Spectrochim Acta A Mol Biomol Spectrosc
Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, 600 Changjiang Road, Harbin 150030, China. Electronic address:
Published: February 2023
Based on the classical Schiff base reaction, fluorescent probe dimethyl 5-((pyren-1-ylmethylene)amino)isophthalate (PAI) is designed and synthesized through introducing Schiff base structure to pyrene unit for structural modification. The structure of the synthesized probe PAI is determined and characterized by FT-IR, H NMR, C NMR and HRMS. PAI is a type of "turn-on" probe which can specifically recognize Al ion with high selectivity. The limit of detection is calculated to be 3.07 × 10 M, which proves the probe's high sensitivity and is lower than that of many efficient reported probes. The probe PAI is intrinsically non-fluorescent due to the photoinduced electron transfer (PET) process. However, the addition of Al ion leads to the breakage of the carbon-nitrogen double bond of Schiff base in PAI resulting in the product without PET property, which shows a typical localized state with enhanced fluorescence and blue color. In addition, PAI can recognize Al ion through test papers, which is in favor of the future research regarding to Al ion sensing.
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http://dx.doi.org/10.1016/j.saa.2022.122085 | DOI Listing |
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