A highly efficient method for removal of p-nitrophenol and its conversion p-aminophenol from water was proposed using a novel catalyst–adsorbent composite of gold nanoparticles supported on functionalized mesoporous carbon ([email protected]). The immobilized gold nanoparticles presented excell...

An intimately bifunctional catalyst composed of Pt nanoparticles encapsulated in crystals of HZSM-5 zeolite has been studied for one-pot hydrogenation of nitrobenzene (NB) to p-aminophenol (PAP) without the use of inorganic acid. The cooperation between the Pt-encapsulated nanoparticles and surr...

Currently, modified Fe3O4 magnetic nanoparticles frequently are used as nanocarriers for proteins and enzymes purification. In the present study, Fe3O4 magnetic nanoparticles were prepared, and their surfaces were modified with p-aminophenol affinity ligand immobilized by different linkers. The ...

The short term (96 h) toxicity of N-acetyl-p-aminophenol (0.58 mg/L – Treatment I and 0.29 mg/L – Treatment II) on certain health indicators (haematology, biochemical, and enzymology) of an Indian major carp Labeo rohita was studied. When compared to control, N-acetyl-p-aminophenol treated fis...

Two spectrophotometric methods are described for the rapid and accurate determination of thiols and of total glutathione in human blood. Both methods rely on the conversion of 6,6′-dithiodinicotinic acid by thiols to 6-mercaptonicotinic acid. The methods permit: (a) the specific determination o...

A simple and rapid method for the determination of nanomole levels of biological thiols is described. The analysis is based on the combination of reverse-phase high-performance liquid chromatography with a postcolumn reaction with 6,6′-dithiodinicotinic acid. Thiols, including cysteine, cysteam...

6,6′-Dithiodinicotinic acid reacts with thiols with formation of a disulfide and 6-mercaptonicotinic acid; the reaction can be followed spectrophotometrically. Homogenates of Ehrlich ascites cells react with 6,6′-dithiodinicotinic acid to an extent approximately 4-fold that of intact cells. Th...

BaO-TeO2 glasses containing 10 to 20-mol% BaO were studied by X-ray diffraction, density, thermal analysis, UV–visible and Raman spectroscopy. The effects of Eu3 +, Dy3 +, Er3 + and Nd3 + on the density, thermal, optical absorption and luminescent properties of barium tellurite glasses were stu...

A series of new Ba-based coordination polymers (CPs) were mechanochemically synthesized by milling Ba-hydroxide samples with perfluorinated and fluorine-free benzene-dicarboxylic acids, including tetrafluoroisophthalic acid (H2mBDC-F4), tetrafluorophthalic acid (H2oBDC-F4), isophthalic acid (H2m...

Ru-doped barium strontium titanate (BSTR) perovskites (Ba0.5Sr0.5Ti1-xRuxO3-δ, x = 0, 0.05, 0.1) (BSTR) were evaluated as cathode materials for the electrochemical synthesis of ammonia from wet H2 and dry N2. Phase crystallinity and the electrochemical properties of BSTR were analyzed. The BSTR...

The barium hexaferrite (BaFe12O19) containing magnetic poly(ethylene glycol dimethacrylate–vinyl pyridine), (mag-poly(EGDMA–VP)) beads (average diameter = 53–212 μm) were synthesized and characterized. Their use as an adsorbent in the removal of diethyl phthalate (DEP) from an aqueous soluti...

BaCO3, a common mineral with important applications in industry, has been synthesized in the orthorhombic phase with a high purity. As a new precursor, barium-o-phthalate complex was applied to prepare BaCO3 nanoparticles via solvent-free thermal decomposition route. Thermogravimetric analysis (...

The hydrophobic octadecyl (C18) functionalized Fe3O4 magnetic nanoparticles (Fe3O4@C18) were caged into hydrophilic barium alginate (Ba2+-ALG) polymers to obtain a novel type of solid-phase extraction (SPE) sorbents, and the sorbents were applied to the pre-concentration of polycyclic aromatic h...

Trace metals and synthetic chemicals including phthalates, bisphenol A and flame retardants, are widely used in toys and childcare products, and may pose acute or chronic adverse health effects in children. In Israel, certain chemicals are regulated in childcare products, but there are still reg...

The barium hexaferrite (BaFe12O19) containing magnetic poly (ethylene glycol dimethacrylate-vinyl pyridine; mag-poly [EGDMA–VP]) beads (average diameter = 53–212 μm) were synthesized and characterized. Their use as an adsorbent in the removal of dimethyl phthalate (DMP) from an aqueous soluti...

Interactions between triiodide (I3-) and 4-tert-butylpyridine (4TBP) as postulated in dye-sensitized solar cells (DSC) are investigated by means of 13C NMR and IR spectroscopy supported by DFT calculations. The charge transfer (CT) complex 4TBP·I2 and potential salts such as (4TBP)2I+, I3- were...

Bis(pyridine)iodonium tetrafluoroborate (IPy2BF4) was successfully used as a diiodination reagent for carbazole and its derivatives to give 3,6-diiodocarbazoles in excellent yield. Subsequent rhodium-catalyzed disilylation of 3,6-diiodocarbazoles with triethoxysilane gave the corresponding 3,6-b...

Iodine is an usual doping agent used in order to improve the conductivity of insulator polymers with either aromatic and conjugated double bonds in their structure. This paper evidences the action of the cation iodonium on the conductivity of poly(N-vinylcarbazole) (PVK) and nitrosilated-PVK (PV...

Selective direct aromatic electrophilic iodination of target phenol groups can be performed by the IPy2BF4 reagent on multiple phenol containing substrates while anchored on solid supports. The tactics make use of orthogonal protecting groups capable of inhibiting the reaction of the untargeted ...

Electrochemical grafting of aryldiazonium salts has been widely explored for functionalization of conducting surfaces with aromatic molecules. Unfortunately, heteroaromatic diazonium salts are highly unstable and decompose rapidly, precluding, in general, the use of such salts. We show here that...