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Diphenylmaleimide derivatives and their efficiency in off-on Hg2+ fluorometric sensing |
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| รหัสดีโอไอ | |
| Creator | 1. Nantanit Wanichacheva 2. Chantana Wainiphithapong 3. Oranual Hanmeng 4. Vannajan Sanghiran Lee 5. Kate Grudpan |
| Title | Diphenylmaleimide derivatives and their efficiency in off-on Hg2+ fluorometric sensing |
| Publisher | Maejo University |
| Publication Year | 2555 |
| Journal Title | Maejo International Journal of Science and Technology |
| Journal Vol. | 6 |
| Journal No. | 3 |
| Page no. | 449 |
| Keyword | mercury sensor,fluoroionophores,diphenylmaleimide,Hg2+-selectivity |
| ISSN | 1905-7873 |
| Abstract | Two novel fluoroionophores (Sensors 1 and 2) possessing one and two units of diphenylmaleimide fluorophore covalently bound to 2-[3-(2-aminoethylsulfanyl)propylsulfanyl] ethanamine were prepared for the selective detection of Hg2+ ions. The binding ability with Hg2+ was investigated by fluorescence spectroscopy. Sensor 1 exhibited highly sensitive and selective off-on fluorescence enhancement at 500 nm upon binding to Hg2+ and was shown to discriminate various competing metal ions, particularly Cu2+ and Pb2+, as well as Li+, Na+, Mg2+, Cd2+, K+, Al3+, Fe3+, Ca2+, Ba2+, Co2+, Mn2+ and Zn2+ with a detection limit of 6.72 x 10-7 M. On the other hand, Sensor 2 was found to be inferior fluoroionophore to Sensor 1 in terms of selectivity in the presence of competitive ions such as Mn2+ and Al3+. |
