A Cu2+-Selective Probe Based on Phenanthro-Imidazole Derivative

Abstract

A novel fluorescent Probe 1, based on phenanthro-imidazole has been developed as an efficient chemosensor for the trace detection of copper ions (Cu2+). Probe 1 demonstrated sensitive fluorescence quenching upon binding with Cu2+ through 1:1 stoichiometric chelation. The detection limit for Cu2+ ions was projected through linear quenching fitting to be as low as 2.77 × 10−8 M (or 1.77 ppb). The sensing response was highly selective towards Cu2+ with minimal influence from other common metal ions, facilitating the practical application of Probe 1 in trace detection.

Cu2+ sensing via noncovalent complexes of fluorescent whitening agents and imidazole‐based polymeric dye transfer inhibitors

“…The performance of sensor A (FWA‐DTI complex) is comparable with other reported fluorescence‐based probes for Cu 2+ (Table ). Unlike many probes reported in the literature, the approach introduced herein produces 100% water‐soluble Cu 2+ sensors. The main advantage of the approach described in this work however, is its simplicity; it enables sensor assembly via single‐step mixing of inexpensive commercial materials, which circumvents the multistep synthesis and purification involved in the production of current Cu 2+ sensors.…”

A Reversible Colorimetric and Fluorescence “Turn-Off” Chemosensor for Detection of Cu2+ and Its Application in Living Cell Imaging

“…However, there are plenty of shortcomings in these methods because they are usually complicated, time-consuming, and costly. In recent years, increased attention has been given to the development of colorimetric and fluorimetric methods, which exhibit advantages of low cost, simplicity, convenience, and high sensitivity [9,10,11]. The colorimetric method allows simple naked-eye detection without the use of any expensive equipment, and the fluorimetric method has the ability of real-time analysis and biological imaging [12].…”

A New pH-Dependent Macrocyclic Rhodamine B-Based Fluorescent Probe for Copper Detection in White Wine

“…The fluorescence emission spectrum is affected with an energy-transfer mechanism for quenching. The quenching interaction appears as the copper(II)–macrocycle complex is formed near the Rhodamine B [38,39,40].…”