Month: January 2023

Mesomorphic substances. III. Nematic tolans was written by Malthete, Jacques;Leclercq, Martine;Dvolaitzky, Maya;Gabard, Jacqueline;Billard, Jean;Pontikis, Vassilis;Jacques, Jean. And the article was included in Molecular Crystals and Liquid Crystals in 1973.Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene This article mentions the following:

p,p’-Disubstituted diphenylacetylenes p-ROC6H4CCC6H4R’p are prepared Sym. and nonsym. diethers (R’ = OR and R’ = OR”) and p’-alkylated monoethers are described. Most of these compounds are nematic at temperatures <50%. The temperatures and heats of transition and electrooptical characteristics (εâŠ?and εâ€? of the compounds are given. The preparation of mesomorphic mixtures at room temperature is discussed. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene

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

Multiple Hydrogen Bond Channel Structural Electrolyte for an Enhanced Carbon Fiber Composite Battery was written by Choi, Jaehoon;Zabihi, Omid;Varley, Russell;Zhang, Jane;Fox, Bronwyn L.;Naebe, Minoo. And the article was included in ACS Applied Energy Materials in 2022.COA of Formula: C8H18O4 This article mentions the following:

Structural batteries made of carbon fiber composites have been receiving great attention for automotive application in the last decade. However, a structural battery electrolyte (SBE) for the structural batteries is conventionally dependent on utilizing highly volatile carbonate-derivative liquid electrolytes to provide moderate ionic conduction. This study introduces a SBE which fabricates as a two-phase system via reaction-induced phase transition as well as includes a hybridized electrolyte, consisting of a low flammability electrolyte with a solid additive-inducing multihydrogen bond. The proposed SBE is composed of a vinyl ester polymer containing triethylene glycol di-Me ether (TriG) and cyclohexanedimethanol (CHDM) as a quasi-solid additive. Confirmed by Fourier transform IR, Raman, and ⁷Li-NMR results, the contents of CHDM in the SBE structure play a crucial role not only through the plasticizing effect but also through the formation of a multidimension channel via a hydrogen bond, thereby contributing to enhancing the motion of the cation in the SBE. The optimized SBE (Li-TriG-CHDM10) shows an ionic conductivity of 2.0 x 10^-4 S cm^-1 with an E’ of ~300 MPa at ambient temperature To exhibit the possibility for a structural battery, the carbon fiber composite lamina was fabricated using an optimized SBE and evaluated as a battery half-cell, showing the potential of a high bearing mech. load and ion transport between the carbon fibers and the electrolytes. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2COA of Formula: C8H18O4).

2,5,8,11-Tetraoxadodecane (cas: 112-49-2) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. But on the other hand, ethers undergo cleavage by reaction with acids. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.COA of Formula: C8H18O4

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

Highly dispersed palladium nanoparticles supported on an imidazolium-based ionic liquid polymer: an efficient catalyst for oxidation of alcohols was written by Karimi, Z.;Hassanpour, A.;Kangari, S.;Marjani, A.. And the article was included in Russian Chemical Bulletin in 2022.Recommanded Product: 105-13-5 This article mentions the following:

An efficient and stable nanocatalyst for selective oxidation of alcs. was developed. It contains palladium nanoparticles, which are well distributed throughout the network of a copolymer based on an ionic liquid The synthesized nanomaterials were characterized by various techniques such as nitrogen adsorption-desorption anal., thermal gravimetric anal., TEM, and FTIR spectroscopy. A high surface area and the appropriate pore size of the nanocatalyst make active metal sites accessible to reagents, whereas the presence of an ionic liquid in the network of the polymer structure creates a good environment for the leaching protection and stabilization of extremely dispersed palladium nanoparticles. The availability and abundance of active sites of highly dispersed palladium nanoparticles make the synthesized nanocatalyst very promising for oxidation of alcs. The nanocatalyst has a number of features such as a high surface area, an appropriate size of pores with high catalytic activity, high thermal stability of the nanostructures, and low amounts of the ionic liquid needed for its synthesis. Using this nanocatalyst, carbonyl compounds were prepared from the corresponding alcs. in high yields. Addnl., the prepared nanocatalyst can easily be recovered by centrifugation after completion of the reactions and was reused five times without a significant loss in its catalytic activity. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Recommanded Product: 105-13-5).

(4-Methoxyphenyl)methanol (cas: 105-13-5) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Recommanded Product: 105-13-5

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

Influence of Porosity of Sulfide-Based Artificial Solid Electrolyte Interphases on Their Performance with Liquid and Solid Electrolytes in Li and Na Metal Batteries was written by Lim, Kyungmi;Fenk, Bernhard;Kuester, Kathrin;Acartuerk, Tolga;Weiss, Juergen;Starke, Ulrich;Popovic, Jelena;Maier, Joachim. And the article was included in ACS Applied Materials & Interfaces in 2022.SDS of cas: 112-49-2 This article mentions the following:

Realization of all-solid-state batteries combined with metallic Li/Na is still hindered due to the unstable interface between the alkali metal and solid electrolytes, especially for highly promising thiophosphate materials. Artificial and uniform solid-electrolyte interphases (SEIs), serving as thin ion-conducting films, have been considered as a strategy to overcome the issues of such reactive interfaces. Here, we synthesized sulfide-based artificial SEIs (Li_xS_y and Na_xS_y) on Li and Na by solid/gas reaction between the alkali metal and S vapor. The synthesized films are carefully characterized with various chem./electrochem. techniques. We show that these artificial SEIs are not beneficial from an application point of view since they either contribute to addnl. resistances (Li) or do not prevent reactions at the alkali metal/electrolyte interface (Na). We show that Na_xS_y is more porous than Li_xS_y, supported by (i) its rough morphol. observed by focused ion beam-SEM, (ii) the rapid decrease of R_interface (interfacial resistance) in Na_xS_y-covered-Na sym. cells with liquid electrolyte upon aging under open-circuit potential, and (iii) the increase of R_interface in Na_xS_y-covered-Na solid-state sym. cells with Na₃PS₄ electrolyte. The porous SEI allows the penetration of liquid electrolyte or alkali metal creep through its pores, resulting in a continuous chem. reaction. Hence, porosity of SEIs in general should be carefully taken into account in the application of batteries containing both liquid electrolyte and solid electrolyte. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2SDS of cas: 112-49-2).

2,5,8,11-Tetraoxadodecane (cas: 112-49-2) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. Ethyl ether is an excellent solvent for extractions and for a wide variety of chemical reactions. It is also used as a volatile starting fluid for diesel engines and gasoline engines in cold weather. Dimethyl ether is used as a spray propellant and refrigerant. Methyl t-butyl ether (MTBE) is a gasoline additive that boosts the octane number and reduces the amount of nitrogen-oxide pollutants in the exhaust. The ethers of ethylene glycol are used as solvents and plasticizers.SDS of cas: 112-49-2

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

Identification and characterization of five new classes of chlorogenic acids in burdock (Arctium lappa L.) roots by liquid chromatography/tandem mass spectrometry was written by Jaiswal, Rakesh;Kuhnert, Nikolai. And the article was included in Food & Function in 2011.HPLC of Formula: 6972-61-8 This article mentions the following:

Burdock (Arcticum lappa L.) roots are used in folk medicine and also as a vegetable in Asian countries especially Japan, Korea, and Thailand. We have used LC-MSⁿ (n = 2-4) to detect and characterize in burdock roots 15 quant. minor fumaric, succinic, and malic acid-containing chlorogenic acids, 11 of them not previously reported in nature. These comprise 3-succinoyl-4,5-dicaffeoyl or 1-succinoyl-3,4-dicaffeoylquinic acid, 1,5-dicaffeoyl-3-succinoylquinic acid, 1,5-dicaffeoyl-4-succinoylquinic acid, and 3,4-dicaffeoyl-5-succinoylquinic acid (M_r 616); 1,3-dicaffeoyl-5-fumaroylquinic acid and 1,5-dicaffeoyl-4-fumaroylquinic acid (M_r 614); 1,5-dicaffeoyl-3-maloylquinic acid, 1,4-dicaffeoyl-3-maloylquinic acid, and 1,5-dicaffeoyl-4-maloylquinic acid (M_r 632); 1,3,5-tricaffeoyl-4-succinoylquinic acid (M_r 778); 1,5-dicaffeoyl-3,4-disuccinoylquinic acid (M_r 716); 1,5-dicaffeoyl-3-fumaroyl-4-succinoylquinic acid and 1-fumaroyl-3,5-dicaffeoyl-4-succinoylquinic acid (M_r 714); dicaffeoyl-dimaloylquinic acid (M_r 748); and 1,5-dicaffeoyl-3-succinoyl-4-dimaloylquinic acid (M_r 732). All the structures have been assigned on the basis of LC-MSⁿ patterns of fragmentation, relative hydrophobicity, and analogy of fragmentation patterns if compared to caffeoylquinic acids. In the experiment, the researchers used many compounds, for example, 3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8HPLC of Formula: 6972-61-8).

3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly autoxidize to form hydroperoxides and dialkyl peroxides. If concentrated or heated, these peroxides may explode. To prevent such explosions, ethers should be obtained in small quantities, kept in tightly sealed containers, and used promptly.HPLC of Formula: 6972-61-8

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

mCPBA-Mediated Intramolecular Oxidative Annulation of ortho-Crotyl or Cinnamyl Arylaldehydes: Synthesis of Benzofused Five-, Six-, and Seven-Membered Oxacycles was written by Chang, Meng-Yang;Hsiao, Yu-Ting;Lai, Kai-Hsiang. And the article was included in Journal of Organic Chemistry in 2018.Related Products of 57179-35-8 This article mentions the following:

MCPBA-mediated intramol. oxidative annulation of ortho-crotyl or cinnamyl arylaldehydes provides chroman, coumaran, isochroman, and tetrahydrobenzo[c]oxepine under different reaction conditions. This research investigates the reaction conditions for facile and efficient transformation. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8Related Products of 57179-35-8).

3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8) belongs to ethers. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).Related Products of 57179-35-8

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

Photogenerated Azido Radical Mediated Oxidation: Access to Carbonyl Functionality from Alcohols, Alkylarenes, and Olefins via Organophotoredox was written by Shee, Maniklal;Singh, N. D. Pradeep. And the article was included in Advanced Synthesis & Catalysis in 2022.Recommanded Product: 105-13-5 This article mentions the following:

Azido radical mediated photocatalytic oxidation method for the selective oxidation of various well-known feedstocks, such as (hetero)aromatic, or aliphatic alcs., e.g., 1H-indole-3-methanol alkylarenes, e.g., 1,2,3,4-tetrahydronaphthalene and terminal alkenes, e.g., 1-methylidene-1,2,3,4-tetrahydronaphthalene, is successfully accomplished. Herein, the catalytic HAT and reversible addition/elimination strategies of azido radical have been explored to convert the commonly oxidizable functionalities into invaluable carbonyls, e.g., 1H-indole-3-carbaldehyde or tertiary alcs. using an organic photocatalyst 4CzIPN with tetra-Bu ammonium azide (TBAN₃) and air/O₂ as an oxidant. Indeed, this mild, operationally simple, and productive method offers good to excellent product yields with a wide range of structurally diverse substrates, including pharmaceutical derivatives with good functional group tolerance. Several control experiments have been carried out to investigate the detailed reaction mechanism. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Recommanded Product: 105-13-5).

(4-Methoxyphenyl)methanol (cas: 105-13-5) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Ethers can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Recommanded Product: 105-13-5

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

Nitrogen derivatives of 2,3,6,7-tetramethoxy-9-methylfluorene was written by Matarasso-Tchiroukhine, E.. And the article was included in Compt. rend. in 1959.Safety of 4-(2,2-Diethoxyethyl)morpholine This article mentions the following:

Heterocyclic bases, morpholine and piperidine, in excess (25 mL.), refluxed (1 h.) with 2,3,6,7-tetramethoxy-9-(bromomethyl)fluorene (I) yield, resp., 2,3,6,7-tetramethoxy-9-(morpholinomethyl)fluorene (II) and 2,3,6,7-tetramethoxy – 9 – (piperidinomethyl)fluorene (III); this reaction is shown to proceed in 2 steps: (1) the base dehydrobrominates I to 2,3,6,7-tetramethoxy-9-[methylene]fluorene (IV), (2) the amine in excess adds on the methylenic double bond of IV, as confirmed, by the action of morpholine and piperidine with IV to give II and III. To prove their structure II and III are also synthesized by condensing, resp., di-Et ω-morpholinoacetal (V) and di-Et ω-piperidinoacetal (VI) with 3,4,3′,4′-tetramethoxybiphenyl, in the cold, in AcOH-H₂SO₄. V and VI are prepared from morpholine and piperidine with BrCH₂CH(OEt)₂. The compounds obtained, their characteristics and yields are: II, silky white needles (C₆H₆), m. 214-15°, picrate, orange-red needles (EtOH), m. 232° (decomposition), III, prismatic needles (MeOH), m. 169°, 60-80%; picrate, prismatic red needles (MeOH), crystallizes with 2 mols. MeOH, m. 155°; V, b₁₆ 123-4°, n^D₂₀ 1.444, 73%; picrate, yellow needles (MeOH), m. 130-1°. VI, light yellow liquid, b₁₆ 102-4°, 50%; picrate, yellow prisms (aqueous MeOH), m. 68-9°. II and III refluxed with MeI in absolute EtOH (a large excess (20 mL.) of MeI and 17 h. refluxing are necessary in the case of III, 2 g.) give the corresponding quaternary ammonium salts, white crystals (EtOH), C₂₃H₃₀O₅NI (VII), m. 245°; C₂₄H₃₂O₄NI (VIII), decompose in the heat to IV, m. 237-8°; VII and VIII with picric acid in EtOH yield red picrates, crystallizing with 1 mL. H₂O, m. with decomposition and m. 207°, resp. In the experiment, the researchers used many compounds, for example, 4-(2,2-Diethoxyethyl)morpholine (cas: 3616-59-9Safety of 4-(2,2-Diethoxyethyl)morpholine).

4-(2,2-Diethoxyethyl)morpholine (cas: 3616-59-9) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. But on the other hand, ethers undergo cleavage by reaction with acids. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).Safety of 4-(2,2-Diethoxyethyl)morpholine

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

Study on heat release behavior of Cunninghamia lanceolata biomass by TD-GC-MS was written by Ma, Qing-zhi;Zhang, Dang-quan;Liu, Qi-mei;Peng, Wan-xi. And the article was included in Advanced Materials Research (Zuerich, Switzerland) in 2010.Category: ethers-buliding-blocks This article mentions the following:

Cunninghamia lanceolata has been the dominated species of plantation forest in South China. And thermoplasticization can decreases the hydroscopicity to increase the addnl. value of Cunninghamia lanceolata biomass. However, many heat release volatiles would produce air pollution during thermoplasticization process. Therefore, the heat release behavior of Cunninghamia lanceolata biomass was studied by TD-GC/MS to make full use of and prevent the pollution of the volatile materials. The main constituents were cedrol(34.34%), phenol, 2,4-bis(1,1-dimethylethyl)(11.49%), acetic acid(6.83%), carbon disulfide(3.1%), etc at 150°C. And the main constituents were acetic acid(20.22%), cedrol(17.20%), 1h-3a,7-methanoazulene, 2,3,4,7,8, 8a-hexahydro-3,6,8,8-tetramethyl-(3.58%), benzofuran, 2,3-dihydro-(3.26%), etc at 180°C. The heat release volatiles of Cunninghamia lanceolata biomass might be used as raw materials of bioenergy, rare biomedicines, and so on. Particularly, the volatiles had good application prospects and popularized value in purification of cedrol and acetic acid. In the experiment, the researchers used many compounds, for example, 1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol (cas: 20324-33-8Category: ethers-buliding-blocks).

1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol (cas: 20324-33-8) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Category: ethers-buliding-blocks

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

Synthesis of a New Diaazacrown Ether Compound Interconnected with an Azacrown Ether and Decorated with a Long Lipophilic Chain was written by Dhainaut, Jeremy;Chappaz, Alban;Bernard, Didier;Chaumeil, Helene;Daou, T. Jean;Defoin, Albert;Rouleau, Loic;Bats, Nicolas;Harbuzaru, Bogdan;Patarin, Joel. And the article was included in Synthetic Communications in 2014.Computed Properties of C10H21NO4 This article mentions the following:

The synthesis of an original compound consisting of an azacrown ether interconnected with a diazacrown ether bearing an alkyl chain is described herein. This derivative is promising for numerous applications. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Computed Properties of C10H21NO4).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. Ethyl ether is an excellent solvent for extractions and for a wide variety of chemical reactions. It is also used as a volatile starting fluid for diesel engines and gasoline engines in cold weather. Dimethyl ether is used as a spray propellant and refrigerant. Methyl t-butyl ether (MTBE) is a gasoline additive that boosts the octane number and reduces the amount of nitrogen-oxide pollutants in the exhaust. The ethers of ethylene glycol are used as solvents and plasticizers.Computed Properties of C10H21NO4

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