Tag: 200-300

《Zero field splitting parameters of Cr3+ doped potassium sodium dl-tartrate tetrahydrate》 was written by Kripal, Ram; Yadav, Awadhesh Kumar. Reference of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrateThis research focused onzero field splitting parameter chromium doped potassium sodium dl. The article conveys some information:

The zero field splitting parameters (ZFSPs) D and E of Cr3+ ion doped potassium sodium dl-tartrate tetrahydrate (PSTT), KNaC4H4O6·4H2O are calculated using the superposition model. The theor. calculated ZFSPs for Cr3+ in PSTT crystal are compared with the exptl. values obtained by ESR. Theor. ZFSPs are in good agreement with the exptl. values. The energy band positions of optical absorption spectra of Cr3+ in PSTT single crystal calculated with the CFA package agree well with exptl. values. The experimental part of the paper was very detailed, including the reaction process of 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 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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Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrateIn 2015 ,《Facile synthesis of fine Zn2SnO4 nanoparticles/graphene composites with superior lithium storage performance》 was published in Journal of Power Sources. The article was written by Wang, Bang-Yong; Wang, Hui-Yuan; Ma, Yin-Long; Zhao, Xiao-Hui; Qi, Wen; Jiang, Qi-Chuan. The article contains the following contents:

Fine Zn2SnO4 nanoparticles are synthesized via a facile hydrothermal route using potassium sodium tartrate as a structure-directing agent for the first time. The average size of the as-prepared nanoparticles is about 8-10 nm. More significantly, based on the effect of the reaction time and the amounts of tartrate on the morphol. evolution of the precursors, a crystal growth mechanism is proposed involving in-situ dissolution-recrystallization accompanied by morphol. and phase change. The Zn2SnO4/graphene (Zn2SnO4/G) nanocomposites are further obtained through the incorporation of graphene sheets under another hydrothermal condition. When evaluated as anode for lithium ion batteries, Zn2SnO4/G nanocomposites deliver a high specific capacity of 745 mAh/g after 100 cycles at 200 mA/g and improved cyclic stability with a capacity of 492 mAh/g after 500 cycles at 500 mA/g. The outstanding electrochem. performance is mainly ascribed to the synergetic effect of fine Zn2SnO4 nanoparticles and graphene nanosheets. Furthermore, our work provides a simple and low-cost synthetic strategy for the controllable fabrication of various structural materials for energy storage. The results came from multiple reactions, including the reaction of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Quality Control 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. Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate As a Biuret reagent, it is used to measure the protein concentration. Furthermore, it is used as laxative and is also used in food industry.

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HPLC of Formula: 6381-59-5In 2013 ,《Kinetics of thermal decomposition of potassium sodium tartrate tetrahydrate》 appeared in Asian Journal of Chemistry. The author of the article were Wang, Xinfang. The article conveys some information:

Kinetic analyses were performed on potassium sodium tartrate tetrahydrate (KNaC4H4O6.4H2O) using TG/DTA measurement in N2. The thermal behavior and the effect of heating rate on the kinetics were investigated. To estimate the activation energy E of decomposition, the Ozawa and Kissinger iso-conversional method were applied. All stages of dehydration are governed by nucleation model F1 [g(α) = (1-α)-1]. The experimental part of the paper was very detailed, including the reaction process of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5HPLC of Formula: 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. HPLC of Formula: 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 2022,Rahali, Seyfeddine; Belhocine, Youghourta; Allal, Hamza; Bouhadiba, Abdelaziz; Assaba, Ibtissem Meriem; Seydou, Mahamadou published an article in Structural Chemistry. The title of the article was 《A DFT investigation of the host-guest interactions between boron-based aromatic systems and β-cyclodextrin》.Formula: C12H17BO2 The author mentioned the following in the article:

D. functional theory calculations including dispersion at BLYP-D3(BJ)/def2-SVP level of theory were performed for a series of systems based on cyclodextrin complexation with boron-based aromatic compounds Elaborated investigations were carried out using different quantum chem. parameters such as computed complexation energies, theor. association constants, and natural bond orbital (NBO) anal. Several configurations and inclusion modes were considered in this work. The calculated complexation energies were consistent with the exptl. classification of these systems on the basis of occurring interactions. Reduced d. gradient (RDG) and independent gradient model (IGM) approaches determined the nature and strength of non-covalent interactions which played a central role in the formation of the complexes. Thus, phenylboronic acid (PBA) and benzoxaborole (Bxb) act mainly as hydrogen-bonded complexes with β-cyclodextrin, while mainly Van der Waals (vdW) interactions stabilize both catechol (PhBcat) and pinacol esters of phenylboronic acid (PhBpin) complexes. The ferroceneboronic acid (FcBA) exhibits a mixture of H-bonds and vdW interactions with β-cyclodextrin. In the part of experimental materials, we found many familiar compounds, such as 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6Formula: C12H17BO2)

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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In 2019,ACS Applied Nano Materials included an article by Cui, Wei-Rong; Zhang, Cheng-Rong; Jiang, Wei; Liang, Ru-Ping; Qiu, Jian-Ding. HPLC of Formula: 34374-88-4. The article was titled 《Covalent Organic Framework Nanosheets for Fluorescence Sensing via Metal Coordination》. The information in the text is summarized as follows:

Covalent organic framework nanosheets (COF NSs) provide well-ordered π-π structures that can be used to develop luminescent materials. However, most COF NSs have problems of weak luminescence and low fluorescence quantum yield. In this work, the authors prepared covalent organic framework nanosheets (Bpy-NSs) with good water dispersibility, nitrogen-rich functional groups, and regular pore structure. The authors explored the coordination of Bpy-NSs with Al3+ to eliminate the fluorescence quenching process caused by photoinduced electron transfer (PET). Thus, the fluorescence “”turn-on”” signal linearly increases with Al3+ concentration, achieving a 15.7-fold improved in fluorescence, and the absolute fluorescence quantum yield increased from 0.15 to 1.74%. Furthermore, this is the first COF fluorescence sensor that can be used for high sensitivity and selectivity detection of Al3+ in the aqueous phase. The authors anticipate that the expansion of metal ions coordination strategy in the aqueous phase will not only significantly enhance the fluorescence of COF NSs but also extend the functional range of COF NSs. The experimental process involved the reaction of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4HPLC of Formula: 34374-88-4)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives.HPLC of Formula: 34374-88-4For acyl phloroglucinols, it is considered the largest category of compounds among phloroglucinols of natural characteristics.

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In 2019,Tetrahedron Letters included an article by Laskar, Khairujjaman; Paul, Subham; Bora, Utpal. Quality Control of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane. The article was titled 《Cellulose as recyclable organocatalyst for ipso-hydroxylation of arylboronic acids》. The information in the text is summarized as follows:

Cellulose catalyzed oxidative hydroxylation of aryl and hetero-arylboronic acids to the corresponding phenols under metal and base free strategy was demonstrated. The sustainable ipso-hydroxylation took place using hydrogen peroxide as an oxidant in water under mild condition in shorter period of time. Easy recovery and reusability of heterogeneous catalyst without significant loss in catalytic yield was seen and the protocol was environmentally benign. The experimental part of the paper was very detailed, including the reaction process of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6Quality Control of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane)

4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6) can be used as a substrate in the study of Suzuki–Miyaura coupling of various aryl iodides over SiliaCat Pd(0).Quality Control of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane

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The author of 《Iridium-bipyridine periodic mesoporous organosilica catalyzed direct C-H borylation using a pinacolborane》 were Maegawa, Yoshifumi; Inagaki, Shinji. And the article was published in Dalton Transactions in 2015. Electric Literature of C14H21BO2 The author mentioned the following in the article:

Heterogeneous catalysis for direct C-H borylation of arenes and heteroarenes in the combination of iridium (Ir) complex fixed on periodic mesoporous organosilica containing bipyridine ligands within the framework (Ir-BPy-PMO) and pinacolborane (HBpin) is reported. Ir-BPy-PMO showed higher catalytic activity toward the borylation of benzene with inexpensive HBpin compared to expensive bis(pinacolato)diboron (B2pin2). The precatalyst could be handled without the use of a glove box. The catalyst was easily recovered from reaction mixtures by simple filtration under air. The recovered catalyst still showed good catalytic activity for at least three more times for the borylation of benzene. A variety of arenes and heteroarenes were successfully borylated with high boron efficiency by Ir-BPy-PMO using HBpin, whereas almost no activity was observed for borylation of some heteroarenes with B2pin2. The system using Ir-BPy-PMO and HBpin was also utilized in syntheses of multi-boronated thiophene-based building blocks containing ladder-, acenefused-, and fused-thiophene skeletons. The combination of a stable and reusable solid catalyst and inexpensive HBpin is expected to be superior to conventional approaches for the development of industrial applications. In the experiment, the researchers used many compounds, for example, 2-(3,4-Dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 401797-00-0Electric Literature of C14H21BO2)

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.Electric Literature of C14H21BO2 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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The author of 《Direct Electrosynthesis of Ketones from Benzylic Methylenes by Electrooxidative C-H Activation》 were Meng, Li; Su, Jihu; Zha, Zhenggen; Zhang, Li; Zhang, Zhenlei; Wang, Zhiyong. And the article was published in Chemistry – A European Journal in 2013. Electric Literature of C13H11ClO The author mentioned the following in the article:

Direct electrosynthesis of ketones R1C6H4C(O)R2 (R1 = H, 4-F, 4-AcO, 4-O2N, 3-Me, 2-Cl, etc.; R2 = Me, n-Pr, Ph, 4-MeC6H4) or α-tetralone in moderate to good yields from the corresponding benzylic methylenes R1C6H4CH2R2 or tetralin, resp., in an undivided cell is described. The method features a green oxidant of mass-free electrons, wide substrate scope and mild conditions. The reaction intermediate radical was detected by ESR spectroscopy, and the reaction mechanism was proposed.(3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3Electric Literature of C13H11ClO) was used in this study.

(3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3) 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.Electric Literature of C13H11ClO 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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Myerson, Jacob W.; Patel, Priyal N.; Rubey, Kathryn M.; Zamora, Marco E.; Zaleski, Michael H.; Habibi, Nahal; Walsh, Landis R.; Lee, Yi-Wei; Luther, David C.; Ferguson, Laura T.; Marcos-Contreras, Oscar A.; Glassman, Patrick M.; Mazaleuskaya, Liudmila L.; Johnston, Ian; Hood, Elizabeth D.; Shuvaeva, Tea; Wu, Jichuan; Zhang, Hong-Ying; Gregory, Jason V.; Kiseleva, Raisa Y.; Nong, Jia; Grosser, Tilo; Greineder, Colin F.; Mitragotri, Samir; Worthen, George S.; Rotello, Vincent M.; Lahann, Joerg; Muzykantov, Vladimir R.; Brenner, Jacob S. published an article on January 31 ,2022. The article was titled 《Supramolecular arrangement of protein in nanoparticle structures predicts nanoparticle tropism for neutrophils in acute lung inflammation》, and you may find the article in Nature Nanotechnology.Application In Synthesis of 2,5-Dioxopyrrolidin-1-yl 2-(acetylthio)acetate The information in the text is summarized as follows:

This study shows that the supramol. arrangement of proteins in nanoparticle structures predicts nanoparticle accumulation in neutrophils in acute lung inflammation (ALI). We observed homing to inflamed lungs for a variety of nanoparticles with agglutinated protein (NAPs), defined by arrangement of protein in or on the nanoparticles via hydrophobic interactions, crosslinking and electrostatic interactions. Nanoparticles with sym. protein arrangement (for example, viral capsids) had no selectivity for inflamed lungs. Flow cytometry and immunohistochem. showed NAPs have tropism for pulmonary neutrophils. Protein-conjugated liposomes were engineered to recapitulate NAP tropism for pulmonary neutrophils. NAP uptake in neutrophils was shown to depend on complement opsonization. We demonstrate diagnostic imaging of ALI with NAPs; show NAP tropism for inflamed human donor lungs; and show that NAPs can remediate pulmonary edema in ALI. This work demonstrates that structure-dependent tropism for neutrophils drives NAPs to inflamed lungs and shows NAPs can detect and treat ALI. In the experiment, the researchers used 2,5-Dioxopyrrolidin-1-yl 2-(acetylthio)acetate(cas: 76931-93-6Application In Synthesis of 2,5-Dioxopyrrolidin-1-yl 2-(acetylthio)acetate)

2,5-Dioxopyrrolidin-1-yl 2-(acetylthio)acetate(cas: 76931-93-6) belongs to pyrrolidine. Pyrrolidine being a good nucleophile easily undergoes electrophilic substitution reactions with different electrophiles such alkyl halides and acyl halides, and forms N-substituted pyrrolidines. N-Alkylpyrrolidine on further reaction with alkyl halide provided quaternary salts.Application In Synthesis of 2,5-Dioxopyrrolidin-1-yl 2-(acetylthio)acetate

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In 2012,Advanced Synthesis & Catalysis included an article by Tian, Yu; Sui, Yi; Gu, Yonghong; Tian, Shi-Kai. Formula: C13H11ClO. The article was titled 《Expedient synthesis of functionalized triarylmethanols through tandem formation of geminal C-C and C-O bonds》. The information in the text is summarized as follows:

The rearrangement-oxidation of N,N-disubstituted anilines and the formal dehydrogenative cross-coupling of diarylmethanols with aniline derivatives were developed for the preparation of sym. and unsym. functionalized triarylmethanols. Both reactions proceed smoothly in trifluoroacetic acid in the presence of an inexpensive oxidant (MnO2 or K2S2O8) and a catalytic amount of Pd(AcO)2 to give a range of functionalized triarylmethanols in moderate to good yields and with extremely high regioselectivity. The two unprecedented reactions involve tandem formation of geminal C-C and C-O bonds, and they are synthetically useful, atom-efficient, and operationally simple. The experimental part of the paper was very detailed, including the reaction process of (3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3Formula: C13H11ClO)

(3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3) belongs to hydroxy-containing compounds. Hydroxy groups participate in the dehydration reactions that link simple biological molecules into long chains. The joining of a fatty acid to glycerol to form a triacylglycerol removes the −OH from the carboxy end of the fatty acid.Formula: C13H11ClO

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