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https://www.um.edu.mt/library/oar/handle/123456789/70638| Title: | Synthesis and spectrophotometric studies of water-soluble amino[bis(ethanesulfonate)] azobenzene pH indicators |
| Authors: | Cardona, Maria A. Magri, David C. |
| Keywords: | Acid-base chemistry Colorimetric analysis Flash photolysis |
| Issue Date: | 2014 |
| Publisher: | Elsevier Ltd. |
| Citation: | Cardona, M. A., & Magri, D. C. (2014). Synthesis and spectrophotometric studies of water-soluble amino [bis (ethanesulfonate)] azobenzene pH indicators. Tetrahedron Letters, 55(33), 4559-4563. |
| Abstract: | Three azobenzene pH indicators with amino[bis(ethanesulfonate)] substituents were synthesized and studied by UV–visible absorption spectroscopy in aqueous solution. The indicators exhibit brilliant and distinct colour changes with transitions between pH 1 and 4. Significant changes were observed in the UV–visible spectra on titration with acid with pKa values ranging from 2.2 to 2.8. The indicators demonstrate individual changes in colour as a function of pH. These novel pH indicators complement the existing library of azobenzene indicator dyes and may be useful for environmental situations with high proton concentrations. |
| URI: | https://www.um.edu.mt/library/oar/handle/123456789/70638 |
| Appears in Collections: | Scholarly Works - FacSciChe |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| Synthesis_and_spectrophotometric_studies_of_water_soluble_amino_bis_ethanesulfonate_azobenzene_pH_indicators.pdf Restricted Access | 1.27 MB | Adobe PDF | View/Open Request a copy |
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