Tag: 300-400

《Biocidal polymers: synthesis, characterization and antimicrobial activity of bis-quaternary onium salts of poly(aspartate-co-succinimide)》 was written by El-Newehy, Mohamed H.; Meera, Moydeen A.; Aldalbahi, Ali K.; Thamer, Badr M.; Mahmoud, Yehia A.-G.; El-Hamshary, Hany. Quality Control of Methyltriphenylphosphonium bromideThis research focused onwater soluble biocidal polymer antimicrobial activity thermal stability; antimicrobial activity; poly(aspartate-co-succinimide); quaternary salts; water-soluble polymers. The article conveys some information:

Microbial multidrug resistance presents a real problem to human health. Therefore, water-soluble polymers based on poly(aspartate-co-succinimide) were synthesized via reaction of poly(aspartate-co-succinimide) with bis-quaternary ammonium or quaternary salts. The resultant copolymers were characterized by various techniques such as FTIR, TGA, 1HNMR, 13CNMR and elemental microanal. Antimicrobial activities of the new onium salts were investigated against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Salmonella typhi, and the fungi; Candida albicans, Aspergillus niger, Cryptococcus neoformans and Aspergillus flavus by agar diffusion method. Antimicrobial activity was studied in terms of inhibition zone diameters, in addition to the estimation of minimal inhibitory concentration (MIC) of the prepared compounds A. niger and E. coli were the most affected microorganisms among the tested microorganisms with an inhibition zone of 19-21 (mm) in case of biocides, (V) and (VII). The obtained results showed that the quaternary onium salts have higher activity compared to the aspartate copolymer with MIC concentrations of 25 mg/mL for (VII) and (V) and 50 mg/mL for (VI) and (IV). The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Quality Control 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.Quality Control of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Application In Synthesis of Ethyltriphenylphosphonium bromideIn 2020 ,《Influence of Small Molecular Property on Antibody Response》 was published in Journal of Agricultural and Food Chemistry. The article was written by Wen, Kai; Bai, Yuchen; Wei, Yujie; Li, Chenglong; Shen, Jianzhong; Wang, Zhanhui. The article contains the following contents:

Antibodies with high titer and affinity to small mols. are critical in the field of vaccines against drugs of abuse, antidotes to toxins, and immunoassays for compounds However, little is known regarding how properties of small mols. have influence and which mol. descriptors could indicate the degree of the antibody response. On the basis of our previous study, we designed and synthesized two groups of hapten mols. with varied hydrophobicity to investigate the relationship between the properties of the small mols. and the antibody response in terms of titer and affinity. We found that the magnitude of the antibody response was pos. correlated with the degree of mol. hydrophobicity and related descriptors. This study provides insight into the immunol. characteristics of small mols. themselves and useful clues to produce high-quality antibodies against small mols. After reading the article, we found that the author 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

Application In Synthesis of 3,6-Dibromo-9H-carbazoleIn 2019 ,《Analysis of polyhalogenated carbazoles in sediment using liquid chromatography-tandem mass spectrometry》 was published in Ecotoxicology and Environmental Safety. The article was written by Zhou, Wenxiu; Huang, Xinwen; Lin, Kunde. The article contains the following contents:

The purpose of this study was to develop a novel and sensitive method for the anal. of carbazole and polyhalogenated carbazoles (PHCs) in sediment using ultra performance liquid chromatog.-tandem mass spectrometry (UPLC-MS/MS). Briefly, 5.0 g of freeze-dried sediment samples were extracted with dichloromethane using pressurized liquid extraction (PLE). The extract was purified with Florisil solid phase extraction cartridge, filtered through 0.22μm polytetrafluoroethylene filter using a glass syringe, followed by LC-MS/MS anal. Besides parameters for LC-MS/MS anal., sample preparation procedures (including solvents for PLE, sorbents for cleanup, and filters for sample filtration) were optimized. The limits of detection and limits of quantification of target compounds were in the ranges of 3.0 × 10-3 to 0.22 ng g-1 dry weight (d.w.) and 1.0 × 10-2 to 0.75 ng g-1 d.w., resp. The recoveries of target compounds in the spiked sediments at 2.0 ng g-1 d.w. and 10 ng g-1 d.w. were 64.8-91.8% and 70.9-124.7%, resp., with relative standard deviations being less than 13.2%. Except that 36-BCZ had pos. matrix effects of 63.3%, the sediment matrixes generally displayed low or medium neg. matrix effects on the other target compounds during LC-MS/MS anal. The developed method was applied in the anal. of carbazoles and PHCs in sediment samples from Jiulong River, Fujian, China and all the target compounds were detected in the samples. 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 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.Application In Synthesis of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

HPLC of Formula: 6825-20-3In 2021 ,《Rigid Polyimides with Thermally Activated Delayed Fluorescence for Polymer Light-Emitting Diodes with High External Quantum Efficiency up to 21%》 was published in Angewandte Chemie, International Edition. The article was written by Long, Yubo; Chen, Xiaojie; Wu, Huiyan; Zhou, Zhuxin; Sriram Babu, Seenivasagaperumal; Wu, Minming; Zhao, Juan; Aldred, Matthew P.; Liu, Siwei; Chen, Xudong; Chi, Zhenguo; Xu, Jiarui; Zhang, Yi. The article contains the following contents:

Rigid nonconjugated polyimide (PI)-based thermally activated delayed fluorescence (TADF) polymers were reported, based on a TADF-linker-host strategy. Among of which, the TADF unit contains a typical TADF luminous core structure, the Host unit exhibits effective conjugation length that endows polyimide with high triplet energy, and the Linker unit has an aliphatic ring structure to improve solubility and inhibits intramol. charge transfer effect. All the TADF polymers exhibit high thermal stability (Tg > 308.7°) and refractive index (1.76-1.79). Highly-efficient polymer light-emitting diodes (PLEDs) based on the polymers are successfully realized, leading to a maximal external quantum efficiency of 21.0% along with low efficiency roll-off. Such outstanding efficiency is amongst the state-of-the-art performance of nonconjugated PLEDs, confirming the effectiveness of structural design strategy, providing helpful and valuable guidance on the development of highly-efficient fluorescent polymer materials and PLEDs. The results came from multiple reactions, including the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3HPLC of Formula: 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.HPLC of Formula: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 523-27-3In 2020 ,《Quantitative Supramolecular Heterodimerization for Efficient Energy Transfer》 appeared in Angewandte Chemie, International Edition. The author of the article were Wu, Guanglu; Huang, Zehuan; Scherman, Oren A.. The article conveys some information:

The challenge of quant. forming self-assembled heterodimers without other equilibrium byproducts is overcome through self-sorting favored by the introduction of designed shape-complementary moieties. Such a supramol. strategy based on cucurbit[8]uril-directed dimerization is further applied to generate hetero-chromophore dimers quant., leading to efficient energy transfer (>85%) upon photoexcitation. The experimental process involved the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Recommanded Product: 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.Recommanded Product: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Scale-Up of Room-Temperature Constructive Quantum Interference from Single Molecules to Self-Assembled Molecular-Electronic Films》 was published in Journal of the American Chemical Society in 2020. These research results belong to Wang, Xintai; Bennett, Troy L. R.; Ismael, Ali; Wilkinson, Luke A.; Hamill, Joseph; White, Andrew J. P.; Grace, Iain M.; Kolosov, Oleg V.; Albrecht, Tim; Robinson, Benjamin J.; Long, Nicholas J.; Cohen, Lesley F.; Lambert, Colin J.. HPLC of Formula: 523-27-3 The article mentions the following:

The realization of self-assembled mol.-electronic films, whose room-temperature transport properties are controlled by quantum interference (QI), is an essential step in the scale-up of QI effects from single mols. to parallel arrays of mols. Recently, the effect of destructive QI (DQI) on the elec. conductance of self-assembled monolayers (SAMs) has been investigated. Here, through a combined exptl. and theor. investigation, we demonstrate chem. control of different forms of constructive QI (CQI) in cross-plane transport through SAMs and assess its influence on cross-plane thermoelectricity in SAMs. It is known that the elec. conductance of single mols. can be controlled in a deterministic manner, by chem. varying their connectivity to external electrodes. Here, by employing synthetic methodologies to vary the connectivity of terminal anchor groups around aromatic anthracene cores, and by forming SAMs of the resulting mols., we clearly demonstrate that this signature of CQI can be translated into SAM-on-gold mol. films. We show that the conductance of vertical mol. junctions formed from anthracene-based mols. with two different connectivities differ by a factor of approx. 16, in agreement with theor. predictions for their conductance ratio based on CQI effects within the core. We also demonstrate that for mols. with thioether anchor groups, the Seebeck coefficient of such films is connectivity dependent and with an appropriate choice of connectivity can be boosted by ~50%. This demonstration of QI and its influence on thermoelectricity in SAMs represents a critical step toward functional ultra-thin-film devices for future thermoelec. and mol.-scale electronics applications. In addition to this study using 9,10-Dibromoanthracene, there are many other studies that have used 9,10-Dibromoanthracene(cas: 523-27-3HPLC of Formula: 523-27-3) was used in this study.

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.HPLC of Formula: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Angewandte Chemie, International Edition included an article by Yi, Xiangli; Hu, Xile. Name: Ethyltriphenylphosphonium bromide. The article was titled 《Formal Aza-Wacker Cyclization by Tandem Electrochemical Oxidation and Copper Catalysis》. The information in the text is summarized as follows:

An approach to transform electrochem. generated organic radical intermediates into neutral products e.g., I by reaction with a metal catalyst was described. This approach combines electrochem. oxidation with Cu catalysis to effect formal aza-Wacker cyclization of internal alkenes e.g., crotyl N-phenylcarbamate. The Cu catalyst is essential for transforming secondary and primary alkyl radical intermediates into alkenes. A wide range of 5-membered N-heterocycles can be prepared under mild conditions. In the experiment, the researchers used many compounds, for example, Ethyltriphenylphosphonium bromide(cas: 1530-32-1Name: 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.Name: Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Liu, Xufang; Rong, Xianle; Liu, Shihan; Lan, Yu; Liu, Qiang published an article in 2021. The article was titled 《Cobalt-Catalyzed Desymmetric Isomerization of Exocyclic Olefins》, and you may find the article in Journal of the American Chemical Society.Application of 1530-32-1 The information in the text is summarized as follows:

Chiral cyclic olefins, 1-methylcyclohexenes, are versatile building blocks for the synthesis of pharmaceuticals and natural products. Despite the prevalence of these structural motifs, the development of efficient synthetic methods remains an unmet challenge. Herein the authors report a novel desym. isomerization of exocyclic olefins using a series of newly designed chiral cobalt catalysts, which enables a straightforward construction of chiral 1-methylcyclohexenes with diversified functionalities. The synthetic utility of this methodol. is highlighted by a concise and enantioselective synthesis of a natural product, β-bisabolene. The versatility of the reaction products is further demonstrated by multifarious derivatization. In addition to this study using Ethyltriphenylphosphonium bromide, there are many other studies that have used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application of 1530-32-1) was used in this study.

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 of 1530-32-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kumar, Nikhil; Banerjee, Tamal published their research in Journal of Chemical & Engineering Data in 2021. The article was titled 《Dearomatization Insights with Phosphonium-Based Deep Eutectic Solvent: Liquid-Liquid Equilibria Experiments and Predictions》.Computed Properties of C19H18BrP The article contains the following contents:

In a challenge to develop a process that meets the criteria of being “”green”” in the extraction of aromatics, deep eutectic solvents (DESs) are currently gaining importance as separation media. This work reports a phosphonium-based DES for the dearomatization of model diesel components at 25°C and p = 1 bar. The DES comprising a hydrogen bond acceptor, namely, methyltriphenylphosphonium bromide, along with ethylene glycol as a hydrogen bond donor, was formulated with a molar ratio of 1:4. The DES was then used to extract benzene from representative diesel fuel components, a mixture of n-decane, n-dodecane, and n-hexadecane. Ternary liquid-liquid equilibrium experiments were then performed at ambient conditions with different benzene concentrations with the feed varying from 2 to 20 wt %. An absence of the solvent in the raffinate phase was found in all the tie lines, suggesting limited solvent recovery costs. Besides, it was also found that all three ternary systems show type I phase activity with pos. slopes, indicating that the desired removal of benzene requires a small amount of solvent. The quantum chem.-based COSMO-SAC model was then used to predict the tie lines giving an average root mean square deviation value of 1.2%. The mechanism of the extraction process was also extensively studied with the help of quant. 1H NMR and Fourier transform IR spectroscopy. Higher benzene extraction efficiencies were observed due to the strong noncovalent interaction between the DES and benzene. In the experiment, the researchers used many compounds, for example, Methyltriphenylphosphonium bromide(cas: 1779-49-3Computed Properties of 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.Computed Properties of C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Carbazole-Terminated Isomeric Hole-Transporting Materials for Perovskite Solar Cells》 was written by Rakstys, Kasparas; Paek, Sanghyun; Drevilkauskaite, Aida; Kanda, Hiroyuki; Daskeviciute, Sarune; Shibayama, Naoyuki; Daskeviciene, Maryte; Gruodis, Alytis; Kamarauskas, Egidijus; Jankauskas, Vygintas; Getautis, Vytautas; Nazeeruddin, Mohammad Khaja. Computed Properties of C12H7Br2N And the article was included in ACS Applied Materials & Interfaces in 2020. The article conveys some information:

A set of novel hole-transporting materials (HTMs) based on π-extension through carbazole units was designed and synthesized via a facile synthetic procedure. The impact of isomeric structural linking on their optical, thermal, electrophys., and photovoltaic properties was thoroughly investigated by combining the exptl. and simulation methods. Ionization energies of HTMs were measured and found to be suitable for a triple-cation perovskite active layer ensuring efficient hole injection. New materials were successfully applied in perovskite solar cells, which yielded a promising efficiency of up to almost 18% under standard 100 mW cm-2 global AM1.5G illumination and showed a better stability tendency outperforming that of 2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene. This work provides guidance for the mol. design strategy of effective hole-conducting materials for perovskite photovoltaics and similar electronic devices. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Computed Properties 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 as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Computed Properties of C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary