Synthese von Diphenyl aus Benzol im kalten Plasma elektrischer Entladungen

Abstract

Die plasmachemische Synthese von Diphenyl aus Benzol wird in stillen elektrischen 50-Hz-Entladungen, in Gleichstrom-und

Plasma polymerization chemistry of unsaturated hydrocarbons: neutral species identification by mass spectrometry

“…Three works report on species identification in a pure benzene discharge [22][23][24]. Biphenyl (m/z = 154) reported by Weisbeck can likely correspond to our species C 12 H 10 (154), by far the dominant species in its mass region [22].…”

“…Identification of species in benzene discharges was scarcely investigated. Four works reported species from a fundamental or polymerization point of view [22][23][24][25]. Mixing it with noble gases, other studies focused on its decomposition in atmosphere for environmental protection [26,27], or on soot formation in combustion flames [28,29].…”

A Comparative Study of Microwave and Radiofrequency Plasma Polymerization of Benzene

“…Several books and review articles covering all or part of the subject have been published recently (2)(3)(4)(5). In another work with the same reactor design and benzene, the formation of diphenyl was shown to be more important in radiofrequency discharges than in microwave discharges, but the formation of the other reaction products, including polymers, was not studied (11). However, the specific influence of the various reaction parameters, particularly discharge frequency, is not yet quite elucidated.…”

“…For instance, in a work where the same reactor design was used with toluene as monomer, pressure was not kept constant, and no clear differences between radiofrequency and microwave could be evidenced (10). In another work with the same reactor design and benzene, the formation of diphenyl was shown to be more important in radiofrequency discharges than in microwave discharges, but the formation of the other reaction products, including polymers, was not studied (11).…”

Plasma polymerization of phenylsilane

“…Aromatic compounds such as benzene, toluene, xylene, styrene, etc, were chosen for this purpose. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] These compounds, however, were subjected to ring-opening reactions in a discharge state and yielded plasma polymers containing alkyl chains rather than aromatic groups. This unexpected evidence in these plasma polymerizations may be the result of activation processes by the action of plasma.…”