Tag: 200-300

Recommanded Product: Bis[(pinacolato)boryl]methaneIn 2017 ,《Base-promoted, deborylative secondary alkylation of N-heteroaromatic N-oxides with internal gem-bis[(pinacolato)boryl]alkanes: a facile derivatization of 2,2′-bipyridyl analogues》 appeared in Chemical Communications (Cambridge, United Kingdom). The author of the article were Hwang, Chiwon; Jo, Woohyun; Cho, Seung Hwan. The article conveys some information:

A base-promoted, secondary alkylation of N-heteroaromatic N-oxides, e.g., I using internal gem-bis[(pinacolato)boryl]alkanes R1R2C(Bpin)2 [R1 = H, CH3, (CH2)5CH3; R2 = CH3, CH2C6H5, CH2HC=CH2, etc.] as alkylation reagents is reported. The reaction exhibits a broad scope, providing deoxygenated secondary alkylated N-heteroaromatic compounds, e.g., II with high efficiency. The usefulness of the developed protocol is evidenced by the sequential direct alkylation of 2,2′-bipyridine-N-oxide. In the experimental materials used by the author, we found Bis[(pinacolato)boryl]methane(cas: 78782-17-9Recommanded Product: Bis[(pinacolato)boryl]methane)

Bis[(pinacolato)boryl]methane(cas: 78782-17-9) belongs to organoboron compounds. Organoboron compounds have been a cornerstone of synthetic transformations for decades. Areas such as boron-containing catalysts, metalate chemistry, photoredox methods, and boryl anions have brought significant new developments in understanding and provided new reactivity upon.Recommanded Product: Bis[(pinacolato)boryl]methane

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Wei, Yupeng; Zhu, Junzhi; Xie, Yan; Zhao, Feiyun; Jiang, Jianzhuang; Jiang, Tiantian; Li, Linqi; Hu, Yang; Zhang, Junwei; Peng, Yong published their research in Journal of Materials Science: Materials in Electronics in 2021. The article was titled 《Achieving C/CuO microfiber composites with efficient microwave absorbing performance at low thickness》.Electric Literature of C4H12KNaO10 The article contains the following contents:

The carbon fibers with low d. still face significant microwave absorbing application issues due to their high dielec. constant Herein, C/Cu core-shell microfiber composites are prepared by electroless plating. The Cu coating of C/Cu core-shell microfiber composites is oxidized to CuO at 300°C and 400°C temperature The morphol., microstructure, and electromagnetic characteristics of C/CuO microfiber composites were analyzed. The diameter of all the fiber composites was about 7-8μm. The CuO coating thickness formed at 300°C and 400°C temperature is 30-90 nm and 300-900 nm, resp. The annealing process tunes the electromagnetic characteristics and optimizes impedance matching. The min. reflection loss (RL) value of C/CuO core-shell microfiber composites annealed at 300°C temperature remarkably reaches – 46.0 dB at 1.06 mm thickness and 3.6 GHz effective absorption bandwidth (RL ≤ – 10 dB). The C/CuO microfiber composites can be the ideal absorbing materials at a lower thickness. The results came from multiple reactions, including the reaction of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Electric Literature of C4H12KNaO10)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Electric Literature of C4H12KNaO10 It is utilized to break up emulsion in organic synthesis as well as a common precipitant in protein crystallography.

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Mao, Chenyue; Zhao, Song; He, Pengpeng; Wang, Zhi; Wang, Jixiao published an article in 2021. The article was titled 《Covalent organic framework membranes with limited channels filling through in-situ grown polyaniline for efficient dye nanofiltration》, and you may find the article in Chemical Engineering Journal (Amsterdam, Netherlands).Product Details of 34374-88-4 The information in the text is summarized as follows:

Due to the high porosity and ordered channels, covalent organic framework (COF) membranes with ultrathin selective layer and high permeance have gained increasing attention in the field of nanofiltration (NF). However, it remains a challenge to fabricate ultrathin and dense COF NF membranes with both high permeance and high rejection. This work presents a facile and efficient method to fabricate COF membrane with limited channel filling through in-situ growth of polyaniline (PANI) layer. Specifically, interfacial polymerized COF-TpPa membrane was fabricated with ∼ 1.8 nm pore channel, and then the in-situ grown PANI layer could fill the partial of channels and reduce the effective pore size of COF-TpPa. The obtained PANI-TpPa composite membrane exhibited excellent performance with pure water permeance up to 85.2 L·m-2·h-1·bar-1, congo red rejection above 99.4%, and acid fuchsin rejection above 81.0%. The whole membrane fabrication just cost 3 h and took place at room temperature, which was much more efficient than other membranes with similar performance. Besides, the PANI-TpPa composite membrane showed excellent stability in acidic environment and organic solvent, and maintained great performance in long-term test.2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Product Details of 34374-88-4) was used in this study.

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Phloroglucinol derivatives are a major class of secondary metabolites. Phloroglucinol compounds can be classified into monomeric, dimeric, trimeric and higher phloroglucinols, and phlorotannins.Product Details of 34374-88-4

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Salvado, Oriol; Fernandez, Elena published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《A modular olefination reaction between aldehydes and diborylsilylmethide lithium salts》.Formula: C13H26B2O4 The article contains the following contents:

We describe the preparation of densely functionalized 1,1-silylborylated trisubstituted alkenes, via a boron-Wittig reaction, between LiC(Bpin)2(SiMe3) and aliphatic or aromatic aldehydes. Reaction of aldehydes RCHO (R = aryl, alkyl) with (pinB)2CHSiMe3, promoted by LiTMP, afforded trisubstituted alkenes Me3Si(pinB)C:CHR with 67:33 to 97:3 E/Z stereoselectivity. The condensation of diborylsilylmethide lithium salts with α,β-unsaturated aldehydes provides a direct pathway to synthesize 1,1-silylborylated conjugated dienes and diynes. In the part of experimental materials, we found many familiar compounds, such as Bis[(pinacolato)boryl]methane(cas: 78782-17-9Formula: C13H26B2O4)

Bis[(pinacolato)boryl]methane(cas: 78782-17-9) belongs to organoboron compounds.Formula: C13H26B2O4 Organoboron compounds are versatile intermediates and as such are some of the most important classes of reagents in modern organic chemistry. This stems from their ease of preparation combined with their ability to undergo a broad range of chemical transformations.

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《Iron-catalysed enantioconvergent Suzuki-Miyaura cross-coupling to afford enantioenriched 1,1-diarylalkanes》 was published in Chemical Communications (Cambridge, United Kingdom) in 2020. These research results belong to Tyrol, Chet C.; Yone, Nang S.; Gallin, Connor F.; Byers, Jeffery A.. Formula: C12H17BO2 The article mentions the following:

The first stereoconvergent Suzuki-Miyaura cross-coupling reaction was developed to afford enantioenriched 1,1-diarylalkanes I [R = Me, Et, i-Pr, etc.; R1 = Ph, 4-FC6H4, 1-naphthyl, etc.; R2 = Ph, 4-MeC6H4, 2-naphthyl, etc.]. An iron-based complex containing a chiral cyanobis(oxazoline) ligand framework was best to obtain enantioenriched 1,1-diarylalkanes from cross-coupling reactions between unactivated aryl boronic esters and benzylic chlorides. Enhanced yields were obtained when 1,3,5-trimethoxybenzene was used as an additive, which was hypothesized to extend the lifetime of the iron-based catalyst. Exceptional enantioselectivities were obtained with challenging ortho-substituted benzylic chlorides.4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6Formula: C12H17BO2) was used in this study.

4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6) can be used to prepare sulfinamide derivatives by reacting with diethylaminosulfur trifluoride (DAST) and potassium phenyltrifluoroborate.Formula: C12H17BO2

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Application In Synthesis of 2-(3,4-Dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneOn March 19, 2014, Obligacion, Jennifer V.; Semproni, Scott P.; Chirik, Paul J. published an article in Journal of the American Chemical Society. The article was 《Cobalt-Catalyzed C-H Borylation》. The article mentions the following:

A family of pincer-ligated cobalt complexes has been synthesized and are active for the catalytic C-H borylation of heterocycles and arenes. The cobalt catalysts operate with high activity and under mild conditions and do not require excess borane reagents. Up to 5000 turnovers for Me furan-2-carboxylate have been observed at ambient temperature with 0.02 mol % catalyst loadings. A catalytic cycle that relies on a cobalt(I)-(III) redox couple is proposed. The results came from multiple reactions, including the reaction of 2-(3,4-Dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 401797-00-0Application In Synthesis of 2-(3,4-Dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane)

2-(3,4-Dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 401797-00-0) belongs to hydroxy-containing compounds. Hydroxy-containing compounds engage in intermolecular hydrogen bonding increasing the electrostatic attraction between molecules and thus to higher boiling and melting points than found for compounds that lack this functional group.Application In Synthesis of 2-(3,4-Dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Organic compounds, which are often poorly soluble in water, become water-soluble when they contain two or more hydroxy groups, as illustrated by sugars and amino acid.

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SDS of cas: 1082066-29-2On October 2, 2019 ,《Para-Selective, Iridium-Catalyzed C-H Borylations of Sulfated Phenols, Benzyl Alcohols, and Anilines Directed by Ion-Pair Electrostatic Interactions》 was published in Journal of the American Chemical Society. The article was written by Montero Bastidas, Jose R.; Oleskey, Thomas J.; Miller, Susanne L.; Smith, Milton R.; Maleczka, Robert E.. The article contains the following contents:

Para C-H borylations (CHB) of tetraalkylammonium sulfates [R4N][ArOSO3] (R = n-Pr, Bu) and sulfamates [Bu4N][ArNHSO3] have been achieved using bipyridine-ligated Ir boryl catalysts, 4,4′-R2bpy/[Ir(cod)(OMe)]2/B2pin2, yielding borylated phenols 4-(pinB)-RC6H3OH (R = halo, Me, CN, CF3, CF3O, OMe), together with minor amounts of meta-isomers. Selectivities can be modulated by both the length of the alkyl groups in the tetraalkylammonium cations and the substituents on the bipyridine ligands. Ion pairing, where the alkyl groups of the cation shield the meta C-H bonds in the counteranions, is proposed to account for para selectivity. The 4,4′-dimethoxy-2,2′-bipyridine ligand gave superior selectivities. In the experiment, the researchers used many compounds, for example, (2-Fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanol(cas: 1082066-29-2SDS of cas: 1082066-29-2)

(2-Fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanol(cas: 1082066-29-2) belongs to organoboron compounds. Organoboron compounds are versatile intermediates and as such are some of the most important classes of reagents in modern organic chemistry. Organoboron compounds are less toxic than organostannane reagents, and unlike alkynylzinc and magnesium, many organoboron compounds possess remarkable oxidative and thermal stabilities. SDS of cas: 1082066-29-2

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《Spontaneous Evolution of the Domain Structure and Dielectric Relaxation in Crystals of Triglycine Sulfate and Rochelle Salt》 was written by Golitsyna, O. M.; Drozhdin, S. N.. Application of 6381-59-5This research focused ontriglycine sulfate rochelle salt dielec relaxation permittivity annealing. The article conveys some information:

Short-term annealing in the paraelec. phase causes an exponential drop in the dielec. permittivity in the ferroelec. phase of triglycine sulfate (TGS) crystals and Rochelle salt crystals. This is due to the spontaneous enlargement of the nonequilibrium domain structure of these crystals. Introducing radiation or impurity defects into a TGS crystal accelerates the processes of dielec. relaxation with their localization near TC only. The results came from multiple reactions, including the reaction of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Application of 6381-59-5)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Application of 6381-59-5 Potassium sodium tartrate tetrahydrate has been used in the preparation of Lowry reagent for the determination of microsomal protein concentration in rat hepatic microsomes by Lowry method.

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In 2018,Mahmud, Asif; Mahmud, Shadman Sharar; Moniruzzaman, Md. published 《Electroless deposition of p-type cuprous oxide thin film for solar application》.IOP Conference Series: Materials Science and Engineering published the findings.Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate The information in the text is summarized as follows:

Solar cells hold a promising prospect in the foreseeable future. Presently cuprous oxides (Cu2O), due to their excellent photovoltaic properties, are being considered as p-type semiconductor materials for solar cell. This work aims at electroless deposition of p-type Cu2O thin film on copper substrate and studying its various properties through characterizations. A bath containing varying amounts of CuCl2.2H20, CoCl2.6H20, NaH2PO2.6H20 and KNaTar.4H2O (Potassium sodium tartrate tetrahydrate) was used for the process. NaOH pellets were used in order to get the desired pH level ranging from 11 to 14. The bath temperature was varied between 30°C to 70°C. The deposited films were characterized by Scanning Electron Microscope (SEM) equipped with Energy Dispersive Spectroscopy (EDS), X-ray diffractometer (XRD) and UV spectroscopy. It was observed that thin films were deposited at different conditions and uniform deposition of Cu2O thin film was visible at pH 14. The coating thickness was found to be in the range of 0.48 to 4.6μm. The bandgap for the deposited Cu2O was found to be in the range of 1.3-1.4 eV. Some variation in results at different pH were observed and the reasons were identified. In the experiment, the researchers used Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate It is utilized to break up emulsion in organic synthesis as well as a common precipitant in protein crystallography.

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《Investigation on Physical Properties of Sn-Modified Cubic Cu2O Nanostructures》 was written by Budhiraja, Narender; Sapna; Kumar, Vinod; Tomar, Monika; Gupta, Vinay; Singh, S. K.. COA of Formula: C4H12KNaO10This research focused ontin copper oxide nanostructure phys property. The article conveys some information:

Cubic Cu2-x SnxO (0 ≤x ≤0.4) nanostructures have been developed with the solvothermal method. X-ray diffraction data anal. confirms the formation of a pristine Cu2O phase below x = 0.3 Sn2+ substitution, and SnO-related phases appear in 0.3 substitute sample indicating phase segregation starts at x≥0.3. The magnetization vs. applied field (M – H) curves have been determined using a vibrating sample magnetometer at 300 K which reveals that ferromagnetic behavior of synthesized nanomaterials is reliant on the substituent concentration and enhanced gradually with its addition in the material. Photoluminescence spectra show that ferromagnetism originates from the induced magnetic moment in defects created as cation vacancies in the host material. Beside these, the dielec. measurements were performed at various frequencies (20 Hz-1 MHz) and in the temperature range of 100 to 350 K. In addition to this study using Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate, there are many other studies that have used Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5COA of Formula: C4H12KNaO10) was used in this study.

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. COA of Formula: C4H12KNaO10 It may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.

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