Synthesis and analytical applications of thiosemicarbazide derivative

Abstract

1-(4-tert-butylphenyl)4-(4-trifluoromethylphenyl)carbonylthiosemicarbazide (OBS) and was synthesized by reaction of 4-tert-Butylbenzoic hydrazide with 4-(trifluoromethyl)phenylisothiocyanate. The influence of many metal cations on the spectroscopic properties of the synthesized compound was investigated in dmso-water (1:1) by means of emission spectrometry.The influence of a series of metal ions including Cu2+,Co2+ , Al3+,Cr3+,Fe3+, Pb2+, Ni2+, Cd2+, Zn2+,Ag+ , Ba2+ , Mo3+, Se,Ca2+,Sn4+,Sb3+,Na+, K+,Li+,Sc3+, Sr2+, As3+, Be2+ and Mg2+on the spectroscopic properties of the ligand was investigated by means of emission spectrometry.The compounds were selectively complexed with Fe3+among many metal ions. The complex stoichiometry and the stability constant were determined by fluorimetric measurements. The ligand having thiosemicarbazide (OBS) showed sensitivity for Fe3+ ion with a linear range between 0.5 and 5.5 mg/L. The new method was applied in the determination of iron in the the sandy-soil reference material. A modified Standard addition method was used to remove the matrix effect.Detection and quantification limits were 0.07 and 0.214 mg/L, respectively.The simple and cost-effective method can be applied to soil samples.