Exploring the Metal Sensing Capability of Tetrazole Hydrazide Schiff base

Tetrazole ring based salicylaldehyde Schiff base, 2-Hydroxy Phenyl Methylidene-2-1H-Tetrazol-5yl-Acetohydrazide (TSB) was prepared by Microwave assisted synthesis and characterized by Mass, UV-Vis, Infrared, H1-NMR and TG-DTA techniques. Thermogravimetric analysis suggested its explosive property. Its metal sensing capability was investigated against 14 different metal ions (Ba2+, Cd2+, Co2+, Fe2+, K+, Mn2+, Ni2+, Pb2+, Zn2+, Na+, Mg2+, Al3+, Cu2+ and Hg2+). The results were analyzed by Visual, UV-Vis and Fluorescence spectral techniques. Visual analysis showed pale yellow colored TSB + Fe solution in contrast to all other colorless TSB + metal solutions. Considerable hyperchromic shift occurred for Pb and Fe in UV-Vis spectra. Bathochromic shift and Quenching were seen for these two cations in addition to Na & Mg in Fluorescence spectrum. Therefore, TSB has the propensity to function as an efficient metal sensor for Pb, Fe, Na and Mg.