The synthesis,photophysical and thermal properties of new anthrapyrimidine colorants |
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| Authors: | Sreejit R Menon Ganapati S Shankarling |
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| Affiliation: | Department of Dyestuff Technology, Institute of Chemical Technology, University of Mumbai, N. P. Marg, Matunga, Mumbai – 400019, IndiaEmail: gs.shankarling@ictmumbai.edu.in, gsshankarling@gmail.com |
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| Abstract: | The thermal and photostability of novel anthrapyrimidine‐containing colorants obtained by the condensation of various substituted aromatic amines with 6‐bromo‐7H‐benzoe]perimidin‐7‐one are described. The colorants were characterised by proton nuclear magnetic resonance, elemental analysis and mass spectra. Thermogravimetric analysis showed that these colorants are thermally stable up to 250 °C. The UV–visible absorption spectra of the colorants were studied in solvents of differing polarity; the colorants exhibited slight positive solvatochromism. The photostability studies in dimethyl sulphoxide solvent were recorded by monitoring photodegradation of the colorants spectrophotometrically using a standard calibration curve. All the colorants exhibited excellent photostability. The light fastness study of two colorants in polypropylene showcases their ability as useful colorants for plastics. |
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