Substituted xanthylocyanines, Part IV: Trinuclear dyes with a pyronine nucleus

Trinuclear, dicationic and cation–anionic dyes carrying a pyronine nucleus were synthesized. Whilst their absorption spectra displayed two bands corresponding to the absorption of the cyanine and pyronine chromophores, none of the dyes fluoresced, in contrast to the parent compounds. The spectral ev...

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Bibliographic Details
Published in:	Dyes and pigments Vol. 77; no. 2; pp. 369 - 373
Main Authors:	Shandura, M.P., Poronik, Ye. M., Kovtun, Yu. P., Ishchenko, A.A.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 2008
Subjects:	Biscyanine dyes Chromophore interaction, UV–vis spectra Xanthylium dyes Xanthylium dyes Biscyanine dyes Chromophore interaction, UV–vis spectra
Online Access:	Get full text
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Summary:	Trinuclear, dicationic and cation–anionic dyes carrying a pyronine nucleus were synthesized. Whilst their absorption spectra displayed two bands corresponding to the absorption of the cyanine and pyronine chromophores, none of the dyes fluoresced, in contrast to the parent compounds. The spectral evidence suggests a significant, though not perpendicular, twist around the bond between the cyanine and pyronine moieties.
ISSN:	0143-7208 1873-3743
DOI:	10.1016/j.dyepig.2007.06.007