Category: bromides-buliding-blocks

Biro, Robert published the artcilePolymeric ionic liquid absorbents for n-butanol recovery from aqueous solution, Category: bromides-buliding-blocks, the publication is AIChE Journal (2022), 68(8), e17676, database is CAplus.

A wide-ranging study of imidazolium-based polymeric ionic liquids (PILs) as absorbents in two-phase partitioning bioreactor applications is presented, with a particular focus on the removal of n-butanol from dilute aqueous solutions The study begins with a description of the synthesis and phase transition temperatures of poly(1-vinyl-3-alkylimidazolium) bromides bearing alkyl groups of different lengths, architecture, and composition, as well as analogs bearing various inorganic and carboxylate anions. Knowledge of polymer structure is used to generate insight into the solute affinity of each PIL, as quantified by the measurements of n-butanol partition coefficient (PC_BuOH) and n-butanol/water selectivity (α_b/w). These equilibrium experiments are extended to create a complete P[(VC_12-linIm)(Br)]/n-BuOH/water ternary phase diagram that is used to propose a streamlined n-butanol recovery process.

AIChE Journal 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, Category: bromides-buliding-blocks.

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

Biro, Robert published the artcilePolymeric ionic liquid absorbents for n-butanol recovery from aqueous solution, Formula: C12H25Br, the publication is AIChE Journal (2022), 68(8), e17676, database is CAplus.

A wide-ranging study of imidazolium-based polymeric ionic liquids (PILs) as absorbents in two-phase partitioning bioreactor applications is presented, with a particular focus on the removal of n-butanol from dilute aqueous solutions The study begins with a description of the synthesis and phase transition temperatures of poly(1-vinyl-3-alkylimidazolium) bromides bearing alkyl groups of different lengths, architecture, and composition, as well as analogs bearing various inorganic and carboxylate anions. Knowledge of polymer structure is used to generate insight into the solute affinity of each PIL, as quantified by the measurements of n-butanol partition coefficient (PC_BuOH) and n-butanol/water selectivity (α_b/w). These equilibrium experiments are extended to create a complete P[(VC_12-linIm)(Br)]/n-BuOH/water ternary phase diagram that is used to propose a streamlined n-butanol recovery process.

AIChE Journal 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 C12H25Br, Formula: C12H25Br.

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

Griggs, Billy G. published the artcileAssignment of the carbon-13 chemical shifts of ethidium bromide and analogs in deuterium oxide solution, Application of Dimidium bromide, the publication is Organic Magnetic Resonance (1980), 14(5), 371-3, database is CAplus.

The ¹³C NMR of the title compounds (I; R = Et, Me, R¹ = Ph, X = Br; R = Me, R¹ = H, X = Cl), in D₂O, were assigned. The assignments were based on fully coupled spectra, selective ¹H decoupling, chem. shift arguments, the effect of pD on chem. shifts, and spectra obtained from a selected 180°-τ-90° pulse sequence in conjunction with gated irradiation to obtain nuclear Overhauser enhancement intensification.

Organic Magnetic Resonance published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Application of Dimidium bromide.

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

Braude, Irwin A. published the artcileMechanism of interaction of sodium dodecyl sulfate with mouse interferon, Synthetic Route of 518-67-2, the publication is Journal of Biological Chemistry (1979), 254(16), 7758-64, database is CAplus and MEDLINE.

Na dodecyl sulfate (SDS) and other alkyl sulfates, provided they contained a min. of 12 C atoms (or ≥22 Å in length), stabilized mouse interferon (MIF) in the presence of urea, 2-mercaptoethanol, and heat. When MIF was treated with the alkyl sulfates in the absence of urea and 2-mercaptoethanol, all alkyl sulfates inactivated MIF to the same extent, suggesting that the stabilizing effect of SDS on MIF most likely occurs during the refolding process. Unlike SDS, other amphiphiles such as dodecylamine, Li dodecyl sulfate, and Na 1-dodecane sulfonate did not have an appreciable stabilizing effect on MIF, thus emphasizing the necessity of specific counter-ions and polar groups for SDS to affect MIF stability. Subsequent to its reaction with SDS, MIF no longer was bound to controlled pore glass (CPG) beads. This is most likely due to SDS masking the protein’s silanol-binding sites. Furthermore, after it had reacted with interferon, a portion (∼20 to 50%) of the SDS was no longer retained by the anion exchange resin AG1-X10. Conversely, interferon (which does not bind to AG1-X2, a resin with a larger pore size than AG1-X10) was retained by the resin AG1-X2 after it has reacted with SDS. In addition, SDS-treated MIF was able to bind to the immobilized hydrophobic ligand hexyl-agarose under conditions where the majority of the MIF itself was not retained. Some SDS co-eluted with MIF from AG1-X10, indicating that SDS binds to MIF. Furthermore, since SDS-treated MIF was retained by AG1-X2 and hexyl-agarose, at least some of the detergent’s polar and hydrophobic regions are located at the surface of the interferon mol.

Journal of Biological Chemistry published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Synthetic Route of 518-67-2.

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

Arrechea-Marcos, I. published the artcileMolecular aggregation of naphthalimide organic semiconductors assisted by amphiphilic and lipophilic interactions: a joint theoretical and experimental study, Name: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Physical Chemistry Chemical Physics (2017), 19(8), 6206-6215, database is CAplus and MEDLINE.

Amphiphilic and lipophilic donor-acceptor naphthalimide-oligothiophene assemblies exhibiting almost identical intramol. properties, but differing in their intermol. interactions, were synthesized. Here the authors analyze the effect of replacing the normally used lipophilic alkyl chains with hydrophilic ones in directing mol. aggregation from an antiparallel to a parallel stacking. This different mol. packing of the amphiphilic, NIP-3T_Amphi, and lipophilic, NIP-3T_Lipo, systems is assessed by electronic spectroscopies, scanning electronic microscopy and DFT quantum-chem. calculations Theor. calculations indicate that the presence of amphiphilic interactions promotes a face-to-face parallel arrangement of neighbor mols., which induces improved electronic coupling and therefore enhances the charge transport ability and photoconducting properties of this type of materials. Time of flight and photoconducting measurements are used to determine the impact of the amphiphilic and lipophilic interactions on their possible performance in optoelectronic devices.

Physical Chemistry Chemical Physics 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, Name: 2,5-Dibromo-3,4-dinitrothiophene.

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

de Paula, Fernando H. M. published the artcileAlkyl glyceryl ethers as water-based lubricant additives in mixtures with xanthan gum, Recommanded Product: 1-Bromooctane, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 127881, database is CAplus.

Water-based lubricants are greener and more environmentally friendly than comparable oil-based lubricants. However, water-based lubricants typically have a poorer performance and, thus, need to be formulated with various additives. Here, alkyl glyceryl ethers, a class of nonionic surfactants, were investigated as lubricant additives. To this purpose, aqueous solutions of newly synthesized ethers (with different alkyl chain lengths, C8, C10, C12, and C14) were formulated with xanthan gum. The lubrication performance of these formulations was then tested exptl. Clearly, alkyl glyceryl ethers showed a significantly improved performance (higher friction reduction) with increasing the alkyl chain length. However, the ethers had to be formulated with xanthan gum, with which they formed a complex, which promoted ether dispersion and probably adsorption on the metal surface in the aqueous phase, thereby drastically reducing friction. Thus, the alkyl glyceryl ethers synthesized in this work are attractive green and highly efficient lubricant additives, which can improve the sustainability of industrial lubrication processes.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects 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

de Paula, Fernando H. M. published the artcileAlkyl glyceryl ethers as water-based lubricant additives in mixtures with xanthan gum, Application of 1-Bromododecane, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 127881, database is CAplus.

Water-based lubricants are greener and more environmentally friendly than comparable oil-based lubricants. However, water-based lubricants typically have a poorer performance and, thus, need to be formulated with various additives. Here, alkyl glyceryl ethers, a class of nonionic surfactants, were investigated as lubricant additives. To this purpose, aqueous solutions of newly synthesized ethers (with different alkyl chain lengths, C8, C10, C12, and C14) were formulated with xanthan gum. The lubrication performance of these formulations was then tested exptl. Clearly, alkyl glyceryl ethers showed a significantly improved performance (higher friction reduction) with increasing the alkyl chain length. However, the ethers had to be formulated with xanthan gum, with which they formed a complex, which promoted ether dispersion and probably adsorption on the metal surface in the aqueous phase, thereby drastically reducing friction. Thus, the alkyl glyceryl ethers synthesized in this work are attractive green and highly efficient lubricant additives, which can improve the sustainability of industrial lubrication processes.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects 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 C12H25Br, Application of 1-Bromododecane.

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

Sels, Bert F. published the artcileUse of WO₄^2- on layered double hydroxides for mild oxidative bromination and bromide-assisted epoxidation with H₂O₂, Name: 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of the American Chemical Society (2001), 123(34), 8350-8359, database is CAplus and MEDLINE.

Tungstate, exchanged on a (Ni,Al) layered double hydroxide, is applied as a heterogeneous catalyst in the oxidation of bromide with H₂O₂ and the ensuing electrophilic bromination of olefins. The high halogenation activity of the catalyst in essentially neutral conditions mimics the activity of V-bromoperoxidase enzymes. In water, aromatic and aliphatic olefins are selectively converted to bromohydrins; in methanol, methoxybromides are produced. In appropriate solvent conditions, the bromohydroxylation of geminally di-, tri-, and tetrasubstituted olefins proceeds via dehydrobromination to the epoxide. Evidence for this mechanism is provided by kinetic and labeling experiments This one-pot alternative for the two-step halohydrin epoxidation process is enabled by the mild pH conditions; bromide is effective in substoichiometric, catalytic amounts All new catalytic procedures are characterized by a high oxidative stability of the catalyst, high productivity of the catalyst on weight basis, high W turnover frequencies in ambient conditions (up to 50 mol of product per W per h), and high chemo-, regio-, and stereoselectivities.

Journal of the American Chemical Society 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 C5H10O2S, Name: 2,3-Dibromo-2,3-dimethylbutane.

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

Molander, Gary A. published the artcileSequential epoxide fragmentation/radical cyclizations mediated by samarium(II) iodide, COA of Formula: C7H13BrSi, the publication is Tetrahedron (1998), 54(22), 5819-5832, database is CAplus.

A sequential reductive coupling process promoted by samarium(II) iodide is described. Cascade epoxide ring opening and two sequential radical cyclizations lead to a variety of bicyclo[m.n.0] systems as mixtures of diastereomers. The cyclization of epoxide I gave II in 62% yield.

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

Liautard, Virginie published the artcileIn situ generation of radical initiators using amine-borane complexes for carbohalogenation of alkenes, Computed Properties of 401-55-8, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(13), 2124-2127, database is CAplus and MEDLINE.

Atom transfer radical addition of alkyl halides to alkenes was developed using a low amount of a stable initiator, amine borane complexes. Thanks to a slow hydroboration step, the overall carbohalogenation process led to good isolated yields.

Chemical Communications (Cambridge, United Kingdom) 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, Computed Properties of 401-55-8.

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