Author: Jessica.F

El-Saeed, H. M. published the artcileSynthesis and characterization of novel ionic liquids based on imidazolium for acid corrosion inhibition of aluminum: Experimental, spectral, and computational study, Recommanded Product: 1-Bromooctane, the publication is Journal of Molecular Liquids (2022), 119177, database is CAplus.

Three newly ionic liquids I [R = C₈H₁₇, C₁₀H₂₁, C₁₂H₂₅] were synthesized and their chem. structures characterized via different spectra techniques (FT-IR, elemental anal., and ¹H NMR). The corrosion inhibition of newly ionic liquids was evaluated on aluminum alloy in 1 M HCl at varied exposure temperatures (298-318 K) and varied concentrations via various exptl. and theor. methods for example mass loss, electrochem., spectral, and computational calculations The results illustrate that these types of ionic liquids inhibit corrosion of aluminum in acid solution with maximum inhibition efficiency was reached 83.2% at 298 K. The inhibition efficiency increases with the addition of zinc sulfate which had a synergistic impact which was reached to 92.7%. Also, the concentration of ionic liquids and the kind of cation have an impact on the obtained results. The existence of these inhibitors in the acidic solution improves the charge transfer resistance and lessens the double-layer capacitance. The Langmuir adsorption isotherm governs the adsorption of these inhibitors’ mols. on the aluminum alloy surface, and they behave as mixed-type inhibitors. The outputs reveal that the computational calculations match the exptl. data rather well.

Journal of Molecular Liquids published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Recommanded Product: 1-Bromooctane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Davison, Edwin C. published the artcileN-Alkenyl nitrone dipolar cycloaddition routes to piperidines and indolizidines. Part 8. The scope of tandem reactions involving hydroxylamine-alkyne cyclizations, COA of Formula: C7H13BrSi, the publication is Tetrahedron (1996), 52(35), 11601-11624, database is CAplus.

A tandem sequence of hydroxylamine-alkyne cyclization/1,3-dipolar cycloaddition, provides useful entry into tricyclic systems of type I. The scope of such reactions is explored in this paper. A novel cascade cyclization of N-hydroxypyrrolidines of type II (n = 1, 3) involving hydroxylamine-alkyne cyclization, Cope elimination and 1,3-dipolar cycloaddition is also reported.

Tetrahedron published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, COA of Formula: C7H13BrSi.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Zoombelt, Arjan P. published the artcileSynthesis and photovoltaic performance of a series of small band gap polymers, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Journal of Materials Chemistry (2009), 19(30), 5336-5342, database is CAplus.

A series of four small band gap polymers have been synthesized and have been incorporated into bulk heterojunction solar cells. The polymers were prepared via Yamamoto coupling and consist of alternating electron-rich dithiophene and electron-deficient bisquinoxaline or thienopyrazine units. In the thin solid films the optical band gaps vary from 1.38 eV for the bisquinoxaline to 1.21 eV for thienopyrazine containing polymers. All polymers provide a photovoltaic response when blended with a methanofullerene as electron acceptor in the near-IR region up to the optical band gap. The best cells reach an efficiency of 1.5% under estimated standard solar light conditions (air-mass 1.5G, 100 mW/cm²).

Journal of Materials Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C9H9BrO2, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Chenede, Alain published the artcileCationic rearrangements controlled by the presence of a silyl group, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of Organometallic Chemistry (2003), 686(1-2), 84-93, database is CAplus.

1,1-Disilylcarbinols having two alkyl groups on the adjacent carbon atom react with thionyl chloride in sulfur dioxide to give the product in which one of the alkyl groups has migrated towards the two silyl groups, and one of the silyl groups has been removed from the resultant cation. The reaction is seen in ring-expansion, as in the conversion of cyclohexylbis[dimethyl(phenyl)silyl]carbinol into 1-dimethyl(phenyl)silylcycloheptene, and in open chains, as in the conversion of 1,1-bis[dimethyl(phenyl)silyl]-2-methylpropanol into (E)- and (Z)-2-dimethyl(phenyl)silylbut-2-ene. Phenyldimethylsilyllithium reacts with pinacolone to give the α-silyl carbinol, which rearranges in the same way to give 2,3-dimethylbut-2-ene, effectively achieving a pinacolone-to-pinacol rearrangement.

Journal of Organometallic Chemistry published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Gleiter, Rolf published the artcileRegiochemistry of the intramolecular [2+2] photocycloaddition of enones to vinyl ethers as a function of chain length, Formula: C7H13BrSi, the publication is Chemische Berichte (1992), 125(8), 1899-911, database is CAplus.

The intramol. [2+2] cycloaddition of a cyclohexenone moiety bound to a vinyl ether fragment has been explored. The regiochem. and the quantum yield of the reaction have been investigated as a function of the chain length n and the position of the methoxy group. In those cases where the chain consists of 3 and 4 members the position of the methoxy group has no influence on the regiochem. but on the quantum yield. Only head-to-head cycloaddition is observed In the case of n = 2 both the regiochem. and the quantum yield depend strongly on the position of the methoxy group. The main reason for the different behavior of n = 2 is due to a through-bond effect between the two olefinic units mediated by a C₂H₄ bridge.

Chemische Berichte published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, Formula: C7H13BrSi.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Sorci, Mirco published the artcileVirucidal N95 Respirator Face Masks via Ultrathin Surface-Grafted Quaternary Ammonium Polymer Coatings, HPLC of Formula: 143-15-7, the publication is ACS Applied Materials & Interfaces (2022), 14(22), 25135-25146, database is CAplus and MEDLINE.

N95 respirator face masks serve as effective phys. barriers against airborne virus transmission, especially in a hospital setting. However, conventional filtration media materials, such as nonwoven polypropylene fibers, have no inherent virucidal activity, and thus, the risk of surface contamination increases with wear time. The ability of face masks to protect against infection can be likely improved by incorporating components that deactivate viruses on contact. We present a facile method for covalently attaching antiviral quaternary ammonium polymers to the fiber surfaces of nonwoven polypropylene fabrics that are commonly used as active filtration materials in N95 respirators via UV-initiated grafting of biocidal agents. Here, C₁₂-quaternized benzophenone is simultaneously polymerized and grafted onto melt-blown or spunbond polypropylene fabric using 254 nm UV light. This grafting method generated ultrathin polymer coatings which imparted a permanent cationic charge without grossly changing the fiber morphol. or air resistance across the filter. For melt-blown polypropylene, which comprises the filtration layer of N95 respirator masks, filtration efficiency was neg. impacted from 72.5 to 51.3% for uncoated and coated single-ply samples, resp. Similarly, directly applying the antiviral polymer to full N95 masks decreased the filtration efficiency from 90.4 to 79.8%. This effect was due to the exposure of melt-blown polypropylene to organic solvents used in the coating process. However, N95-level filtration efficiency could be achieved by wearing coated spunbond polypropylene over an N95 mask or by fabricating N95 masks with coated spunbond as the exterior layer. Coated materials demonstrated broad-spectrum antimicrobial activity against several lipid-enveloped viruses and Escherichia coli bacteria. For example, a 4.3-log reduction in infectious MHV-A59 virus and a 3.3-log reduction in infectious SuHV-1 virus after contact with coated filters were observed, although the level of viral deactivation varied significantly depending on the virus strain and protocol for assaying infectivity.

ACS Applied Materials & Interfaces published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C11H10O, HPLC of Formula: 143-15-7.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Riente, Paola published the artcileShedding light on the nature of the catalytically active species in photocatalytic reactions using Bi₂O₃ semiconductor, COA of Formula: C4H6BrFO2, the publication is Nature Communications (2021), 12(1), 625, database is CAplus and MEDLINE.

The importance of discovering the true catalytically active species involved in photocatalytic systems allows for a better and more general understanding of photocatalytic processes, which eventually may help to improve their efficiency. Bi₂O₃ has been used as a heterogeneous photocatalyst and is able to catalyze several synthetically important visible-light-driven organic transformations. However, insight into the operative catalyst involved in the photocatalytic process is hitherto missing. Herein, we show through a combination of theor. and exptl. studies that the perceived heterogeneous photocatalysis with Bi₂O₃ in the presence of alkyl bromides involves a homogeneous BinBrm species, which is the true photocatalyst operative in the reaction. Hence, Bi₂O₃ can be regarded as a precatalyst which is slowly converted in an active homogeneous photocatalyst. This work can also be of importance to mechanistic studies involving other semiconductor-based photocatalytic processes.

Nature Communications published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C4H6BrFO2, COA of Formula: C4H6BrFO2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Li, Penglei published the artcileDual functions of a novel low-gap polymer for near infra-red photovoltaics and light-emitting diodes, Safety of 2,5-Dibromo-3,4-dinitrothiophene, the publication is Chemical Communications (Cambridge, United Kingdom) (2011), 47(31), 8820-8822, database is CAplus and MEDLINE.

We have synthesized and characterized a new low-gap conjugated polymer, with a broad absorption profile. In blends with a C₇₀ derivative we demonstrate power conversion efficiencies of 0.76%. We show electroluminescence from the polymer peaking at 956 nm, and quantum efficiency of 0.02% in a blend.

Chemical Communications (Cambridge, United Kingdom) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Safety of 2,5-Dibromo-3,4-dinitrothiophene.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Tang, Wei-Ke published the artcileVisible-Light-Enabled Decarboxylative Mono- and Difluoromethylation of Cinnamic Acids under Metal-Free Conditions, Category: bromides-buliding-blocks, the publication is Organic Letters (2017), 19(20), 5501-5504, database is CAplus and MEDLINE.

Several new mono- and difluoromethylation reactions of cinnamic acids using an Eosin Y catalytic system are reported. An efficient alkene fluoromethylation of α,β-unsaturated carboxylic acids, e.g., I, II, and III, was accomplished under ambient temperature and metal-free conditions, with a wide range of functional group tolerance. A mechanism that involves a radical process is proposed for this reaction.

Organic Letters published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C14H10O4S2, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Zhong, Yongliang published the artcileFunctionalized Polyesters via Stereoselective Electrochemical Ring-Opening Polymerization of O-Carboxyanhydrides, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is ACS Macro Letters (2020), 9(8), 1114-1118, database is CAplus and MEDLINE.

Ring-opening polymerization is used to prepare polyesters with precisely controlled mol. weights, mol. weight distributions, and tacticities. Herein, we report a Co/Zn catalytic system that can be activated by an elec. current to mediate efficient ring-opening polymerization of enantiopure O-carboxyanhydrides, allowing for the synthesis of isotactic functionalized polyesters with high mol. weights (>140 kDa) and narrow mol. weight distributions (M_w/M_n < 1.1). We also demonstrate that these catalysts can be used for stereoselective ring-opening polymerization of racemic O-carboxyanhydrides to synthesize syndiotactic or stereoblock copolymers with different glass transition temperatures compared with their atactic counterparts.

ACS Macro Letters published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C18H10F3NO3S2, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary