Cu2+-selective NIR fluorescence sensor based on heptamethine cyanine in aqueous media and its application

Small molecule sensors for the colorimetric detection of Copper(II): A review of the literature from 2010 to 2022

“…11 Sensor #85). Furthermore, 85 showed selectivity for copper(II) in the ratio of 1:10 Cu 2+ :M n+ competition studies, an achievement that only 7 sensors in this review were able to attain [52,55,73,78,101,130,131]. A solid support system was created by fixing sensor 85 (30 µM) to silica, 60-120 and 100-200 mesh.…”

A new bis(rhodamine)-based colorimetric chemosensor for Cu2+

“…The complex association constant (K) calculated through Benesi-Hildebrand equation for Cu 2+ with RD was found to be 4.4 × 10 8 M −2 . The colorimetric strategy toward Cu 2+ was compared with some reported colorimetric methods for detection of Cu 2+ , as listed in Table 1 [20][21][22][23][24][25][26][27][28][29]. Our newly developed colorimetric and absorptive strategy presents a few attractive features, such as a high sensitivity, selectivity, short analysis time.…”

Synthesis of a quinoxaline–hydrazinobenzothiazole based probe—single point detection of Cu2+, Co2+, Ni2+ and Hg2+ ions in real water samples

“…[35][36][37] Fluorescence based sensing is a widely accepted and powerful technique that is used for a variety of environmental, industrial, medical diagnostics, DNA sequencing, forensics, genetic analysis, and biotechnology applications. 38,39 Chromenylium cyanine, 40 styrylbenzothiazolium dye, 41 phenothiazine derivatives, 42,43 1-(1,3-dioxo-1H-inden-2(3H)ylidene)thiosemicarbazide, 44 carbazole-azine, 45 coumarin derivative, 46 oligothiophene-barbituric acid conjugate, 47 pyridine-Schiff base, 48 fluorescein, 49 cyanine dyes, 50,51 quinolone and pyridylaminophenol 52 are a few examples of the reported probes for detection of heavy metal ions like Cu 2+ , Hg 2+ , Co 2+ and Ni 2+ . Many quinoxaline-based probes have been developed recently, due to their excellent optical properties, for instance, indeno-quinoxaline-cyclo-2,4,7-trienol, 53 quinoxaline-ferrocene, 54 quinoxaline-nitrobenzohydrazide, 55 quinoxalinebenzimidazole-ferrocene, 56 and quinoxaline-hydroxybenzimine have been developed for detection of certain heavy metal ions.…”