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Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system
Carbon dots (CDs) as the advancing fluorescent carbon nanomaterial have superior potential and prospective. However, the ambiguous photoluminescence (PL) mechanism and intricate structure-function relationship become the greatest hindrances in the development and applications of CDs. Herein, red emi...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9561683/ https://www.ncbi.nlm.nih.gov/pubmed/36229434 http://dx.doi.org/10.1038/s41377-022-00984-5 |
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author | Li, Pengfei Xue, Shanshan Sun, Lu Zong, Xupeng An, Li Qu, Dan Wang, Xiayan Sun, Zaicheng |
author_facet | Li, Pengfei Xue, Shanshan Sun, Lu Zong, Xupeng An, Li Qu, Dan Wang, Xiayan Sun, Zaicheng |
author_sort | Li, Pengfei |
collection | PubMed |
description | Carbon dots (CDs) as the advancing fluorescent carbon nanomaterial have superior potential and prospective. However, the ambiguous photoluminescence (PL) mechanism and intricate structure-function relationship become the greatest hindrances in the development and applications of CDs. Herein, red emissive CDs were synthesized in high yield from o-phenylenediamine (oPD) and catechol (CAT). The PL mechanism of the CDs is considered as the molecular state fluorophores because 5,14-dihydroquinoxalino[2,3-b] phenazine (DHQP) is separated and exhibits the same PL properties and behavior as the CDs. These include the peak position and shape of the PL emission and PL excitation and the emission dependence on pH and solvent polarity. Both of them display close PL lifetime decays. Based on these, we deduce that DHQP is the fluorophore of the red emissive CDs and the PL mechanism of CDs is similar to DHQP. During the PL emission of CDs, the electron of the molecule state can transfer to CDs. The formation process of DHQP is further confirmed by the reaction intermediates (phthalazine, dimers) and oPD. These findings provide insights into the PL mechanism of this type of CDs and may guide the further development of tunable CDs for tailored properties. |
format | Online Article Text |
id | pubmed-9561683 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-95616832022-10-15 Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system Li, Pengfei Xue, Shanshan Sun, Lu Zong, Xupeng An, Li Qu, Dan Wang, Xiayan Sun, Zaicheng Light Sci Appl Article Carbon dots (CDs) as the advancing fluorescent carbon nanomaterial have superior potential and prospective. However, the ambiguous photoluminescence (PL) mechanism and intricate structure-function relationship become the greatest hindrances in the development and applications of CDs. Herein, red emissive CDs were synthesized in high yield from o-phenylenediamine (oPD) and catechol (CAT). The PL mechanism of the CDs is considered as the molecular state fluorophores because 5,14-dihydroquinoxalino[2,3-b] phenazine (DHQP) is separated and exhibits the same PL properties and behavior as the CDs. These include the peak position and shape of the PL emission and PL excitation and the emission dependence on pH and solvent polarity. Both of them display close PL lifetime decays. Based on these, we deduce that DHQP is the fluorophore of the red emissive CDs and the PL mechanism of CDs is similar to DHQP. During the PL emission of CDs, the electron of the molecule state can transfer to CDs. The formation process of DHQP is further confirmed by the reaction intermediates (phthalazine, dimers) and oPD. These findings provide insights into the PL mechanism of this type of CDs and may guide the further development of tunable CDs for tailored properties. Nature Publishing Group UK 2022-10-13 /pmc/articles/PMC9561683/ /pubmed/36229434 http://dx.doi.org/10.1038/s41377-022-00984-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Li, Pengfei Xue, Shanshan Sun, Lu Zong, Xupeng An, Li Qu, Dan Wang, Xiayan Sun, Zaicheng Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
title | Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
title_full | Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
title_fullStr | Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
title_full_unstemmed | Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
title_short | Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
title_sort | formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9561683/ https://www.ncbi.nlm.nih.gov/pubmed/36229434 http://dx.doi.org/10.1038/s41377-022-00984-5 |
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