Month: December 2022

Matadi, R. published the artcileInvestigation of the stiffness and yield behaviour of melt-intercalated poly(methyl methacrylate)/organoclay nanocomposites: characterisation and modelling, Product Details of C10H23N, the publication is Journal of Nanoscience and Nanotechnology (2010), 10(4), 2956-2961, database is CAplus and MEDLINE.

The elastic modulus and yield stress behavior of a melt intercalated Poly(methylmethacrylate)/organoclay (PMMA/C30B and PMMA/C20A) were studied using uniaxial tensile tests at different temperatures and different strain rate. The stress-strain response was obtained for different loading rates and different test temperature Both the stiffness and the yield stress were then clearly identified as function of strain rate and temperature Our exptl. results show that the yield stress and modulus of both PMMA/C20A and PMMA/C30B organoclay nanocomposites are very sensitive to clay concentration, strain rate and temperature A micromechanically-based composite approach was used to predict the yield stress of both PMMA/C20A and PMMA/C30B organoclay nanocomposites. The results obtained from the model are in good agreement with our exptl. results. As expected, the activation enthalpy of cooperative model increased slightly while the activation volume decreases slightly with the clay concentration

Journal of Nanoscience and Nanotechnology published new progress about 28056-87-3. 28056-87-3 belongs to catalysis-chemistry, auxiliary class Amine,Aliphatic hydrocarbon chain, name is 2-Ethyl-N,N-dimethylhexan-1-amine, and the molecular formula is C10H23N, Product Details of C10H23N.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Jana, Debasish published the artcileMannich reaction of pyrrole and dimethylpyrrole with monoamines and diamines, Synthetic Route of 10517-44-9, the publication is Tetrahedron Letters (2019), 60(46), 151247, database is CAplus.

The Mannich reaction of pyrrole with ethylenediamine dihydrochloride and formaldehyde gave two compounds: N¹,N¹,N²,N²-tetrakis(pyrrol-2-ylmethyl)ethane-1,2-diamine and 1,3-bis(pyrrol-2-ylmethyl)imidazolidine in poor yields. Conversely, the reaction of pyrrole with propylenediamine dihydrochloride afforded macrocyclic compound I in 50% yield. The reaction of 2,5-dimethylpyrrole with methylamine hydrochloride and formaldehyde gave novel bicycle II. The reaction of 2,5-dimethylpyrrole with ammonium chloride gave the tripodal ligand tris(2,5-dimethylpyrrol-3-yl)methylamine in 62% yield. The structures of 1,3-bis(pyrrol-2-ylmethyl)imidazolidine, I and II were determined by single crystal X-ray diffraction studies.

Tetrahedron Letters published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Synthetic Route of 10517-44-9.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Porcherie, Olivier published the artcileDirect syntheses using a fluorinated surfactant of silicas containing organofluorinated groups, Formula: C10H6F17N, the publication is New Journal of Chemistry (2005), 29(4), 538-543, database is CAplus.

Direct syntheses of silicas containing organofluorinated groups have been achieved by co-condensation of tetraethylorthosilicate (TEOS) and a organofluorinated triethoxysilane, R_F(CH₂)₂Si(OEt)₃ [R_F = CF₃(CF₂)₅ or CF₃], in the presence of either the neutral fluorinated surfactant n-CF₃(CF₂)₇(CH₂)₂NH₂ or the cationic one, n-CF₃(CF₂)₇(CH₂)₂NMe₃⁺I^–. Microporous silica with a wormhole structure containing the C₈ fluorinated chain was obtained in the presence of the nonionic surfactant. It was shown that the use of fluorinated surfactants allows the incorporation of an amount of (fluorinated) chains located in the channel pores that is superior to that obtained by using a hydrogenated surfactant. The cationic surfactant used under acidic conditions allowed the incorporation of only a low amount of the C₈ fluorinated chain, leading to a poorly structured material. In contrast, a mesoporous silica containing the CF₃(CH₂)₂ group and showing a hexagonal arrangement was obtained under the same exptl. conditions.

New Journal of Chemistry published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, Formula: C10H6F17N.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Si, Nan published the artcileFerrimagnetism and reentrant behavior in a coronene-like superlattice with double-layer, Recommanded Product: Coronene, the publication is Physica A: Statistical Mechanics and Its Applications (Amsterdam, Netherlands) (2022), 126671, database is CAplus.

Phase diagrams and temperature dependences of magnetizations in a coronene-like lattice have been studied based on the effective-field theory with correlations. For the spin-3/2 and 2 atoms in the superlattice with double-layer Ising model, both the transverse field and anisotropy are included. Novel features, such as the possibility of compensation and reentrant behaviors, are found for the ferrimagnetic properties in such systems.

Physica A: Statistical Mechanics and Its Applications (Amsterdam, Netherlands) published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C11H22N2O4, Recommanded Product: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lu, Dong published the artcileCu-Catalyzed Dual C-O Bonds Cleavage of Cyclic Ethers with Carboxylic Acids, NaI, and TMSCF₃ to Give Iodoalkyl Ester, Computed Properties of 118-90-1, the publication is Organic Letters (2022), 24(15), 2826-2831, database is CAplus and MEDLINE.

Herein, by dual C-O bonds cleavage of cyclic ethers with Cu-catalysis led to the development of a selective three-component coupling of com. available chems., carboxylic acids, ethers, and halogens to synthesize iodoalkyl esters RC(O)OR¹ [R = Ph, 2-furyl, 4-BrC₆H₄, etc.; R¹ = (CH₂)₄-I, n-decyl, (CH₂)₅-I, etc.] in the presence of TMSCF₃ was reported. This allowed for the concise synthesis of highly functionalized iodoalkyl esters directly. And the synthetic insect pheromones were also disclosed.

Organic Letters published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Computed Properties of 118-90-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lu, Dong published the artcileCu-Catalyzed Dual C-O Bonds Cleavage of Cyclic Ethers with Carboxylic Acids, NaI, and TMSCF₃ to Give Iodoalkyl Ester, Application In Synthesis of 104-03-0, the publication is Organic Letters (2022), 24(15), 2826-2831, database is CAplus and MEDLINE.

Herein, by dual C-O bonds cleavage of cyclic ethers with Cu-catalysis led to the development of a selective three-component coupling of com. available chems., carboxylic acids, ethers, and halogens to synthesize iodoalkyl esters RC(O)OR¹ [R = Ph, 2-furyl, 4-BrC₆H₄, etc.; R¹ = (CH₂)₄-I, n-decyl, (CH₂)₅-I, etc.] in the presence of TMSCF₃ was reported. This allowed for the concise synthesis of highly functionalized iodoalkyl esters directly. And the synthetic insect pheromones were also disclosed.

Organic Letters published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C8H7NO4, Application In Synthesis of 104-03-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Huang, Wen published the artcileAggregation behavior of dodecylammonium carboxylates in carbon tetrachloride, HPLC of Formula: 2016-56-0, the publication is Huaxue Xuebao (1996), 54(10), 943-948, database is CAplus.

The aggregation of dodecylammonium acetate (DAA), dodecylammonium propionate (DAP) and dodecylammonium butyrate (DAB) were studied by an iodine spectrometric method and by H₂O solubilization. The (cmc)_I determined by the I method are 2.0 ¡Á 10^-4, 2.2 ¡Á 10^-4, and 4.3 ¡Á 10^-4 M, resp.; the (cmc)_W determined by H₂O solubilization are 2.0 ¡Á 10^-3, 3.5 ¡Á 10^-3, and 10.5 ¡Á 10^-3 M, resp. The (cmc)_I are lower by 1 order of magnitude than the corresponding (cmc)_W. The reason is probably that aggregates with low aggregation number which begin to form at (cmc)_I cannot solubilize H₂O. The H₂O solubilization starts only when the aggregation number of reverse micelles is high enough, which occurs at (cmc)_W (a concentration much higher than (cmc)_I). These experiments show that reverse micelles of DAA, DAP, and DAB are able to solubilize ¡Ü 4.3, ¡Ü 9.4, and ¡Ü 13.5 mols. of H₂O per surfactant mol., resp. According to a simplified spherical reverse micelle model, the aggregation numbers of the DAA, DAP, and DAB reverse micelles which solubilize the limiting amount of H₂O are 24, 122, and 252; the radii of the H₂O pools are 0.90, 2.02, and 2.90 nm, and the radii of the free H₂O pools are 0.33, 1.68 and 2.58 nm, resp.

Huaxue Xuebao published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, HPLC of Formula: 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Qian, Jiangang published the artcileEffects of adsorption and surface micellization of dodecylammonium acetate on the stability of silica suspension, Safety of Dodecylamineacetate, the publication is Wuli Huaxue Xuebao (1996), 12(8), 698-703, database is CAplus.

The adsorption of dodecylammonium acetate (DAA) on CAB-O-SIL was investigated; the adsorption isotherm of DAA shows two plateaus (i.e. LS-type). The addition of sodium chloride increases the adsorption of DAA, but no significant change can be found in the first plateau at low concentrations, while the addition of hydrochloric acid decreases the adsorption of DAA in the exptl. concentration region. The stability of CAB-O-SIL suspension was determined for the corresponding solutions Based on the two-step model of the surfactant adsorption theory proposed previously, and with the aid of conductivity measurements, the coagulation regularity of CAB-O-SIL suspension can be explained satisfactorily.

Wuli Huaxue Xuebao published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Safety of Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xu, Liang published the artcile{2-[2-(Carboxymethoxy)phenoxy]acetato}[2,2′-(o-phenylenedioxy)diacetic acid]sodium 4,4′-bipyridine hemisolvate monohydrate, Computed Properties of 5411-14-3, the publication is Acta Crystallographica, Section E: Structure Reports Online (2010), 66(8), m867, database is CAplus and MEDLINE.

In the title compound, [Na(C₁₀H₉O₆)(C₁₀H₁₀O₆)]¡¤0.5C₁₀H₈N₂¡¤H₂O, the Na atom is eight-coordinated in an distorted dicapped-octahedral geometry by eight O atoms from a 2-(2-carboxymethoxyphenoxy)acetate (o-BDOAH) anion and a 2,2′-(o-phenylenedioxy)diacetic acid (o-BDOAH₂) mol. The uncoordinated 4,4′-bipyridine mol. is arranged around an inversion center and exhibits rotational disorder. A three-dimensional supramol. network is built up in the crystal through O-H…O and O-H…N hydrogen bonds between the uncoordinated water mol., the uncoordinated 4,4′-bipyridine mol. and the sodium complex mol. Crystallog. data are given.

Acta Crystallographica, Section E: Structure Reports Online published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C8H10O2, Computed Properties of 5411-14-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xue, Yulan published the artcileRecovery of gallium from neutralization precipitates by flotation, Related Products of catalysis-chemistry, the publication is Shigen to Sozai (1989), 105(12), 945-9, database is CAplus.

Ga(OH)₃, which was conventionally obtained as a residue of Zn hydrometallurgy, floated completely in water with a collector of Na dodecylsulfate (SDS) at pH 4-7.0 and did not float entirely with a dodecylammonium acetate (DAA) collector in the same conditions, while Ga(OH)₃ in an aqueous solution saturated with gypsum floated to some extent with either of the collectors. Because gypsum was quite floatable in these conditions, some depressants for the selective flotation of Ga(OH)₃ from gypsum were used and soluble starch and gum arabic were effective as a depressant for Ga(OH)₃ in DAA flotation. When DAA was used as a collector and soluble starch or gum arabic was added as a depressant, Ga(OH)₃ was effectively separated from gypsum and 91% of Ga(OH)₃ was kept in the tailing.

Shigen to Sozai published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C7H7BF2O3, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia