Tag: 100-200

On November 30, 2021, Liu, Jinguang; Liu, Yuqian; Wang, Anqi; Dai, Zhen; Wang, Rui; Sun, Hui; Strappe, Padraig; Zhou, Zhongkai published an article.Safety of 1,2-Dimethoxybenzene The title of the article was Characteristics of moisture migration and volatile compounds of rice stored under various storage conditions. And the article contained the following:

Yellowing is associated with the changes in rice quality during storage. This study revealed that the increased yellowness of rice was highly associated with the moisture content of rice during storage. The hysteresis loop formed by sorption and desorption curves showed that the water loss of japonica rice was the largest, suggesting the internal structure of japonica rice was more vulnerable to be damaged. The heat enthalpy of rice increased first, and then decreased during yellowing, indicating the changes in the corresponding rice structure. The changes in the moisture migration were monitored by low-field NMR, and the data showed that the content of tightly bound water decreased during yellowing, and the tightly bound water transferred to higher fluidity in medium moisture content (MMC) and higher moisture content (HMC) sample. The concentration of most esters, ketones and alcs. of rice was increased during yellowing in a lower moisture content (LMC) sample. This study revealed that the yellowing process could inhibit the release of some volatiles for MMC and HMC samples. The increased 1,2-dimethoxy-benzene and phenol in HMC sample during yellowing were the characteristic volatiles for the highest yellowed rice samples. This study may highlight the further understanding of rice yellowing mechanism. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Safety of 1,2-Dimethoxybenzene

The Article related to yellowing hysteresis desorption storage japonica, Food and Feed Chemistry: Packaging, Preservation, and Processing and other aspects.Safety of 1,2-Dimethoxybenzene

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On May 21, 2021, Kuleshova, Olena; Asako, Sobi; Ilies, Laurean published an article.Computed Properties of 321-28-8 The title of the article was Ligand-Enabled, Iridium-Catalyzed ortho-Borylation of Fluoroarenes. And the article contained the following:

A terpyridine derivative and an iridium complex catalyze the C-H borylation of a stoichiometric amount of a fluoroarene with high ortho-selectivity and tolerance of functional groups such as bromide, chloride, ester, ketone, amine, and in situ-borylated hydroxyl. Complex drug mols. such as haloperidol can be selectively borylated ortho to the F atom. The terpyridine ligand undergoes rollover cyclometalation to produce an N,N,C-coordinated iridium complex, which may either selectively borylate the fluoroarene by itself or undergo reductive elimination to produce a borylated ligand. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Computed Properties of 321-28-8

The Article related to fluoroarene directed ortho borylation iridium catalyst preparation arylboronic ester, terpyridine iridium complex catalyst directed ortho borylation aryl fluoride, Organometallic and Organometalloidal Compounds: Boron Compounds and other aspects.Computed Properties of 321-28-8

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 27, 2022, Bole, Leonie J.; Tortajada, Andreu; Hevia, Eva published an article.HPLC of Formula: 93-04-9 The title of the article was Enhancing Metalating Efficiency of the Sodium Amide NaTMP in Arene Borylation Applications. And the article contained the following:

Though LiTMP (TMP = 2,2,6,6-tetramethylpiperidide) is a commonly used amide, surprisingly the heavier NaTMP has hardly been utilized. Here, by mixing NaTMP with tridentate donor PMDETA (N,N,N’,N”,N”-pentamethyldiethylenetriamine), we provide structural, and mechanistic insights into the sodiation of non-activated arenes (e.g. anisole and benzene). While these reactions are low yielding, adding B(OiPr)3 has a profound effect, not only by intercepting the CAr-Na bond, but also by driving the metalation reaction towards quant. formation of more stabilized sodium aryl boronates. Demonstrating its metalating power, regioselective C2-metalation/borylation of naphthalene has been accomplished contrasting with single-metal based protocols which are unselective and low yielding. Extension to other arenes allows for in situ generation of aryl boronates which can then directly engage in Suzuki-Miyaura couplings, furnishing a range of biaryls in a selective and efficient manner. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).HPLC of Formula: 93-04-9

The Article related to metalation arene sodium amide borylation suzuki coupling preparation biaryl, amide, borylation, metalation, sodium, structural elucidation, Organometallic and Organometalloidal Compounds: Boron Compounds and other aspects.HPLC of Formula: 93-04-9

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Ether – Wikipedia,
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On October 31, 2007, Al-Hamarneh, Ibrahim F.; Pedrow, Patrick D.; Goheen, Steven C.; Hartenstine, Michael J. published an article.SDS of cas: 929-37-3 The title of the article was Impedance spectroscopy study of composite thin films of hydrated polyethylene glycol. And the article contained the following:

A polyethylene glycol (PEG) polymer was synthesized using a dip-coating procedure on 316L stainless-steel (SS) substrate precoated with a primer that consisted of radio-frequency inductively coupled plasma-polymerized di(ethylene glycol) vinyl ether (EO2V). The primer and PEG composite film was studied with profilometer, optical microscope, scanning electron microscope (SEM), and a tape test to evaluate thickness, coverage, morphol., and adhesion, resp. Response of the PEG composite film to an applied ac voltage was studied as a function of hydration state using impedance spectroscopy (IS). A resistor/capacitor network was used to interpret the impedance spectra. Elec. capacitance of the PEG film decreased with an exponentially decaying term as dehydration progressed. PEG-film capacitance decay was consistent with a model describing water mols. diffusing through the PEG film. The experimental process involved the reaction of 2-(2-(Vinyloxy)ethoxy)ethanol(cas: 929-37-3).SDS of cas: 929-37-3

The Article related to hydrated polyethylene glycol composite thin film impedance, Electric Phenomena: Conductors, Semiconductors, Resistors, Contacts and other aspects.SDS of cas: 929-37-3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On July 31, 2022, Earley, J. D.; Zieleniewska, A.; Ripberger, H. H.; Shin, N. Y.; Lazorski, M. S.; Mast, Z. J.; Sayre, H. J.; McCusker, J. K.; Scholes, G. D.; Knowles, R. R.; Reid, O. G.; Rumbles, G. published an article.Safety of 1,4-Dimethoxybenzene The title of the article was Ion-pair reorganization regulates reactivity in photoredox catalysts. And the article contained the following:

Cyclometalated and polypyridyl complexes of d6 metals are promising photoredox catalysts, using light to drive reactions with high kinetic or thermodn. barriers via the generation of reactive radical intermediates. However, while tuning of their redox potentials, absorption energy, excited-state lifetime and quantum yield are well-known criteria for modifying activity, other factors could be important. Here we show that dynamic ion-pair reorganization controls the reactivity of a photoredox catalyst, [Ir[dF(CF3)ppy]2(dtbpy)]X. Time-resolved dielec.-loss experiments show how counter-ion identity influences excited-state charge distribution, evincing large differences in both the ground- and excited-state dipole moment depending on whether X is a small associating anion (PF6-) that forms a contact-ion pair vs. a large one that either dissociates or forms a solvent-separated pair (BArF4-). These differences correlate with the reactivity of the photocatalyst toward both reductive and oxidative electron transfer, amounting to a 4-fold change in selectivity toward oxidation vs. reduction These results suggest that ion pairing could be an underappreciated factor that modulates reactivity in ionic photoredox catalysts. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Safety of 1,4-Dimethoxybenzene

The Article related to iridium complex photoredox catalyst counter ion effect, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Safety of 1,4-Dimethoxybenzene

Referemce:
Ether – Wikipedia,
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On November 30, 2020, Bolt, Ya. V.; Tsarkova, A. S.; Baleeva, N. S. published an article.Formula: C8H10O2 The title of the article was 6,7-Dialkoxy-Benzothiophene Derivatives as the Basis for Synthesis of Fluorescent Sensors for Reactive Oxygen Species. And the article contained the following:

Abstract: We suggest the use of the 6,7-dialkoxy-benzothiophene derivatives as the basis for synthesis of fluorescent sensors for reactive oxygen species. The corresponding dioxide, a potential product of oxidation, that might be generated during ROS detection, was synthesized. We have established that benzothiophene derivatives could be successfully used for synthesis of fluorescent sensors, due to the noticeable shift of the absorption and emission maxima that occurs during oxidation The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Formula: C8H10O2

The Article related to dialkoxybenzothiophene fluorescent sensor, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Formula: C8H10O2

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On September 5, 2022, Cha, Youngho; Kim, Tae-Kyoung; Lee, Jaewon; Kim, Taeyeon; Hong, Ae-Jung; Zoh, Kyung-Duk published an article.Computed Properties of 150-78-7 The title of the article was Degradation of iopromide during the UV-LED/chlorine reaction: Effect of wavelength, radical contribution, transformation products, and toxicity. And the article contained the following:

Three different UV-LED wavelengths (265, 310, and 365 nm) were used in the UV-LED/chlorine reaction to investigate the degradation mechanism of iopromide (IPM) at different wavelengths, a representative iodinated contrast media compound The degradation rate (k’IPM) increased from pH 6-8 at 265 nm, but, decreased as the pH increased up to 9 at 310 nm and 365 nm. Radical scavenging experiments showed that reactive chlorine species (RCS) are the dominant radical species at all wavelengths, but a higher contribution of OH· was observed at lower pH and longer wavelengths. The contribution of RCS decreased but the contribution of OH· increased as the wavelength increased. Among RCS, the largest contribution was found to be ClO·. Total nine transformation products (TPs) were identified by LC-QTOF-MS during the UV-LED/chlorine reaction at 265 nm. Based on the identified TPs and their time profiles, we proposed a degradation pathway of IPM during UV-LED/chlorine reaction. The Microtox test using V. fischeri showed that no significant increase in toxicity was observed at all wavelengths. The synergistic effect of UV-LED and chlorine was greater at a higher wavelength by the elec. efficiency per order (EEO) calculation The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Computed Properties of 150-78-7

The Article related to iopromide chlorine reaction radical scavenging experiment, hydroxyl radical, microtox test, reactive chlorine species (rcs), transformation products (tps), uv-led, Waste Treatment and Disposal: Chemical Treatment Of Aqueous Wastes and other aspects.Computed Properties of 150-78-7

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 15, 2021, Ma, Chuan; Sanchez-Rodriguez, Daniel; Kamo, Tohru published an article.Application of 578-58-5 The title of the article was A comprehensive study on the oxidative pyrolysis of epoxy resin from fiber/epoxy composites: Product characteristics and kinetics. And the article contained the following:

Thermal treatment has been the most feasible process to recycle valuable carbon fibers and obtain fuel and chems. from waste fiber/epoxy composites. The present work studied the oxidative pyrolysis behaviors of epoxy resin from fiber/epoxy composites using a thermogravimetric apparatus and a fixed-bed reactor, resp. The effects of various O2 concentrations on the thermal behaviors of epoxy resin were investigated and the product characteristics were analyzed. Furthermore, a multi distributed activation energy model (multi-DAEM) was first developed to determine the oxidative pyrolysis kinetics of epoxy resin under various atmospheres. Results showed that the degradation behaviors of epoxy resin were largely altered by the O2 concentrations High O2 concentrations accelerated the primary decomposition of epoxy resin and shifted the oxidation of resin residue into lower temperatures High contents of methylcyclohexene and phenolic derivatives were detected in liquid products. In air atm., high yields of CO and CO2 were generated and distributed in several stages. The kinetic anal. indicated that the multi-DAEM method can well explain the oxidative pyrolysis behaviors of epoxy resin. A min. six-reaction fitting process can perfectly simulate the oxidative pyrolysis of epoxy resin. The predictions for various O2 concentrations were in good agreement with the exptl. tests. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Application of 578-58-5

The Article related to epoxy resin oxidative thermal treatment pyrolysis simulation, epoxy resin, kinetics, oxidation, product characteristics, pyrolysis, Waste Treatment and Disposal: Chemical Treatment Of Aqueous Wastes and other aspects.Application of 578-58-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On March 30, 2020, Zhang, Xiongfei; Zeng, Piaopiao; Zhang, Shuo; Chen, Zhiwei published an article.Related Products of 321-28-8 The title of the article was FeCl3-Mediated Friedel-Crafts Alkylation and Oxidative Annulations: Facile Synthesis of Benzofurans. And the article contained the following:

An efficient method for the facile synthesis of benzofurans through FeCl3-mediated intermol. tandem reaction of anisole with glyoxal monohydrates was reported. This process provided the privileged structures of benzofurans in moderate to good yields under mild conditions. This reaction has many advantages, such as readily available starting materials, high atom economy and good functional group tolerance. This is firstly reported that FeCl3, acting as both a Lewis acid and an oxidant, was used for the synthesis of benzofuran. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Related Products of 321-28-8

The Article related to benzofuran preparation iron catalyst, anisole glyoxal monohydrate friedel crafts alkylation oxidative annulation, Heterocyclic Compounds (One Hetero Atom): Areno- and Diarenofurans and other aspects.Related Products of 321-28-8

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On July 5, 2005, Kim, Hyun-Kyoung; Wang, Xiao-Shui; Fujita, Yukihiro; Sudo, Atsushi; Nishida, Haruo; Fujii, Masayuki; Endo, Takeshi published an article.Computed Properties of 929-37-3 The title of the article was Photomechanical switching behavior of semi-interpenetrating polymer network consisting of azobenzene-carrying crosslinked poly(vinyl ether) and polycarbonate. And the article contained the following:

A novel semi-interpenetrating polymer network (semi-IPN) with photomech. switching ability was developed by a cationic copolymerization of azobenzene-containing vinyl ethers in a matrix of a linear polycarbonate (PC). The semi-IPN film showed reversible deformation upon switching the UV irradiation on and off and responded with unprecedented rapidity. The photomech. effect is attributed to a reversible change between the highly aggregated and dissociated states of the azobenzene groups. The experimental process involved the reaction of 2-(2-(Vinyloxy)ethoxy)ethanol(cas: 929-37-3).Computed Properties of 929-37-3

The Article related to azobenzene polyvinyl ether polycarbonate semiinterpenetrating network photomech switching, Plastics Manufacture and Processing: Chemical Properties Of Resins and other aspects.Computed Properties of 929-37-3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem