Nature of the lowest electron transitions in the linear conjugated systems derivatives of 2, 6-diphenylthiapyrylium: Cationic trimethinecyanine, neutral ethylene, its …

…, DO Melnyk, OD Kachkovsky, OI Tolmachev

Index: Kudinova; Melnyk; Kachkovsky; Tolmachev Journal of Molecular Structure, 2012 , vol. 1011, p. 59 - 65

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Abstract

A series of linear conjugated systems of different types containing the 2, 6- diphenylthiapyrylium residues as terminal groups have been synthesized and investigated by the combined spectral and quantum-chemical methods. The analysis of calculated by ab initio and semi-empirical methods of their molecular geometry and electron structure, and nature of the lowest electron transitions has shown that four types, cationic cyanine, ...