Article
Evaluation of N-Alkyl-bis-o-aminobenzamide receptors for the determination and separation of metal ions by fluorescence, UV-visible spectrometry and zeta potential
Fecha
2019-05-04Registro en:
1420-3049
Scopus
Autor
Martinez Quiroz, Marisela
Aguilar-Martínez, Xiomara
Oropeza-Guzmán, Mercedes T.
Valdez, Ricardo
López Maldonado, Eduardo Alberto
Institución
Resumen
This paper presents the synthesis and evaluation of physicochemical behavior of a new
series of N-alkyl-bis-o-aminobenzamides (BOABs) in aqueous solution. The study was targeted to the
complexing capacity of five metal ions (Fe2+, Cu2+, Cd2+, Hg2+ and Pb2+) of environmental concern
as the medullar principle of a liquid phase sensor for its application in the determination of these
metal ions due to its versatility of use. Molecular fluorescence, UV-visible and Zeta potential were
measured for five BOABs and the effect of alkyl groups with different central chain length (n = 3,
4, 6, 8 and 10) on physicochemical performance determined. The results have shown that these
derivatives present higher sensibility and selectivity for Cu2+ even in the presence of the other metal
ions. An additional application test was done adding a pectin (0.1 wt %) solution to the BOAB-Cu+2
complex to obtain a precipitate (flocs) as a potential selective separation process of Cu from aqueous
solution. The solid was then lyophilized and analyzed by SEM-EDS, the images showed spheric
forms containing Cu+2 with diameter of approximately of 8 μm and 30 wt %.