Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution

This paper’s emphasis is on the development of a fluorescent chemosensor for Fe<sup>3+</sup> ions in an aqueous solution, using hydrophilic carbon dots (<i>O</i>-CDs). A simple, cost-effective, and environmentally friendly one-step hydrothermal synthesis method was used to sy...

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Autores principales:	Raji Atchudan, Somasundaram Chandra Kishore, Thomas Nesakumar Jebakumar Immanuel Edison, Suguna Perumal, Rajangam Vinodh, Ashok K. Sundramoorthy, Rajendran Suresh Babu, Muthulakshmi Alagan, Yong Rok Lee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	<i>Oxalis corniculata</i> hydrothermal hydrophilic carbon dots fluorescent sensor fluorescence quenching Biochemistry QD415-436
Acceso en línea:	https://doaj.org/article/1c262c46bf474cf58c071e5b3b34dc4a
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spelling	oai:doaj.org-article:1c262c46bf474cf58c071e5b3b34dc4a2021-11-25T17:13:31ZHighly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution10.3390/chemosensors91103012227-9040https://doaj.org/article/1c262c46bf474cf58c071e5b3b34dc4a2021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9040/9/11/301https://doaj.org/toc/2227-9040This paper’s emphasis is on the development of a fluorescent chemosensor for Fe<sup>3+</sup> ions in an aqueous solution, using hydrophilic carbon dots (<i>O</i>-CDs). A simple, cost-effective, and environmentally friendly one-step hydrothermal synthesis method was used to synthesize fluorescent hydrophilic <i>O</i>-CDs from <i>Oxalis corniculata</i> (Family; Oxalidaceae). The graphitic structure and size distribution of the <i>O</i>-CDs was verified by X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy studies. The resulting <i>O</i>-CDs had a near-spherical shape and an adequate degree of graphitization at the core, with an average diameter of 4.5 nm. X-ray photoelectron and Fourier transform infrared spectroscopy methods revealed the presence of several hydrophilic groups (carbonyl, amine, carboxyl, and hydroxyl, along with nitrogen and oxygen-rich molecules) on the surface of <i>O</i>-CDs. The synthesized hydrophilic <i>O</i>-CDs with excitation wavelength-dependent emission fluorescence characteristics showed a high quantum yield of about 20%. Besides this, the hydrophilic <i>O</i>-CDs exhibited a bright and controllable fluorescence with prolonged stability and photo-stability. These fluorescent hydrophilic <i>O</i>-CDs were used as a nanoprobe for the fluorometric identification of Fe<sup>3+</sup> ions in an aqueous solution, with high sensitivity and selectivity. By quenching the blue emission fluorescence of this nanosensor, a highly sensitive Fe<sup>3+</sup> ion in the range of 10–50 µM with a minimum detection limit of 0.73 µM was achieved. In addition, the developed nanosensor can be used to sense intracellular Fe<sup>3+</sup> ions with high biocompatibility and cellular imaging capacity, and it has a lot of potential in biomedical applications.Raji AtchudanSomasundaram Chandra KishoreThomas Nesakumar Jebakumar Immanuel EdisonSuguna PerumalRajangam VinodhAshok K. SundramoorthyRajendran Suresh BabuMuthulakshmi AlaganYong Rok LeeMDPI AGarticle<i>Oxalis corniculata</i>hydrothermalhydrophilic carbon dotsfluorescent sensorfluorescence quenchingBiochemistryQD415-436ENChemosensors, Vol 9, Iss 301, p 301 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	<i>Oxalis corniculata</i> hydrothermal hydrophilic carbon dots fluorescent sensor fluorescence quenching Biochemistry QD415-436
spellingShingle	<i>Oxalis corniculata</i> hydrothermal hydrophilic carbon dots fluorescent sensor fluorescence quenching Biochemistry QD415-436 Raji Atchudan Somasundaram Chandra Kishore Thomas Nesakumar Jebakumar Immanuel Edison Suguna Perumal Rajangam Vinodh Ashok K. Sundramoorthy Rajendran Suresh Babu Muthulakshmi Alagan Yong Rok Lee Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution
description	This paper’s emphasis is on the development of a fluorescent chemosensor for Fe<sup>3+</sup> ions in an aqueous solution, using hydrophilic carbon dots (<i>O</i>-CDs). A simple, cost-effective, and environmentally friendly one-step hydrothermal synthesis method was used to synthesize fluorescent hydrophilic <i>O</i>-CDs from <i>Oxalis corniculata</i> (Family; Oxalidaceae). The graphitic structure and size distribution of the <i>O</i>-CDs was verified by X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy studies. The resulting <i>O</i>-CDs had a near-spherical shape and an adequate degree of graphitization at the core, with an average diameter of 4.5 nm. X-ray photoelectron and Fourier transform infrared spectroscopy methods revealed the presence of several hydrophilic groups (carbonyl, amine, carboxyl, and hydroxyl, along with nitrogen and oxygen-rich molecules) on the surface of <i>O</i>-CDs. The synthesized hydrophilic <i>O</i>-CDs with excitation wavelength-dependent emission fluorescence characteristics showed a high quantum yield of about 20%. Besides this, the hydrophilic <i>O</i>-CDs exhibited a bright and controllable fluorescence with prolonged stability and photo-stability. These fluorescent hydrophilic <i>O</i>-CDs were used as a nanoprobe for the fluorometric identification of Fe<sup>3+</sup> ions in an aqueous solution, with high sensitivity and selectivity. By quenching the blue emission fluorescence of this nanosensor, a highly sensitive Fe<sup>3+</sup> ion in the range of 10–50 µM with a minimum detection limit of 0.73 µM was achieved. In addition, the developed nanosensor can be used to sense intracellular Fe<sup>3+</sup> ions with high biocompatibility and cellular imaging capacity, and it has a lot of potential in biomedical applications.
format	article
author	Raji Atchudan Somasundaram Chandra Kishore Thomas Nesakumar Jebakumar Immanuel Edison Suguna Perumal Rajangam Vinodh Ashok K. Sundramoorthy Rajendran Suresh Babu Muthulakshmi Alagan Yong Rok Lee
author_facet	Raji Atchudan Somasundaram Chandra Kishore Thomas Nesakumar Jebakumar Immanuel Edison Suguna Perumal Rajangam Vinodh Ashok K. Sundramoorthy Rajendran Suresh Babu Muthulakshmi Alagan Yong Rok Lee
author_sort	Raji Atchudan
title	Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution
title_short	Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution
title_full	Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution
title_fullStr	Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution
title_full_unstemmed	Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution
title_sort	highly fluorescent carbon dots as a potential fluorescence probe for selective sensing of ferric ions in aqueous solution
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1c262c46bf474cf58c071e5b3b34dc4a
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Highly Fluorescent Carbon Dots as a Potential Fluorescence Probe for Selective Sensing of Ferric Ions in Aqueous Solution

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