Colorimetric detection of copper in water using a Schiff base derivative

D. Peralta Domínguez; G. Ramos-Ortiz; J. L. Maldonado; M. Rodriguez; M. A. Meneses-Nava; O. Barbosa-Garcia; R. Santillan; N. Farfán

doi:10.1117/12.2024729

18 September 2013 Colorimetric detection of copper in water using a Schiff base derivative

D. Peralta Domínguez, G. Ramos-Ortiz, J. L. Maldonado, M. Rodriguez, M. A. Meneses-Nava, O. Barbosa-Garcia, R. Santillan, N. Farfán

Author Affiliations +

Proceedings Volume 8831, Organic Field-Effect Transistors XII; and Organic Semiconductors in Sensors and Bioelectronics VI; 88311I (2013) https://doi.org/10.1117/12.2024729
Event: SPIE Organic Photonics + Electronics, 2013, San Diego, California, United States

Abstract

Organic molecular sensors have the advantage of being used through an easy, fast, economical and reliable optical method for detecting toxic metal ions in our environment. In this work, we present a simple but highly specific organic ligand compound 5-Chloro-2-((E)-((E)-3-(4-(dimethylamino)phenyl)allylidene)amino)phenol (L1) that acts as a colorimetric sensor for ions in a mixture of acetonitrile/water (ratio 10:1, v:v). Binding interaction between L1 and various metal-ions has been established by ultraviolet-visible spectroscopic measurements that indicate favorable coordination of the ligand with selective metal ions, particularly, with copper. These results showed that the electronic transition band shape of L1 change after binding with copper in aqueous solution. L1 exhibited binding-induced color changes from yellow to pink one detected by the naked eye. This new sensor presented 2.5 × 10^-6 M as limit detection, even under the presence of other metal ions.

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D. Peralta Domínguez, G. Ramos-Ortiz, J. L. Maldonado, M. Rodriguez, M. A. Meneses-Nava, O. Barbosa-Garcia, R. Santillan, and N. Farfán "Colorimetric detection of copper in water using a Schiff base derivative", Proc. SPIE 8831, Organic Field-Effect Transistors XII; and Organic Semiconductors in Sensors and Bioelectronics VI, 88311I (18 September 2013); https://doi.org/10.1117/12.2024729

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