Novel terbium(III) sensor based on a new bis-pyrrolidene Schiff’s base
Mohammad Reza Ganjali has a PhD in Analytical Chemistry obtained at Tehran University in 1997. He is currently a Professor of Chemistry at Tehran University, Tehran, Iran. Professor Ganjali’s research work has been mainly focused on the design of new electrochemical sensors. He has published over 110 scientific papers in international journals.
Ahmad Ghesmi was a graduate student at Islamic Azad University working toward his MS under the supervision of Professor Ganjali.
Morteza Hosseini is a graduate student at Tarbiat modarres University working toward his PhD under the supervision of Professor Shamsipur.
Mojtaba Shamsipur has a PhD in Analytical Chemistry obtained at Michigan State University in 1979. He is currently a Professor of Chemistry at Razi University, Kermanshah, Iran. His research work has been mainly focused on the thermodynamic and kinetic studies of macrocyclic ligandcomplexes, and their application in analytical Chemistry. He has published more than 300 scientific papers in international journals.
Masoud Salavati-Niasari has a PhD in Inorganic Chemistry obtained at Tehran University in 2001. He is currently an Assistant Professor at Kashan University, Kashan, Iran, working on the synthesis of organometallic compounds and their application as catalyst.
Here a terbium-selective solvent polymeric membrane sensor based on N,N,-bis(pyrrolidene) benzene-1,2-diamine, poly(vinyl chloride) (PVC), benzylacetate (BA) plasticizer, and an anionic additive is described. At a pH range of 3.5–7.7, this sensor responds to dysprosium in a linear range from 1.0 × 10−5 to 1.0 × 10−1 M, with a slope of 19.8 mV per decade and a detection limit of 7.0 × 10−6 M. It has a fast response time of <20 s in the whole concentration range, and can be used for at least 2 months without any considerable divergences in the potentials. The proposed sensor revealed comparatively good selectivity with respect to common alkali, alkaline earth, transition and heavy metal ions. It was used as an indicator electrode in potentiometric titration of fluoride ions, and in determination of F− ion in some mouth washing solutions preparations.
Keywords: Terbium; Potentiometry; Schiff’s base; PVC; N,N,-bis(pyrrolidene) benzene-1,2-diamine