Tag: 100-200

Chen, Pin-Ru; Lai, Kuo-Yang; Chen, Hsueh-Shih published an article in 2021, the title of the article was Roles of alcohols and existing metal ions in surface chemistry and photoluminescence of InP cores.Computed Properties of 143-10-2 And the article contains the following content:

Surface oxidation and chem. determine the optical properties of indium phosphide (InP) nanocrystals (NCs). In this study, existing metal ions from the reaction residuals and alcs. normally used in the washing process are investigated. It is found that existing metal ions and alcs. play key roles in the surface oxidation and potential surface reactions of aminophosphine-based InP NCs, which significantly affect their photoluminescence (PL), optical absorption and photo-stability. According to XPS anal., InP NCs after aging form InPOx oxide which could passivate the NC surface along with increased PL intensity and blue-shifted spectral peaks. Treating with the existing metal ions from reaction residuals and intentionally added alcs. (methanol or ethanol), InP NCs exhibit an enhanced PL quantum yield (QY) (~25 times, from 0.1% to 2.5%), unexpected red-shifted spectral peaks and improved photo-stability (~9 folds). The phenomenon is ascribed to the passivation effect of the ZnyIn1-yPOx layer formed from coupling of existing Zn2+ with the NC surface triggered by the alcs. The alcs. are found to facilitate the surface modification of amine-capped NCs and may be utilized as agents in NC surface modifications. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Computed Properties of 143-10-2

The Article related to indium phosphide nanocrystal alc surface oxidation photoluminescence optical property, Optical, Electron, and Mass Spectroscopy and Other Related Properties: Optical Properties (Linear) and other aspects.Computed Properties of 143-10-2

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On December 31, 2020, DeLeon, Michelle; Baldelli, Steve published an article.Electric Literature of 143-10-2 The title of the article was Electroreductive desorption of alkanethiols on gold and UPD copper/gold surfaces using in situ second harmonic generation. And the article contained the following:

The reductive desorption of three alkanethiols: 1-decanethiol (DT), 1-dodecanethiol (DDT), and 1-octadecanethiol (ODT) was studied. Real-time second harmonic generation (SHG) was used to monitor changes at the surface as the self-assembled monolayer was electrodesorbed from a gold and UPD Cu/Au electrode through cyclic voltammetry (CV). Before and after reductive desorption, samples are examined ex situ with sum frequency generation (SFG) spectroscopy, XPS, and contact angle (CA). These techniques confirmed the electrodesorption of short-chain alkanethiols, while long-chain alkanethiols were proven to remain near the surface of the electrode. However, a difference was observed for a DDT monolayer on the UPD Cu/Au electrode. While DDT was easily desorbed from a gold substrate, DDT on the UPD Cu/Au electrode behaved similarly to a long-chain alkanethiol on gold. Significantly, SHG was able to determine the relative alkanethiol coverage even while the desorption-features in the CV were obscured by the hydrogen evolution current. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Electric Literature of 143-10-2

The Article related to alkanethiols gold copper second harmonic generation electroreductive desorption, Optical, Electron, and Mass Spectroscopy and Other Related Properties: Optical Properties (Linear) and other aspects.Electric Literature of 143-10-2

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On October 15, 1981, Jacobi, Haireddin; Opitz, Wolfgang published a patent.Synthetic Route of 72364-46-6 The title of the patent was S-Alkyl 3-(alkylthio)thiopropionates and their use in drugs. And the patent contained the following:

R1SCH2CH2C(O)SR [R, R1 = alkyl optionally substituted with amino, aryl, heteroaryl, etc., (in turn optionally substituted with 1-3 halo, alkyl, nitro, alkoxy, etc.), cycloalkyl] were prepared as inflammation inhibitors (no data). Thus 0.81 mL CH2:CHCOCl was added in portions to 4.28 g 3,4,5-(MeO)3C6H2CH2SH and 8 mL 5% NaOH at room temperature, and the mixture was stirred to the end of the exotherm to give 32.1% I. The experimental process involved the reaction of (2-Fluorophenyl)methanethiol(cas: 72364-46-6).Synthetic Route of 72364-46-6

The Article related to thio ester aralkyl antiinflammatory, propionate thio benzyl antiinflammatory, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Esters, Acyl Peroxides, Acyl Halides and other aspects.Synthetic Route of 72364-46-6

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Grabska-Kobylecka, Izabela; Kaczmarek-Bak, Justyna; Figlus, Malgorzata; Prymont-Przyminska, Anna; Zwolinska, Anna; Sarniak, Agata; Wlodarczyk, Anna; Glabinski, Andrzej; Nowak, Dariusz published an article in 2020, the title of the article was The presence of caffeic acid in cerebrospinal fluid: evidence that dietary polyphenols can cross the blood-brain barrier in humans.Synthetic Route of 621-37-4 And the article contains the following content:

Epidemiol. data indicate that a diet rich in plant polyphenols has a pos. effect on brain functions, improving memory and cognition in humans. Direct activity of ingested phenolics on brain neurons may be one of plausible mechanisms explaining these data. This also suggests that some phenolics can cross the blood-brain barrier and be present in the brain or cerebrospinal fluid. We measured 12 phenolics (a combination of the solid-phase extraction technique with high-performance liquid chromatog.) in cerebrospinal fluid and matched plasma samples from 28 patients undergoing diagnostic lumbar puncture due to neurol. disorders. Homovanillic acid, 3-hydroxyphenyl acetic acid and caffeic acid were detectable in cerebrospinal fluid reaching concentrations (median; interquartile range) 0.18; 0.14μmol/L, 4.35; 7.36μmol/L and 0.02; 0.01μmol/L, resp. Plasma concentrations of caffeic acid (0.03; 0.01μmol/L) did not correlate with those in cerebrospinal fluid (ρ = -0.109, p = 0.58). Because food (fruits and vegetables) is the only source of caffeic acid in human body fluids, our results indicate that the same dietary phenolics can cross blood-brain barrier in humans, and that transportation of caffeic acid through this barrier is not the result of simple or facilitated diffusion. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).Synthetic Route of 621-37-4

The Article related to caffeic acid dietary polyphenol blood brain barrier cerebrospinal fluid, blood-brain barrier, caffeic acid, cerebrospinal fluid, dietary polyphenols, plant phenolics, Pharmacology: Effects Of Nervous System- and Behavior-Affecting Drugs and Neuromuscular Agents and other aspects.Synthetic Route of 621-37-4

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On September 29, 2017, Shen, Peng; Hu, Qingchuan; Dong, Meixue; Bai, Shunjie; Liang, Zihong; Chen, Zhi; Li, Pengfei; Hu, Zicheng; Zhong, Xiaogang; Zhu, Dan; Wang, Haiyang; Xie, Peng published an article.Reference of H-Phg(4-OH)-OH The title of the article was Venlafaxine exerts antidepressant effects possibly by activating MAPK-ERK1/2 and P13K-AKT pathways in the hippocampus. And the article contained the following:

Serotonin noradrenaline reuptake inhibitors are effective antidepressant drugs, which include venlafaxine and duloxetine. Venlafaxine is commonly used in a clin. context, but the mol. biol. mechanisms behind its effects have not been fully determined Here, we explored the potential biol. effects of venlafaxine on mouse hippocampus. Mice were randomly divided into two groups and injected daily with 0.9% NaCl solution or venlafaxine. A GC-MS-based metabolomic approach was used to identify possible metabolic differences between these groups, and the key proteins involved in the relevant pathways were validated by western blotting. In our experiments, 27 hippocampal metabolites that distinguished the venlafaxine group from the control group were identified. These differential metabolites were subjected to Ingenuity Pathway Anal., which revealed that they were strongly related to two metabolic pathways (MAPK-ERK1/2 and P13K-AKT signaling pathways). Six key proteins, BDNF, p-c-Raf, p-MAPK, p-MEK, p-AKT, and CREB, were verified by western blotting and the results were consistent with the differential metabolites identified by GC-MS. This study sheds light on the biol. mechanisms underlying the effects of venlafaxine. The experimental process involved the reaction of H-Phg(4-OH)-OH(cas: 32462-30-9).Reference of H-Phg(4-OH)-OH

The Article related to venlafaxine antidepressant hippocampus mapk erk1 erk2 p13k akt, antidepressant, hippocampus, mechanism, metabolomics, venlafaxine, western blotting, Pharmacology: Effects Of Nervous System- and Behavior-Affecting Drugs and Neuromuscular Agents and other aspects.Reference of H-Phg(4-OH)-OH

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On September 30, 2022, Xu, Shuguang; Tian, Qing; Xiao, Yuan; Zhang, Wenyu; Liao, Shengqi; Li, Jianmei; Hu, Changwei published an article.Computed Properties of 473-81-4 The title of the article was Regulating the competitive reaction pathway in glycerol conversion to lactic acid/glycolic acid selectively. And the article contained the following:

The numerous parallel reactions in glycerol conversion substantially challenge the effective synthesis of target chem. from oversupplied glycerol. Herein, we intensively studied the control of the complex reaction network in glycerol conversion, and realized the selective production of lactic acid or glycolic acid by integrating the use of different bases with Cu/γ-Al2O3 catalyst. The results indicated that base promoted the oxidation dehydrogenation of glycerol over Cu/γ-Al2O3 catalyst to glyceraldehyde intermediate. Remarkably, base significantly contributed to the control of the competitive reactions in the next glyceraldehyde transformation. DFT calculation revealed that strong base (NaOH) independently promoted the removal of H in C2 of glyceraldehyde, thereby facilitating the dehydration reaction and leading to the selective production of lactic acid. Combing with First-principles calculation, it was revealed that both NaHCO3 and CuO species contributed to increase the electrophilicity of C2 and C3 in glyceraldehyde, thereby directing the conversion of the resultant glyceraldehyde intermediate towards the cleavage of C2-C3 to glycolal. Cu/γ-Al2O3 then sep. catalyzed the oxidation of glycolal selectively to glycolic acid. This work might provide a promising approach and give some clues for the valorization of glycerol in widespread applications, thus affording profitable possibilities for the sustainable biodiesel. The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).Computed Properties of 473-81-4

The Article related to glycerol oxidation dehydrogenation lactic glycolic acid copper alumina catalyst, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Computed Properties of 473-81-4

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On February 18, 2022, Schmidt, Michael A. published an article.Reference of Isochroman-3-ol The title of the article was Effect of Terminal Alkylation of Aryl and Heteroaryl Hydrazines in the Fischer Indole Synthesis. And the article contained the following:

The effect of alkylation on the terminal position of aryl and heteroaryl hydrazines in the Fischer indole synthesis was examined Compared to their unalkylated counterparts, reactions using alkylated s provided indole products with higher yields and faster rates. The reactions can be conducted at lower temperatures and are compatible with acid-sensitive functionality. The terminally alkylated hydrazines were readily prepared by a new two-step sequence and held as stable hydrazinium salts. The mild formation of the salts along with the favorable Fischer indole reaction conditions highlights the potential of this approach in later-stage synthetic use. The experimental process involved the reaction of Isochroman-3-ol(cas: 42900-89-0).Reference of Isochroman-3-ol

The Article related to fischer indole synthesis, hydrazine ketone alkylation amidation cross coupling, Heterocyclic Compounds (One Hetero Atom): Indoles, Indolizines, Carbazoles, and Other Arenopyrroles and other aspects.Reference of Isochroman-3-ol

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On January 31, 2021, Fu, Xiaomin; Ren, Xiaoqian; Shen, Jiecan; Jiang, Yong; Wang, Yuehua; Orooji, Yasin; Xu, Wenlong; Liang, Jinhua published an article.Electric Literature of 111-29-5 The title of the article was Synergistic catalytic hydrogenation of furfural to 1,2-pentanediol and 1,5-pentanediol with LDO derived from CuMgAl hydrotalcite. And the article contained the following:

A series of layer double metal oxides (LDO) from CuMgAl hydrotalcite precursors were prepared by urea decomposition under different calcination temperatures in this work. Various characterizations including x-ray diffraction, SEM, FTIR, XPS, H2-TPR, NH3-TPD and CO2-TPD were carried out to investigate the structural properties of the as-prepared samples. After calcination at certain temperatures, the resulted LDO presents the excellent catalytic property in the selective hydrogenolysis of furfural (FA) to 1,2-pentanediol (1,2-PeD) and 1,5-pentanediol (1,5-PeD). The Cu+/Cu2+ ratio and the acid-base amount from the calcination process play the key role in the catalytic performance towards this reaction. The optimal catalyst (CuMgAlO-S3) with the maximal Cu+/Cu2+ ratio and the acid-base amount exhibits the best catalytic performance towards hydrogenation of furfural to 1,2-pentanediol (selectivity 55.2%.) and 1,5-pentanediol (selectivity 28.5%) with more than 80% of conversion rate, which indicated the selectivity of 1,2- and 1,5-PeDs counted on the synergistic effect of Cu+ and acid-base properties. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Electric Literature of 111-29-5

The Article related to hydrotalcite layered double oxide catalyst furfural hydrogenolysis pentanediol, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Electric Literature of 111-29-5

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Li, Xinsheng; Pang, Jifeng; Zhang, Jingcai; Li, Xianquan; Jiang, Yu; Su, Yang; Li, Weizhen; Zheng, Mingyuan published an article in 2021, the title of the article was Tuning the reaction selectivity over MgAl spinel-supported Pt catalyst in furfuryl alcohol conversion to pentanediols.Formula: C5H12O2 And the article contains the following content:

Catalytic conversion of biomass-derived feedstock to high-value chems. is of remarkable significance for alleviating dependence on fossil energy resources. MgAl spinel-supported Pt catalysts were prepared and used in furfuryl alc. conversion. The approaches to tune the reaction selectivity toward pentanediols (PeDs) were investigated and the catalytic performance was correlated to the catalysts’ physicochem. properties based on comprehensive characterizations. It was found that 1-8 weight% Pt was highly dispersed on the MgAl2O4 support as nanoparticles with small sizes of 1-3 nm. The reaction selectivity did not show dependence on the size of Pt nanoparticles. Introducing LiOH onto the support effectively steered the reaction products toward the PeDs at the expense of tetrahydrofurfuryl alc. (THFA) selectivity. Meanwhile, the major product in PeDs was shifted from 1,5-PeD to 1,2-PeD. The reasons for the PeDs selectivity enhancement were attributed to the generation of a large number of medium-strong base sites on the Li-modified Pt catalyst. The reaction temperature is another effective factor to tune the reaction selectivity. At 230°C, PeDs selectivity was enhanced to 77.4% with a 1,2-PeD to 1,5-PeD ratio of 3.7 over 4Pt/10Li/MgAl2O4. The Pt/Li/MgAl2O4 catalyst was robust to be reused five times without deactivation. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Formula: C5H12O2

The Article related to pentanediol furfuryl alc magnesium aluminate platinum catalyst tuning reaction, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Formula: C5H12O2

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On November 13, 2014, Rayer, Aravind V.; Sumon, Kazi Z.; Jaffari, Laila; Henni, Amr published an article.Product Details of 2160-93-2 The title of the article was Dissociation Constants (pKa) of Tertiary and Cyclic Amines: Structural and Temperature Dependences. And the article contained the following:

The dissociation constants of the conjugate acids of 14 amines (diethylethanolamine, monoethanolamine, n-butyldiethanolamine, t-butyldiethanolamine, n,n-dimethylpropanolamine, methyl-diethanolamine, ethyldiethanolamine, monoethylethanolamine, n,n-dimethylisopropanolamine, triethanolamine, 4-methylpiperazine-1-amine, 3-morpholino propylamine, 4,2-hydroxylethylmorpholine, and triethylamine) were measured over a temperature range between 293.15 and 333.15 K using the potentiometric titration method. The change in standard state thermodn. properties was derived from the van’t Hoff equation. The influence of the steric hindrance, number of -OH groups, and length of alkyl chain on the dissociation constants was identified. Of the studied amines, few sterically hindered derivatives of piperazine, a secondary amine monoethylethanolamine, and a tertiary amine n,n-dimethylpropanolamine have high pKa values but lower standard enthalpy than those of the benchmark amine, monoethanolamine (MEA), and thus were deemed promising for CO2 capture technol. Monoethylethanolamine (MEEA) was found to have the highest basicity (pKa) with the lowest standard state enthalpy (ΔH°/kJ·mol-1). The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Product Details of 2160-93-2

The Article related to dissociation constant tertiary cyclic amine structural temperature dependence, Phase Equilibriums, Chemical Equilibriums, and Solutions: Acid-Base Equilibriums, Complex Formation and other aspects.Product Details of 2160-93-2

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