Journal
DYES AND PIGMENTS
Volume 165, Issue -, Pages 264-272Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.02.027
Keywords
Zinc ion; Fluorescent chemosensor; Sulfide; Theoretical calculations; Quinoline; Zebrafish imaging
Funding
- KEITI [2016001970001]
- NRF (National Research Foundation of Korea) [2018R1A2B6001686, 2017R1A2B3002585]
- National Research Foundation of Korea [2017R1A2B3002585] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A new quinoline-based fluorescent chemosensor MDCQA was designed and synthesized for the relay sensing of Zn2+ and S2-. MDCQA showed turn-on fluorescence toward Zn2+, and the resulting complex was able to detect S2- among the competitive anions by turn-off fluorescence. Detecting limits (0.06 mu M and 2.33 mu M) for zinc ion and sulfide were remarkably below WHO guidelines (76.0 mu M for zinc ion and 14.7 mu M for sulfide). In addition, sensor MDCQA successfully operated for imaging Zn2+ in live zebrafish larvae and quantifying it in real water samples. The detecting properties and mechanisms of MDCQA toward zinc ion and sulfide were demonstrated by UV-vis and fluorescence spectroscopy, NMR titration, DFT calculations and ESI-Mass.
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