UV-Vis Spectral Properties of Water-Soluble 3,5-bis-(2,4,6-tri-hydroxyphenylazo)benzoic Acid and their Application for pH Detection
| Autor: | Sh. Liu, L. Hu, J. Hao, Y. Zhang, H. Yuan, Zh. Yan, Y. Li, W. Yao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Double bond 010401 analytical chemistry Phloroglucinol 02 engineering and technology Conjugated system 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Spectral line 0104 chemical sciences chemistry.chemical_compound Ultraviolet visible spectroscopy Linear range chemistry 0210 nano-technology Spectroscopy Benzoic acid Nuclear chemistry |
| Zdroj: | Journal of Applied Spectroscopy. 87:925-929 |
| ISSN: | 1573-8647 0021-9037 |
| Popis: | We present a multiple water-soluble azo dye with a D–π–A–π–D conjugated structure, 3,5-bis-(2,4,6-trihydroxyphenylazo)benzoic acid (THPBA) developed using phloroglucinol as the electron-donating group, benzoic acid as the electron-accepting one, and the azo double bond as the bridging one. The UV-Vis spectral properties of the elaborated structure as well as its spectral response to the pH are investigated in detail. The results show that the present THPBA, combining carboxyl, azo, and multihydroxyl groups, possesses excellent UV-vis spectra (emax = 2.794 × 104–2.115×104 L/mol∙cm) with changing pH values and solvents. Especially in DMF –H2O (v/v = 1:9), there is an obvious spectral response for THPBA to pH in the linear range 5.2–7.5, which is successfully applied to detect pH values in aqueous and commercial fruit juice samples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|