Synthesis, characterization and UV-visible study of schiff base-acetylene functionalized organosilatrane receptor for the dual detection of Zn2+ and Co2+ ions

The present article describes the synthesis of Schiff base-acetylene functionalized organosilatranes (6a-6e) and their characterization by H-1 and C-13 NMR spectroscopy and ESI-QTOF mass spectrometry. The UV-visible study of the organosilatrane 6a unveiled their high selectivity towards the recognition of Zn2+ and Co2+ ions without exhibiting any significant interference from other competitive metal ions. The calculated value of association constant with 6a for Zn2+ and Co2+ ions was 0.11 x 10(6) M-1 and 0.24 x 10(6) M-1 and the limit of detection was 0.28 x 10(-6) M and 0.82 x 10(-6) M respectively. Furthermore, DFT calculations were performed to get an insight into the interacting behaviour of sensor 6a towards Zn2+ and Co2+ ions.

Automated summary

The study describes the synthesis and characterization of Schiff base-acetylene functionalized organosilatranes and their high selectivity towards Zn2+ and Co2+ ions. Calculated association constants and limits of detection were provided, along with DFT calculations to understand the interacting behavior of the sensor towards the ions.