Polyamine Based Ratiometric Fluorescent Chemosensor for Strontium Metal Ion in Aqueous Medium: Application in Tap Water, River Water, and in Oral Care

Abstract

A pyrene-based polymer, 2, was synthesized via one step condensation reaction between pyrene-1-carboxaldehyde and polyamine in methanol. Organic nanoparticles (ONPs) of polymeric compound 2 were developed using a reprecipitation method and investigated for their chemosensor application using fluorescence spectroscopy. Nanoaggregates of polymer compound 2 exhibit efficient and selective chemosensor properties for detection of strontium ions in an aqueous medium, with a detection limit of 9 nM. To analyze the practical utility of the sensor, it was successfully employed to detect the amount of Sr2+ in tap water, river water, and strontium based toothpastes.

Fluorescence Chemosensors for Chemical Warfare Agent Mimic Diethylcyanophosphonate Via Co2+ -Naphthalimide Based Nanoaggregate in Aqueous Medium

“…The formation of nanoaggregate of cobalt complex K1 and K2 were synthesized through re‐precipitation method . In this method the 1 ml THF solution of cobalt complex was dissolved in 99 ml of water and sonicate for 30 minute.…”

Fine Tuning of Polymer-Coated Gold Nanohybrids: Sensor for the Selective Detection of Quinalphos and Device Fabrication for Water Purification

“…Further Cu 2+ was decorated on the surface of Au@ONPs , and the proper formation of Cu­(II)-Au@ONPs was confirmed by UV–vis absorbance, fluorescence emission, Fourier transform infrared (FTIR), and cyclic voltammetry (CV) analytical techniques. The fully characterized Cu­(II)-Au@ONPs were then investigated for their sensing ability for the detection of various analytes, and the selective sensing ability of Cu­(II)-Au@ONPs toward quinalphos was confirmed by the protocol available in the literature. − To prove the utility of the developed sensor under solid state, we then coated Cu­(II)-Au@ONPs nanomaterial onto the silica and found selective sensing of quinalphos through an emissive color change under solid state. The beads were further used to remove quinalphos from water samples through a cartridge-based device.…”

Molecular Tweezers-like Calix[4]arene Based Alkaline Earth Metal Cation (Ca2+, Sr2+, and Ba2+) Chemosensor and Its Imaging in Living Cells and Zebrafish

“…Numerous Ca 2+ chemosensors have been developed since the introduction of small-molecule fluorescent indicators by Tsien et al in the mid-1980s . In contrast, little attention has been paid to Ba 2+ and Sr 2+ chemosensors, especially for Sr 2+ ; only five Sr 2+ sensors have been reported . Moreover, little is known about the simultaneous detection of these three alkaline earth metals (Ca 2+ , Sr 2+ , and Ba 2+ ).…”