A highly selective chemosensor for Cu2+ and Al3+ in two different ways based on Salicylaldehyde Schiff

Synthesis of new colori/fluorimetric chemosensor for selective sensing of biologically important Fe3+, Cu2+ and Zn2+ metal ions

“…Several class of organic molecular chemosensors that are having strong metal ion interacting functional group such as crown ethers, pyridines and quinolines have been synthesized and explored for metal ions sensing [24,25]. The ease of synthesis coupled with synthetic tailorability, good biological activities, strong photophysical properties and coordination ability with metal ions made Schiff bases as one of the most widely explored molecular chemosensors for selective sensing of metal ions [26][27][28][29][30][31]. For example, Salen type ligands have widely been used as fluorescence chemosensors for selective detection of various cations, such as Zn 2+ [27], Cu 2+ [29], Al 3+ [28] and Pt 2+ [30].…”

“…The ease of synthesis coupled with synthetic tailorability, good biological activities, strong photophysical properties and coordination ability with metal ions made Schiff bases as one of the most widely explored molecular chemosensors for selective sensing of metal ions [26][27][28][29][30][31]. For example, Salen type ligands have widely been used as fluorescence chemosensors for selective detection of various cations, such as Zn 2+ [27], Cu 2+ [29], Al 3+ [28] and Pt 2+ [30]. Recently, we have reported cyano substituted Schiff bases for selective colorimetric sensing of different metal ions [32].…”

“…Recently, we have reported cyano substituted Schiff bases for selective colorimetric sensing of different metal ions [32]. However, a single chemosensor that exhibits multiple metal ions sensing has still been rarely reported [29,[33][34][35][36].…”

Design of a novel coumarin-based multifunctional fluorescent probe for Zn2+/Cu2+/S2− in aqueous solution

“…Whereas, overloading conditions, they exhibit toxicity in that they cause neurodegenerative diseases such as Alzheimer's, Parkinson's [9][10][11][12], Menkes and familial amyotropic lateral sclerosis [13][14][15]. And in general, the normal Zn 2+ content of blood plasma is 12 to 16 mM in the body [16], the maximum amount of Cu 2+ in drinking water is limited to 20 μM which is restricted by the Environmental Protection Agency (EPA) of the U.S. regulations [17][18][19]. Sulfide, as a traditional toxic anion, has many applicable utilities such as manufacture of sulfur and sulfuric acid, dyes and cosmetics [20][21][22].…”

A Novel Fluorescent Optode for Recognition of Zn2+ ion Based on N,N’-bis-(1-Hydroxypheylimine)2,5-Thiophenedicarobxaldehyde (HPTD) Schiff Base

“…The development of selective and sensitive fluorescent chemosensors for transition and post-transition metal ions, based on ion-induced changes in fluorescence, are particularly attractive because of their simplicity, high sensitivity, and instantaneous response [1][2][3]. Zinc is one of the most abundant transition metals in human body.…”