Tag: 300-400

《Visible-Light-Driven Nitrogen Radical-Catalyzed [3 + 2] Cyclization of Vinylcyclopropanes and N-Tosyl Vinylaziridines with Alkenes》 was published in Organic Letters in 2020. These research results belong to Zhao, Quan-Qing; Zhou, Xue-Song; Xu, Shuang-Hua; Wu, Ya-Li; Xiao, Wen-Jing; Chen, Jia-Rong. Formula: C19H18BrP The article mentions the following:

A visible light photoredox-promoted and nitrogen radical catalyzed [3 + 2] cyclization of vinylcyclopropanes and N-tosyl vinylaziridines with alkenes is developed. Key to the success of this process is the use of the readily tunable hydrazone as a nitrogen radical catalyst. Preliminary mechanism studies suggest that the photogenerated nitrogen radical undergoes reversible radical addition to the vinylcyclopropanes and N-tosyl vinylaziridines to enable their ring-opening C-C and C-N bond cleavage and ensuing cyclization with alkenes. In the experiment, the researchers used many compounds, for example, Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is an organophosphorus compound, with potential use as a precursor and a solvent in organic synthesis. And it is used widely for methylenation via the Wittig reaction.Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Reduction of CO2 by Hydrosilanes in the Presence of Formamidinates of Group 13 and 12 Elements》 was published in Organometallics in 2020. These research results belong to Huang, Weiheng; Roisnel, Thierry; Dorcet, Vincent; Orione, Clement; Kirillov, Evgueni. Synthetic Route of Br3In The article mentions the following:

Homoleptic complexes I-M of groups 13 and 12 elements (M = B-In and M = Zn, resp.) incorporating electron-withdrawing formamidinate ligands {(C6F5)N = CH-N(C6F5)}-({NCN}-) were synthesized and isolated in high yields. The compounds were characterized by X-ray crystallog., NMR spectroscopy and elemental anal. While single-component I-M appeared to be sluggishly active or inactive in reduction of CO2 with hydrosilanes, a good catalytic performance was achieved with the two-component systems derived from combinations of I-M and E(C6F5)3 (E = B, Al). In particular, the binary combination I-Al/B(C6F5)3 showed the best performance within the whole series, thus providing quant. hydrosilane (Et3SiH) conversions under a range of conditions (PCO2, temperature, benzene or bromobenzene solvents) and affording mainly CH2(OSiEt3)2 and CH4 as products. Kinetic and mechanistic studies revealed that at the initiation step the binary catalytic systems undergo a complex transformation in the presence of CO2/Et3SiH affording the products of I-Al decomposition, namely, (C6F5)N(H)SiEt3, (C6F5)N(Me)SiEt3, {NCN}-SiEt3 and also some unidentified aluminum species. Thus, the overall process of the reduction of CO2 with hydrosilanes is presumed to be catalyzed by complex multisite systems, evolved from the formamidinate precursor I-Al, implicating different tandem combinations of N-base/B(C6F5)3 with putative Al-containing species.Indium(III) bromide(cas: 13465-09-3Synthetic Route of Br3In) was used in this study.

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.Synthetic Route of Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Electric Literature of C12H7Br2NIn 2020 ,《Asymmetric Sulfonyldibenzene-Based Hole-Transporting Materials for Efficient Perovskite Solar Cells: Inspiration from Organic Thermally-Activated Delayed Fluorescence Molecules》 was published in ACS Materials Letters. The article was written by Qin, Tian; Wu, Fei; Ma, Dongyu; Mu, Yingxiao; Chen, Xiaojie; Yang, Zhiyong; Zhu, Linna; Zhang, Yi; Zhao, Juan; Chi, Zhenguo. The article contains the following contents:

Organic thermally-activated delayed fluorescence (TADF) materials have been widely applied in organic optoelectronics, biol. oxygen sensing, fluorescence probes, and imaging. Inspired by sulfonyldibenzene-based TADF materials with considerable charge transport abilities and distorted structures, we design and synthesize three sulfonyldibenzene-based mols. (CS-01, CS-02, and CS-03) as hole transport materials (HTMs) for perovskite solar cells (PSCs). The CS series HTMs are endowed with excellent thermal stability, good solubility, and suitable energy level matched with perovskite material. As a result, the CS-01-based PSC devices deliver an impressive power conversion efficiency (PCE) of 19.94% and excellent thermal stability. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Electric Literature of C12H7Br2N)

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.Electric Literature of C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 9,10-DibromoanthraceneIn 2021 ,《The performance of conjugated polymers as emitters for triplet-triplet annihilation upconversion》 appeared in Materials Advances. The author of the article were O’Shea, Riley; Gao, Can; Owyong, Tze Cin; White, Jonathan M.; Wong, Wallace W. H.. The article conveys some information:

A series of poly(phenylene-ethynylene) copolymers with various aryl spacer units were synthesized for use as emitters in triplet-triplet annihilation upconversion. The upconversion performance of these conjugated polymers was compared to that of well-known poly(phenylene-vinylene) polymers, MEH-PPV and super yellow, in chloroform solution The copolymer containing anthracene units outperformed both reference polymers recording a maximum upconversion quantum yield of 0.18%.9,10-Dibromoanthracene(cas: 523-27-3Recommanded Product: 9,10-Dibromoanthracene) was used in this study.

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.Recommanded Product: 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Decavoli, Cristina; Boldrini, Chiara L.; Trifiletti, Vanira; Luong, Sally; Fenwick, Oliver; Manfredi, Norberto; Abbotto, Alessandro published an article in 2021. The article was titled 《Dye-catalyst dyads for photoelectrochemical water oxidation based on metal-free sensitizers》, and you may find the article in RSC Advances.Reference of 3,6-Dibromo-9H-carbazole The information in the text is summarized as follows:

Dye-Sensitized Photoelectrochem. Cells (DS-PECs) have been emerging as promising devices for efficient solar-induced water splitting. In DS-PECs, dyes and catalysts for water oxidation and/or reduction are typically two sep. components, thus limiting charge transfer efficiency. A small number of organometallic dyes have been integrated with a catalyst to form an integrated dye-catalyst dyad for photoanodes, but until now no dyads based on metal-free organic dyes have been reported for photoanodes. We herein report the first example of dyad-sensitized photoanodes in DS-PEC water splitting based on metal-free organic dyes and a Ru catalyst. The di-branched donor-π-acceptor dyes carry a donor carbazole moiety which has been functionalized with two different terminal pyridyl ligands in order to coordinate a benchmark Ru complex as a water oxidation catalyst, affording water oxidation dyads. The two dyads have been fully characterized in their optical and electrochem. properties, and XPS has been used to confirm the presence of the catalyst bonded to the dye anchored to the semiconductor anode. The two dyads have been investigated in DS-PEC, showing an excellent faradaic efficiency (88% average across all cells, with a best cell efficiency of 95%), thus triggering new perspectives for the design of efficient mol. dyads based on metal-free dyes for DS-PEC water splitting. The experimental part of the paper was very detailed, including the reaction process of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Reference 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 in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Reference of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ruan, Hang; Guo, Zhongnan; Lin, Jiawei; Liu, Kunjie; Guo, Lingling; Chen, Xin; Zhao, Jing; Liu, Quanlin; Yuan, Wenxia published an article in 2021. The article was titled 《Structure and Optical Properties of Hybrid-Layered-Double Perovskites (C8H20N2)2AgMBr8 (M = In, Sb, and Bi)》, and you may find the article in Inorganic Chemistry.SDS of cas: 13465-09-3 The information in the text is summarized as follows:

The Pb-free hybrid-layered-double perovskites (HLDPs) have been proposed as green and stable semiconducting materials for optoelectronic devices, but the synthesized members are still limited. Here, we report the synthesis of three new HLDPs, (C8H20N2)2AgMBr8 (M = In, Sb, and Bi), by a solution method using 1,4-bis(ammoniomethyl)cyclohexane (C8H20N22+) as the organic spacing cation. All three of these HLDPs show 〈100〉-oriented layered structures with Ag and In/Sb/Bi order arranged in corner-sharing octahedral layers. The first-principle calculations indicate the indirect-gap nature of (C8H20N2)2AgInBr8 and (C8H20N2)2AgSbBr8, while their Bi counterpart shows a direct band gap after considering spin-orbit coupling. The band gaps obtained by diffuse-reflectance spectroscopy are 3.11, 2.60, and 2.70 eV for M = In, Sb, and Bi, resp. (C8H20N2)2AgInBr8 shows a broadband red emission centered at 690 nm, and it is mainly attributed to the self-trapped-excitons mechanism. Our results not only provide a series of new “”Pb-free”” HLDPs with chem. diversity but also help us to further understand the structure-property relationships of HLDP materials. The experimental part of the paper was very detailed, including the reaction process of Indium(III) bromide(cas: 13465-09-3SDS of cas: 13465-09-3)

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.SDS of cas: 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xu, Yong-Kai; Meng, Mei-Mei; Xi, Ji-Ming; Wang, Li-Fei; Zhu, Rui; Liu, Xing-Gui; Zhang, Rui; Dong, Wei; Lu, Zhen-Zhong; Zheng, He-Gen; Huang, Wei published an article in 2021. The article was titled 《Mixed matrix membranes containing fluorescent coordination polymers for detecting Cr2O72- with high sensitivity, stability and recyclability》, and you may find the article in Dalton Transactions.Related Products of 523-27-3 The information in the text is summarized as follows:

Three coordination polymers (CPs) were synthesized by using CdII, fluorescent 9,10-di(4-pyridyl)anthracene (dpa), and cyclohexane-1,4-dicarboxylic acid (H2cda), and they are [Cd2(dpa)2(cda)Cl2]n (1), [Cd(dpa)2(cda)]n (2) and [Cd(dpa)(cda)(H2O)]n (3). Both 1 and 2 are fluorescent and contain nonporous layers. 3 is an isomer of 2 and contains a porous diamondoid network. Fluorescent mixed matrix membranes were prepared by dispersing the particles of 1 or 2 within the matrix of polymethyl methacrylate, and showed high sensitivity and selectivity for detecting Cr2O72- in water. Both stability and recyclability of the MMMs were remarkably higher than those of the CP powders. In the experiment, the researchers used many compounds, for example, 9,10-Dibromoanthracene(cas: 523-27-3Related Products of 523-27-3)

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%.Related Products of 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sun, Qing; Lu, Feng-Hui; Ni, Hong-Gang published an article in 2021. The article was titled 《Microplastic-water partitioning of two states halogenated PAHs: Solute and sol》, and you may find the article in Environmental Research.Formula: C14H8Br2 The information in the text is summarized as follows:

The complex interactions of contaminants with microplastics significantly affect ecol. risk assessments. Studies of the sorption behavior of freely dissolved hydrophobic organic contaminants (HOCs) on microplastics are common. However, concentrations of HOCs in the actual aquatic environment sometimes exceed their water solubility A possible explanation is that a microplastic-sol-water three-phase medium (TPM) is formed in the actual water environment. Both states HOCs (in solute and sol) have the potential to migrate to particles suspended in water. To confirm this view, four kinds of microplastics and eight halogenated polycyclic aromatic hydrocarbons (HPAHs) were selected to examine the partitioning of HPAHs between microplastics and water (sol and solute). Both monolayer and multilayer coverage of HPAHs onto microplastics occurred, and chem. sorption dominated the pseudo-sorption mechanism. The microplastic-water partition ratios of HPAHs (0.12-0.74) were approx. four to five orders of magnitude lower than their corresponding KOW values, suggesting that mechanisms other than sorption were involved. Apparently, the sol HPAHs contributed almost identically large increments to both microplastics and water, and closed the gap. For microplastic-supported HPAHs, the contribution of the sol fraction was more than triple that of the dissolved fraction; the key influencing factor was the water solubility of HPAHs. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Formula: C14H8Br2)

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%.Formula: C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Synthesis of a C1-C12 Fragment of Gulmirecin B》 were Rengarasu, Rathikrishnan; Maier, Martin E.. And the article was published in Synlett in 2019. Application of 1530-32-1 The author mentioned the following in the article:

The synthesis of a C1-C14 fragment I of the macrolide antibiotic gulmirecin B through formation of the C7-C8 bond by addition of a vinyllithium intermediate to a C1-C7 aldehyde was investigated. This crucial coupling was successful with a vinyllithium reagent corresponding to a C8-C12 fragment. The C8-C12 vinyl bromide II was prepared from L-malic acid. The C1-C7 aldehyde III building block was synthesized from hex-5-enoic acid by using an Evans alkylation, a cross-metathesis, and an asym. dihydroxylation as key steps. In the experimental materials used by the author, we found Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application of 1530-32-1)

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 of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,ACS Catalysis included an article by de Orbe, M. Elena; Zanini, Margherita; Quinonero, Ophelie; Echavarren, Antonio M.. SDS of cas: 13465-09-3. The article was titled 《Gold- or Indium-Catalyzed Cross-Coupling of Bromoalkynes with Allylsilanes through a Concealed Rearrangement》. The information in the text is summarized as follows:

The gold(I)-catalyzed reaction of bromoalkynes with allylsilanes gives 1,4-enynes in a formal cross-coupling reaction. Mechanistic studies revealed the involvement of gold(I) vinylidenes or vinylidenephenonium gold(I) cations depending on the substituent on the bromoalkyne. In the case of bromo arylalkynes, the vinylidenephenonium gold(I) cations lead to 1,4-enynes via a 1,2-aryl rearrangement. The same reactivity has been observed in the presence of InBr3. In the part of experimental materials, we found many familiar compounds, such as Indium(III) bromide(cas: 13465-09-3SDS of cas: 13465-09-3)

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.SDS of cas: 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary