Hydroxyl phenyl imino modified phenanthro[9,10-d] imidazole: An AIEE-active sensor for determination of Cu2+ in water samples and subsequent 'turn-on' recognition of Cr3+ with logic gates
| Autor: | Liyan Wang, Guangming Yin, Yin Haochun, Yan Gao, Wenbo Wang, Bing Zhao, Wei Kan, Liu Ting, Jianxin Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Tandem Scanning electron microscope 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Atomic and Molecular Physics and Optics 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound chemistry Proton NMR Mass spectrum Imidazole Physical chemistry Density functional theory 0210 nano-technology Instrumentation Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 217:18-26 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/j.saa.2019.03.060 |
| Popis: | A 2-hydroxyl phenyl imino modified phenanthro[9,10-d]imidazole probe (PPIP) was synthesized and its aggregation-induced emission enhancement (AIEE) phenomenon in aqueous medium was characterized by the Tyndall phenomena, morphologies of scanning electron microphotograph (SEM) as well as the enhanced fluorescence intensities. The AIEE-active PPIP in aggregated states exhibited a sensitive detection for Cu2+ along with the elimination of fluorescence intensity; subsequently, in situ PPIP-Cu2+ complex showed selective fluorescence “turn-on” for Cr3+, providing a potential platform for tandem recognition of Cu2+ and Cr3+. The 1:1 M ratio between PPIP and Cu2+ was confirmed by Job's plot, 1H NMR spectra, mass spectra and density functional theory (DFT) calculations. The detection limits for Cu2+ and Cr3+ were 4.127 × 10−2 μM and 9.404 × 10−1 μM, respectively. Moreover, this successive recognition could be utilized to construct the molecular logic gates by the fluorescence changes. In addition, PPIP was successfully employed for quantitative detecting Cu2+ in real water samples with satisfactory results. |
| Databáze: | OpenAIRE |
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