CuxFey/SiO2 catalysts were prepared using urea-assisted sol−gel method. The structure and physicochemical properties of the catalysts were characterized using N2 adsorption–desorption, transmission electron microscopy, H2-temperature-programmed reduction, powder X-ray diffraction, and X-ray pho...

Cu/SiO2 catalysts prepared by the ammonia evaporation method were applied to hydrogenation of diethyl malonate to 1,3-propanediol. The calcination temperature played an important role in the structural evolution and catalytic performance of the Cu/SiO2 catalysts, which were systematically charac...

Sodium acetate-catalyzed multicomponent assembling of salicylaldehydes, malononitrile and cyanoacetates in water–alcohol mixture (1: 1) at ambient temperature affords alkyl (2-amino-3-cyano-4H-chromen-4-yl)cyanoacetates in 88–95% yields.

A new perylenebisimide–tetraphenylethene dyad (1) linked by imidazolium/amide anion binding sites at the imide position of the PBI core, has been designed and characterized. The recognition ability of 1 toward anions has been investigated in detail by UV–vis and emission spectroscopy. In CH3CN...

The title compounds, conveniently abbreviated Eu(DMH)3·o-phen and Eu(DMH)3·dipy, have been prepared and characterized by means of their luminescence spectra and by complete structure determination by X-ray diffraction. The spectral results indicated the existence of two europium sites in the d...

In several vertebrate species, the soluble enzyme, O-phosphorylethanolamine (O-PE) phospho-lyase (EC group 4.2) was found to be located primarily in the soluble fraction of the liver. Ezymatic activity in rat liver was increased by feeding a high protein diet and a distinct diurnal variation in ...

O-phosphorylethanolamine ammonia lyase, a new enzyme present in vertebrate liver, has been shown to catalyze the catabolism of O-phosphorylethanolamine to equimolar quantities of ammonia, acetaldehyde, and inorganic phosphate. The enzyme occurs in the soluble fraction of the cell and has been pa...

The synthesis and characterization of 1-O-hexadecyl-and 1-O-octadecyl-3-O-phosphorylethanolamine-2-propanone are described. Ketal derivatives of these compounds were isolated and purified by column chromatography on silica gel in an overall yield of 21 and 27%. The availability of these new keto...

A simple and selective colorimetric sensor based on o-phosphorylethanolamine-functionalized gold nanoparticles (OPA–Au NPs) as an optical probe has been developed for the detection of UO22+. OPA–Au NPs rapidly aggregate in the presence of UO22+, thereby causing a visual color change from red t...

The majority of studies on non-extractable stationary phases have been done using the methylsilicones. However, there is a need for non-extractable phases containing different functional groups, such as phenyl and cyanopropyl. Tolyl groups have been incorporated into these stationary phases to f...

The compositions of commercial cyano-containing polysiloxane stationary phases were determined using infrared, nuclear magnetic resonance, and proton-induced X-ray emission spectroscopies. Varying amounts of the polar carboxamide group were found in most polymers. This group, which is inadverten...

The preparation of trimethyltin-sulfur compounds of the type Me3SnSC6H44-X, where X = F, Cl, Br, CH3, NH2, and NO2 is reported and the nature of the bonding between tin and sulfur is discussed on the basis of IR, UV, PMR, and Raman data. The mass spectrum of each compound is tabulated.

NMR parameters for bis(trimethyltin) oxide, sulphide, selenide and telluride have been measured by 1H{13C}, 1H{77Se}, 1H{119Sn}, 1H{125Te}, and 1H{117Sn} double resonance. Theories of 119Sn magnetic shielding and one-bond coupling constants are summarised and discussed in terms of the ...

Novel linear oligoheterocycles based on substituted tetrazines are described. The desired compounds have been accomplished by a variation of the original Pinner [Ann. Chem., 297 (1897) 221] synthesis in which the aromatic nitrile reacted with hydrazine in an aqueous solution to give bis(pyrrolyl...

Studies of the temperature dependence of infrared absorption and dielectric permittivity of t-Bu2CHOH in n-heptane and CCl4 solutions showed considerable changes in the association equilibria: monomers open dimers cyclic dimers.

A new fast drift technique for the measurement of short drift times for excess electrons is dielectric liquids is described. The technique was used to measure the drift velocities of excess electrons in 2,2,4,4-tetramethylpentane and tetramethylsilane as a function of the applied uniform electri...

A small test ion chamber has been constructed using 2,2,4,4 tetramethylpentane as the ionizing liquid and an array of lead plates as the high voltage and ground planes. Signals resulting from ionization deposited in the ion chamber by cosmic-ray muons were monitored for possible degradation from...

The ion yield of 2,2,4,4 tetramethylpentane has been measured for electric fields between 600 V/cm and 3600 V/cm using 400 MeV/c protons and 150 MeV/c pions from the TRIUMF accelerator. In this measurement particle trajectories are selected to be parallel to the electric field of the ion chamber...

We report an ion chamber measurement of the electron mobility and free ion yield of liquid 2,2,4,4 tetramethylpentane for single minimum ionizing particles. A waveform analysis technique was used to measure clearly systematic effects due to amplifier shaping and electron trapping contaminants. A...

The electron drift mobility μ and zero field free ion yield G0ft have been measured for liquid 2,2,4,4-tetramethylpentane using a waveform analysis. The saturation of the ion yield for highly ionizing radiation has also been investigated and parameterized using the Birks' equation. The res...