Novel bis-styryl dyes based on a quaternized centrosymmetrical benzodipyrrolenine moiety were synthesized by reaction of a quaternized benzodipyrrolenine with two equivalents of 4-dimethylaminobenzaldehyde, 4-dimethylaminocinnamoic aldehyde or 4-(3,5-diphenyl-4,5-dihydro-1H-1-pyrazolyl)benzaldehyde. The molecular structures and spectral properties of these dyes were investigated using PM3 and PPP...
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