Cinnamaldehyde‐Based Chemosensor for Colorimetric Detection of Cu²⁺ and Hg²⁺ in a Near‐Perfect Aqueous Solution

Abstract

A cinnamaldehyde‐based colorimetric chemosensor TAA (N′‐((1E,2Z)‐3‐(4‐(dimethylamino)phenyl)allylidene)thiophene‐2‐carbohydrazide) was newly developed. TAA can detect Cu2+ and Hg2+ ions by different color changes from pale yellow to deep yellow and orange, respectively, in aqueous media. TAA differently binds to Cu2+ as a 1:1 ratio and Hg2+ as a 2:1 ratio. The detection limits towards both analytes turned out to be 0.08 μM for Cu2+ and 0.01 μM for Hg2+. Moreover, TAA could successfully quantify Cu2+ and Hg2+ in tap and drinking water. The detection processes of TAA towards Cu2+ and Hg2+ were demonstrated by using DFT calculations.

A Comprehensive Review on Thiophene Based Chemosensors

“…The binding constant was determined to be 2 × 10 9 M −2 with 2:1 stoichiometry. The LOD was calculated to be 0.01 µM for Hg 2+ and the sensing properties could be attributed to the ICT mechanism ( Scheme 8 ) , supported by DFT calculations [ 32 ].…”

Sulu Çözeltilerde Hg2+ Tespiti için Sinnamaldehit Türevi Bir Kolorimetrik Sensör

“…Recently, some interesting Schiff base derivatives have been synthesized. Specifically, cinnamaldehyde-based Schiff base derivatives have been reported for the monitoring of metal ions such as Cu 2+ (Aydin and Keles, 2020a), Cd 2+ (Aydin and Keles, 2020b), Ag + (Kang et al, 2018), Ni 2+ (Peralta-Dominguez et al, 2015), Al 3+ (Kar et al, 2015: Aydin andKeles, 2017) Cu 2+ /Hg 2+ (Cho et al, 2019).…”

Colorimetric Detection of Copper(II) Ions Using Schiff‐Base Derivatives

“…[30] Nowadays, Schiff base derivatives are increasingly used as colorimetric sensors due to their simple synthesis steps and high selectivity. In particular, cinnamaldehyde-based Schiff base derivatives have been developed for the detection of metal ions such as Ag + , [31] Al 3 + , [32,33] Cu 2 + /Hg 2 + [34] and Ni 2 + . [35] However, simple, rapid, high-selective, and sensitive colorimetric sensors for Cu 2 + are still rare and needed to be developed.…”