Novel & Smart Sensing of Acetate and Hypochlorite Ions With Relay Recognition of Cr Ion With Fluorescence Turn-on: Application in Bio-imaging & Real Sample Analysis.

The receptor-bearing anthraquinone chromophore was synthesized by a simple aldamine condensation reaction, and its anion sensing properties were investigated via colorimetric, UV-vis, photoluminescence, and DFT calculations. The synthesized receptor detects both acetate and hypochlorite ions, where remarkable colorimetric transitions were observed from pink to purple for the acetate ion and pink to blue for the hypochlorite ion. Moreover, in the occurrence of the acetate ion, it shows an admirable answer for the Cr ion, which changes its purple color to pink, while no notable change was observed for other ions.

Anthraquinone Based Sensors for the Selective Detection of Cyanide Ion with Turn on Fluorescence with Logic Gate & Real Sample Applications.

In recent years, there is an increasing interest in finding better and more efficient ways to detect CN ions. Most of the anthraquinone-based probes show less fluorescence This paper presents the design and synthesis of a new anthraquinone based imine probe with good colorimetric sensing property and fluorescent turn on behavior toward CN ion. Herein, we report a receptor with both colorimetric and fluorescent enhancement of cyanide ion in DMSO medium is synthesized.

Triple Action Sensing Behaviour of a Single Receptor for the Detection of Multiple Analytes via Different Approaches.

The thiosemicarbazide based receptor was synthesized with 4-(diethylamino)salicylaldehyde and N- phenyl-thiosemicarbazide by the simple condensation method and the properties were studied under the naked eye, UV-Vis and fluorescence studies etc. The synthesized receptor detects cyanide, cobalt, and mercury in acetonitrile medium. The observed color changes included colourless to yellow for cyanide, colourless to green for cobalt and colourless to yellow for mercury which were seen under naked eye without the aid of any instruments.

Dual mode detection of CN & Cu using fluorene moiety with logic gate, DFT studies and real sample analysis applications.

A simple colorimetric receptor was synthesized by the condensation of 2-amino fluorene with 2-hydroxy-5-nitrobenzaldehyde and its properties were investigated using colorimetric, fluorescence and DFT studies. The sensing mechanism was ascertained by H NMR titration studies. The synthesized receptor showed two-pronged chemosensing properties and exhibited remarkable colorimetric transitions from colorless to yellow in the presence of CN and colorless to green in the presence of Cu in 80:20 acetonitrile/water medium, which could be determined by naked eye observations.

Highly Selective Detection of Cr Ion with Colorimetric & Fluorescent Response Via Chemodosimetric Approach in Aqueous Medium.

So far, very few numbers of chemosensors for Cr ion have been reported. However, the main drawback of reported receptors are the lack of selectivity and other trivalent cations such as Fe, Al and anions like F and OAc frequently interfere with such assays. This paper present the synthesis, characterization & sensor studies of Schiff base containing naphthalene moiety which selectively detect Cr ion by chemodosimetric approach.