Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 191, Issue -, Pages 158-164Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.09.114
Keywords
Pyridoxal-based; Copper ions; Zinc ions; Naked eye; Ratiometric fluorescence
Funding
- National Natural Science Foundation of China [21072119, 21102086]
- Shanxi Province Science Foundation for Youths [2012021009-4, 2013011011-1]
- Shanxi Province Foundation for Returnee [2012-007]
- Taiyuan Technology star special [12024703]
- Program for the Top Young and Middle-aged Innovative Talents of Higher Learning Institutions of Shanxi (TYMIT)
- CAS Key Laboratory of Analytical Chemistry for Living Biosystems Open Foundation [ACL201304]
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A pyridoxal-based fluorescein derivative was synthesized by reacting fluorescein hydrazide and pyridoxal hydrochloride in ethanol and characterized by NMR, ESI-MS and X-ray. The optical properties of probe were investigated in methanol: HEPES solution. The probe displayed selectivity for Cu2+, which was characterized using UV-visible spectroscopy. Moreover, the process also allowed visual detection of Cu2+ by a colorless to yellow change. In contrast, selectivity toward Zn2+ was determined in the emission spectra showing OFF-ON type fluorescence changes from colorless to green. This represents the first reported pyridoxal-based sensor capable of detecting both Cu2+ and Zn2+ using two different modes. Furthermore, it can be used to bioimaging. (C) 2013 Elsevier B.V. All rights reserved.
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