Ortho-hydroxyl-oriented tandem-responsive diacylhydrazones with super sensitivity for Al3+ and subsequent potential recognition of Cu2+
| Autor: | Hua Liang, Yonggang Liu, Daqiang Wu, Xianguo Tuo, Zongchen Li, Luyao Zhong, Ke Dai, Minhao Yan |
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| Rok vydání: | 2018 |
| Předmět: |
Detection limit
Tandem Chemistry Metal ions in aqueous solution Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Fluorescence 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Materials Chemistry Mass spectrum Proton NMR Electrical and Electronic Engineering 0210 nano-technology Selectivity Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 269:62-69 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2018.04.159 |
| Popis: | Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al3+ detection were investigated. Except 2d, all the other compounds exhibit notable turn-on fluorescence toward Al3+ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho-OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al3+ systems show selective fluorescence turn-off for Cu2+, providing a potential platform for tandem recognition of Al3+ and Cu2+. 2a as a standard, shows a 1:2 molar ratio to Al3+ confirmed by Job’s plot, 1H NMR spectra and mass spectra, and its detection limit for Al3+ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al3+ detection, anion selectivity was also explored and it shows that 2a, 2b and 2c all have selectivity toward CN− evidenced by UV-vis spectra. |
| Databáze: | OpenAIRE |
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