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A Simple Turn-off Schiff Base Fluorescent Sensor for Copper (II) Ion and Its Application in Water Analysis
- Source :
- Molecules, Volume 26, Issue 5, Molecules, Vol 26, Iss 1233, p 1233 (2021)
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- An aniline-functionalized naphthalene dialdehyde Schiff base fluorescent probe L with aggregation-induced enhanced emission (AIEE) characteristics was synthesized via a simple one-step condensation reaction and exhibited excellent sensitivity and selectivity towards copper(II) ions in aqueous media with a fluorescence “ turn-off ” phenomenon. The detection limit of the probe is 1.64 × 10−8 mol·L−1. Furthermore, according to the results of the UV-vis/fluorescence titrations, Job’s plot method and 1H-NMR titrations, a 1:2 stoichiometry was identified. The binding constant between L and Cu2+ was calculated to be Ka = 1.222 × 103. In addition, the AIEE fluorescent probe L could be applied to detection in real water samples with satisfactory recoveries in the range 99.10–102.90% in lake water and 98.49–102.37% in tap water.
- Subjects :
- Models, Molecular
synthesis
Inorganic chemistry
Pharmaceutical Science
chemistry.chemical_element
water detection
Naphthalenes
Crystallography, X-Ray
Article
Analytical Chemistry
lcsh:QD241-441
chemistry.chemical_compound
lcsh:Organic chemistry
Tap water
Drug Discovery
Physical and Theoretical Chemistry
Schiff Bases
Fluorescent Dyes
Ions
Detection limit
AIEE
Schiff base
Molecular Structure
Chemistry
Organic Chemistry
Fluorescence
Copper
Binding constant
copper(II) ion
Chemistry (miscellaneous)
fluorescent probe
Molecular Medicine
Titration
Water Pollutants, Chemical
Stoichiometry
Subjects
Details
- ISSN :
- 14203049
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Molecules
- Accession number :
- edsair.doi.dedup.....1172bc9db086f5f6c34962e6a728e44e