Tag Archives: synthesis

Octacarboxyphthalocyanines – compounds of interesting spectral, photochemical and catalytic properties

Octacarboxyphthalocyanines – compounds of interesting spectral, photochemical and catalytic properties

Please cite as: CHEMIK 2014, 68, 4, 369–376

The article presents synthesis methods of octacarboxyphthalocyanines, MPcOC. Their UV-Vis absorption spectra, their association and selected photochemical and catalytic properties are also discussed. Moreover, the article describes the impact of quaternary ammonium salts on UV-Vis spectra and CuPcOC association, fluorescence of aqueous solutions of ZnPcOC and catalytic activity of CoPcOC in homogeneous aerobic oxidation of L-cysteine.

Keywords: octacarboxyphthalocyanines, synthesis, association, UV-Vis spectra, catalysis

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Silver MPC?s Immobilized Co-initiators for Free Radical Polymerization

Silver MPC?s Immobilized Co-initiators for Free Radical Polymerization Waldemar WIŚNIEWSKI, Grzegorz NIKCZYŃSKI, Franciszek ŚCIGALSKI - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 261-266 In this report, the synthesis and the specific properties of silver nanoparticles (MPCs) immobilized by a number of mercaptoazole derivatives are described. All prepared MPCs were characterized by UV-Vis spectroscopy, FTIR spectroscopy, and TGA measurements. The synthesized nanoparticles were applied as electron donors in photoinduced free radical polymerization, in combination with xanthene dye (5,7-diiodo-3-butoxy-6-fluorene, DIBF) used as sensitizer. Photoinitiation abilities of tested compositions were studied by measuring the rate of heat evolution during polymerization in thin film cured sample. The measurements were performed by measuring photopolymerization exoterms using photo-DSC apparatus. The reaction of PEGDA polymerization coinitiating by marcaptoazoles- MPCs (MAz-MPCs) proceeds efficiently than in the presence of marcaptoazoles acting as free molecule. Keywords: azoles, synthesis, nanoparticles, photoinitiation, radical polymerization Read more: pdf-icon...
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Methods for obtaining octogen (hmx)

Methods for obtaining octogen (hmx).

MATYS Z., POWAŁA D., ORZECHOWSKI A., MARANDA A. Please cite as: CHEMIK 2012, 66, 1, 58-63 The paper describes the methods for manufacturing octogen, a modern, thermally stable, brisant explosive. Two production technologies for obtaining the compound developed at the Institute of Industrial Organic Chemistry have been presented. The first method uses the nitration of urea with a nitrating mixture (nitric acid and oleum), and the cyclisation of dinitrourea (DNU) with hexamethylenetetramine (HMTA) and ammonia to form a semiproduct ? DPT, which is then subject to nitrolysis after adding the solution of ammonia nitrate in nitric acid. This method has been implemented in industrial applications. The second method consists in the nitrolysis of hexamethylenetetramine (HMTA) with the solution of ammonium nitrate in nitric acid in the presence of acetic acid, acetic anhydride and trioxane (a trimer of formaldehyde). Keywords: explosives, octogen, synthesis, technology Read more: pdf-icon...
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The large-scale gasification for hydrogen, methanol and liquid fuel production

Krzysztof DRESZER, Lucyna WIĘCŁAW-SOLNY, Lesław ZAPART ? Institute for Chemical Processing of Coal (IChPW), Zabrze, Poland Please cite as: CHEMIK 2013, 67, 6, 490-501 Coal is one of the most important sources of electrical energy in the world economy. Applying appropriate technologies enables its use also in the chemical and fuel sector. The development degree of available technologies guarantees the possibility of manufacturing the desired chemical products with high efficiency and compliance with environmental requirements. The decisive element in applying those technologies is the viability of the used processes, and that depends on the market environment of a considered investment. The paper presents an analysis of technical and economical conditions of converting coal to liquid fuels. Introduction Fossil fuels currently satisfy over 80% of world demand for energy. Still, the energy-climate policy of many countries, especially in the EU, aims at lowering their share in the fuel structure. The effect of such a policy in the EU was i.a. the 2008 adoption of the so called 3x20 climate package, which requires...
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