Abstract—Recently designing of fluorescent chemosensor for heavy metal ions detection with high specificity and sensitivity have been explored. In this works, two steps synthesis of A was prepared using Schiff base technique. Monocondensed ligand was prepared by reacting diethylenetriamine with 4-dimethylaminobenzaldehyde, followed by attaching 3-pyridinecarbaldehyde on the other side of diethylenetriamine. Sensor A was fully characterized by FT-IR, 1H-NMR and elemental analysis (CHN). The signal at 1639.46 cm-1 in FT-IR spectrum was assigned to C=N, formed after condensation reaction in between aldehyde and amine. NH2 peak at 3278.78 cm-1 still appeared proved the monocondensed ligand. 1H-NMR values at 8.19 ppm and 2.72 ppm were assigned to HC=N and -NH2 respectively. Dicondensed ligand was formed after addition of 3-pyridinecarboxaldehyde. NH2 signal in both FT-IR and 1H-NMR spectrum was absent indicating both amines in triamine undergone condensation to form dicondensed. 1H-NMR spectrum at 8.19 ppm was assigned to (HC=N) appeared due to the formation of imine proton. The fluorescent spectral measurements revealed that A was selective towards Fe3+ ions but not for other metal ions such as Co2+, Ni2+, Cu2+ and Zn2+. The detection limit of A was 6.49 × 10-5 M and expected to be useful as chemical sensor.
Index Terms—Diethylenetriamine, Fe3+ ion, Fluorescence Chemosensor, Schiff base.
The authors are with the Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia (e-mail: sharizal187@perlis.uitm.edu.my, salamiah882@perlis.uitm.edu.my, aainadnan@gmail.com).
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Cite: Sharizal Hasan, Salamiah Zakaria, and Siti Nur Ain Mohd Adnan, "Fluorescent Chemosensor Bearing Amine and Benzenyl Functionality for Fe3+ Ions Detection in Aqueous Solution," International Journal of Chemical Engineering and Applications vol. 8, no. 1, pp. 28-32, 2017.
