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7010694 
Journal Article 
4-Functionalized terpyridine derivative as dual responsive chemosensor for biologically important inorganic cations and fluoride anion 
Amuthakala, S; Selvan, DSA; Rahiman, AK; , 
2020 
Yes 
Journal of the Iranian Chemical Society
ISSN: 1735-207X
EISSN: 1735-2428 
SPRINGER 
NEW YORK 
17 
1237-1248 
A dual responsive sensor molecule, 2-(4-(2,2 ':6 ',2 ''-terpyridin)-4 '-yl-phenyl)-N-methyl-3-thiosemicarbazone, has been synthesized and characterized using standard analytical and spectroscopic techniques. The dual binding properties of the sensor molecule were investigated using biologically important inorganic cations (Mn2+, Fe2+, Ni2+, Cu2+, Zn2+, Pb2+ and Hg2+) and anions (F over bar , Cl over bar , Br over bar , I over bar , HSO4 over bar and H2PO4 over bar ). The sensor molecule is equipped with analyte coordinating donor sites displaying charge transfer controlled spectroscopic properties and shows analyte-receptor interactions. Sensing mechanism involving host-guest interactions was confirmed by spectral and cyclic voltammetry techniques. The receptor shows colorimetric signalling in solution for cations such as Mn2+, Ni2+ and Cu2+ as evidenced by instant colour changes even at 2 mu L aliquots of manganese and copper cations, and 4 mu L aliquot for nickel cation, among the studied cations. Fluoride anion was detected by naked eye even at 2 mu L of aliquot, signalled by the development of yellowish brown colour, through hydrogen bonding, deprotonation of N-H fragment and formation of HF2 over bar . Thus, the receptor shows dual sensing ability towards selected cations and F over bar anion. Further, paper strip experiments on receptor were also employed for the detection of cations and fluoride anion in solution. 
Terpyridine derivative; Bifunctional chemosensor; Colorimetric sensor; Absorption titration; Sensing mechanism