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Clustering-Triggered Emission of Carboxymethylated Nanocellulose
Non-conjugated polymers with luminescence emission property have recently drawn great attention due to their promising applications in different areas. Most traditional organic synthetic non-conjugated polymers required complicated synthesis. Herein, we report a non-conjugated biomass material, carb...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6596105/ https://www.ncbi.nlm.nih.gov/pubmed/31281810 http://dx.doi.org/10.3389/fchem.2019.00447 |
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author | Li, Meng Li, Xiaoning An, Xuefei Chen, Zhijun Xiao, Huining |
author_facet | Li, Meng Li, Xiaoning An, Xuefei Chen, Zhijun Xiao, Huining |
author_sort | Li, Meng |
collection | PubMed |
description | Non-conjugated polymers with luminescence emission property have recently drawn great attention due to their promising applications in different areas. Most traditional organic synthetic non-conjugated polymers required complicated synthesis. Herein, we report a non-conjugated biomass material, carboxymethylated nanocellulose (C-CNC), which is found to be practically non-luminescent in dilute solutions, while being highly emissive when aggregated as nanosuspensions. We propose that the luminescence of C-CNC originates from the through-space conjugation of oxygen atoms and carboxyl groups of C-CNC. Thus, a clearer mechanism of clusteroluminescence was provided with the subsequent experiments. The effects of concentration of C-CNC, solvent, temperature and pH have also been investigated. In addition, ethylenediamine (EDA) has been employed to “lock” C-CNC material via the bonding of amide groups with carboxylic groups. As prepared C-CNC/EDA confirmed that the clusteroluminescence was attributed to the amide moieties and through-space conjugation between oxygen and carbonyl moieties. Density functional theory (DFT) calculations have also been employed to confirm the luminescence mechanism. It is believed that such clustering-triggered emission mechanism is instructive for further development of unconventional luminogens. |
format | Online Article Text |
id | pubmed-6596105 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-65961052019-07-05 Clustering-Triggered Emission of Carboxymethylated Nanocellulose Li, Meng Li, Xiaoning An, Xuefei Chen, Zhijun Xiao, Huining Front Chem Chemistry Non-conjugated polymers with luminescence emission property have recently drawn great attention due to their promising applications in different areas. Most traditional organic synthetic non-conjugated polymers required complicated synthesis. Herein, we report a non-conjugated biomass material, carboxymethylated nanocellulose (C-CNC), which is found to be practically non-luminescent in dilute solutions, while being highly emissive when aggregated as nanosuspensions. We propose that the luminescence of C-CNC originates from the through-space conjugation of oxygen atoms and carboxyl groups of C-CNC. Thus, a clearer mechanism of clusteroluminescence was provided with the subsequent experiments. The effects of concentration of C-CNC, solvent, temperature and pH have also been investigated. In addition, ethylenediamine (EDA) has been employed to “lock” C-CNC material via the bonding of amide groups with carboxylic groups. As prepared C-CNC/EDA confirmed that the clusteroluminescence was attributed to the amide moieties and through-space conjugation between oxygen and carbonyl moieties. Density functional theory (DFT) calculations have also been employed to confirm the luminescence mechanism. It is believed that such clustering-triggered emission mechanism is instructive for further development of unconventional luminogens. Frontiers Media S.A. 2019-06-20 /pmc/articles/PMC6596105/ /pubmed/31281810 http://dx.doi.org/10.3389/fchem.2019.00447 Text en Copyright © 2019 Li, Li, An, Chen and Xiao. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Li, Meng Li, Xiaoning An, Xuefei Chen, Zhijun Xiao, Huining Clustering-Triggered Emission of Carboxymethylated Nanocellulose |
title | Clustering-Triggered Emission of Carboxymethylated Nanocellulose |
title_full | Clustering-Triggered Emission of Carboxymethylated Nanocellulose |
title_fullStr | Clustering-Triggered Emission of Carboxymethylated Nanocellulose |
title_full_unstemmed | Clustering-Triggered Emission of Carboxymethylated Nanocellulose |
title_short | Clustering-Triggered Emission of Carboxymethylated Nanocellulose |
title_sort | clustering-triggered emission of carboxymethylated nanocellulose |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6596105/ https://www.ncbi.nlm.nih.gov/pubmed/31281810 http://dx.doi.org/10.3389/fchem.2019.00447 |
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