Author(s) Tang, X.; Wang, Y.; Han, J.; Ni, L.; Wang, L.; Li, L.; Zhang, H.; Li, C.; Li, J.; Li, H.
Journal Spectrochim Acta A Mol Biomol Spectrosc
Date Published 2018 Feb 15

A simple relay identification fluorescence probe for Fe3+ and phosphate anion with "on-off-on" switching was designed and synthesized based on the phenylthiazole and biphenylcarbonitrile. Probe 1 displayed highly selective and sensitive recognition to Fe3+ in HEPES aqueous buffer (EtOH/H2O=2:8, v/v, pH=7.4) solutions. The optimized structures and HOMO and LUMO of probe 1 and [1-Fe3+] complex were obtained by the density functional theory (DFT) calculations with B3LYP as the exchange and correlation functional using a suite of Gaussian 09 programs. The [1-Fe3+] complex solution also showed a high selectivity toward PO43-. The lower limits of detection of probe 1 to Fe3+ and [1-Fe3+] complex to PO43- were estimated to 1.09×10-7M and 1.86×10-7M. Besides, the probe 1 also was used to detected the target ions in real water sample and living cells successfully.

DOI 10.1016/j.saa.2017.10.018
ISSN 1873-3557
Citation Spectrochim Acta A Mol Biomol Spectrosc. 2018;191:172179.

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