The Novel Poly(azomethine-urethane): Synthesis, Morphological Properties and Application as a Fluorescent Probe for Detection of Zn2+ Ions

Abstract

In this paper reports synthesis of a new kind of Schiff base-polyurethane containing azomethine linkage and uses of this poly(azomethine-urethane) as fluorescence probe for determination of transition metal ions in aqueous medium. The spectroscopic behavior of poly(azomethineurethane) toward metal ions has been investigated by the fluorescence method and photoluminescence (PL) characteristics of compounds were investigated in different polarity solvents including MeOH, tetrahydrofurane (THF) and dimethylformamide (DMF). PL measurements showed that both Schiff base and polymer have higher emission intensity and Stoke's shift value (Dk ST ) in THF solution than DMF and MeOH. The proposed sensor was found to show good selectivity to Zn 2? ion over other metal ions in THF/deionized water solution (1:2, v:v). Notably, the proposed sensor could clearly distinguish Zn 2? from Cd 2? . Detection limit of the proposed sensor was also determined as 3.06 9 10 -4 mol L -1 .

Synthesis, characterization of Schiff base metal complexes and their biological investigation

“…[2,3] The formation of stable complexes with metal ions is due to nitrogen lone pair of electrons of azomethine (−N = CH) bonding in their structure. [4,5] These stable complexes play a prominent role in many important biological processes, supramolecular chemistry, bioinorganic and molecular magnetism. [6,7] Imine complexes have diversity of biological properties, including antitumor, antiviral, antifungal, and antibacterial activity.…”

“…Schiff bases are important due to their ability to stabilize metal ions of various oxidation states, participation in numerous catalytic and industrial applications and broad spectrum biological activities . The formation of stable complexes with metal ions is due to nitrogen lone pair of electrons of azomethine (−N = CH) bonding in their structure . These stable complexes play a prominent role in many important biological processes, supramolecular chemistry, bioinorganic and molecular magnetism .…”

An electrochemical detection of cadmium (II) and lead (II) ions using a polymer-modified electrode with a Schiff base by square wave voltammetry

“…Globally, pollution of the planet is one of most vital problems because of the widespread and critical damage such pollution can cause [1][2][3]. Heavy metal ions like Cu, Hg, Zn, Pb, Ni, and Cd are considered toxic even in extremely low concentrations [3]. These metal ions can cause signi cant harm and damage in human organs such as the kidneys, liver, brain and the lungs and respiratory system [4].…”

“…Modi ed electrodes in electroanalytical chemistry offer an easy and appropriate technology for examining the reactions of various substrates, and inorganic, organic, and biological species [3,22]. The chemically modi ed polymer electrode can be prepared and controlled using electrochemical techniques that allow for the generation of a thin synthetic polymer lm [23].…”

2,4-Diamino-6-Hydroxypyrimidine Based Poly(azomethine-Urethane): Synthesis and Application as a Fluorescent Probe for Detection of Cu2+ in Aqueous Solution

“…Until now, a lot of Schiff base [19] and polymer nanoparticle [20,21] based fluorescence sensor for detection Cu 2+ in aqueous media were developed and reported to literature. On the other hand, to the best of our knowledge, there are only three paper in literature about poly(azomethine-urethane)-based fluorescent sensor detection of Mn 2+ [22], Cd 2+ [23] and Zn 2+ [24] in aqueous medium. Moreover, the proposed poly(azomethine-urethane)-based fluorescence sensor for detection of Cu 2+ has higher detection limit of than these poly(azomethine-urethane)-based sensor.…”