Novel probe based on rhodamine B and quinoline as a naked-eye colorimetric probe for dual detection of nickel and hypochlorite ions

Abstract

This work demonstrates the design and straightforward syntheses of several novel probe-based on rhodamine B and 2-mercaptoquinoline-3-carbaldehydes as a naked-eye colorimetric probe, indicating a sensitive and selective recognition towards nickel (II) with a limit of detection 0.30 μmol L−1 (0.02 mg L−1). Further, by employing the oxidation property of hypochlorite (OCl−), this novel probe parallelly has been deployed to detect hypochlorite in laboratory conditions with a limit of detection of 0.19 μmol mL−1 and in living cells. Regarded to negligible cell toxicity toward mammalian cells, this probe has the potential to determine these analytes in in-vivo investigation and foodstuff samples.

Facile synthesis of magnetic intelligent sensors for the pH-sensitive controlled capture of Cr(vi)

“…19 D. Sahu et al 20 developed a Ag/r-GO@RhB nanosensor for the detection of Hg 2+ in aqueous media, with a low cost, high efficiency, and small detection limit of 2 nM at optimal pH and contact time. S. E. Hooshmand et al 21 designed a novel naked-eye colorimetric probe based on rhodamine B for detecting nickel ions. When the probe met the target ions, the color changed from colorless to pink, and the detection limit was 0.3 mmol mL −1 .…”