A highly efficient PET switch off/on ditopic fluorescence receptor based on calix[4]arene 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

Email: pinkeshsutariya@gmail.com

Abstract:

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  calix[4]arene 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 [4]arene, ditopic PET Fluorescence probe, Cd²⁺   and Sr²⁺   recognition

References:

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