Development of a reversible chromogenic sensor for Cu2+ in aqueous ethanol

[Display omitted] •A simple cost effective sensor is synthesized for naked eye detection of Cu2+.•It can be efficiently used at low detection limit in aqueous medium.•It displays reversibility with EDTA.•Fast track paper strip application has been performed. A naphthaldehyde appended sensor has been...

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Bibliographic Details
Published in:Materials letters 2021-07, Vol.295, p.129869, Article 129869
Main Authors: Yadav, Pranjalee, Gond, Sarita, Singh, Aayoosh, Singh, Vinod P.
Format: Article
Language:English
Subjects:
Charge transfer
Chemical sensors
Chemoreceptors
Chromogenic
Copper
Detection limit
DFT study
Ethanol
FTIR
Materials science
Sensors
Spectroscopy
Stoichiometry
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Summary:[Display omitted] •A simple cost effective sensor is synthesized for naked eye detection of Cu2+.•It can be efficiently used at low detection limit in aqueous medium.•It displays reversibility with EDTA.•Fast track paper strip application has been performed. A naphthaldehyde appended sensor has been synthesized and characterized by spectroscopic techniques. The sensor has been efficiently utilized in selective chromogenic detection of Cu2+ in aqueous ethanol amongst various metal ions. Cu2+ interacts with the sensor in 1:2 (M:L) stoichiometry with binding constant of 1.1 × 103 M−1/2 and detection limit of 9.342 × 10−7 M. Ligand to metal charge transfer (LMCT) accounts for the selective color change from colorless to yellow with Cu2+ as suggested by UV–Vis and DFT studies. This sensor offers certain advantages over the existing chemosensors in terms of reversibility, reusability and solid state applications.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.129869