Dipyrazolinyl-substituted 1,4-distyrylbenzenes

A number of dipyrazolinyl-substituted 1,4-distyryl- and 1,4-distyryl-2-methylbenzenes — new luminophores that have intense yellow-green luminescence — were obtained by the Wittig reaction by refluxing 1-(4-formylphenyl)-3-aryl-5-phenyl-2-pyrazolines and aromatic bisphosphonium salts in isopropyl alcohol in the presence of sodium isopropoxide. The low reactivities of the aldehydes used and the predominant formation of trans isomers in the Wittig reaction are noted. Data from the IR and electronic absorption spectra and the fluorescence spectra of the synthesized compounds are presented.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 532–535, April, 1979.     

Investigation of the properties of filled polyethylene by the texture pattern of macrostructure images

The results of an investigation of the structure of polymer composite materials are presented. The materials were produced with the use of the texture analysis and mathematical methods of processing of macrostructure images. The approach proposed to measure texture parameters allows one to investigate the effect of the type and concentration of the filler on the properties of the material.     

IR Microscopy as a Method for Studying the Influence of An External Electric Field on the Spin Crossover Exemplified by the Fe(II) Complex with 2,6-Bis(pyrazol-1-yl)pyridine

Russian Journal of Coordination Chemistry - The influence of the electric field on the spin state of the single crystal of [Fe(1-Bpp)2][BF4]2 demonstrating the spin crossover phenomenon is studied....     

Influence of Modification of Pentasils with Alkaline-Earth Metals on Their Acid and Catalytic Properties in Conjugate Conversion of Methanol and Propane-Butane Fraction

Acid and catalytic properties of Pentasils in conjugate conversion of methanol and propane-butane fraction, as influenced by their modification with Ca, Sr, Ba, and Mg, were studied.     

Radiationless deactivation of excited molecules of 4-aminonaphthalimides

The effects of alkylation of the 4-amino group, polarity and viscosity of a solvent, and temperature on the fluorescence ofN-(2,4-dimethylphenyl)imides of 4-amino-1,8-naphthalenedicarboxylic acid were studied. A decrease in the temperature and polarity of 4-dimethylaminonaphthalimide to decrease and have almost no effect on the rate of emissive deactivation of excited state. The abnormally low efficiency of fluorescence of 4-dimethylaminonaphthalimide in polar low-viscosity media at room temperature is associated with the formation of a nonfluorescent charge-transfer state. The increase in the rate of radiationless deactivation of 4-aminonaphthalimide in the alkylation of its amino group is associated with the increase in its electron-donor ability. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2142–2144, December, 1997.     

Parameters of free-burning arc discharge plasma in air with silver-based electrodes

We have used optical spectroscopy to study the radial temperature profiles for an electric arc plasma between silver electrodes and electrodes made from composite materials based on silver (Ag-CdO). We studied the structural changes in the working layers of the electrodes by metallography. We established that the parameters of the arc discharge plasma are determined by the condition of the electrode surface. __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 3, pp. 375–379, May–June, 2006.     

Luminescent properties of naphthalic acid derivatives used in nondestructive-testing liquids

Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 55, No. 5, pp. 820–825, November, 1991.