Catalysis-chemistry

Peters, Arnold T. published the artcileRelations between the structure and light fastness of nitrodiphenylamine dyes, Quality Control of 1821-27-8, the publication is Industrie Chimique Belge (1967), 32(Spec. No.), 103-5, database is CAplus.

The effect on light fastness of the position of the NO2 group in nitrodiphenylamine dyes was studied. The p-quinonoid structure given by 4-nitro derivatives is degraded more readily than the internally H-bonded ¦Ï-quinonoid structure. Fade figures (1% change in amount of visible light absorbed after exposure) for dyeings on secondary cellulose acetate were as follows (NO2 group position(s) and fade figure given): 2, 6.5; 3, 29.1; 4, 34.0; 2,2′, 2.75; 2,4′, 17.9; 2,3′, 7.16; 4,4′, 51.6; 4,3′, 32.2; 3,3′, 23.2. Dyeings on other fibers (Dicel, Tricel, nylon, Courtelle, Acrilan, and Terylene) had the same order of stability. Some relation between fading and the intensity of the uv absorption peak given by the dyes in the 380-425 m¦Ì region is demonstrated.

Industrie Chimique Belge published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Quality Control of 1821-27-8.

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

Park, Byoungnam published the artcileCarrier channeling and funneling through the C₆₀ self-assembled monolayer/zinc oxide colloidal quantum Dot/MAPbI₃ perovskite functional interfaces, HPLC of Formula: 13822-56-5, the publication is Materials Letters (2022), 131943, database is CAplus.

We demonstrated channeling and funneling of charge carriers through functional interfaces with a configuration of C₆₀ self-assembled monolayer (SAM)/zinc oxide (ZnO) colloidal quantum dots (CQDs)/Ag nanoparticles (NPs)/MAPbI₃. The combination of the localized surface plasmon-resonance (LSPR) effect and the electron accepting capability of the C₆₀ SAM enabled the funneling of carriers under illumination. Photoinduced charge transfer is facilitated by the presence of ZnO CQDs, through which the photoexcited carriers in MAPbI₃ is channeled into the C₆₀ SAM with a large diffusion length. This demonstrates that LSPR-induced charge retention at the interface is potentially applicable to photomemory devices.

Materials Letters published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, HPLC of Formula: 13822-56-5.

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

Pantel, Siegbert published the artcileCatalytic-kinetic determination of thioureas by a biamperostatic method with iodine-azide as the indicator reaction, Formula: C3H8N2S, the publication is Analytica Chimica Acta (1983), 215-22, database is CAplus.

A biamperostatic method, in which the I concentration in the I-azide reaction mixture is kept very low and constant by the automatic addition of increments of a KI₃ solution, was used to determine the catalysts thiourea, phenylthiourea, benzoylthiourea, and tetramethylthiuram sulfide in the nanomolar range in aqueous as well as in 20% ethanolic solution The catalytic activities of another 15 substituted thioureas were also measured and listed.

Analytica Chimica Acta 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, Formula: C3H8N2S.

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

Pantel, Siegbert published the artcileCatalytic-kinetic determination of substituted thioureas and thioacetamide by an absorptiostat method with bromopyrogallol red/hydrogen peroxide as the indicator reaction, Related Products of catalysis-chemistry, the publication is Analytica Chimica Acta (1984), 158(1), 85-91, database is CAplus.

In the absorptiostat method described, the concentration of the dye in the bromopyrogallol red/H₂O₂ reaction is kept very low and constant by the automatic addition of increments of bromopyrogallol red solution This is used in aqueous solutions at pH 4.0 to determine the catalyst thiourea, N-methylthiourea, N‘-allylthiourea, and thioacetamide in the 0.1-1 mmol L^-1 range with only 0.5-mL samples. The catalytic activities of another nine substituted thioureas are described; they depend on the kind of N-substituents as has been shown before for the NaN₃/I₂ reaction, but the sequence of activities for different compounds is quite different.

Analytica Chimica Acta 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, Related Products of catalysis-chemistry.

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

Panda, Biswajit published the artcileIron catalysis: rust-free future, Synthetic Route of 1293990-73-4, the publication is Chemistry & Biology Interface (2019), 9(6), 273-276, database is CAplus.

The addition of nitrogen to carbon compounds is generally a laborious process. To prevent undesired reactivity of nitrogen generally it needs protection, and sometimes removal of protecting group can be difficult, and also use of protection-deprotection strategy is contrary to the ideality of organic transformations from the point of step- and atom-economy. Legnani et al. reported a resourceful method to add simple NH₂ to alkenes from a hydroxylamine derivative directly which is highlighted herein. A simple iron-catalyzed aminochlorination of alkenes using table salts as chloride source proceeds through a radical mechanism, where it is poised for a wide variety of further functionalization options.

Chemistry & Biology Interface published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C6H12F3NO5S, Synthetic Route of 1293990-73-4.

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

Paleologos, Evangelos K. published the artcileCationic surfactant-based polyfluorate salts: Phase separation and analytical applications in the extraction and preconcentration of ionic species prior to liquid chromatography, Application of N-hexadecyltrimethylammoniumhexafluorophosphate, the publication is Journal of Chromatography A (2005), 1066(1-2), 19-25, database is CAplus and MEDLINE.

The liquid-solid phase separation originating from the formation of cationic surfactant-based polyfluorate salts (CSBPS) has been explored for extracting and preconcg. ionic species. Two cationic surfactants were tested; one with aliphatic hydrocarbon tail [Cetyltrimethylammonium bromide (CTAB)]and the other containing a heterocyclic ring [Hexadecylpyridinium bromide (HPyBr)]. Phase separation possibility was investigated with the use of hexafluorophosphates (PF₆^–) and tetrafluoroborates (BF₄^–). The effect of added acid, base and salt on the phase separation and analyte extraction was also investigated. In all cases the obtained phase diagrams consisted of two regions: a homogeneous liquid region and a solid-liquid region. Analytes of hydrophilic and hydrophobic nature such as amines, amino acids and organic chromophores were used as test compounds in both their anionic and cationic forms. The resp. recoveries ranged from over 90% for anionic species and in the proximity of 50% for cationic species, remaining below 20% for neutral species. Extracts from alk. aqueous and plasma samples spiked with tyrosine and phenylalanine were also subjected to HPLC separation with UV detection with satisfactory results. On line application was also enabled using a flow through-solid phase extraction-HPLC hyphenated apparatus, thus adding the element of automatization and increased reproducibility.

Journal of Chromatography A published new progress about 101079-29-2. 101079-29-2 belongs to catalysis-chemistry, auxiliary class Surfactants, name is N-hexadecyltrimethylammoniumhexafluorophosphate, and the molecular formula is C19H42F6NP, Application of N-hexadecyltrimethylammoniumhexafluorophosphate.

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

Okudera, Mitsuru published the artcileAn in vitro study for caries prevention using three organic fluoride agents, Product Details of C12H10F2Si, the publication is Kanagawa Shigaku (1984), 18(4), 375-93, database is CAplus.

The penetration of F^– into human dental enamel and dentin in vitro was enhanced in the presence of diphenyldifluorosilane??[312-40-3]. However, the penetration was not significantly influenced by the other 2 agents tested, tetrabutylammonium?fluoride??[429-41-4] and tetraethylammonium?fluoride??[665-46-3]. Apparently, diphenyldifluorosilane is effective in preventing dental caries.

Kanagawa Shigaku published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Product Details of C12H10F2Si.

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

Oehrle, Stuart A. published the artcileAnalysis of stabilizer degradation products in propellants using HPLC and photodiode array (PDA) detection, Synthetic Route of 1821-27-8, the publication is Propellants, Explosives, Pyrotechnics (1998), 23(1), 56-60, database is CAplus.

Anal. of stabilizer and stabilizer degradation products in nitrocellulose based propellants was done using HPLC with photodiode array (PDA) detection. Anal. was done in <12 min using an isocratic mobile phase. Using PDA detection provided the capability of monitoring at several different wavelengths as well as providing UV spectra which could be used to assess peak purity and match the spectra against known library spectra.

Propellants, Explosives, Pyrotechnics published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Synthetic Route of 1821-27-8.

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

Oehrle, Stuart A. published the artcileAnalysis of stabilizer degradation products in propellants using HPLC and photodiode array (PDA) detection, Formula: C12H9N3O4, the publication is Journal of Energetic Materials (1997), 15(1), 21-33, database is CAplus.

An anal. of stabilizer and stabilizer degradation products in nitrocellulose-based propellants was carried out by high-performance liquid chromatog. (HPLC) with photodiode array (PDA) detection. The anal. was finished in <12 min using an isocratic mobile phase. Using PDA detection provides the capability of monitoring at several different wavelengths as well as providing UV spectra which could be used to assess peak purity and match the spectra against known library spectra.

Journal of Energetic Materials published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Formula: C12H9N3O4.

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

Nielson, Arnold T. published the artcileSynthesis of 7-(N-alkylamino)- and 7-(N,N-dialkylamino)-1,3,5-triazaadamantanes, COA of Formula: C7H14N4, the publication is Journal of Heterocyclic Chemistry (1975), 12(1), 161-4, database is CAplus.

Alkylaminotriazaadamantanes (I, R1 = Et, Pr, Bu, pentyl, hexyl, Me2CHCH2, EtMeCHCHMeCH2) were prepared in 92-9% yields by reductive alkylation of I (R1 = H) with R1CHO. II were prepared in 90-100% yields by reductive methylation of I with HCHO. HCHO also reacted with I (R1 = H) to give II (R1 = Me). Reductive alkylation of I (R1 = H) with OHC(CH2)3CHO gave 26% I (NHR1 = 1-piperidyl).

Journal of Heterocyclic Chemistry published new progress about 14707-75-6. 14707-75-6 belongs to catalysis-chemistry, auxiliary class Triazinanes, name is 1,3,5-Triazaadamantan-7-amine, and the molecular formula is C7H14N4, COA of Formula: C7H14N4.

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