Two novel pyrazole-based chemosensors: “naked-eye” colorimetric recognition of Ni²⁺ and Al³⁺ in alcohol and aqueous DMF media

Abstract

Sensors Pry-Flu and Pry-R6G were found to have a wide pH range (4–12), good anti-jamming ability and can be reused. And the sensors Pry-Rhy and Pyr-R6G could be quite useful for the fabrication of sensing devices with fast and convenient detection of Ni2+ and Al3+.

A new phenothiazine‐based fluorescence sensor for imaging Hg2+ in living cells

“…The mixed solution was used as the stock solution for the following experiments. [37][38][39] 2.3 | Synthesis of sensor PHE-ad Compounds 1 and 2 were prepared in accordance with the literature. [40] Weigh out the compound 2 (0.205 g, 1.0 mmol) and ethyl mercaptan (0.248 g, 2.0 mmol) in 20 ml of dichloromethane.…”

Shedding Light on Heavy Metal Contamination: Fluorescein-Based Chemosensor for Selective Detection of Hg2+ in Water

“…Fluorescein hydrazones can be obtained with high yields and without generating by-products, making them a valuable asset for optical chemosensors. Recently, numerous fluorescent chemosensors for ions such as Cu 2+ [ 35 , 36 , 37 ], Ni 2+ and Al 3+ [ 38 ], Zn 2+ [ 39 ], Cd 2+ [ 40 ], and Hg 2+ [ 27 , 28 , 29 ] were developed based on fluorescein. As for Hg 2+ chemosensors, 7-hydroxy-4-methylcoumarin-8-carbaldehyde [ 27 ], (pyridin-2-ylmethoxy)-naphthalene-1-carbaldehyde [ 28 ], and thiophene-2-aldehyde [ 29 ] were used as receptors.…”

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

“…In this line, Jiang et al 15 devised a novel coumarin-based colourimetric nickel sensor with high sensitivity and selectivity toward Ni 2+ ion. Yang’s research group reported Two novel pyrazole-based chemosensors that illustrate high sensitivity and selectivity for detecting nickel 16 . Moreover, Zhang and coworkers demonstrated a colorimetric and naked-eye chemosensor based on quinoline and 2-naphthol with detect Ni 2+ in aqueous solution with specific selectivity and high sensitivity 17 .…”