Category: 1821-27-8

Venkatesan, Gopalakrishnan published the artcileFacile synthesis of oligo anilines as permanent hair dyes: how chemical modifications impart colour and avoid toxicity, SDS of cas: 1821-27-8, the publication is New Journal of Chemistry (2019), 43(41), 16188-16199, database is CAplus.

Many dyes for long-lasting hair coloring contain aromatic amines that undergo oxidative polymerizations, resulting in allergic contact dermatitis, with the potential to develop serious toxic effects. Among these amines, para-phenylenediamine (PPD) is a small mol. form of aniline commonly used in beauty products despite being a known allergen to humans. Hence, in this study we designed and synthesized safer PPD analogs through the synthesis of oligomeric PPD and the introduction of bulky side chains on PPD to overcome the PPD dye’s toxicity. We hypothesized that (a) an increase in the mol. size of PPD by addition of the PPD monomer unit on free amines and (b) strategic functionalizations at the ortho position of PPD with strong electron-donating bulky groups are able to maintain the hair coloring properties, and increase the resistance to binding to skin proteins and therefore decrease the chance of skin sensitization. 13 Oligomers were synthesized, with the aim to produce safer hair dyes while minimizing eventual toxicity to humans. In particular, oligomers with bulky sidechains, PPD 6 (13), PPD 7 (14) and PPD 8 (15), displayed weak-to-moderate (27.1%, 24.1% and 34.0%) sensitization potential. The results confirmed the importance of having bulky and strong electron donating O-alkyl substituents in order to decrease the reactivity of PPD analogs towards skin proteins, thus preventing the interaction with immune cells and providing safer hair dyes.

New Journal of Chemistry 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 C7H9BN2O3, SDS of cas: 1821-27-8.

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

Akram, Manjur O. published the artcileLigand-Enabled Gold-Catalyzed C(sp²)-N Cross-Coupling Reactions of Aryl Iodides with Amines, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Organic Letters (2019), 21(19), 8101-8105, database is CAplus and MEDLINE.

The first example of ancillary (P,N)-ligand-enabled gold-catalyzed C-N cross-coupling reactions of aryl iodides with amines is reported. The high generality of the reaction in de novo synthesis, late-stage modifications, and cascade processes to access functionalized indolinones and carbazoles underscores the synthetic potential of the presented strategy. Monitoring the reaction with ESI-HRMS and NMR provided strong evidence for the in situ formation of putative high valent Au(III) intermediates.

Organic Letters 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, Recommanded Product: Bis(4-nitrophenyl)amine.

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

Mousavi, Bibimaryam published the artcileCarbazole as linker for dinuclear gadolinium-based MRI contrast agents, Safety of Bis(4-nitrophenyl)amine, the publication is European Journal of Inorganic Chemistry (2017), 2017(45), 5403-5412, database is CAplus.

Ligands able to complex two gadolinium ions have been synthesized and characterized in view of the ability of the complexes to increase the spin relaxation of water protons. All ligands are based on the heptadentate diethylenetriaminetetraacetic acid (DTTA) chelator and carbazole as a rigid linker. Depending on the derivatization on the nitrogen atom of the five-membered ring, the compounds form small aggregates in aqueous solution, self-assemble to form micelles or bind to human serum albumin. In all cases, this leads to a marked increase in ¹H relaxivity at nuclear Larmor frequencies between 20 and 60 MHz. Water exchange on the gadolinium ions as measured by ¹⁷O NMR relaxation is fast enough not to limit relaxivity. ¹H nuclear magnetic relaxation dispersion profiles were also measured and analyzed using Solomon-Bloembergen-Morgan theory including Lipari-Szabo treatment to include internal motion or anisotropic rotation.

European Journal of Inorganic Chemistry 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, Safety of Bis(4-nitrophenyl)amine.

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

Hu, Xiaoguang published the artcileNitrogen-coupled blatter diradicals: the fused versus unfused bridges, Product Details of C12H9N3O4, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2019), 7(34), 10460-10464, database is CAplus.

We report the synthesis and characterization of nitrogen-coupled diradicals NDR (unfused) and CDR (fused). NDR has a large diradical character y of 0.89, and a small singlet-triplet energy gap ¦¤E_S-T of -1.16 kcal mol^-1 with the observation of a forbidden transition signal (¦¤m_s = ¡À2). Moreover, NDR shows very high stability. In contrast, the fused CDR has a smaller y (0.68), along with a larger ¦¤E_S-T (-2.38 kcal mol^-1).

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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, Product Details of C12H9N3O4.

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

Astolfi, Paola published the artcileReactions of nitrosoarenes with nitrogen monoxide (nitric oxide) and nitrogen dioxide: formation of diaryl nitroxides, COA of Formula: C12H9N3O4, the publication is European Journal of Organic Chemistry (2008), 3279-3285, database is CAplus.

Nitrosoarenes react. with nitrogen monoxide (nitric oxide) at room temperature and in aprotic media to afford the corresponding diaryl nitroxides by the intermediate formation of N-nitrosoaryl nitroxides. However, these latter spin adducts, in contrast with literature reports, have never been detected by us. N-nitrosophenyl nitroxide is obtained only in the oxidation of the ammonium salt of N-nitrosophenylhydroxylamine (cupferron) with trace amounts of lead tetraacetate. However, it evolves with time to di-Ph nitroxide, as demonstrated by following the reaction course in the ESR cavity. On a macroscale level, the reaction between nitrosobenzene and nitric oxide gives N-nitrosodiphenylamine, 4-nitro-N-nitrosodiphenylamine, 4-nitrodiphenylamine and 4,4′-dinitrodiphenylamine, in addition to di-Ph nitroxide. Diaryl nitroxides are also obtained when nitrosoarenes react with small amounts of nitrogen dioxide; the mechanism of this reaction is proposed and discussed. The structure of 4-nitro-N-nitrosodiphenylamine was determined by x-ray anal.

European Journal of Organic Chemistry 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, COA of Formula: C12H9N3O4.

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

Bozzi, Anna published the artcilePhotodecomposition of substituted 4-diethylaminoazobenzenes under visible light irradiation in different solvents, Quality Control of 1821-27-8, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2002), 152(1-3), 193-197, database is CAplus.

The visible light-induced decomposition of two series of 4-diethylaminoazobenzenes has been studied in solvents of different polarity, in the presence and absence of O₂, in order to clarify the reaction mechanism. Two different paths have been recognized, whose importance depends on the nature of the solvent; both involve the formation of organic free radicals. Decomposition is much faster in acetone than in the other solvents. A strong inhibiting effect of mol. oxygen has been observed in all cases.

Journal of Photochemistry and Photobiology, A: Chemistry 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

Puodziukynaite, E. published the artcileAniline-based bis(enamines) as new amorphous molecular charge transport materials, Quality Control of 1821-27-8, the publication is Synthetic Metals (2007), 157(18-20), 696-701, database is CAplus.

New aniline-based bis(enamines) were synthesized. The full characterization of their structure is presented. The thermal, optical and photoelec. properties of the newly synthesized enamines are discussed. The reported compounds constitute materials with high thermal stability with 5% weight loss temperatures exceeding 390¡ã as characterized by TGA. They form glasses with the glass transition temperatures ranging from 135 to 154¡ã as established by DSC. Photoelec. properties of the materials were examined by electron photoemission and time of flight technique. The electron photoemission spectra of the layers revealed the ionization potentials of 5.12-5.70 eV. Room temperature hole drift mobility of one newly synthesized derivative molecularly doped in bisphenol Z polycarbonate reached 10^-5 cm² V^-1 s^-1 at high elec. fields.

Synthetic Metals 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

Lopez-Lopez, Maria published the artcileDiphenylamine and derivatives as predictors of gunpowder age by means of HPLC and statistical models, Formula: C12H9N3O4, the publication is Talanta (2013), 214-220, database is CAplus and MEDLINE.

The gunpowder age is information of great importance that could help to establish safety regulations related to the propellants use and manipulation. In this work, a forced aging treatment (65¡ã for 120 days) was applied to four gunpowders stabilized with diphenylamine (DPA). The evolution of DPA and derivatives (N-nitroso-DPA, 2-nitro-DPA, 4-nitro-DPA, and 4-4′-dinitro-DPA) concentration during the days was leaded by high performance liquid chromatog. (HPLC). The variation with time of the peak areas of these compounds was used to construct different statistical models that could predict the gunpowders age. These models were validated using nitrocellulose-based gunpowders of known manufacture date. Models that best predicted the gunpowder age provided prediction errors lower than 6, 4, and 2 years for single-base gunpowders with dinitrotoluene (¡Ý 10% (m/m)), single-base gunpowders and double-base gunpowders, resp.

Talanta 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

Winget, Paul published the artcileGround-State Electronic Structure in Charge-Transfer Complexes Based on Carbazole and Diarylamine Donors, Category: catalysis-chemistry, the publication is Journal of Physical Chemistry C (2011), 115(21), 10823-10835, database is CAplus.

The geometries, binding energies, and amounts of charge transferred in the ground state for a series of donor/acceptor organic ¦Ð-¦Ð complexes have been characterized at the d. functional theory level. We find that these compounds exhibit important changes in geometry upon complexation that is accompanied by a large binding energy. The amount of charge transferred from the donor to the acceptor depends highly on the substitution of the donor and can be roughly described by the electron donating or withdrawing ability of the substituent. Interestingly, there is a significant difference in the behavior of carbazoles and diarylamines upon substitution.

Journal of Physical Chemistry C 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 C9H9F5Si, Category: catalysis-chemistry.

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

Amangasieva, G. A. published the artcileSynthesis of Amides by Nucleophilic Substitution of Hydrogen in 3-Nitropyridine, Related Products of catalysis-chemistry, the publication is Russian Journal of Organic Chemistry (2018), 54(6), 867-872, database is CAplus.

3-Nitropyridine reacted with nitrogen-centered carboxylic acid amide anions in anhydrous DMSO in the presence of K₃Fe(CN)₆ via oxidative nucleophilic substitution of hydrogen to give previously unknown N-(5-nitropyridin-2-yl)carboxamides. The reaction of nitrobenzene with urea anion in DMSO enabled one-pot synthesis of bis(4-nitrophenyl)amine.

Russian Journal of Organic Chemistry 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, Related Products of catalysis-chemistry.

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