Near-infrared absorbing delocalized cationic azo dyes
Novel, delocalized, cationic azo dyes derived from benzothiazole, benzoselenazole, indole and quinoline, displaying strong absorption around 700–800 nm, have been prepared in moderate to good yields. The synthesis involved the Knoevenagel condensation of an intermediate azo compound, possessing a 4-...
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| Veröffentlicht in: | Dyes and pigments 2009-08, Vol.82 (2), p.118-123 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
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| Online-Zugang: | Volltext |
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| Zusammenfassung: | Novel, delocalized, cationic azo dyes derived from benzothiazole, benzoselenazole, indole and quinoline, displaying strong absorption around 700–800
nm, have been prepared in moderate to good yields. The synthesis involved the Knoevenagel condensation of an intermediate azo compound, possessing a 4-chloro-5-formylthiazole moiety, with methylenic bases generated
in situ from benzoazolium and quinolinium salts. |
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| ISSN: | 0143-7208 1873-3743 |
| DOI: | 10.1016/j.dyepig.2008.12.003 |