Design of a highly sensitive and selective bulk optode based on fluorescence enhancement of N,N′-bis-(1-hydroxyphenylimine)2,2′-pyridil Schiff base: Monitoring of zinc(II) ion in real samples and DFT calculation
Abdel Aziz, Ayman, Seda S., Mohammed S.,
© 2015 Elsevier B.V. All rights reserved. A novel highly sensitive and selective optical chemical sensor (optode) was fabricated for the determination of Zn2+ion. The optical sensor was prepared by incorporating recently synthesized ionophore, HPP: N,N′-bis-(1-hydroxyphenylimine)2,2′-pyridil, sodium tetraphenylborate (NaTPB) as an anionic additive, dibutyl phthalate (DBP) as a plasticizer in a poly(vinylchloride) membrane. The novel ionophore was synthesized by conventional condensation reaction between 2,2′-pyridil and 2-aminophenol and characterized using different spectroscopic techniques. The response of the sensor is based on the strong fluorescent emission enhancement of ionophore HPP upon binding to Zn2+ions. This can be correlated to the efficient Zn2+binding of HPP which promotes a good chelation-enhanced fluorescence (CHEF) effect and prevents the photoinduced electron transfer (PET) effect. The effect of several parameters in determining Zn2+were studied and optimized. Under the optimum conditions, a good linear relationship between the fluorescence response and concentration of Zn2+was achieved with high sensitivity within a wide range from 1.0 × 10-10to 1.0 × 10-2M and a limit of detection (LOD) 6.3 × 10-11M. Furthermore, the present probe exhibited a high selectivity for Zn2+over other metal ions and was successfully assessed for determination of Zn2+ions in real samples including some food and biological samples with satisfactory results. Theoretical calculations were employed to support the sensing mechanism of the sensor toward Zn2+.
|Title||Design of a highly sensitive and selective bulk optode based on fluorescence enhancement of N,N′-bis-(1-hydroxyphenylimine)2,2′-pyridil Schiff base: Monitoring of zinc(II) ion in real samples and DFT calculation||Authors||Abdel Aziz, Ayman ; Seda S. ; Mohammed S.||Issue Date||1-Feb-2016||Publisher||ELSEVIER SCIENCE SA||Journal||Sensors and Actuators, B: Chemical||DOI||566
|Scopus ID||2-s2.0-84944348643||Web of science ID||WOS:000366458700075|
Recommend this item
Similar Items from Core Recommender Database
Citations 24 in scopus
views 10 in Shams Scholar
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.