Month: December 2022

Lopez, S. published the artcileSpray pyrolysis deposition of tin sulfide (Sn_xS_y) thin films, Application of 1,1-Dimethylthiourea, the publication is Semiconductor Science and Technology (1994), 9(11), 2130-3, database is CAplus.

Tin sulfide (Sn_xS_y) thin films have been prepared on Pyrex glass substrates by the spray pyrolysis technique using tin chloride (SnCl₂) and N,N-dimethylthiourea (CH₃NHCSNHCH₃) as starting materials. The depositions were carried out in the range of substrate temperatures from 320 to 450¡ã. From x-ray diffraction measurements and SEM micrographs, it is found that the values of x and y, which determine the type of deposited compound, depend on the substrate temperature At lower substrate temperatures (320-360¡ã), mixed phases such as Sn₂S₃ and ¦Ã-Sn₂S₃ are present. At intermediate substrate temperatures (370-390¡ã), the SnS phase is predominant. For substrate temperatures higher than 390¡ã, the deposited material is mainly SnO₂. The optical reflectance and transmittance of SnS were used in an iterative method to obtain the refractive index (n) and the excitation coefficient (k). The values of n and k were used to calculate the absorption coefficient (k). These values of n and k were used to calculate the absorption coefficient (¦Á) and the bandgap (E_G), giving the result E_G = 1.27 eV. Measurements of the dark conductance (¦Ò) as a function of T were made and an activation energy of 0.54 eV was determined from the slope of a plot of ln ¦Ò vs. 1/T.

Semiconductor Science and Technology published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Application of 1,1-Dimethylthiourea.

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

Eren, Nimrod M. published the artcileSynthesis, Structure, and Solution Studies of Lithiated Allylic Phosphines and Phosphine Oxides, Safety of Allyldiphenylphosphine oxide, the publication is Organometallics (2020), 39(11), 2080-2090, database is CAplus.

This study reports a new series of 12 ¦Á-lithiated allylic phosphines and phosphine oxides. By incorporating Lewis base donors including di-Et ether (Et₂O), THF (THF), N,N,N’,N’,-tetramethylethylenediamine (TMEDA), and N,N,N’,N’,N”,-pentamethyldiethylenetriamine (PMDETA), nine complexes were structurally characterized by single-crystal X-ray crystallog. This includes novel dilithiated allylic phosphine 4 [PhP{CHCHCH₂Li(TMEDA)}₂] and a rare hemisolvated lithiated phosphine oxide 6 [{Ph₂P(O)CHC(Me)CH₂Li}₂(TMEDA)]. Interestingly, in the solid state, P(III) complexes take advantage of Li-¦Ð interactions to the newly formed delocalized system, in comparison to P(V) complexes where the oxophillic nature of the lithium atom dominates. All 12 complexes were fully characterized in the solution state by multinuclear NMR spectroscopy. DFT calculations on isomers of monomeric lithiated complex 3 [Ph₂PCHC(Me)CH₂Li(PMDETA)] described the low energy barrier between transition steps of the subtle delocalization of the allylic chain.

Organometallics published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, Safety of Allyldiphenylphosphine oxide.

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

Smith, Graham published the artcileStructures of the divalent metal complexes with benzene-1,2-dioxydiacetic acid, COA of Formula: C10H10O6, the publication is Polyhedron (1987), 6(5), 871-9, database is CAplus.

The divalent Ca, Mn, Zn, Co, Mg and Ni complexes of benzene-1,2-dioxydiacetic acid (BDDAH₂) were prepared and their structures were determined by x-ray diffraction. [Ca(BDDA)(H₂O)₂]_n.nH₂O and [Mn(BDDA)(H₂O)₂]_n.nH₂O are isomorphous and isostructural. There is a pentagonal bipyramidal 7-coordination about each metal, involving 4 oxygens of the BDDA ligand, 2 axial waters and a 5th bridging carboxyl O giving a polymer structure. In contrast, [Zn(BDDA)(H₂O)₃].3.5H₂O (and the Co and Mg isomorphs) is discretely monomeric with the bridging position of the Ca/Mn structure replaced by a water. [Ni(BDDAH)₂(H₂O)₄].H₂O is monomeric and 6-coordinate, bonded through only 1 carboxyl group of each of 2 trans-related BDDAH ligands.

Polyhedron 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 C6H5NO, COA of Formula: C10H10O6.

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

Acik, Eda published the artcileRheological properties of poly(lactic acid) based nanocomposites: Effects of different organoclay modifiers and compatibilizers, Quality Control of 28056-87-3, the publication is Journal of Applied Polymer Science (2016), 133(4), n/a, database is CAplus.

Poly(lactic acid) (PLA) nanocomposites containing five types of organically modified, layered silicates and two elastomeric compatibilizers, namely ethylene-glycidyl methacrylate copolymer (E-GMA) and ethylene-Bu acrylate-maleic anhydride copolymer (E-BA-MAH), were prepared using a twin screw extruder. The morphologies of the nanocomposites were determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM), and the rheol. properties of the melts were measured using small-amplitude oscillatory shear. XRD revealed that the addition of E-GMA to the binary nanocomposites resulted in higher compatibility between the organoclay nanoplatelets and the polymer matrix. TEM showed that all of the nanocomposites contained mixed dispersed structures, involving tactoids of various sizes, as well as intercalated and exfoliated organoclay layers. Rheol. properties were found to be affected by the differences in the compatibility between the organoclays and the polymer matrix, and by the addition of the compatibilizer. Organoclay types that resulted in high level of dispersion exhibited higher values of complex viscosity compared to that of neat PLA. The addition of E-GMA introduced a solid-like rheol. behavior at low frequencies. All of the nanocomposites had similar rheol. behavior at high frequencies. ? 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42915.

Journal of Applied Polymer Science 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, Quality Control of 28056-87-3.

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

Yabuuchi, Tetsuya published the artcileApplication of phenylglycine methyl ester (PGME) to determination of the absolute configuration of carboxylic acids having phenylalkyl group, COA of Formula: C11H14O2, the publication is Chirality (1997), 9(5/6), 550-555, database is CAplus.

(S)-phenylglycine Me ester [(S)-PGME] was applied to elucidate the absolute configuration of a series of aliphatic carboxylic acids Ph(CH₂)_nCHRCO₂H (I; n = 1-6; R = Me, Et) which possess a Ph group on the chain, by the process similar to the modified Mosher’s method. (S)-PGME was condensed with rac-I, and the resulting diastereomeric pair was separated ¦¤¦Ä Values were calculated from the ¹H-NMR chem. shifts of the diastereomeric PGME amides. By analyzing the pos. and neg. distribution patterns for each compound, it was concluded that this new method was successful to predict the absolute configuration of such type of acids, and that no significant interaction between the two Ph groups, one in the chain and the other in the PGME, was present.

Chirality published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C15H10O2, COA of Formula: C11H14O2.

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

Takahashi, Yasuo published the artcileConcentrations of surfactant-derived impure and degradation compounds in river waters and water supplies, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Kankyo Kagaku (2004), 14(4), 845-853, database is CAplus.

The concentrations of surfactant-derived impure and degradation compounds in water samples from the TE river differ among water sampling station. The concentration was about 0.01-0.20 ¦Ìg/L for alkylbenzene, from under quantification limit to ?0.010 ¦Ìg/L for 4-t-butylphenol, about 0.005-0.050 ¦Ìg/L for 4-t-octylphenol, from under quantification limit to ?0.50 ¦Ìg/L for nonylphenol, from under quantification limit to ?0.10 ¦Ìg/L for nonylphenol monoethoxylate, from under quantification limit to ?0.02 ¦Ìg/L for 4-t-butylphenoxy acetic acid, and 0.02-0.07 ¦Ìg/L for 4-t-octylphenoxy acetic acid; chlorides and n-type alkylphenols were not detected. In the TE river water, the anion surfactant concentration was estimated to be higher ?2000 times than alkylbenzene concentration, and the nonionic surfactant concentration to be higher ?200 times than the total concentration of nonylphenol and 4-t-octylphenol. No impure and degradation compounds derived from surfactants were detected in the water supplies. This is because these compounds react with Cl, forming byproducts.

Kankyo Kagaku published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C38H74Cl2N2O4, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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

Nishida, Masakazu published the artcileReactions of alicyclic perfluoroimines with trimethyl(pentafluorophenyl)silane, Name: Trimethyl(perfluorophenyl)silane, the publication is Nippon Kagaku Kaishi (2000), 817-820, database is CAplus.

The title substitution reactions were achieved in the presence of a fluoride anion: the reaction of perfluoro-(5,6-dihydro-2H-1,4-oxazine) (I) with an equal amount of tri-Me(pentafluorophenyl) silane (II) provided not only a monosubstituted compound, i.e. perfluoro-(3-phenyl-5,6-dihydro-2H-1,4-oxazine), but also di- and trisubstituted compounds, i.e. perfluoro-(5,5-diphenyl-phenyl-5,6-dihydro-2H-1,4-oxazine) and perfluoro-(3,5,5-triphenyl-5,6-dihydro-2H-1,4-oxazine), while the reaction of I with three molar excess of II only gave trisubstituted compounds A significant heterocyclic ring effect was observed: the reaction of perfluoro-(3,4-dihydro-2H-pyrrole) (III) with II mainly gave a dimer of III, i.e. perfluoro-(5-pyrrolidino-3,4-dihydro-2H-pyrrole), with a trace amount of a monosubstituted compound, i.e. perfluoro-(5-phenyl-3,4-dihydro-2H-pyrrole).

Nippon Kagaku Kaishi published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Name: Trimethyl(perfluorophenyl)silane.

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

Takeda, Shuichi published the artcileMetabolic fate of triethylenetetramine dihydrochloride (trientine hydrochloride, TJA-250) 2. Metabolism study in rats using ¹⁴C-TJA-250, SDS of cas: 38260-01-4, the publication is Oyo Yakuri (1995), 49(2), 173-8, database is CAplus.

The metabolites of triethylenetetramine dihydrochloride (TJA-250) in urine, feces, liver, kidney, and plasma were studied in rats after i.v. or oral administration of ¹⁴C-TJA-250. By both administration routes, the metabolite M-1, which is 1-acetamido-8-amino-3,6-di-azaoctane (acetylated metabolite), was isolated from urine, liver, kidney and plasma. No metabolites were found in feces after oral administration. This observation is supported by the finding that ¹⁴C-TJA-250 was not decomposed in the intestinal microflora in vitro. When ¹⁴C-TJA-250 was incubated at 37 ¡ãC with the whole homogenates of liver, kidney and small intestine, some metabolites including M-1 were generated by small intestine. M-1 was also produced by the S-9 mixture of liver and kidney plus acetyl CoA. These results suggested that TJA-250 is excreted mainly in urine after biotransformation including acetyl conjugation.

Oyo Yakuri published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C14H26O2, SDS of cas: 38260-01-4.

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

Takeda, Shuichi published the artcileMetabolic fate of triethylenetetramine dihydrochloride (trientine hydrochloride, TJA-250) 3. Bioavailability of TJA-250 in rats after single administration, Application of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Oyo Yakuri (1995), 49(2), 179-86, database is CAplus.

A study was made with respect to the bioavailability of TJA-250 (triethylenetetramine dihydrochloride) in rats after single i.v. and oral administration. The plasma concentration was determined by HPLC with fluorescence detection; TJA-250 was labeled with fluorescamine before injection. The plasma concentration of TJA-250 rapidly fell with a half life of 0.54 and 0.65 h after i.v. administration at doses of 5 and 25 mg/kg, resp. In rats in a fasting state and those not in a fasting state, oral administration of 25 mg/kg of TJA-250 produced maximal plasma concentrations of 0.5 h, after which the plasma concentrations fell with a half life of 0.97 and of 1.57 h, resp. The bioavailability was 25.5% in rats in a fasting state and 14.0% in rats not in a fasting state. After intraduodenal administration of the same dose, the AUC was larger than that after oral administration. The effects of various factors, e.g. metal ions, laboratory chow and concentration of TJA-250 in a dosage solution on the absorption of TJA-250 from gut were studied by the in situ loop technique in rats. The absorption was affected by the concentration of dosage solution in a concentration-dependent manner. Liver perfusion study showed a poor metabolism of TJA-250. These results indicate that the concentration of dosage solution and first pass metabolism in intestinal wall may play an important role in the absorption of TJA-250 in humans as well as in rats.

Oyo Yakuri published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C4H7BrO2, Application of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

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

Takeda, Shuichi published the artcileMetabolic fate of triethylenetetramine dihydrochloride (trientine hydrochloride, TJA-250) 1. Absorption, distribution and excretion in rats after single administration of ¹⁴C-TJA-250, Category: catalysis-chemistry, the publication is Oyo Yakuri (1995), 49(2), 163-71, database is CAplus.

The absorption, distribution and excretion of radioactivity were investigated in rats after single i.v. or oral administration of ¹⁴C-TJA-250 (triethylenetetramine dihydrochloride). Oral administration of ¹⁴C-TJA-250 at a dose of 25 mg/kg produced a maximal plasma concentration (C_max) at 1 h, after which the plasma level fell with half lives of 1.69 and 30.35 h. When the same dose was given i.v., the radioactivity rose to the maximum level at 30 min after administration and then the level fell with a half life of 1.27 h up to 6 h. The AUC (area under the curve) values after i.v. and oral administration were 74.67 and 33.05 ¦Ìg eq. * hr/mL, resp. and the extent of absorption after oral dose was 44.3%. The C_max and AUC obtained from rats not in a fasting state corresponded to 73.9 and 86.2%, resp., of the values in rats in a fasting state. There was a dose-dependent increase in C_max and AUC after oral administration of 10 to 62.5 mg/kg. Sex difference was observed in plasma radioactivity concentration Within 168 h after single intraveonus and oral administration, 95.40 and 39.80%, resp., of dose was excreted into urine; 3.26 and 58.34%, resp., into feces; and 0.62 and 0.69%, resp., into expired air. Biliary excretion was only 0.86% of dose within 48 h and 1 h after oral administration. High radioactivity was found mainly in kidney and liver. No definite accumulation of radioactivity occurred in any tissues 168 h after administration. The distribution of radioactivity after i.v. administration was similar to that after oral dosing.

Oyo Yakuri published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C10H10N2, Category: catalysis-chemistry.

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