Month: October 2022

In 2022,Zhu, Hong; Pan, Yuexiao; Peng, Chengdong; Lian, Hongzhou; Lin, Jun published an article in Angewandte Chemie, International Edition. The title of the article was 《4-Bromo-Butyric Acid-Assisted In Situ Passivation Strategy for Superstable All-Inorganic Halide Perovskite CsPbX3 Quantum Dots in Polar Media》.Application of 2623-87-2 The author mentioned the following in the article:

A crucial challenge is to develop an in situ passivation treatment strategy for CsPbX3 (CPX, X=Cl, Br, and I) quantum dots (QDs) and simultaneously retain their luminous efficiency and wavelength. Here, a facile method to significantly improve the stability of the CPX QDs via in situ crystallization with the synergistic effect of 4-bromo-butyric acid (BBA) and oleylamine (OLA) in polar solvents including aqueous solution and a possible fundamental mechanism are proposed. Monodispersed CsPbBr3 (CPB) QDs obtained in water show high photoluminescence quantum yields (PLQYs) of 86.4% and their PL features of CPB QDs have no significant change after being dispersed in aqueous solution for 96 h, which implies the structure of CPB QDs is unchanged. The results provide a viable design strategy to synthesize all-inorganic perovskite CPX QDs with strong stability against the attack of polar solvents and shed more light on their surface chem.4-Bromobutanoic acid(cas: 2623-87-2Application of 2623-87-2) was used in this study.

4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Application of 2623-87-2

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

In 2022,Yuan, Wei; Zhu, Xujiang; Xu, Yankun; He, Chuan published an article in Angewandte Chemie, International Edition. The title of the article was 《Synthesis of Si-Stereogenic Silanols by Catalytic Asymmetric Hydrolytic Oxidation》.Recommanded Product: 1-Bromo-2-isopropylbenzene The author mentioned the following in the article:

Despite growing progress in the construction of chiral organosilicon compounds, the catalytic asym. synthesis of silicon-stereogenic silanols is less explored and remains a considerable challenge. Herein, authors report the first enantioselective construction of silicon-stereogenic silanols by the catalytic asym. hydrolytic oxidation of dihydrosilanes. This practical procedure features ambient reaction conditions, high atom economy, good functional-group compatibility, and H2 as the only byproduct, and produces a wide range of valuable chiral silanols and bis-silanols in decent yields with excellent chemo- and stereoselectivity.1-Bromo-2-isopropylbenzene(cas: 7073-94-1Recommanded Product: 1-Bromo-2-isopropylbenzene) was used in this study.

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. In contrast, terrestrial plants account only for a few bromine-containing compounds.Recommanded Product: 1-Bromo-2-isopropylbenzene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhang, Yuhang; Li, Rui; Chang, Lijing; Ma, Yang; Hou, Yanjun; Niu, Haijun published an article in Macromolecular Chemistry and Physics. The title of the article was 《Electropolymerization of thiophene-based monomers with different spatial structures: the impact of monomer structure on electrochromic properties》.HPLC of Formula: 3141-27-3 The author mentioned the following in the article:

The development prospect of conductive electrochromic (EC) polymers requires the design of polymers with high performance and good stability. Here, a new scheme is designed to enhance EC properties by adjusting the monomer mol. structure. Four monomers with different structures based on thiophene and 3,4-ethylenedioxythiophene (EDOT) are designed and synthesized. The corresponding polymer films (P1, P2, P3, and P4) are prepared by electrochem. polymerization at low applied potential. The spatial structure-performance relationship of precursors with different structures and polymers is systematically discussed. In the electropolymerization experiments, it is noted that P3 has no EC property. This may be connected to the spatial structure of P3 polymerization which is not suitable for charge transporting. By contrast, the other three polymers exhibit excellent electrochem. properties. The diffusion rate higher of P1 has also been corroborated by using electrochem. impedance spectroscopy (EIS) spectrum. The P1 film has the best stability and fastest colorized time among the samples; such superior electrochem. property may be associated with the closely stacked formed by the unique sheet-like spatial structure. The design of the space structure has a significant impact on the optical and elec. properties of the polymer film. In the experiment, the researchers used many compounds, for example, 2,5-Dibromothiophene(cas: 3141-27-3HPLC of Formula: 3141-27-3)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used as starting reagent for the synthesis of α,α′-didecylquater-, -quinque- and -sexi-thiophenes.HPLC of Formula: 3141-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhao, Zean; Liu, Jin; Kuang, Peihua; Luo, Jian; Surineni, Goverdhan; Cen, Xiaolin; Wu, Ting; Cao, Ying; Zhou, Pingzheng; Pang, Jianxin; Zhang, Qun; Chen, Jianjun published an article in European Journal of Medicinal Chemistry. The title of the article was 《Discovery of novel verinurad analogs as dual inhibitors of URAT1 and GLUT9 with improved Druggability for the treatment of hyperuricemia》.SDS of cas: 1129-28-8 The author mentioned the following in the article:

Verinurad (RDEA3170) is a selective URAT1 inhibitor under investigation for the treatment of gout and hyperuricemia. In an effort to further improve the pharmacodynamics/pharmacokinetics of verinurad and to increase the structural diversity, we designed novel verinurad analogs by introducing a linker (e.g. aminomethyl, amino or oxygen) between the naphthalene and the pyridine ring to increase the flexibility. These compounds were synthesized and tested for their in vitro URAT1-inhibitory activity. Most compounds exhibited potent inhibitory activities against URAT1 with IC50 values ranging from 0.24 μM to 16.35 μM. Among them, compound KPH2f exhibited the highest URAT1-inhibitory activity with IC50 of 0.24 μM, comparable to that of verinurad (IC50 = 0.17 μM). KPH2f also inhibited GLUT9 with an IC50 value of 9.37 ± 7.10 μM, indicating the dual URAT1/GLUT9 targeting capability. In addition, KPH2f showed little effects on OAT1 and ABCG2, and thus was unlikely to cause OAT1/ABCG2-mediated drug-drug interactions and/or to neutralize the uricosuric effects of URAT1/GLUT9 inhibitors. Importantly, KPH2f (10 mg/kg) was equally effective in reducing serum uric acid levels and exhibited higher uricosuric effects in a mice hyperuricemia model, as compared to verinurad (10 mg/kg). Furthermore, KPH2f demonstrated favorable pharmacokinetic properties with an oral bioavailability of 30.13%, clearly better than that of verinurad (21.47%). Moreover, KPH2f presented benign safety profiles without causing hERG toxicity, cytotoxicity in vitro (lower than verinurad), and renal damage in vivo. Collectively, these results suggest that KPH2f represents a novel, safe and effective dual URAT1/GLUT9 inhibitor with improved druggabilities and is worthy of further investigation as an anti-hyperuricemic drug candidate. The results came from multiple reactions, including the reaction of Methyl 3-(bromomethyl)benzoate(cas: 1129-28-8SDS of cas: 1129-28-8)

Methyl 3-(bromomethyl)benzoate(cas: 1129-28-8) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. SDS of cas: 1129-28-8 Moreover, several studies demonstrate that the average proportion of bromine in drugs is significantly higher than that in natural products.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

SDS of cas: 5437-45-6In 2020 ,《Facile synthesis of indolizines using layered double hydroxides@poly(p-phenylenediamine) as a catalyst with a green tool (neat technology)》 appeared in Applied Organometallic Chemistry. The author of the article were Karamshahi, Zahra; Ghorbani-Vaghei, Ramin. The article conveys some information:

The three-component reaction of phenacyl bromide, di-Me acetylenedicarboxylate and pyridine was catalyzed by layered double hydroxides@poly(p-phenylenediamine) (LDHs@PpPDA), in a one-pot reaction, in order to give the corresponding indolizines in excellent yields. After reading the article, we found that the author used Benzyl 2-bromoacetate(cas: 5437-45-6SDS of cas: 5437-45-6)

Benzyl 2-bromoacetate(cas: 5437-45-6) has been used in the alkylation of (-)-2,3-O-isopropylidene-D-threitol that afforded lipopeptide, 2-[(4R,5R)-5-({[(9H-fluoren-9-yl)methoxy]carbonylaminomethyl}-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy]acetic acid.SDS of cas: 5437-45-6

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

Quality Control of 3-Bromo-2-methylbenzoic acidIn 2018 ,《Regioselective Functionalization of 4-Methyl-1H-indole for Scalable Synthesis of 2-Cyano-5-formyl-4-methyl-1H-indole》 appeared in Organic Process Research & Development. The author of the article were Zhang, Jun; Hu, Yun; Wang, Haiyu; Guo, Aixin; Kong, Jianshe; Ma, Rujian; Wu, Tao; Wang, Yi; Li, Lian-Sheng; Mai, Wanping; Ren, Pingda; Deng, Xiaohu. The article conveys some information:

We report a five-step synthesis of 2-cyano-5-formyl-4-methyl-1H-indole through sequential functionalization of readily available 4-methyl-1H-indole. Cyano and aldehyde functionalities are regioselectively installed at the 2 and 5 position, resp. The sequence is concise and high-yielding, amenable for kilogram scale production In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzoic acid(cas: 76006-33-2Quality Control of 3-Bromo-2-methylbenzoic acid)

3-Bromo-2-methylbenzoic acid(cas: 76006-33-2) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Quality Control of 3-Bromo-2-methylbenzoic acid Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool.

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

Safety of 1-Bromo-2-isopropylbenzeneIn 2017 ,《Homo- and heteroditopic sulfur-based bidentate ligands towards selective ethylene oligomerization: The critical influence of ligand structure on product profile》 was published in Applied Catalysis, A: General. The article was written by Makume, Boitumelo F.; Maumela, Munaka C.; Holzapfel, Cedric W.; Dixon, John T.. The article contains the following contents:

Homo- and heteroditopic sulfur-based bidentate ligands can be used successfully for ethylene oligomerization. The obtained liquid product distributions agree well with the metallacycle mechanism. Non-selective systems can be shifted towards predominantly 1-hexene and 1-octene formation (>80% 1-hexene and 1-octene combined, with up to 50% 1-octene selectivity in the liquid product) through appropriate ligand structure modifications. In the experimental materials used by the author, we found 1-Bromo-2-isopropylbenzene(cas: 7073-94-1Safety of 1-Bromo-2-isopropylbenzene)

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Safety of 1-Bromo-2-isopropylbenzene Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary