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A novel intramolecular donor–acceptor system of four isomers consisting of 7H-benzimidazo(2,1-a)benz(d,e)isoquinolin-7-ones and diarylamine units was synthesized and characterized; the absorption and fluorescence spectra of the system in a variety of solvents were investigated. Intramolecular charge transfer was confirmed within the system by virtue of shifts in emission maximum with increasing solvent...
Different 10H-phenothiazine derivatives modified at their 3- and 3,7-positions with conjugated electron-deficient pyridine or pyridinium groups using ethenyl linkers are described. Spectral variations of 3-((E)-2-(Methylpyridium-4-yl)vinyl)-10H-phenothiazine iodide and 3,7-bis((E)-2-(Methylpyridium-4-yl)vinyl)-10H-phenothiazine diiodide, which are attributed to intramolecular charge transfer, electronic...
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