Results 231 to 240 of about 21,034 (299)

Ultrasound-Assisted Polymerization of Dyes with Phenylenediamines: Facile Method To Design Polymeric Photosensitizers with Enhanced Singlet Oxygen Generation Characteristics and Anticancer Activity

Industrial & Engineering Chemistry Research, 2019
The present work reports for the first time ultrasound-assisted polymerization of Alizarin Red (AR), Amido Black 10B (AB-10B), 1,4-Benzoquinone (BQ) with ortho and para-phenylenediamines.
Neetika Singh, Prabhat Kumar, Raj Kumar, U. Riaz   +3 more
semanticscholar   +1 more source

Sensitization to p-Phenylenediamine

Archives of Dermatology, 1965
p-Phenylenediamine (PPD) from 0.2 mg to 1.6 mg in water or in petrolatum was applied as a patch test to 501 patients with different dermatoses, asthma, hay fever, and venereal diseases. Of these patients 10.6% reacted within the first five days indicating previous hypersensitivity and 14.4% between the sixth and the 16th day indicating the initiation ...
openaire   +3 more sources

Aniline-phenylenediamine copolymers

Synthetic Metals, 1999
The electrical conductivity of materials based on polyaniline can be controlled on submolecular level by the copolymerization of aniline with various phenylenediamines. The joint chemical oxidation of aniline with phenylenediamines yields products with the dc conductivity spanning over more than eleven orders of magnitude.
J. Prokeš, J. Stejskal, I. Křivka, E. Tobolková   +3 more
openaire   +1 more source

Sulfur-Promoted Access to 3-Arylquinoxalin-2-ones by Oxidative Coupling of o-Phenylenediamines with Arylacetates.

Organic Letters
We disclose the synthesis of 3-arylquinoxalin-2-ones from o-phenylenediamines and readily available arylacetates. The method harnesses the selective oxidative property of elemental sulfur in the presence of amine base catalyst and DMSO. The reactions are
L. A. Nguyen, Thi Yen Tran, Q. Ngo, D. Mac, Pascal Retailleau, Thanh Binh Nguyen   +5 more
semanticscholar   +1 more source

Electrochemical Oxidative (4 + 2) Cyclization of Anilines and o-Phenylenediamines for the Synthesis of Phenazines.

Organic Letters
Phenazines, crucial constituents of nitrogen-containing heterocycles, widely exist in functional compounds. Herein, we report an anodic oxidative (4 + 2) cyclization between anilines and o-phenylenediamines for the uniform construction of phenazines in a
Peng-Fei Huang, Jiangchen Fu, Ying Peng, Ke-Wen Tang, Yu Liu   +4 more
semanticscholar   +1 more source

p-Phenylenediamine sensitization and occupation

Contact Dermatitis, 2010
p-Phenylenediamine (PPD) is an extreme delayed-type skin sensitizer, and is relevant in both occupational and non-occupational exposures.To estimate the prevalence of PPD sensitization in a population of consecutive patients with suspected allergic contact dermatitis who attended units of dermatology or occupational medicine in north-eastern Italy and ...
MALVESTIO, ANDREA, BOVENZI, MASSIMO, Hoteit M, Belloni Fortina A, Peserico A, Teresa Corradin M, LARESE FILON, FRANCESCA   +6 more
openaire   +3 more sources

Coordinating ability of phenylenediamines

Coordination Chemistry Reviews, 1999
Abstract The coordinating ability of aromatic diamines is conditioned both by the low basicity of the nitrogen atoms and their situation in ortho, meta or para positions on the aromatic ring. Important aspects of the aromatic diamines taking into account their possible applications are: processes based on electron transfer forming Wurster type ...
Alfredo Mederos, Sixto Domı́nguez, Rita Hernández-Molina, Joaquı́n Sanchiz, Felipe Brito   +4 more
openaire   +1 more source

Spectrophotometric determination ofm-phenylenediamine

Mikrochimica Acta, 1969
A mixture of chloranil and cupric chloride-triphenylphosphine complex in acetone gives pinkish red color withm-phenylenediamine which provides the basis of a new spectrophotometric method for the determination ofm-phenylenediamine in minute quantities,o- andp-phenylene-diamines do not interfere with the determination if their amount does not exceed 90 ...
M. H. Hashmi, A. I. Ajmal, A. S. Adil
openaire   +1 more source

m-Phenylenediamine and m-Phenylenediamine Sulfate

International Journal of Toxicology, 2017
openaire   +2 more sources

Cu@U-g-C3N4 Catalyzed Cyclization of o-Phenylenediamines for the Synthesis of Benzimidazoles by Using CO2 and Dimethylamine Borane as a Hydrogen Source

Catalysis Letters, 2018
Vishal V. Phatake, B. Bhanage
semanticscholar   +1 more source