Cargando…
Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters
Metal nanoclusters, owing to their intriguing optical properties, have captivated research interest over the years. Of special interest have been chiral nanoclusters that display optical activity in the visible region of the electromagnetic spectrum. While the ground state chiral properties of metal...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10231326/ https://www.ncbi.nlm.nih.gov/pubmed/37265730 http://dx.doi.org/10.1039/d3sc00686g |
_version_ | 1785051720496185344 |
---|---|
author | Dutta, Camelia Maniappan, Sonia Kumar, Jatish |
author_facet | Dutta, Camelia Maniappan, Sonia Kumar, Jatish |
author_sort | Dutta, Camelia |
collection | PubMed |
description | Metal nanoclusters, owing to their intriguing optical properties, have captivated research interest over the years. Of special interest have been chiral nanoclusters that display optical activity in the visible region of the electromagnetic spectrum. While the ground state chiral properties of metal nanoclusters have been reasonably well studied, of late research focus has shifted attention to their excited state chiral investigations. Herein, we report the synthesis and chiral investigations of a pair of enantiomerically pure copper nanoclusters that exhibit intense optical activity, both in their ground and excited states. The synthesis of nanoclusters using l- and d-isomers of the chiral ligand led to the formation of metal clusters that displayed mirror image circular dichroism and circularly polarized luminescence signals. Structural validation using single crystal XRD, powder XRD and XPS in conjunction with chiroptical and computational analysis helped to develop a structure–property correlation that is unique to such clusters. Investigations on the mechanism of photoluminescence revealed that the system exhibits long excited state lifetimes. A combination of delayed luminescence and chirality resulted in circularly polarized delayed luminescence, a phenomenon that is rather uncommon to the field of metal clusters. The chiral emissive properties could be successfully demonstrated in free-standing polymeric films highlighting their potential for use in the field of data encryption, security tags and polarized light emitting devices. Moreover, the fundamental understanding of the mechanism of excited state chirality in copper clusters opens avenues for the exploration of similar effects in a variety of other clusters. |
format | Online Article Text |
id | pubmed-10231326 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-102313262023-06-01 Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters Dutta, Camelia Maniappan, Sonia Kumar, Jatish Chem Sci Chemistry Metal nanoclusters, owing to their intriguing optical properties, have captivated research interest over the years. Of special interest have been chiral nanoclusters that display optical activity in the visible region of the electromagnetic spectrum. While the ground state chiral properties of metal nanoclusters have been reasonably well studied, of late research focus has shifted attention to their excited state chiral investigations. Herein, we report the synthesis and chiral investigations of a pair of enantiomerically pure copper nanoclusters that exhibit intense optical activity, both in their ground and excited states. The synthesis of nanoclusters using l- and d-isomers of the chiral ligand led to the formation of metal clusters that displayed mirror image circular dichroism and circularly polarized luminescence signals. Structural validation using single crystal XRD, powder XRD and XPS in conjunction with chiroptical and computational analysis helped to develop a structure–property correlation that is unique to such clusters. Investigations on the mechanism of photoluminescence revealed that the system exhibits long excited state lifetimes. A combination of delayed luminescence and chirality resulted in circularly polarized delayed luminescence, a phenomenon that is rather uncommon to the field of metal clusters. The chiral emissive properties could be successfully demonstrated in free-standing polymeric films highlighting their potential for use in the field of data encryption, security tags and polarized light emitting devices. Moreover, the fundamental understanding of the mechanism of excited state chirality in copper clusters opens avenues for the exploration of similar effects in a variety of other clusters. The Royal Society of Chemistry 2023-04-25 /pmc/articles/PMC10231326/ /pubmed/37265730 http://dx.doi.org/10.1039/d3sc00686g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Dutta, Camelia Maniappan, Sonia Kumar, Jatish Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
title | Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
title_full | Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
title_fullStr | Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
title_full_unstemmed | Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
title_short | Delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
title_sort | delayed luminescence guided enhanced circularly polarized emission in atomically precise copper nanoclusters |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10231326/ https://www.ncbi.nlm.nih.gov/pubmed/37265730 http://dx.doi.org/10.1039/d3sc00686g |
work_keys_str_mv | AT duttacamelia delayedluminescenceguidedenhancedcircularlypolarizedemissioninatomicallyprecisecoppernanoclusters AT maniappansonia delayedluminescenceguidedenhancedcircularlypolarizedemissioninatomicallyprecisecoppernanoclusters AT kumarjatish delayedluminescenceguidedenhancedcircularlypolarizedemissioninatomicallyprecisecoppernanoclusters |