Tag: 300-400

Villatoro, Emmanuel; Munoz-Rugeles, Leonardo; Duran-Hernandez, Jesus; Salcido-Santacruz, Bernardo; Esturau-Escofet, Nuria; Lopez-Cortes, Jose G.; Ortega-Alfaro, M. Carmen; Peon, Jorge published an article in 2021. The article was titled 《Two-photon induced isomerization through a cyaninic molecular antenna in azo compounds》, and you may find the article in Chemical Communications (Cambridge, United Kingdom).Reference of Methyltriphenylphosphonium bromide The information in the text is summarized as follows:

We present a new design for non-linear optically responsive mols. based on a modular scheme where a polymethinic antenna section with important two-photon absorption properties is bonded to an isomerizable actuator section composed of a stilbenyl-azopyrrole unit. Upon two photon excitation, energy migration from the antenna-localized second singlet excited state to the stilbenyl-azopyrrole section allows for efficient indirect excitation and phototransformation of this actuator. In the experiment, the researchers used Methyltriphenylphosphonium bromide(cas: 1779-49-3Reference of Methyltriphenylphosphonium bromide)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is a lipophilic molecule with a cation allowing for it to be used to deliver molecules to specific cell components. Also considered an antineoplastic agent.Reference of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yamashiro, Toshiki; Abe, Takumi; Tanioka, Masaru; Kamino, Shinichiro; Sawada, Daisuke published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《Cis-3-Azido-2-methoxyindolines as safe and stable precursors to overcome the instability of fleeting 3-azidoindoles》.Reference of Indium(III) bromide The article contains the following contents:

A general and concise approach for tackling this problem by using 3-azidoindole surrogated. The surrogated was bench-stable, presumably due to the observed intramol. O-Nβ bonding. The resultant fleeting intermediates underwent capturing in-situ to afford 3-substitued indoles through formal ipso-substitution of the azide group by nucleophiles. In these investigations, the fleeting 3-azidoindoles showed a C3-electrophilic character for the first time. In the experiment, the researchers used Indium(III) bromide(cas: 13465-09-3Reference of Indium(III) bromide)

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Reference of Indium(III) bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Bera, Sourav Sekhar; Bahukhandi, Srishti Ballabh; Empel, Claire; Koenigs, Rene M. published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《Catalyst-controlled site-selective N-H and C3-arylation of carbazole via carbene transfer reactions》.Application In Synthesis of 3,6-Dibromo-9H-carbazole The article contains the following contents:

A site-selective direct arylation reaction of carbazole and other N-heterocycles with diazo-naphthalen-2(1H)-ones was developed. While Au(I)-NHC catalysts led to selective C3-arylation, palladium acetate allowed for selective N-H arylation, displaying complete site-selectivity each. To show the applicability of these arylation reactions, one-pot, two-fold diarylation reactions of carbazole were demonstrated. In the experiment, the researchers used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Application In Synthesis of 3,6-Dibromo-9H-carbazole)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent. And it has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Application In Synthesis of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Bi- and poly(carbyne) functionalised polycyclic aromatics》 was written by Frogley, Benjamin J.; Hill, Anthony F.; Seitz, Antonia. SDS of cas: 523-27-3 And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020. The article conveys some information:

Complexes where a central polyaromatic ring system is substituted with one to four W carbynes were prepared by Pd0/Au(I)-mediated coupling between a W stannylcarbyne and aryl halides. This strategy enables preparation of complexes with one to three carbynes substituted onto a single Ph ring, the 1st anthracenyl mono- and bis-carbynes, and a tetra(carbyne) complex constructed about a central pyrene ring system. The experimental part of the paper was very detailed, including the reaction process of 9,10-Dibromoanthracene(cas: 523-27-3SDS of cas: 523-27-3)

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.SDS of cas: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Chemical Communications (Cambridge, United Kingdom) included an article by Kawano, Shin-ichiro; Kawada, Sae; Kitagawa, Yasutaka; Teramoto, Rena; Nakano, Masayoshi; Tanaka, Kentaro. Quality Control of 3,6-Dibromo-9H-carbazole. The article was titled 《Near-infrared absorption by intramolecular charge-transfer transition in 5,10,15,20-tetra(N-carbazolyl)porphyrin through protonation》. The information in the text is summarized as follows:

A porphyrin coupled quadruply with N-carbazolyl groups at the meso positions was synthesized. Because of the electron-withdrawing nature of the carbazole units at the porphyrin center, the tetra(N-carbazolyl)porphyrin and the protonated derivative display unique absorption bands derived from intramol. charge-transfer transition from the carbazoles to the porphyrin moiety. After reading the article, we found that the author used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Quality Control of 3,6-Dibromo-9H-carbazole)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Quality Control of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Application In Synthesis of Ethyltriphenylphosphonium bromideIn 2022 ,《Regio-regular and cross-conjugated poly(thienylene vinylene)s through acyclic diene metathesis》 appeared in Journal of Polymer Science (Hoboken, NJ, United States). The author of the article were Bader, Yousef M. Katba; Guan, Chao; Qin, Yang. The article conveys some information:

Poly(thienylene vinylene)s (PTV’s) are early examples of conjugated polymers but have not been extensively studied when compared with closely analogous polythiophenes. PTV’s synthesized through previously reported techniques are similar in structures that contain various alkyl or alkoxy side-chains that exert limited impact on the polymer electronic properties. Herein, we report the preparation of a series of regio-regular PTV’s (rr-PTV’s) bearing cross-conjugated side-chains through ADMET polymerization of a common brominated di(thienylene vinylene) (DTV) monomer followed by PPM reactions on the resulting brominated PTV. These new polymers contain a bulky silyloxy alkyl side-chain and a functionalized thiophene moiety on every main-chain thiophene unit, and their regio-regular placement is confirmed by NMR spectroscopy. The thienyl based side-groups broaden polymer absorption ranges and at the same time lead to uncommon emission properties that are results of light-induced charge transfer events between the polymer main-chains and side-chains. Removal of the silyl groups on one of these rr-PTV’s led to insoluble materials and x-ray diffraction experiments on the collected solids displayed distinct scattering peaks that are absent from similarly functionalized regio-random PTV’s reported previously, thus suggesting better crystallinity originated from regio-regularity. In the experiment, the researchers used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application In Synthesis of Ethyltriphenylphosphonium bromide)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.Application In Synthesis of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Roy, Rupam; Khan, Aasif; Dutta, Tanoy; Koner, Apurba Lal published an article in 2022. The article was titled 《Red to NIR-emissive anthracene-conjugated PMI dyes with dual functions: singlet-oxygen response and lipid-droplet imaging》, and you may find the article in Journal of Materials Chemistry B: Materials for Biology and Medicine.Quality Control of 9,10-Dibromoanthracene The information in the text is summarized as follows:

The rich chem. of solution-processable red and near-IR organic emitters has emerged as an attractive and progressive research field because of their particular applications in organic optoelectronics and bioimaging. Three PMI-based fluorophores were synthesized via conjoining anthracene and donor moieties (-Ph, -N,N-PhNMe2) with a PMI core via an acetylene linkage at the peri-position, which helped to attain extensive electronic conjugation, which was reflected in red and NIR-emission in solution The key mol. features to be highlighted here are: all three dyes are strongly emissive in solution, as unveiled by the excellent absolute fluorescence QYs; and they possess tuneable emission properties, guided by the donor strength and a profound Stokes shift. The three fluorescent dyes demonstrated appreciable singlet-oxygen (1O2) sensitivity when photoirradiated with methylene blue (MB) in solution, showing a substantial blue-shift in emission in a ratiometric manner. Further, the treatment of dye-MB solution with alpha-tocopherol (1O2 scavenger) validated the presence of 1O2 as the only oxidizing species generated by MB in solution Computational investigations gave insight into the twisting of donor moieties in their ground-state optimized geometries, the modulation of the FMO energy gap, and the thermodn. feasibility of the 1O2 reaction. Finally, via taking advantage of the red and NIR-emission, we successfully utilized one of the fluorophores as a lipid-droplet marker for bioimaging in HepG2 cells. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Quality Control of 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) can be sublimated and oxidized to generate anthraquinone. Soluble in hot benzene and hot toluene, slightly soluble in alcohol, ether and cold benzene, insoluble in water.Quality Control of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Wan; Chasing, Pongsakorn; Benchaphanthawee, Wachara; Nalaoh, Phattananawee; Chawanpunyawat, Thanyarat; Kaiyasuan, Chokchai; Kungwan, Nawee; Namuangruk, Supawadee; Sudyoadsuk, Taweesak; Promarak, Vinich published an article in 2021. The article was titled 《Intramolecular hydrogen bond-enhanced electroluminescence performance of hybridized local and charge transfer (HLCT) excited-state blue-emissive materials》, and you may find the article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices.Application In Synthesis of 9,10-Dibromoanthracene The information in the text is summarized as follows:

The hybridized local and charge transfer (HLCT) excited state is a successful strategy to produce both high external and internal quantum efficiencies. Based on the HLCT scheme, two isomeric donor-acceptor (D-A)-type excited-state intramol. proton transfer (ESIPT) chromophores of o-hydroxyphenyl phenanthroimidazole (HPI)-based emissive mols. (mTAHPI and pTAHPI) and their OH-protected derivatives (pTAPI) were designed and explored for organic light-emitting diodes (OLEDs). The photophys. study and d. functional theory (DFT) calculations revealed that all mols. possessed the HLCT excited-state characters without exhibiting ESIPT photophys. properties, whereas the NMR spectroscopy, single-crystal and phys. property analyses discovered the existence of strong intramol. H bonds and intermol. interactions in both mTAHPI and pTAHPI. Consequently, their OLEDs displayed blue emissions with a narrow full width at half maximum (65-68 nm) and achieved excellent electroluminescence (EL) performance with a low turn-on voltage of 2.8 V. Particularly, pTAHPI-based devices showed the highest maximum external quantum effciency (EQE) of 8.13% with an ultra-high brightness of 18 100 cd m-2. The maximum singlet exciton utilization efficiency (ηs) of the device was estimated to be as high as 94%, which is among the best results of blue electroluminescence to our knowledge. After reading the article, we found that the author used 9,10-Dibromoanthracene(cas: 523-27-3Application In Synthesis of 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Application In Synthesis of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Wang, Yu-Cheng; Kegel, Laurel L.; Knoff, David S.; Deodhar, Bhushan S.; Astashkin, Andrei V.; Kim, Minkyu; Pemberton, Jeanne E. published an article in Journal of Materials Chemistry B: Materials for Biology and Medicine. The title of the article was 《Layered supramolecular hydrogels from thioglycosides》.Reference of Indium(III) bromide The author mentioned the following in the article:

Low mol. weight hydrogels are made of small mols. that aggregate via noncovalent interactions. Here, comprehensive characterization of the phys. and chem. properties of hydrogels made from thioglycolipids of the disaccharides lactose and cellobiose with simple alkyl chains is reported. While thiolactoside hydrogels are robust, thiocellobioside gels are metastable, precipitating over time into fibrous crystals that can be entangled to create pseudo-hydrogels. Rheol. confirms the viscoelastic solid nature of these hydrogels with storage moduli ranging from 10-600 kPa. Addnl., thiolactoside hydrogels are thixotropic which is a desirable property for many potential applications. Freeze-fracture electron microscopy of xerogels shows layers of stacked sheets that are entangled into networks. These structures are unique compared to the fibers or ribbons typically reported for hydrogels. Differential scanning calorimetry provides gel-to-liquid phase transition temperatures ranging from 30 to 80°C. Prodan fluorescence spectroscopy allows assignment of phase transitions in the gels and other lyotropic phases of high concentration samples. Phase diagrams are estimated for all hydrogels at 1-10 wt% from 5 to ≥ 80°C. These hydrogels represent a series of interesting materials with unique properties that make them attractive for numerous potential applications. In the experiment, the researchers used many compounds, for example, Indium(III) bromide(cas: 13465-09-3Reference of Indium(III) bromide)

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Reference of Indium(III) bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Ultrafine silver nanoparticles supported on a covalent carbazole framework as high-efficiency nanocatalysts for nitrophenol reduction》 was written by Gong, Wei; Wu, Qianqian; Jiang, Guoxing; Li, Guangji. Related Products of 6825-20-3This research focused onultrafine silver nanoparticle covalent carbazole framework support; nanocatalyst nitrophenol reduction. The article conveys some information:

A novel conjugated microporous polymer (CMP) material CZ-TEB was synthesized with a carbazole analog and 1,3,5-triethynylbenzene. It possessed a high sp. surface area, excellent thermal stability and layered-sheet morphol. Furthermore, ultrafine silver nanoparticles were successfully immobilized on CZ-TEB, thus preparing a nanocatalyst Ag0@CZ-TEB. To evaluate its catalytic performance, Ag0@CZ-TEB was exploited in the reduction reaction of nitrophenols, a family of priority pollutants. Ag0@CZ-TEB exhibited high catalytic ability, convenient recovery and excellent reusability. Strikingly, the normalized rate constant (knor) of the reduction reaction of 4-NP to 4-AP is as high as 21.49 mmol-1 s-1. This result shows a significant improvement over all previously reported work. We purposed to use a “”capture-release”” model to explain the high catalytic ability of Ag0@CZ-TEB. This explanation is supported by further exptl. results that agree well with the “”capture-release”” model. The experimental process involved the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Related Products of 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Related Products of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary