Efficient electro-chemical sensor for sensitive Cd2+ detection based on novel in-situ synthesized hydrazonoyl bromide (HB)

In this approach, an efficient methodology for synthesis of a novel hydrazonoyl bromide (HB) containing trifluoromethyl moiety by using fluorine-containing building blocks was achieved. The synthesized HB was fully characterized with various methods such as Infra-red spectroscopy (IR), Thin layer chromatography (TLC), H-1 NMR, F-19-NMR, C-13 NMR, and elemental analyses. In-situ potential examination as reliable technique, an electrochemical sensor based on prepared HB was used for the selective detection of environmental hazardous heavy metal ion, Cd2+. The fabricated sensor was found to perform linearly over the concentration range (linear dynamic range) of 0.1 nM similar to 0.01 mM of Cd2+ ion and the sensitivity (51.12 mu A mu M(-1)cm(-2)) and detection limit (53.85 +/- 2.69 pM) of the proposed sensor were estimated from the slope of calibration curve (plot of current versus concentration). Furthermore, the proposed Cd2+ ion sensor was exhibited good analytical performances such reproducibility, stability in phosphate buffer medium and efficiency to detect Cd2+ ion in real environmental samples. This progress in the field of metal ion sensor development might be a cost effective and efficient method in the detection of unsafe and hazardous ions for the safety of environmental and ecological fields in broad scales. (C) 2020 Elsevier B.V. All rights reserved.