The acidic dissociation constant and the solubility of 4-amino-4'-chlorodiphenyl have been determined. The solubility of the amine sulphate has been redetermined and found to be ten times greater than reported earlier. The reason for the discrepancy is revealed, and the use of the amine as ...

Electrochemical and spectroscopic (EPR, UV–Vis, IR) studies of the aromatic secondary amines N,N′-diphenyl-1,4-phenylenediamine (DPPD), N-phenyl-N′-isopropyl-p-phenylene diamine (IPPD), N-phenyl-N′-(α-methylbenzyl)-p-phenylenediamine (SPPD) and N-phenyl-N′-(1,3-dimethyl-butyl)-p-phenylened...

Ti6Al4V alloy is the most commonly used in orthopedic industry as an endoprosthesis. Ti6Al4V exhibits good mechanical properties, except the abrasion resistance. Surface modification of Ti6Al4V in order to obtain organic layer, and then the attachment of the polymer, can allow for overcoming thi...

We report molecular simulation, at the atomistic level, of crystalline 4,4′-diphenylmethane diisocyanate (MDI) with n-butanediol (BDO) as chain extender, henceforth denoted as MDI/BDO, which is one of the most important components of thermoplastic polyurethanes. This work studies the structure ...

The quantitative analysis of two secondary aromatic amine antioxidants, phenyl-1-naphthylamine (PANA) and 4,4′-dioctyldiphenylamine (DODPA), by gas chromatography (GC) with a thermionic specific detector is described. Isolation of the oxidized products of these amines in an oxidized lubricant b...

A highly selective and simple flow injection method is reported for the determination of Au(III) in jewel samples. The method is based on the catalytic effect of Au(III) on the oxidation of 4-amino-4′-methoxydiphenylamine hydrochloride (Variamine Blue B base, VB) by KIO3. The colored reaction p...

Screen-printed electrodes (SPEs) modified with Variamine blue (VB), covalently attached to the oxidized single-walled carbon nanotubes (SWCNTs-COOH), were developed and used as chemical sensors for the detection of the reduced nicotinamide adenine dinucleotide (NADH). The Variamine blue redox me...

The effect of Variamine Blue B (4-Amino-4′-Methoxydiphenylamine-Diazonium Chloride, VBB) on the corrosion of Cu–35Zn alloy (brass) in 3.5% NaCl medium was studied at different concentrations and temperatures. For this purpose, electrochemical impedance spectroscopy (EIS) and potentiodynamic po...

Novel solution-processable polybenzimidazoles P1–P3 were prepared from three new teteraamines and 4,4′-oxybis(benzoic acid) in Eaton's reagent at 145 °C. These tetraamines were 4,4′,5,5′-tetraaminodiphenyldiphenyl ether containing bromide, phenyl and trifluoromethyl-substituted phenyl ...

A new class of highly fluorinated aromatic poly(ether-amide)s was prepared through triphenyl phosphite-activated polycondensation of 2,2′-bis(3,4,5-trifluorophenyl)-4,4′-diaminodiphenyl ether (FPAPE) and four dicarboxylic acid comonomers. All the resulting polymers were thoroughly characterize...

Rapid scan cyclic voltammetry was used to investigate the mechanism of the anodic oxidation and dimerization of N, N-dimethylaniline (DMA) in acetonitrile solution. The reduction wave for the DMA.+ radical cation was observed at scan rates above 500 V s−1. Electrogenerated DMA.+ radical cations ...

Labile iron complexes (e.g., [FeIII(bpy)2]MeCN3+, [FeII(bpy)2]MeCN2+, [FeIII(H2O)6]MeCN3+, and [FeII(H2O)6]MeCN2+) in base-free acetonitrile activate dioxygen for the direct oxygenation of N,N- and N-alkylated amines to form N-dealkylated products and corresponding aldehydes. N,N-dimethylaniline...

A solution of 4,4′-dimethyldiphenyl iodonium tetrafluoroborate and N,N-dimethylaniline in acetonitrile is irradiated by UV light to give iodotoluene, toluene, 4-4′-methylenebis(N,N-dimethylaniline) crystal violet, methyl violet.

A simple and sensitive sequential injection spectrophotometric procedure is proposed for the determination of trace amounts of iodide in pharmaceutical preparations. The method is based on the catalytic effect of iodide on the (tetra base) 4,4′-methylenebis(N,N-dimethylaniline)-chloramine-T rea...

The structural stability of 4,4′-methylenedianiline (MDA), 4,4′-methylenebis(N,N-dimethylaniline) (MBDMA) and their parent diphenylmethane (DPM) was investigated by the DFT-B3LYP and ab initio MP2 calculations with the 6-311G** basis set. From the calculations the three diphenylmethanes were p...

Electropolymerization of unsubstituted magnesium porphine in acetonitrile solutions possessing various proton-accepting properties has been studied. The overall rate of the polymer-product accumulation on the electrode surface has been established to be limited by the deprotonation step of inter...

Two types of SBA-15 mesoporous silica were functionalized with different nitrogen-carbon chain lengths (long and short-chain) and then used as solid supports for immobilization of manganese(III) complex of meso-tetrakis(4-carboxyphenyl)porphine, [SBA-15-short-chain-NH2@Mn(TCPP)OAc] and [SBA-15-l...

Porphyrin based nanomaterials have attracted widespread attention due to their similarity of the key dyes of natural photosynthesis. To develop new chromophores for photoelectrochemical (PEC) devices, in this work, we synthesized 3 different aggregated nanostructures of meso-tetra(4-carboxypheny...

Corrosion inhibition of J55 steel in 3.5 wt.% NaCl solution saturated with CO2 by the three Porphines 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphine (P1), 5,10,15,20-Tetraphenyl-21H,23H-porphine (P2), 5,10,15,20-Tetrakis(4-hydroxyphenyl)-21H,23H-porphine (P3), electrochemical impedance spectroscop...

The tunable characteristics of the porphyrin molecular tectons have given rise to interest in investigating the self-assembled porphyrin nanoarchitectures for designing new materials. Nanostructures created by the self-assembly of meso-tetrakis(4-sulfonatophenyl)porphine and Co(III) meso-tetra(4...