Category: bromides-buliding-blocks

Porres, Laurent published the artcileEnhanced two-photon absorption with novel octupolar propeller-shaped fluorophores derived from triphenylamine, HPLC of Formula: 21101-63-3, the publication is Organic Letters (2004), 6(1), 47-50, database is CAplus and MEDLINE.

Novel octupolar fluorophores derived from the sym. functionalization of a triphenylamine core with strong acceptor peripheral groups via phenylene-ethynylene linkers have been synthesized and shown to exhibit high fluorescence quantum yields, very large two-photon-absorption cross-sections in the red-NIR region, and suitable photostability.

Organic Letters published new progress about 21101-63-3. 21101-63-3 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,sulfides,Benzyl bromide,Benzene, name is (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, and the molecular formula is C8H6BrF3S, HPLC of Formula: 21101-63-3.

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

Miller, John C. published the artcileHeavy atom effects on the triplet lifetimes of naphthalene and phenanthrene, Synthetic Route of 52358-73-3, the publication is Journal of the American Chemical Society (1977), 99(25), 8175-9, database is CAplus.

Heavy-atom effects on triplet decay rates are reported for the 8 monohalonaphthalenes and for 11 monohalophenanthrenes. The decrease in the lifetime with substitution varies with the square of the at. spin-orbit coupling factor for the attached halogen. The position dependence is qual. related to the unpaired spin-d. distribution in the mol. Investigation of the lifetimes of 13 polyhalogenated naphthalenes and phenanthrenes indicate both pos. and neg. deviations from an additive model for heavy-atom effects. Substituent-induced shifts of the O-O band of the phosphorescence spectra are also tabulated.

Journal of the American Chemical Society published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Synthetic Route of 52358-73-3.

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

Noorani, Narmin published the artcileCarbon dioxide adsorption onto modified polyvinyl chloride with ionic liquid, Category: bromides-buliding-blocks, the publication is Journal of Polymer Engineering (2022), 42(6), 498-506, database is CAplus.

To modify polyvinylchloride membranes for carbon dioxide gas separation, six polyvinyl chloride-g-polyionic liquid ionomers such as polyvinylchloride-g-poly1-vinyl-3-hexylimidazolium bromide (PVC-g-P[VHIm][Br]), polyvinylchloride-g-poly1-vinyl-3-hexylimidazolium thiocyanate (PVC-g-P[VHIm][SCN]), polyvinylchloride-g-poly1-vinyl-3-hexylimidazolium tetrafluoroborate (PVC-g-P[VHIm][BF₄]), polyvinylchloride-g-poly1-vinyl-3-octylimidazolium bromide (PVC-g-P[VOIm][Br]), polyvinylchloride-g-poly1-vinyl-3-octylimidazolium thiocyanate (PVC-g-P[VOIm][SCN]) and polyvinylchloride-g-poly1-vinyl-3-octylimidazolium tetrafluoroborate (PVC-g-P[VOIm][BF₄]) were synthesized. The polyvinyl chloride-g-polyionic liquid ionomers were characterized using elemental analyzer (CHN) and Fourier transform IR spectroscopy (FTIR) techniques. CO₂ adsorption onto these ionomers was measured by quartz crystal microbalance (QCM) and the exptl. data were correlated by the sorption model. The parameters obtained imply that CO₂ adsorption has an exothermic and physisorption nature. Also, the investigations point to that the PVC-g-P[VHIm][SCN] has better performance for CO₂ separation

Journal of Polymer Engineering 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

Wang, Yipu published the artcileVisualizing Aβ deposits in live young AD model mice with a simple red/near-infrared-fluorescent AIEgen, Category: bromides-buliding-blocks, the publication is Science China: Chemistry (2022), 65(2), 339-352, database is CAplus.

Precise and early detection of β-amyloid (Aβ) deposits in situ and in real time is pivotal to the diagnosis and early intervention of Alzheimer’s disease (AD). Optical imaging stands out to be a promising technique for such a task; however, it still remains a big challenge, due to the lack of high-performance imaging contrast agent. Restricted by poor blood-brain barrier (BBB) penetrability, short-wavelength excitation and emission, as well as the aggregation-caused quenching effect, the widely used gold-standard probes cannot be used for early in-vivo imaging of Aβ deposits. Herein, we integrate the Aβ deposits-favored geometry, amphiphilic and zwitterionic mol. structure, extended D-π-A electronic structure, and 3D conformation into one mol., facilely establishing a simple and economic imaging contrast agent that enjoys high specificity and affinity to Aβ deposits, good BBB penetrability, bright red/near-IR fluorescence, low interference from autofluorescence, aggregation-induced emission (AIE) feature, high signal-to-noise ratio (SNR), and high contrast. In-vitro, ex-vivo, and in-vivo experiments with different strains of mice indicate that AIE-CNPy-AD holds the universality to Aβ deposits identification. Noteworthily, AIE-CNPy-AD is even able to precisely trace the small and sparsely-distributed Aβ deposits in AD model mice as young as 4-mo-old APP/PS1 mice, the youngest having Aβ deposits. Moreover, the present probe could clearly reveal the increase and enlargement of Aβ deposits as the mice grow. Therefore, AIE-CNPy-AD might be an ideal alternative for early AD diagnosis and highly reliable monitoring of AD progression.

Science China: Chemistry published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C15H12O6, Category: bromides-buliding-blocks.

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

Tanner, Dennis D. published the artcileReexamination of the reaction of a “graded set” of radicals with N-bromosuccinimide: a kinetic argument concerning the π, and ω states of succinimidyl, Product Details of C6H12Br2, the publication is Journal of the American Chemical Society (1985), 107(23), 6584-9, database is CAplus.

The NBS [N-bromosuccinimide] of CH₂Cl₂ with added substrates which yield stable radicals was reinvestigated. The proposal that these substrates would affect the ratio of BrCH₂CH₂CONCO (BPI)/CHCl₂Br, the solvent bromination product, was not substantiated. Bromination of Me₂CHCHMe₂, cyclohexene, and butadiene by NBS in CH₂Cl₂ plus H₂C:CCl₂ gives essentially the same BPI/CHCl₂Br ratios as in the presence of neopentane but large yields of brominated and polybrominated products. Similar reactions in the presence of up to 2.5 M C₆H₆ always yield BPI but also highly brominated benzene derivatives BPI is detected in the NBS bromination of CHCl₃ under all conditions and is the major product in the presence of H₂C:CCl₂ chloride. Photolysis of N-iodosuccinimide-I₂ in CHCl₃ gives ICH₂CH₂CONCO as the chief product. None of these observations support the hypothesis of σ and π states of the succinimidyl radical (S·), while the NBS results appear consistent with competing S·-Br· chains.

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 C12H16N2O2, Product Details of C6H12Br2.

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

Poslusney, Michael S. published the artcileSpirocyclic replacements for the isatin in the highly selective, muscarinic M₁ PAM ML137: The continued optimization of an MLPCN probe molecule, Category: bromides-buliding-blocks, the publication is Bioorganic & Medicinal Chemistry Letters (2013), 23(6), 1860-1864, database is CAplus and MEDLINE.

This Letter describes the further optimization of an MLPCN probe mol. (ML137) through the introduction of 5- and 6-membered spirocycles in place of the isatin ketone. Interestingly divergent structure-activity relationships, when compared to earlier M₁ PAMs, are presented. These novel spirocycles, e.g. I, possess improved efficacy relative to ML137, while also maintaining high selectivity for the human and rat muscarinic M₁ receptor subtype.

Bioorganic & Medicinal Chemistry Letters 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, Category: bromides-buliding-blocks.

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

Eckstein, Brian J. published the artcileButa-1,3-diyne-Based π-Conjugated Polymers for Organic Transistors and Solar Cells, Application In Synthesis of 303734-52-3, the publication is Macromolecules (Washington, DC, United States) (2017), 50(4), 1430-1441, database is CAplus.

We report the synthesis and characterization of new alkyl-substituted 1,4-di(thiophen-2-yl)buta-1,3-diyne (R-DTB) donor building blocks, based on the -CC-CC- conjugative pathway, and their incorporation with thienyl-diketopyrrolopyrrole (R’-TDPP) acceptor units into π-conjugated PTDPP-DTB polymers (P1-P4). The solubility of the new polymers strongly depends on the DTB and DPP solubilizing (R and R’, resp.) substituents. Thus, solution processable and high mol. weight PDPP-DTB polymers are achieved for P3 (R = n-C₁₂H₂₅, R’ = 2-butyloctyl) and P4 (R = 2-ethylhexyl, R’ = 2-butyloctyl). Systematic studies of P3 and P4 physicochem. properties are carried using optical spectroscopy, cyclic voltammetry, and thermal anal., revealing characteristic features of the dialkynyl motif. For the first time, optoelectronic devices (OFETs, OPVs) are fabricated with 1,3-butadiyne containing organic semiconductors. OFET hole mobilities and record OPV power conversion efficiencies for acetylenic organic materials approach 0.1 cm²/(V s) and 4% resp., which can be understood from detailed thin-film morphol. and microstructural characterization using AFM, TEM, x-ray diffraction, and GIWAXS methodologies. Importantly, DTB-based polymers (P3 and P4) exhibit, in addition to stabilization of frontier MOs and to -CC-CC- relief of steric torsions, discrete morphol. pliability through thermal annealing and processing additives. The advantageous materials properties and preliminary device performance reported here demonstrate the promise of 1,3-butadiyne-based semiconducting polymers.

Macromolecules (Washington, DC, United States) 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, Application In Synthesis of 303734-52-3.

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

D’yachenko, A. I. published the artcilePreparation of spiro[2.4]-4,6-heptadienes by the cycloalkylation of 1,3-cyclopentadiene with 1,2-dibromoalkanes under phase transfer catalysis conditions, Computed Properties of 594-81-0, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1984), 1664-6, database is CAplus.

Cycloalkylation of cyclopentadiene with RCHBrCHBrR¹ (R = R¹ = H, Me; R = H, R¹ = Me) in 50% aqueous NaOH containing PhCH₂NEt₃⁺ Cl^– in 1.1:1:4:0.005-0.02 molar ratio gave 70-85% title compounds (I; same R, R¹). No I were obtained with BrCMe₂ZBr (Z = CH₂, CHMe, CMe₂).

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya 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

Abd Karim, Nurul H. published the artcileSalphen metal complexes as tunable G-quadruplex binders and optical probes, Related Products of bromides-buliding-blocks, the publication is RSC Advances (2014), 4(7), 3355-3363, database is CAplus.

A series of seven new metal complexes (metal = Ni^II, Cu^II, Pt^II and VO²⁺) with substituted salphen ligands have been prepared and their duplex and G-quadruplex DNA affinities determined The selectivity of the complexes towards a given DNA topol. is dictated by several factors including geometry, overall charge and substitution pattern of the complex. Also the two platinum(II)-salphen complexes developed as part of this series are emissive. Confocal microscopy studies were carried out with these two complexes using four different cell lines (CHO, HeLa, U2OS and HepG2). The cell permeability and localization are different for the two probes and highly dependent on the cell line used.

RSC Advances published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C3H6BrNaO3S, Related Products of bromides-buliding-blocks.

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

Dong, Changshuai published the artcileAn n-type narrow-bandgap organoboron polymer with quinoidal character synthesized by direct arylation polymerization, COA of Formula: C4Br2N2O4S, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2022), 10(7), 2718-2723, database is CAplus.

Narrow bandgap conjugated polymers have received great attention due to their wide applications in optoelectronic devices. Because of the synthetic difficulty, it is greatly challenging to develop n-type conjugated polymers with a narrow bandgap with quinoidal character. Herein, we report an n-type narrow-bandgap organoboron polymer with quinoidal character, PBN-TP. PBN-TP is designed with alternating units of BNBP (double B ← N bridged bipyridine) and quinoidal TP (thieno[3,4-b]pyrazine). Direct arylation polymerization of the di-bromo BNBP unit and the di-hydro TP unit affords the organoboron polymer with a high number-average mol. weight of 28.3 kDa. Compared with the control polymer with alternating units of BNBP and thiophene, PBN-T, the replacement of the thiophene unit with a quinoidal TP unit reduces the bond length alternation (BLA) of carbon-carbon bonds and planarized the polymer backbone of PBN-TP, leading to an enhanced contribution of the polymer quinoidal resonance structure. As a result, compared with PBN-T, PBN-TP shows a much reduced bandgap of 1.50 eV, which is among the lowest reported for n-type organoboron polymers based on BNBP. Moreover, due to the low LUMO energy level, PBN-TP could be readily n-doped and used as an n-type polymer thermoelec. material. This work provides a new n-type narrow bandgap conjugated polymer with quinoidal character.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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, COA of Formula: C4Br2N2O4S.

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