A highly efficient PET switch off/on ditopic fluorescence receptor based on calixarene for selective recognition of Cd2+ and Sr2+
Pinkesh G Sutariya, Alok Pandya and Shobhana K Menon
Department of Chemistry, School of sciences,Gujarat University, Navrangpura
During the last decades, chemical sensing, which conglomerates a recognition functional moiety with optical transduction, has expected much attention as an efficient analytical technique for the revealing of particular species1. Radioactive metal like Sr2+ is a major factor of a “dirt bomb”. It is well recognized that cadmium is one of the most imperative resources and is extensively used in many arenas, such as nickel–cadmium batteries, pigments, semiconducting quantum dots and rods. Thus, it is desirable to develop some sensors that can selectively detect and monitor Cd2+ as well as Sr2+ from the environment. A novel PET based substituted calixarene fluroionophore has been synthesized and used as selective recognition of Cd2+ and Sr2+ by emission spectra. The synthesised receptor was characterised by which was characterized by elemental analysis as well as different spectroscopic method like FT-IR, ESI-MASS, 1H NMR and 13C NMR. The detection limit of synthesized receptor was found to be 0.94 pM for Cd2+ and 1.04 pM for Sr2+. Moreover, this probe has been applied for recognition Cd2+ and Sr2+ from waste water.
Keywords: Lower rim calyx arene, ditopic PET Fluorescence probe, Cd2+ and Sr2+ recognition
1. P. G. Sutariya, N. R. Modi, A. Pandya, B. K. Joshi, K. V. Joshi and S. K. Menon, Analyst, 2012, 137, 5491.
2. P.G. Sutariya, A. Pandya, V.A. Rana, S.K. Menon, Liq. Cryst., DOI:10.1080/02678292.2012.749305