A highly selective fluorescence turn-on chemosensor for Zn²⁺, and its application in live cell imaging, and as a colorimetric sensor for Co²⁺: experimental and TD-DFT calculations

Abstract

A highly sensitive quinoline based “dual” chemosensor used for fluorometric detection of Zn2+, live-cell imaging, and colorimetric detection of Co2+.

A New Fluorescent Chemosensor for Cobalt(II) Ions in Living Cells Based on 1,8-Naphthalimide

“…This is lower than the recommended value for the U.S. (United States Environmental Protection Agency, secondary drinking water regulation) and Australia (National Health and Medical Research Council). Notably, the LOD is quite low as compared to the data reported regarding to other organic chemosensors for sensing of Co 2+ listed in Table 1 [16,17,18,19,20,21,22,23,24,25]. The main analytical characteristics of the proposed chemosensor for the determination of Co 2+ were compared with those of some previously reported fluorescent chemosensors, including coumarin, diethylenetriamine, oxadiazole, dinitrobenzene-2,2-dipycolylamine, carboxamide, pyrimidine–pyridine and pyrazine–rhodamine.…”

“…Due to the limitations of these methods, the development of chemosensors towards Co 2+ ions with high sensitivity and easy operation is still a significant work for researchers. Colorimetric methods for Co 2+ detection which can conveniently and easily monitor target ions with the naked eye have attracted considerable attention [16,17,18,19,20,21,22,23,24,25]. Additionally, a fluorescence probe has also evolved to be a promising candidate for detecting Co 2+ by virtue of its high specificity towards target substances, great simplicity and high-speed analysis during the process of experiments [26,27,28,29].…”

Benzothiazole azo derivatives as colorimetric probes for optical recognition of different metal ions and anions

“…[ 29 ] Notably, the LOD is quite low as compared with the data reported regarding to other organic chemosensors for sensing of Co 2+ and Cu 2+ as listed in Table 5. [ 30–38,55 ]…”

Construction of a Quinoline‐based Sequential Functioning Chromogenic Sensor for Copper(II) Ion and Biothiols: Its Application to Test Strips

“…18,[40][41][42] Among them, quinoline derivatives as a chromophore have been frequently used to construct sensors exhibiting unique optical variations to particular metal ions. 43,44 Besides, the composition of the sensor by using two quinoline derivatives may have a higher binding ability to metal ions than one quinoline. 45 Therefore, we envisioned that a new symmetric compound with two quinoline derivatives could be a great chelator for metal ion like Cu 2+ by exhibiting a unique color change.…”

“…Heterocyclic compounds such as quinoline, pyrrole, and imidazole including electron‐donor N atoms are well known as good chelators for a wide range of metal ions 18,40–42 . Among them, quinoline derivatives as a chromophore have been frequently used to construct sensors exhibiting unique optical variations to particular metal ions 43,44 . Besides, the composition of the sensor by using two quinoline derivatives may have a higher binding ability to metal ions than one quinoline 45 .…”