2,6-Bis(E)-4-Methylbenzylidine)-Cyclohexan-1-One As A Fluorescent-On Sensor For Ultra-Selective Detection Of Chromium Ion In Aqueous Media

Abstract In current decade, curcumin and its analogues have been broadly used in biological field. However, there are relatively fewer studies regarding their fluorescence based applications for chromium ion sensing in water samples. This article, hereby, reports the synthesis, FTIR and 1H-NMR spectroscopic analyses and optical description of 2,6-bis(E)-4-methylbenzylidine)-cyclohexan-1-one (sensor C), as a fluorescence-on sensor for trace level sensing of chromium. The sensor C exhibited an ultra-selective response to chromium among the tested heavy metal ions. Different parameters were optimized like pH, effect of concentration of sensor C, metal ion and contact time. The binding stoichiometry of C :Cr3+ was calculated to be 2:1 (Job’s plot) with a significantly low detection limit of 2.3×10− 9 M. Sensor C were practically employed for detection of chromium in spiked water samples.