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Proceedings Paper

Colorimetric detection of copper in water using a Schiff base derivative
Author(s): D. Peralta Domínguez; G. Ramos-Ortiz; J. L. Maldonado; M. Rodriguez; M. A. Meneses-Nava; O. Barbosa-Garcia; R. Santillan; N. Farfán
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Paper 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.

Paper Details

Date Published: 18 September 2013
PDF: 6 pages
Proc. SPIE 8831, Organic Field-Effect Transistors XII; and Organic Semiconductors in Sensors and Bioelectronics VI, 88311I (18 September 2013); doi: 10.1117/12.2024729
Show Author Affiliations
D. Peralta Domínguez, Ctr. de Investigaciones en Óptica AC (Mexico)
G. Ramos-Ortiz, Ctr. de Investigaciones en Óptica AC (Mexico)
J. L. Maldonado, Ctr. de Investigaciones en Óptica AC (Mexico)
M. Rodriguez, Ctr. de Investigaciones en Óptica AC (Mexico)
M. A. Meneses-Nava, Ctr. de Investigaciones en Óptica AC (Mexico)
O. Barbosa-Garcia, Ctr. de Investigaciones en Óptica AC (Mexico)
R. Santillan, CINVESTAV del Instituto Politecnico Nacional (Mexico)
N. Farfán, Univ. Nacional Autónoma de México (Mexico)


Published in SPIE Proceedings Vol. 8831:
Organic Field-Effect Transistors XII; and Organic Semiconductors in Sensors and Bioelectronics VI
Zhenan Bao; Ruth Shinar; Ioannis Kymissis; Iain McCulloch, Editor(s)

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