A thiazoloquinoxaline based 'turn-on' chemodosimeter for detection of copper ions
| Autor: | Saurabh S. Deshpande, Sushil Khopkar, Ganapati S. Shankarling |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Quenching (fluorescence)
Process Chemistry and Technology General Chemical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Fluorescence Copper 0104 chemical sciences Ion Electron transfer chemistry.chemical_compound chemistry Excited state Intramolecular force 0210 nano-technology Acetonitrile |
| Zdroj: | Dyes and Pigments. 147:393-399 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2017.08.037 |
| Popis: | A novel phenothiazine-thiazoloquinoxaline based sensor which acts as a fluorescence “turn-on” copper chemodosimeter was developed. Excitation of the dye, (E)-10-butyl-3-(2-(thiazolo[4,5- b ]quinoxalin-2-yl)vinyl)-10H-phenothiazine [ PTQ ] results in twisted intramolecular charge transfer (TICT) and electron transfer in the excited state which causes the quenching of fluorescence. On addition of copper to a solution of PTQ in acetonitrile, PTQ undergoes oxidation to PTQO (corresponding sulphoxide) leading to the quenching of charge transfer attributing to the enhancement of fluorescence. The detection limit of the chemodosimeter was observed to be in the range of 10 −7 M. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect