Azaneylylidene-based tetradentate Schiff base as a new "ON-OFF" fluorescent probe for the detection of Cu(II) ion: Synthesis, characterization and real sample analysis.

Autor: Divyashree NR; Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru, Karnataka 570 006, India., Revanasiddappa HD; Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru, Karnataka 570 006, India. Electronic address: revanasiddappa1066@gmail.com., Bhavya NR; Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru, Karnataka 570 006, India; Department of Studies in Physics, Vidyavardhaka College of Engineering, Mysore, 570 002 Karnataka, India., Mahendra M; Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru, Karnataka 570 006, India., Jayalakshmi B; Department of Botany, Government College for Women (Autonomous), Mandya 571 401, Karnataka, India., Shivamallu C; Department of Biotechnology and Bioinformatics, School of Life Sciences, JSS Academy of Higher Education & Research, Myuru 570015, Karnataka, India., Prasad Kollur S; School of Physical Sciences, Amrita Vishwa Vidyapeetham, Mysuru Campus, Mysuru, Karnataka 570 026, India.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2023 May 05; Vol. 292, pp. 122435. Date of Electronic Publication: 2023 Feb 03.
DOI: 10.1016/j.saa.2023.122435
Abstrakt: Herein we describe the synthesis of Cu 2+ sensor, 2,2'-((1E,1'E)-((4-chloro-1,2-phenylene)bis(azaneylylidene))bis(methane-ylylidene))bis(4-bromophenol) (CPMB) and characterization using various spectral and analytical techniques. CPMB exhibited high selectivity towards Cu 2+ ions via fluorescence quenching mechanism, which combined the character of high selectivity towards Cu 2+ assay even in the presence of other common metal ions such as Cu 2+ , Al 3+ , Co 2+ , Ni 2+ , Mn 2+ , Zn 2+ Pb 2+ Cd 2+ , Fe 2+ , Hg 2+ , Mg 2+ and Fe 3+ (30 μM) ethanol-water (1:9 v/v) system. Upon the addition of the solution of Cu 2+ ions to CPMB, the complexation of Cu 2+ with CPMB leads to the immediate formation of light green color, indicating that CPMB can act as simple colorimetric sensor, particularly for Cu 2+ in the presence of most interfering metal ions in ethanol-water medium. More interestingly, the ability of sensing behavior of CPMB for Cu 2+ ion in the real water samples (tap water and lake water samples) was also investigated. Further, Job's plot confirmed that the complexation occurred in 1:1 ratio (ligand:metal). Furthermore, the fluorescence inhibiting factor showed a good linear relationship with the concentration of Cu 2+ with detection limit of 0.302 μM. The electronic transitions of the complex in ethanol were studied using DFT calculations.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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