Development of chemosensor for Sr²⁺using organic nanoparticles: application of sensor in product analysis for oral care

Abstract

A new series of compounds has been developed for the recognition of metal ions and it was found that the position of substituent in the organic compound proved to be the deciding factor for the development of a chemosensor. Reprecipitation method was used to develop organic nanoparticles (ONPs) in aqueous medium and the suspension of ONP in aqueous medium remained stable for one month. These ONPs were studied for their recognition abilities using fluorescence spectroscopy and only ONPs of compound 1 resulted in a sensor for Sr(2+) and the sensor activities were found to be unaffected by the presence of any other cation. The sensor was successfully used to investigate the level of Sr(2+) in an oral gel, as well as toothpastes used to cure sensitive teeth.

Organic Nanoparticles for Visual Detection of Spermidine and Spermine in Vapors and Aqueous Phase

“…It seems that the enhancement in fluorescence emission in the DMF/H 2 O (1:99, v/v) solvent system is due to the AIEE (aggregation induced enhanced emission) phenomenon. , It was previously studied by Tang et al that the water enriched solvent system triggers the formation of organic nanoparticles, and due to molecular rigidity, the fluorescence emission gets enhanced through the restriction on nonradiative decay, which otherwise prevailed in pure DMF. The development of organic nanoparticles (ONPs) involves the dispersion of organic molecules dissolved in rich solvent (organic solvent) into poor solvent (water). − Miscibility of both solvents generates rapid crystallization significantly due to the insolubility of organic molecules in water . Here, we slowly injected the organic receptor 1·H 4 dissolved in DMF (1 mM) into 100 mL of doubly distilled water, and the mixture was kept for sonication, which ensures the homogeneity of the nanoparticle solution.…”

“…34−36 Miscibility of both solvents generates rapid crystallization significantly due to the insolubility of organic molecules in water. 37 Here, we slowly injected the organic receptor 1•H 4 dissolved in DMF (1 mM) into 100 mL of doubly distilled water, and the mixture was kept for sonication, which ensures the homogeneity of the nanoparticle solution. Different ratios of solvent and water were used during the formation of ONPs; however, the DMF/ H 2 O (1:99, v/v) solvent system has provided the best size range.…”

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

“…Taking the cognizance of the reported water-soluble optical sensors and their application in the field of metal recognition in aqueous media, fluorescent organic nanoparticles of the polymer were developed and utilized for the detection of strontium in water. To the best of our knowledge, rarely any reports in the literature are available that describe the employment of fluorescent chemosensors for Sr 2+ ion detection in water . Furthermore, the detection limit of the present sensor is lowest among all the previously reported sensors for the Sr 2+ ion. − In present work, our goal is to develop a fluorescent probe which detects Sr 2+ ions in water and further investigate the practical utility of this sensor toward the detection of Sr 2+ in tap water, river water, and in toothpastes used in oral care.…”

Optical probes for the detection of protons, and alkali and alkaline earth metal cations

“…Singh et al encapsulated naphthalene-phenol hybrids 87-89 with organic nanoparticles (ONs) for the selective detection of Sr 2+ in aqueous medium. 111 The facile preparation of these ONs was a contributing factor in their choice by the authors. Following a re-precipitation method that included the injection of a small volume of 87-89 into a large volume of a non-solvent, stable ONs were produced.…”