Naked eye instant reversible sensing of Cu²⁺and its in situ imaging in live brine shrimp Artemia

Abstract

A Cu(2+)-specific colorimetric reversible fluorescent receptor was designed and synthesized which showed a naked eye observable colour change from colourless to pink on addition of an aqueous buffer (pH 7.4) solution of 30 ppb Cu(2+). Short response time (≤5 s) and low detection limit (nearly 3 ppb) make suitable as a reliable "dip-in" open eye sensor for Cu(2+). Bio-imaging application in live brine shrimp Artemia enabled to detect Cu(2+) at as low as 10 ppb exposure.

A simple hydrazone as a multianalyte (Cu2+, Al3+, Zn2+) sensor at different pH values and the resultant Al3+ complex as a sensor for F−

“…S4, ESI †), which is relatively wide when compared to some rhodamine based Cu 2+ ion chemosensors. 34,35 Fluorescence spectroscopic studies of 1 with metal ions in buffered CH 3 CN/HEPES solution (10 mM, 1/1, v/v) at pH 6.0…”

Fabrication of a Cu(II)-Selective Electrode in the Polyvinyl Chloride Matrix Utilizing Mechanochemically Synthesized Rhodamine 6g as an Ionophore

“…Synthetic procedure for the preparation of the copper-specific ionophore “L” has been reported earlier from our group. 47 In that method, we performed conventional solution-refluxing process, that is, high reaction temperature, and bulk solvent for the synthesis of “L” has been used.…”

Visualizing Zn2+ in Living Whole Organism Artemia by a Natural Fluorimetric Intermediate Siderophore

“…To assess the performance of H 2 L for bio‐imaging of Zn 2+ in biological milieu, live whole organism Artemia (a marine crustacean) was used (Figure ) instead of the default practice of working in cultured cell lines ( in‐vitro ). Because of their small body size, tiny life span, easy to hatch, and minimum skill needed to nurture has developed the brine shrimp Artemia as a model for studying the increased bio‐accumulation of different heavy metal ions ,,. Control experiments with live marine crustacean exposed to the aqueous solution of H 2 L did not show any bright fluorescence image (control image, Figure a), while blue fluorescence image (Figure b) was observed for the brine shrimps exposed to Zn 2+ .…”