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چکیده
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Detection of inorganic anions by the immobilized Schiff-base receptor on zeolite-Y Saba mahdavi hezaveh, Mojgan Zendehdel. Hamid Khanmohammadi Department of Chemistry, Faculty of science, Arak University, Arak 38156-8-8349, Iran 1. Introduction: Research on design and synthesize of molecular sensors for detection anions is very important, because of the present anions in biological, agriculture, environmental, pharmacologic and industrial [1-4]. Among variety important anions, hydrogen sulfate anion takes more attention; this anion may be exist in sewage industrial and agriculture fertilizer so can pollute surface water and ground water [5-6] .The PH water was made decrease dramatically by anion bisulfate, so presence of HSO4- anion in water causing irritation skin and eyes [7]. Already most of the molecular sensor works in organic solvent or blend of organic solvent and water. In other hand many studies reported to detect of HSO4- by free molecular sensor based on hydrogen band that has low sensitivity [8-9]. In this paper we synthesize a molecular sensor was immobilized on the zeolite, that can detection mention anion in aqueous solvent and mechanism detection is based on break band Schiff base [11]. 2. Experimental: The Molecular sensor was synthesized by reaction between azo based on ortovaniline and APTE, then was immobilized over zeolite. 3. Results and discussion: Figure (1) demonstrated that anion HSO4- was detected by Schiff base receptor on the zeolite among other anions. Such as F-, OAC-, HSO4-, CN-, N3-, NO3-, PO4-2 As can be seen in fig (2), Indicated that variety concentrations of anion bisulfate were supplied in rang of (1.10-5 – 5.10-5) in present Schiff base receptor on the zeolite. The lowest concentration of anion was detected 4.10-5. IR Spectroscopy: Figures (3) showed spectrum FT-IR of ligand was immobilized over zeolite. . In fig (3a) depicts of zeolite, and it can be seen index peaks related to zeolite such as peak at 1014 cm-1 attribute to
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