10^-6 s for 3 and 4, resp.). The results are discussed in terms of cooperative effects that originate from elastic coupling within the grids, mediated by the rigid bridging ligands. These effects synergistically lead to the preferred trans configuration of the dimixed-valent Co^II₂Co^III₂ grids and to structural distortions that are beneficial for SMM properties. In the experiment, the researchers used many compounds, for example, 2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9Recommanded Product: 49669-14-9).

2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9) belongs to alcohols. The oxygen atom of the strongly polarized O―H bond of an alcohol pulls electron density away from the hydrogen atom. This polarized hydrogen, which bears a partial positive charge, can form a hydrogen bond with a pair of nonbonding electrons on another oxygen atom. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Recommanded Product: 49669-14-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Bridging and Conformational Control of Porphyrin Units through Non-Traditional Rigid Scaffolds was written by Grover, Nitika;Locke, Gemma M.;Flanagan, Keith J.;Beh, Michael H. R.;Thompson, Alison;Senge, Mathias O.. And the article was included in Chemistry – A European Journal in 2020.Related Products of 68716-49-4 This article mentions the following:

Connecting two porphyrin units in a rigid linear fashion, without any undesired electron delocalization or communication between the chromophores, remains a synthetic challenge. Herein, a broad library of functionally diverse multi-porphyrin arrays that incorporate the non-traditional rigid linker groups cubane and bicyclo[1.1.1]pentane (BCP) is described. A robust, reliable, and versatile synthetic procedure was employed to access porphyrin-cubane/BCP-porphyrin arrays, representing the largest non-polymeric structures available for cubane/BCP derivatives These reactions demonstrate considerable substrate scope, from utilization of small Ph moieties to large porphyrin rings, with varying lengths and different angles. To control conformational flexibility, amide bonds were introduced between the bridgehead carbon of BCP/cubane and the porphyrin rings. Through varying the orientation of the substituents around the amide bond of cubane/BCP, different intermol. interactions were identified through single crystal X-ray anal. These studies revealed non-covalent interactions that are the first-of-their-kind including a unique iodine-oxygen interaction between cubane units. These supramol. architectures indicate the possibility to mimic a protein structure due to the sp³ rigid scaffolds (BCP or cubane) that exhibit the essential conformational space for protein function while simultaneously providing amide bonds for mol. recognition. In the experiment, the researchers used many compounds, for example, 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4Related Products of 68716-49-4).

2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Related Products of 68716-49-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts