Tag: 300-400

The author of 《Novel Features of 9-Methylene-9H-thioxanthene (MTAE) in Living Anionic Polymerization》 were Chang, Shuang; Han, Li; Ma, Hongwei; Bai, Hongyuan; Li, Cun; Liu, Pibo; Yang, Lincan; Shen, Heyu; Li, Chao; Zhang, Songbo. And the article was published in Macromolecular Chemistry and Physics in 2019. COA of Formula: C19H18BrP The author mentioned the following in the article:

For this study, a new epithio-1,1-diphenylethylene (DPE) derivative, namely, 9-Methylene-9H-thioxanthene (MTAE), is synthesized, and its copolymerization reactions are investigated, showing distinctive features in living anionic copolymerization At room temperature and hydrocarbon solvents, MTAE cannot be copolymerized with styrene (St) but can be copolymerized with 1,4-divinylbenzene (DVB), forming a linear alternating copolymer. Based on this finding, ter-polymerization of MTAE, DVB and St is conducted to generate a special alternating structure. Addnl., MTAE is found to exhibit fairly high reactivity in copolymerization with Isoprene (Ip) under the same conditions. An alternating sequence of alt-MTAE/Ip containing high trans-geometric Ip content (76% of trans-1,4) and a di-block sequence of alt-MTAE/Ip-b-Ip are easily obtained. Its exptl. reactivity ratio with Ip is investigated via the in situ 1H NMR method (rIp = 0.28), and the corresponding kinetic behaviors and sequence structure are elucidated. Finally, the origin of the effect of MTAE on the isomerism of Ip during chain propagation is investigated by d. functional theory (DFT) calculations, and it is found that the bridge sulfur atom in MTAE interacts strongly with living species. This special finding provides a novel approach for the sequence regulation, precise functionalization, and stereo-structure control in living anionic polymerization originating from monomer structure design. The experimental process involved the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3COA of Formula: C19H18BrP)

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.COA of Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Kashino, Tsubasa; Haruki, Rena; Uji, Masanori; Harada, Naoyuki; Hosoyamada, Masanori; Yanai, Nobuhiro; Kimizuka, Nobuo published an article in ACS Applied Materials & Interfaces. The title of the article was 《Design Guidelines for Rigid Epoxy Resins with High Photon Upconversion Efficiency: Critical Role of Emitter Concentration》.Related Products of 523-27-3 The author mentioned the following in the article:

For the practical application of triplet-triplet annihilation-based photon upconversion (TTA-UC), the development of rigid, transparent, air-stable, and moldable materials with a high TTA-UC efficiency remains a challenging issue. In addition to the noncovalent introduction of ionic liquid emitters into the epoxy network, we covalently introduce emitters with polymerization sites to increase the emitter concentration to 35.6 wt %. A TTA-UC quantum yield ΦUC of 5.7% (theor. maximum: 50%) or a TTA-UC efficiency ηUC of 11.4% (theor. maximum: 100%) is achieved, which is the highest value ever achieved for a rigid polymer material. More importantly, the high emitter concentration speeds up the triplet diffusion and suppresses the back energy transfer from the emitter to sensitizer so that the sensitized emitter triplet can be effectively utilized for TTA. The generality of our finding is also confirmed for epoxy resins of similar emitter unit concentrations without the ionic liquid This work provides important design guidelines for achieving highly efficient TTA-UC in rigid solid materials, which has been very difficult to achieve in the past. Furthermore, the solid-state TTA-UC exhibits high air stability, reflecting the high oxygen barrier performance of epoxy resins. The high moldability of epoxy resins allows the construction of upconversion materials with complex geometries at nano- to macroscopic scales. In the part of experimental materials, we found many familiar compounds, such as 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

Schafer, Thomas C.; Becker, Jonathan; Seuffert, Marcel T.; Heuler, Dominik; Sedykh, Alexander E.; Mueller-Buschbaum, Klaus published an article in 2022. The article was titled 《Iodine-Chemisorption, Interpenetration and Polycatenation: Cationic MOFs and CPs from Group 13 Metal Halides and Di-Pyridyl-Linkers》, and you may find the article in Chemistry – A European Journal.Category: bromides-buliding-blocks The information in the text is summarized as follows:

Eight cationic, two-dimensional metal-organic frameworks (MOFs) were synthesized in reactions of the group 13 metal halides AlBr3, AlI3, GaBr3, InBr3 and InI3 with the dipyridyl ligands 1,2-di(4-pyridyl)ethylene (bpe), 1,2-di(4-pyridyl)ethane (bpa) and 4,4′-bipyridine (bipy). Seven of them follow the general formula 2∞[MX2(L)2]A, M = Al, In, X = Br, I, A-=[MX4]-, I-, I3-, L = bipy, bpa, bpe. Thereby, the porosity of the cationic frameworks can be used to take up the heavy mol. iodine in gas-phase chemisorption vital for the capture of iodine radioisotopes. This is achieved by switching between I- and the polyiodide I3- in the cavities at room temperature, including single-crystal-to-single-crystal transformation. The MOFs are 2-dimensional networks that exhibit (4,4)-topol. in general or (6,3)-topol. for 2∞[(GaBr2)2(bpa)5][GaBr4]2·bpa. The two-dimensional networks can either be arranged to an inclined interpenetration of the cationic two-dimensional networks, or to stacked networks without interpenetration. Interpenetration is accompanied by polycatenation. Due to the cationic character, the MOFs require the counterions [MX4]-, I- or I3- counterions in their pores. Whereas the [MX4]-, ions are immobile, iodide allows for chemisorption. Also, eight addnl. coordination polymers and complexes were identified and isolated that elaborate the reaction space of the herein reported syntheses. In the part of experimental materials, we found many familiar compounds, such as Indium(III) bromide(cas: 13465-09-3Category: bromides-buliding-blocks)

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.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mandal, Tanumoy; Azim, Aznur; Das, Sanju; De Sarkar, Suman published an article in 2022. The article was titled 《Organophotoredox Catalyzed Stereoselective Nitration of Olefins with tert-Butyl Nitrite under Air》, and you may find the article in Asian Journal of Organic Chemistry.Application In Synthesis of Ethyltriphenylphosphonium bromide The information in the text is summarized as follows:

An efficient method for the E-selective synthesis of nitroolefins was developed by employing DDQ as the organophotoredox catalyst in combination with tert-BuONO (TBN) as a nitrating agent under visible-light irradiation This green transition metal-free approach utilizes aerial oxygen as the terminal oxidant and occurs at room temperature Following the established protocol, 41 different olefines containing broad diversity of substituents were nitrated in good to excellent yields. Mechanistic experiments and photophys. studies revealed the probable mechanism. 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. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Application In Synthesis of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Tsukamoto, Takamasa; Imaoka, Takane; Yamamoto, Kimihisa published an article in 2021. The article was titled 《Unique Functions and Applications of Rigid Dendrimers Featuring Radial Aromatic Chains》, and you may find the article in Accounts of Chemical Research.Electric Literature of Br3In The information in the text is summarized as follows:

Conspectus: Dendrimers, which are highly branched polymers and regarded as huge single mols., are interesting substances from the aspect of not only polymer chem. but also mol. chem. Various applications in material science and life science have been investigated by taking advantage of the radially layered structures and intramol. nanospaces of dendrimers. Most dendrimers have flexible structures that originate from their organic chains which contain many sp3-type atoms, while relatively rigid dendrimers composed only of sp2-type atoms have rarely been reported. It has been recently clarified that such rigid dendrimers exhibit a specific aromatic property not found in other materials. Dendritic phenylazomethines (DPAs), as one of the rigid dendrimers, have only sp2-type C and N atoms and possess a radially branched π-conjugation system in their own macromol. chains. Such geometric and electronic structures heighten the electron d. at the core of the dendrimer and induce an intramol. potential gradient, which affords unique reactivities that lead to extraordinary functions. This unique property of the rigid dendrimers can be regarded as a new atypical electronic state based on radial aromatic chains not found in conventional aromatic compounds containing spherical aromaticity, Mobius aromaticity, metal aromaticity, and conductive polymers. Therefore, this as-yet-unknown characteristic is expected to contribute to the further development of fundamental and materials chem. In this Account, we highlight the rigid DPA dendrimers and their peculiar atomically precise and selective assembly behaviors that originate from the radial aromatic chains. One of the most noteworthy attainments based on the radial aromatic chains is the precise synthesis of a multimetallic multinuclear complex of a dendrimer containing a total of 13 elements. Next, we describe the electrochem. and catalytic functionalization of such multinuclear dendrimer complexes and the construction of supramol. nanoarchitectures by the polymerization of DPAs. These complexes exhibit encapsulation-release switching of guests and additive-free catalytic ability similar to proteins and enzymes. Such selective and accurate control of the intramol. assembly of guests and the intermol. arrangement of hosts realized by the radial aromatic chains of dendrimers will enable supramol. chem. and biochem. to be linked from a new aspect. In addition, the multimetallic multinuclear complexes of dendrimers afford a novel approach to precisely synthesize subnanoparticles with ultrasmall particle sizes (1 nm) that have been tech. difficult to obtain by conventional nanotechnol. We discuss the method for the synthesis of these subnanoparticles with well-controlled atomicity and composition using DPA complexes as a template, and recent advances to reveal their specific phys. and chem. properties. These results suggest that the unique electronic states induced in such radial aromatics could play an important role in the development of next-generation chem. In addition to this study using Indium(III) bromide, there are many other studies that have used Indium(III) bromide(cas: 13465-09-3Electric Literature of Br3In) was used in this study.

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.Electric Literature of Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Orthogonally Bimetallized Phosphane-ene Photopolymer Networks》 was written by Beland, Vanessa A.; Ragogna, Paul J.. Synthetic Route of Br3In And the article was included in Chemistry – A European Journal in 2020. The article conveys some information:

The development of batteries and fuel cells has brought to light a need for carbon anode materials doped homogeneously with electrocatalytic metals. In particular, combinations of electrocatalysts in carbon have shown promising activity. A method to derive functional carbon materials is the pyrolysis of metallopolymers. This work describes the synthesis of a bifunctional phosphonium-based system derived from a phosphane-ene network. The olefin functionality can be leveraged in a hydrogermylation reaction to functionalize the material with Ge. Unaffected by this radical addition, the bromide counterion of the phosphonium cation can be used to subsequently incorporate a second metal in an ion-complexation reaction with CuBr2. The characterization of the polymers and the derived ceramics are discussed.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

Application In Synthesis of 9,10-DibromoanthraceneIn 2021 ,《Tackling Solubility Issues in Organic Synthesis: Solid-State Cross-Coupling of Insoluble Aryl Halides》 was published in Journal of the American Chemical Society. The article was written by Seo, Tamae; Toyoshima, Naoki; Kubota, Koji; Ito, Hajime. The article contains the following contents:

Conventional organic synthesis generally relies on the use of liquid organic solvents to dissolve the reactants. Therefore, reactions of sparingly soluble or insoluble substrates are challenging and often ineffective. The development of a solvent-independent solid-state approach that overcomes this longstanding solubility issue would provide innovative synthetic solutions and access to new areas of chem. space. Here, we report extremely fast and highly efficient solid-state palladium-catalyzed Suzuki-Miyaura cross-coupling reactions via a high-temperature ball-milling technique. This solid-state protocol enables the highly efficient cross-couplings of insoluble aryl halides with large polyaromatic structures that are barely reactive under conventional solution-based conditions. Notably, we discovered a new luminescent organic material with a strong red emission. This material was prepared via the solid-state coupling of Pigment violet 23, a compound that has so far not been involved in mol. transformations due to its extremely low solubility This study thus provides a practical method for accessing unexplored areas of chem. space through mol. transformations of insoluble organic compounds that cannot be carried out by any other approach. 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 a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.Application In Synthesis of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthetic Route of C14H8Br2In 2020 ,《Edge-On Self-Assembly of Tetra-bromoanthracenyl-porphyrin on Silver Surfaces》 was published in Journal of Physical Chemistry C. The article was written by Kalashnyk, Nataliya; Daher Mansour, Michel; Pijeat, Joffrey; Plamont, Remi; Bouju, Xavier; Balaban, Teodor Silviu; Campidelli, Stephane; Masson, Laurence; Clair, Sylvain. The article contains the following contents:

Mol. self-assembly on surfaces is driven by the range of interactions between the mols. themselves and the substrate. Generally, a face-on structure is favored for aromatic mols. lying flat on the surface. Here, the authors report on the supramol. self-assembly of 5,10,15,20-tetrakis(10-bromoanthracen-9-yl)porphyrin on the Ag(111) and Ag(110) surfaces. Well-ordered mol. chains were observed by room-temperature scanning tunneling microscopy on both surfaces. The relatively small size of the unit cell revealed an edge-on configuration of the porphyrin macrocycles, i.e., perpendicular to the surface plane, as confirmed by mol. mechanics calculations Distinct intermol. interactions were found on the 2 surfaces, providing different mol. chain orientations on Ag(111) and Ag(110). The experimental part of the paper was very detailed, including the reaction process of 9,10-Dibromoanthracene(cas: 523-27-3Synthetic Route of C14H8Br2)

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.Synthetic Route of C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

HPLC of Formula: 13465-09-3In 2021 ,《High-Rate Long Cycle-Life Li-Air Battery Aided by Bifunctional InX3 (X = I and Br) Redox Mediators》 appeared in ACS Applied Materials & Interfaces. The author of the article were Rastegar, Sina; Hemmat, Zahra; Zhang, Chengji; Plunkett, Samuel; Wen, Jianguo; Dandu, Naveen; Rojas, Tomas; Majidi, Leily; Misal, Saurabh N.; Ngo, Anh T.; Curtiss, Larry A.; Salehi-Khojin, Amin. The article conveys some information:

Redox mediators (RMs) are solution-based additives that have been extensively used to reduce the charge potential and increase the energy efficiency of Li-oxygen (Li-O2) batteries. However, in the presence of RMs, achieving a long cycle-life operation of Li-O2 batteries at a high current rate is still a major challenge. In this study, we discover a novel synergy among InX3 (X = I and Br) bifunctional RMs, molybdenum disulfide (MoS2) nanoflakes as the air electrode, DMSO/ionic liquid hybrid electrolyte, and LiTFSI as a salt to achieve long cycle-life operations of Li-O2 batteries in a dry air environment at high charge-discharge rates. Our results indicate that batteries with InI3 operate up to 450 cycles with a c.d. of 0.5 A g-1 and 217 cycles with a c.d. of 1 A g-1 at a fixed capacity of 1 A h g-1. Batteries with InBr3 operate up to 600 cycles with a c.d. of 1 A g-1. These batteries can also operate at a higher charge rate of 2 A g-1 up to 200 cycles (for InBr3) and 160 cycles (for InI3). Our exptl. and computational results reveal that while X3- is the source of the redox mediator, LiX at the MoS2 cathode, In3+ reacts on the lithium anode side to form a protective layer on the surface, thus acting as an effective bifunctional RM in a dry air environment. This evidence for a simultaneous improvement in the current rates and cycle life of a battery in a dry air atm. opens a new direction for research for advanced energy storage systems. The results came from multiple reactions, including the reaction of Indium(III) bromide(cas: 13465-09-3HPLC of Formula: 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.HPLC of Formula: 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Low Dielectric Polymers with High Thermostability Derived from Biobased Vanillin》 was published in ACS Sustainable Chemistry & Engineering in 2020. These research results belong to Dai, Menglu; Tao, Yangqing; Fang, Linxuan; Wang, Caiyun; Sun, Jing; Fang, Qiang. Application of 1779-49-3 The article mentions the following:

Vanillin has recently been prepared on a large scale from lignin, which becomes the second largest renewable resource. Because it has a naturally aromatic ring and an easily modified functional group, vanillin is considered as one of the ideal feedstocks for the synthesis of high-performance polymers. Based on this, there are a few investigations on low dielec. polymers derived from vanillin, and we have designed and synthesized a monomer containing crosslinkable vinyl and benzocyclobutene units starting from vanillin. This monomer can be easily thermally polymerized into a crosslinked network, which displays good thermostability with a 5% weight loss temperature (T5d) of up to 436°C and a coefficient of thermal expansion (CTE) of 60.9 ppm/°C. Moreover, no obvious glass-transition temperature (Tg) of the crosslinked network is observed from room temperature to 400°C during the dynamic mech. anal. (DMA). In addition, the DMA test indicates that the crosslinked network exhibits good mech. properties with a storage modulus of up to 3.89 GPa at room temperature Furthermore, the crosslinked network displays good dielec. properties with a dielec. constant (Dk) of less than 2.84 and a dissipation factor (Df) of below 4.9 × 10-3 for frequencies ranging from 0.15 to 20 MHz. At a high frequency of 5 GHz, the crosslinked network exhibits a Dk of 2.81 and a Df of 6.79 × 10-3, resp. When the crosslinked polymer is immersed in water at room temperature for 96 h, it shows a low water uptake of 0.44%. These results indicate that the new biobased thermosetting resin has potential applications as a matrix resin or an encapsulation material in the microelectronic industry. Heating a new functional monomer (BCB-V) derived from vanillin gave a crosslinked network, displaying good hydrophobicity, film uniformity, thermostability, and dielec. properties at a high frequency of 5 GHz. In the experiment, the researchers used Methyltriphenylphosphonium bromide(cas: 1779-49-3Application of 1779-49-3)

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.Application of 1779-49-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary