SYNTHESIS AND CHARACTERIZATION OF OLIGOMERIC CONJUGATED STRUCTURES VIA COUPLING REACTION USING MAGNESIUM FERRITE TYPE CATALYST
Silvia Dimova, Katerina Zaharieva, Veselin Sinigersky, Zara Cherkezova-Zheleva, Ivan Mitov
Pagini: 233-240
Publicat: 2 Jun 2014
Vizualizări: 4,158
Descărcări: 1,053
Rezumat: During the last few years the interest in synthesis and characteristics of well-defined oligomeric conjugated structures is constantly growing. In this study new catalysts - nanostructured magnesium ferrite type materials (MgFe2O4, Mg0.5Fe2.5O4, Mg0.25Fe2.75O4) - have been used for metathesis type coupling of alkynes and aldehyde. Substituted polyphenylacetylene from 1-phenylacetylene or 1-phenyl-1-propyne and isobutyraldehyde have been synthesized. Structure and molecular mass of the obtained substituted polyphenylacetylenes have been characterized by 1 H NMR, Fourier transformation infrared spectroscopy, Size exclusion chromatography (SEC). The results obtained show the presence of a conjugated double bond and a carbonyl group (confirmed by 1 H NMR and FTIR spectra) in the synthesized products. The substituted polyphenylacetylenes (PPA-1 and PPA-4) exhibit good electroconductivity. The catalytic behavior of magnesium ferrite type materials after the reaction was tested by Moessbauer spectroscopy. The prepared products could find a potential application in electronic devices.
Cuvinte cheie: substituted polyphenylacetylene, coupling reaction, nanodimensional magnesium ferrite type catalysts
Citează acest articol: Silvia Dimova, Katerina Zaharieva, Veselin Sinigersky, Zara Cherkezova-Zheleva, Ivan Mitov. SYNTHESIS AND CHARACTERIZATION OF OLIGOMERIC CONJUGATED STRUCTURES VIA COUPLING REACTION USING MAGNESIUM FERRITE TYPE CATALYST. Journal of International Scientific Publications: Materials, Methods & Technologies 8, 233-240 (2014). https://www.scientific-publications.net/en/article/1000167/
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