A highly selective and reversible water-soluble polymer based-colorimetric chemosensor for rapid detection of Cu²⁺ in pure aqueous solution

Abstract

A novel reversible colorimetric chemosensor based on polyethylene glycol has been developed to detect Cu2+ ions in pure aqueous solution.

Rational design of fluorescent probe for Hg2+ by changing the chemical bond type

“…A Job's plot analysis was also carried out to demonstrate the binding ratio between the probes and Hg 2+ ions and the specic measuring methods were described in ESI. † 31,34 The result of Job plot analysis (Fig. 6) conrmed a 2 : 1 binding ratio between WDFBT and Hg 2+ ions and a 1 : 1 binding ratio between WDFABT and Hg 2+ ion.…”

“…1, the absorption spectra of all the dyes displayed typical characteristic peak of uorene and BT moiety, with an intense bands around 330 nm and a weak band around 460 nm, corresponding to S 0 / S 1 (p-p*) transitions of uorene moiety and intramolecular charge transfer (ICT) state between donor (uorene) and acceptor (BT) in the dyes respectively. 29,31 All the dyes, except WDFABT, exhibited the intense emission at room temperature in solution when excited at their absorption maxima. And the photoluminescence spectra for all the dyes are broad and structureless, which consistent with ICT characteristics for such kind of dyes.…”

“…To further reveal the background chemical process during the detection, detailed studies on the detection mechanism of these two kinds of uorescent probes has been carried out. Firstly, the reversibility of these two kinds of probes have been studied via checking the repeatability of the uorescent signal following the addition of ethylenediaminetetraacetic acid (EDTA), a kind of strong chelate for Hg 2+ ions, 22,31 into the detection solutions. As shown in Fig.…”

Multifunctional peptide‐based fluorescent chemosensor for detection of Hg2+, Cu2+ and S2− ions

“…As one of the most abundant trace metal elements in the human body, Cu 2+ plays a crucial role in metabolic homeostasis, protein regulation, and the development of living organisms . Therefore, selective and sensitive detection of Hg 2+ and Cu 2+ is needed due to fundamental application in environmental and biomedical sciences …”

A Highly Selective Turn-on and Reversible Fluorescent Chemosensor for Al3+ Detection Based on Novel Salicylidene Schiff Base-Terminated PEG in Pure Aqueous Solution

“…Encouraged by these studies and in continuation to the relative work of water-soluble polymer chemosensors in our group [47,48,49,50,51], we have successfully designed and synthesized a salicylidene Schiff base-terminated water-soluble polymer PEGBAB (Scheme 1). PEGBAB exhibited excellent water solubility in 100% water, and could serve as an efficient turn-on fluorescent chemosensor for Al 3+ in pure aqueous solution.…”