Author: Jessica.F

Altona, Cornelis published the artcileConformation of open chain compounds. II. Dipole moments and conformational equilibrium of some vicinal dibromides, the benzene effect, Category: bromides-buliding-blocks, the publication is Recueil des Travaux Chimiques des Pays-Bas (1968), 87(3), 279-88, database is CAplus.

The dipole moments of 6 title compounds such as CH2BrCH2Br and Me3CHBrCH2Br, were measured in CCl4 and C6H6. The gauche Br….Br interaction energy was solvent dependent; its value was 380 ± 30 cal./mole lower in C6H6 than in CCl4.

Recueil des Travaux Chimiques des Pays-Bas 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, Category: bromides-buliding-blocks.

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

Altona, C. published the artcileConformation of open-chain compounds. III. Carbon-halogen stretching frequencies and conformation of some vicinal dihalides, Computed Properties of 594-81-0, the publication is Recueil des Travaux Chimiques des Pays-Bas (1969), 88(1), 33-42, database is CAplus.

Hal = halogen throughout. A study of the ir and Raman spectra of some vicinal dihaloethanes, propanes and butanes with predominant antiperiplanar orientation in the straight chain and branched series, reveals that the 2 C-Hal stretching frequencies occur characteristically as a more or less strongly coupled pair: an intense Raman band (νs) and a strong ir active mode of vibration (νas) at lower frequency. The C-Hal frequencies of the gauche conformations are weakly coupled. The position of the bands and the difference Δν = νs – νas are functions of the chem./geometrical structure in the vicinity of the C-Hal bonds. Empirical rules are presented by which the C-Hal frequencies or, in strongly coupled systems, the average frequency of anti as well as of gauche forms can be predicted with fair accuracy.

Recueil des Travaux Chimiques des Pays-Bas 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, Computed Properties of 594-81-0.

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

Bicciocchi, Erika published the artcileAn Alternating Donor-Acceptor Conjugated Polymer Based on Benzodithiophene and [3,4-c]pyrrole-4,6-dione: Synthesis, Characterization, and Application in Photovoltaic Devices, HPLC of Formula: 303734-52-3, the publication is Australian Journal of Chemistry (2015), 68(11), 1773-1782, database is CAplus.

The synthesis is described of a new alternating donor-acceptor semiconducting polymer based on an N-octylthieno[3,4-c]pyrrole-4,6-dione building block together with a newly designed 2,3-bis(2-ethylhexyl)thiophenylethynyl substituted benzodithiophene (BDT). The introduction of electron-rich thiophene units to BDT raises the HOMO level of the conjugated polymer and the concomitant reduction of the bandgap enhances the harvesting of solar radiation. This modification also introduces less sterically demanding triple bonds, thereby potentially enabling more favorable mol. interactions and an extra dimension of conjugation perpendicular to the main polymer chain. The optoelectronic properties of this new conjugated polymer were evaluated using UV-visible absorption and fluorescence spectroscopy, photoelectron spectroscopy in air, photo-induced charge extraction by linearly increasing voltage (Photo-CELIV), and d. functional theory calculations The polymer absorbs broadly in the wavelength range 300-700 nm in solution and the solid state. The estimated HOMO and LUMO levels of -5.4 and -3.6eV, resp., correspond to a bandgap of 1.8eV. Photovoltaic devices fabricated using the polymer as the active layer displayed power conversion efficiencies (PCEs) of up to 1%. Photo-CELIV results provide evidence that rapid recombination and poor charge mobility are likely contributing factors to the relatively low PCE values observed

Australian Journal of Chemistry published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, HPLC of Formula: 303734-52-3.

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

Patil, Nandkumar M. published the artcileHeterogenized copper catalysts for the amination of aryl halide: Synthesis, characterization and catalytic applications, Recommanded Product: Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), the publication is Applied Catalysis, A: General (2010), 372(1), 73-81, database is CAplus.

This research investigated the synthesis, characterization and catalytic activity of heterogenized copper complexes for the selective amination of aryl halides. Amination reactions using homogeneous copper catalyst systems are not generally selective and it is also difficult to recover the catalyst from the homogeneous system for recycling. To overcome these difficulties, our efforts were directed towards the development of cheaper heterogeneous catalyst systems, which can be easily recovered and recycled. Heterogenized analogs of the homogeneous Cu complexes were prepared using two methods: (a) encapsulation of copper complexes in zeolite-Y and (b) tethering of copper complexes on various supports like zeolite-Y, silica, charcoal, or clay. The encapsulated and tethered copper catalysts on zeolite-Y were characterized using EPR, diffuse reflectance UV-vis, XRD, IAS, ICPES, SEM, and TEM. The results confirmed that the copper complexes were truly heterogenized in zeolite-Y support. Encapsulated and tethered copper complexes were tested for amination of aryl iodide. The effects of various reaction parameters were examined using tethered Cu(Phen)(PPh₃)Br-PTA-Y catalyst to determine optimum conditions. A recycle study of encapsulated and tethered Cu catalyst was carried out to test their robustness for possible com. exploitation.

Applied Catalysis, A: General published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C30H24BrCuN2P, Recommanded Product: Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I).

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

Mishra, Anamika published the artcileSynthesis and properties of 3,4-dioxythiophene and 1,4-dialkoxybenzene based copolymers via direct C-H arylation: Dopant-free hole transport material for perovskite solar cells, Quality Control of 143-15-7, the publication is Journal of Polymer Science (Hoboken, NJ, United States) (2022), 60(6), 975-984, database is CAplus.

Direct C-H arylation coupling reaction has gained significant importance in synthesis of conjugated polymers for organic electronic applications. We report here a facile and straightforward method called “direct C-H arylation” reaction to synthesize conjugated 3,4-dioxythiophene and 1,4-dialkoxybenzene based copolymers as hole transport material (HTM) for perovskite solar cells. Two electron-rich conjugated polymers P1-2 were synthesized, in which 1,4-dibromo-2,5-bis(dodecyloxy)benzene and 3,4-dialkoxy-thiophene units were used for polymerization The resulting polymers were characterized and exhibited high solubility in organic solvents. Electrochem. and optical characterizations were carried out by cyclic voltammetry and UV-Vis-NIR absorption spectroscopy and found that these polymers show higher-lying HOMO energy levels with wide band gap. D. functional theory calculation was performed on these polymers (P 1-2) and correlated with our exptl. results. Finally, perovskite solar cells were fabricated by solution-processable deposition of P1-2 as dopant-free HTM with device geometry ITO/SnO₂/Perovskite/HTM(P1/P2)/Ag and achieved a maximum power conversion efficiency of 5.28%. This study provides information on designing and simple preparation by direct C-H arylation reaction of higher-lying HOMO energy level polymer as HTM for perovskite solar cells.

Journal of Polymer Science (Hoboken, NJ, United States) 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, Quality Control of 143-15-7.

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

Liu, Xin published the artcilePillared Metal-Organic Framework Initiating Intermolecular Atom-Transfer Radical Addition via Visible-Light-Induced Electron Transfer Activation of Haloalkanes, Recommanded Product: Ethylbromofluoroacetate, the publication is ACS Applied Materials & Interfaces (2021), 13(29), 34114-34123, database is CAplus and MEDLINE.

Herein, a novel metal-organic framework (MOF) with a pillared-layer structure was rationally synthesized to initiate intermol. atom-transfer radical addition (ATRA) via photoinduced electron transfer activation of haloalkanes. The MOF synthesized via the controllable pillared-layer method is of excellent visible-light absorption and high chem. stability. Photocatalytic experiments show the atom transfer of various alkyl halides (R-X, X = Cl/Br/I) onto diverse olefins was successfully achieved to produce functional ATRA products. The mechanism and exptl. investigations reveal the prepared MOF serves as an efficient photocatalyst with strong reduction potential to activate haloalkane substrates via photoinduced electron transfer, generating a highly reactive alkyl radical to trigger the ATRA reaction. Key events in the ATRA reaction, including alkyl radical photogeneration as well as halide transfer, have been further regulated to achieve preferable photocatalytic performance with higher yields, shorter reaction time, and desirable cycling capability. It is notable that the work is the first report on photoinduced electron transfer activation of halides by a MOF photocatalyst for the ATRA reaction, providing a new blueprint for MOFs to develop photoinduced radical reactions.

ACS Applied Materials & Interfaces 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, Recommanded Product: Ethylbromofluoroacetate.

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

Mei, Wenwen published the artcileSynthesis and protein-tyrosine phosphatase 1B inhibitory activity evaluation of indolepropyl based 1,3,4-oxadiazole derivatives, Recommanded Product: 4-Bromo-1-(bromomethyl)-2-fluorobenzene, the publication is Youji Huaxue (2016), 36(3), 533-539, database is CAplus.

A series of indolepropyl based 1,3,4-oxadiazole derivatives were synthesized by esterification, hydrazidation, cyclization and substitution using indolebutyric acid as starting material. The inhibitory activity against protein tyrosine phosphatase 1B (PTP1B) was evaluated. The results indicated that five compounds displayed obviously inhibitory effect against PTP1B in vitro, for instance, compound 5g exhibited the strongest PTP1B inhibitory activity with an IC₅₀ value of 6.74 μg·mL^-1. It was the first example of indolealkyl based oxadiazole derivatives showing PTP1B inhibitory activity.

Youji Huaxue published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, Recommanded Product: 4-Bromo-1-(bromomethyl)-2-fluorobenzene.

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

Wu, Shaoxiang published the artcileThe enantioselective trifluoromethylation of aromatic aldehydes by quaternary ammonium bromide and (IPr)CuF at low catalyst loading, HPLC of Formula: 76283-09-5, the publication is Journal of Fluorine Chemistry (2013), 19-29, database is CAplus.

A general catalytic enantioselective trifluoromethylation of aromatic aldehydes using (IPr)CuF and quinidine-derived quaternary ammonium salt as catalysts has been developed. A wide range of aromatic aldehydes are converted to the corresponding products in up to 92% yield and 81% ee at 2 mol% of catalyst loading.

Journal of Fluorine Chemistry published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C13H19Br2ClN2O, HPLC of Formula: 76283-09-5.

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

Liu, Zui published the artcileManipulated and Improved Photoinduced Deformation Property of Photoresponsive Liquid Crystal Elastomers by Copolymerization, Category: bromides-buliding-blocks, the publication is Macromolecular Rapid Communications (2022), 43(6), 2100717, database is CAplus and MEDLINE.

Photoresponsive liquid crystal elastomers (LCEs) have aroused much attention due to their unique structures, properties, and potential applications. However, many reported photoresponsive LCEs show small photoinduced deformation with a slow deformation speed, which limits their application to a certain extent. In this article, multiple hydrogen bond component and biphenyl component was introduced into photoresponsive LCEs bearing cyanostilbene by copolymerization, and prepared a series of LCEs CSm-BPn (CS and BP means cyanostilbene and biphenyl component, resp.; m, n means the content ratio of CS and BP). All uniaxially oriented CSm-BPn fibers show photoinduced deformation behavior under 365 nm UV light except for CS0-BP5. The introduction of hydrogen bond and the decrease of glass transition temperature realize large deformation and fast deformation speed. Besides, the properties of LCEs are successfully regulated by changing the content ratio of each component. What’s more interesting is that the addition of appropriate amount of biphenyl can significantly improve and manipulate the deformation property of the CSm-BPn fibers. The maximum bending angle can reach 175°, and the whole photoinduced deformation process only takes 11 s. The photoresponsive LCEs with such large bending angle and fast deformation rate are rarely reported.

Macromolecular Rapid Communications 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, Category: bromides-buliding-blocks.

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

Ji, Jian published the artcileBase-Induced Highly Regioselective Synthesis of N²-Substituted 1,2,3-Triazoles under Mild Conditions in Air, Recommanded Product: 1-Bromododecane, the publication is Organic Letters (2022), 24(1), 132-136, database is CAplus and MEDLINE.

A highly regioselective base-induced synthesis of N²-substituted 1,2,3-triazoles from N-sulfonyl-1,2,3-triazoles and alkyl bromides/alkyl iodides at room temperature is reported. An S_N2-like mechanistic pathway to explain the high N₂-regioselectivity is proposed. The protocol features a broad substrate scope and generates products in good to excellent yields (72-90%).

Organic Letters 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, Recommanded Product: 1-Bromododecane.

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