Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 264, Issue -, Pages 304-311Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.03.017
Keywords
Ratiometric fluorescent sensor; Normal-tautomer tautomerism; Excited-state charge transfer; Substituent effect; Flavone derivatives
Funding
- National Natural Science Foundation of China [21676218, 21476185, 121472016, 21272030]
- Fundamental Research Funds for the Central Universities [2014YB027, 2452015447, 2452013py014]
- Shaanxi Province Science and Technology [2014K11-01-02-06]
Ask authors/readers for more resources
Fluorescent sensors are important tools in environment and life science. Ratiometric fluorescent sensors are more advantageous than single intensity-based ones. Excited-state intramolecular proton transfer (ESIPT) molecules endow dual fluorescence from the excited enol and keto tautomers, providing excellent platforms for constructing ratiometric fluorescent sensors. However, the current ESIPT mechanism for ratiometric fluorescent sensors is relatively simple, resulting in that its application limits in given systems. Therefore, it is essential to construct a ratiometric fluorescent sensor that based on ESIPT molecule with reliable, controlled and general strategy. In this work, we employed a new strategy to construct a ratiometric fluorescent sensor ally1-(4'-methyl-3-hydroxyflavone) carbonate (FA) which is based on the finding that the electron-withdrawing substituted group could nearly block the normal-tautomer tautomerism taking place through excited-stated charge transfer (ESCT). FA exhibited highly selective and ratiometric fluorescent response to Al3+ and could detect Al3+ at a low concentration of 0.75 OA in aqueous solution. FA can detect Al3+ in tap and laker water samples, and in living cells. The proof-of-principle method provides a common strategy for design of ratiometric fluorescent sensors. (C) 2018 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available