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Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment
BACKGROUND: Carbon dots (C-dots) are photoluminescent nanoparticles with less than 10 nm in size. Today, many studies are performed to exploit the photoluminescence (PL) property of carbon dots, and our focus in this study is to estimate the dipole moment of carbon dots. For reaching our aims, C-dot...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer International Publishing
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8587513/ https://www.ncbi.nlm.nih.gov/pubmed/34563252 http://dx.doi.org/10.1186/s13065-021-00779-6 |
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author | Mohammad-Jafarieh, Parisa Akbarzadeh, Abolfazl Salamat-Ahangari, Rahman Pourhassan-Moghaddam, Mohammad Jamshidi-Ghaleh, Kazem |
author_facet | Mohammad-Jafarieh, Parisa Akbarzadeh, Abolfazl Salamat-Ahangari, Rahman Pourhassan-Moghaddam, Mohammad Jamshidi-Ghaleh, Kazem |
author_sort | Mohammad-Jafarieh, Parisa |
collection | PubMed |
description | BACKGROUND: Carbon dots (C-dots) are photoluminescent nanoparticles with less than 10 nm in size. Today, many studies are performed to exploit the photoluminescence (PL) property of carbon dots, and our focus in this study is to estimate the dipole moment of carbon dots. For reaching our aims, C-dots were synthesized and dissolved in the different solvents. RESULTS: Carbon dots with intense photoluminescence properties have been synthesized by a one-step hydrothermal method from a carbon bio-source. In this research, we report on the effect of aprotic solvents on absorption and fluorescence spectra and dipole moments of C-dots dispersed in a range of many aprotic solvents with various polarity and dielectric constant at room temperature. The change in the value of dipole moment was estimated by using the Stokes shifts. The difference between the dipole moment of the excited state and the ground state was shown using an extended form of Lippert equations by Kawski and co-workers. CONCLUSIONS: The values found for μ(g) = 1.077 D, and μ(e) = 3.157 D, as well as the change in the dipole moments. The results showed that the dipole moment of the excited state is more than the ground state, indicating a high density and redistribution of electrons in the excited state. Finally, the quantum yield of C-dots in the eclectic aprotic solvents was communicated and discussed. |
format | Online Article Text |
id | pubmed-8587513 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Springer International Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-85875132021-11-15 Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment Mohammad-Jafarieh, Parisa Akbarzadeh, Abolfazl Salamat-Ahangari, Rahman Pourhassan-Moghaddam, Mohammad Jamshidi-Ghaleh, Kazem BMC Chem Research BACKGROUND: Carbon dots (C-dots) are photoluminescent nanoparticles with less than 10 nm in size. Today, many studies are performed to exploit the photoluminescence (PL) property of carbon dots, and our focus in this study is to estimate the dipole moment of carbon dots. For reaching our aims, C-dots were synthesized and dissolved in the different solvents. RESULTS: Carbon dots with intense photoluminescence properties have been synthesized by a one-step hydrothermal method from a carbon bio-source. In this research, we report on the effect of aprotic solvents on absorption and fluorescence spectra and dipole moments of C-dots dispersed in a range of many aprotic solvents with various polarity and dielectric constant at room temperature. The change in the value of dipole moment was estimated by using the Stokes shifts. The difference between the dipole moment of the excited state and the ground state was shown using an extended form of Lippert equations by Kawski and co-workers. CONCLUSIONS: The values found for μ(g) = 1.077 D, and μ(e) = 3.157 D, as well as the change in the dipole moments. The results showed that the dipole moment of the excited state is more than the ground state, indicating a high density and redistribution of electrons in the excited state. Finally, the quantum yield of C-dots in the eclectic aprotic solvents was communicated and discussed. Springer International Publishing 2021-09-25 /pmc/articles/PMC8587513/ /pubmed/34563252 http://dx.doi.org/10.1186/s13065-021-00779-6 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Mohammad-Jafarieh, Parisa Akbarzadeh, Abolfazl Salamat-Ahangari, Rahman Pourhassan-Moghaddam, Mohammad Jamshidi-Ghaleh, Kazem Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
title | Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
title_full | Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
title_fullStr | Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
title_full_unstemmed | Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
title_short | Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
title_sort | solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8587513/ https://www.ncbi.nlm.nih.gov/pubmed/34563252 http://dx.doi.org/10.1186/s13065-021-00779-6 |
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