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Size-Independent Energy Transfer in Biomimetic Nanoring Complexes
[Image: see text] Supramolecular antenna-ring complexes are of great interest due to their presence in natural light-harvesting complexes. While such systems are known to provide benefits through robust and efficient energy funneling, the relationship between molecular structure, strain (governed by...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2016
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4928140/ https://www.ncbi.nlm.nih.gov/pubmed/27176553 http://dx.doi.org/10.1021/acsnano.6b01265 |
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author | Parkinson, Patrick Kamonsutthipaijit, Nuntaporn Anderson, Harry L. Herz, Laura M. |
author_facet | Parkinson, Patrick Kamonsutthipaijit, Nuntaporn Anderson, Harry L. Herz, Laura M. |
author_sort | Parkinson, Patrick |
collection | PubMed |
description | [Image: see text] Supramolecular antenna-ring complexes are of great interest due to their presence in natural light-harvesting complexes. While such systems are known to provide benefits through robust and efficient energy funneling, the relationship between molecular structure, strain (governed by nuclear coordinates and motion), and energy dynamics (arising from electronic behavior) is highly complex. We present a synthetic antenna-nanoring system based on a series of conjugated porphyrin chromophores ideally suited to explore such effects. By systematically varying the size of the acceptor nanoring, we reveal the interplay between antenna-nanoring binding, local strain, and energy dynamics on the picosecond time scale. Binding of the antenna unit creates a local strain in the nanoring, and this strain was measured as a function of the size of the nanoring, by UV–vis-NIR titration, providing information on the conformational flexibility of the system. Strikingly, the energy-transfer rate is independent of nanoring size, indicating the existence of strain-localized acceptor states, spread over about six porphyrin units, arising from the noncovalent antenna-nanoring association. |
format | Online Article Text |
id | pubmed-4928140 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-49281402016-07-01 Size-Independent Energy Transfer in Biomimetic Nanoring Complexes Parkinson, Patrick Kamonsutthipaijit, Nuntaporn Anderson, Harry L. Herz, Laura M. ACS Nano [Image: see text] Supramolecular antenna-ring complexes are of great interest due to their presence in natural light-harvesting complexes. While such systems are known to provide benefits through robust and efficient energy funneling, the relationship between molecular structure, strain (governed by nuclear coordinates and motion), and energy dynamics (arising from electronic behavior) is highly complex. We present a synthetic antenna-nanoring system based on a series of conjugated porphyrin chromophores ideally suited to explore such effects. By systematically varying the size of the acceptor nanoring, we reveal the interplay between antenna-nanoring binding, local strain, and energy dynamics on the picosecond time scale. Binding of the antenna unit creates a local strain in the nanoring, and this strain was measured as a function of the size of the nanoring, by UV–vis-NIR titration, providing information on the conformational flexibility of the system. Strikingly, the energy-transfer rate is independent of nanoring size, indicating the existence of strain-localized acceptor states, spread over about six porphyrin units, arising from the noncovalent antenna-nanoring association. American Chemical Society 2016-05-13 2016-06-28 /pmc/articles/PMC4928140/ /pubmed/27176553 http://dx.doi.org/10.1021/acsnano.6b01265 Text en Copyright © 2016 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Parkinson, Patrick Kamonsutthipaijit, Nuntaporn Anderson, Harry L. Herz, Laura M. Size-Independent Energy Transfer in Biomimetic Nanoring Complexes |
title | Size-Independent
Energy Transfer in Biomimetic Nanoring
Complexes |
title_full | Size-Independent
Energy Transfer in Biomimetic Nanoring
Complexes |
title_fullStr | Size-Independent
Energy Transfer in Biomimetic Nanoring
Complexes |
title_full_unstemmed | Size-Independent
Energy Transfer in Biomimetic Nanoring
Complexes |
title_short | Size-Independent
Energy Transfer in Biomimetic Nanoring
Complexes |
title_sort | size-independent
energy transfer in biomimetic nanoring
complexes |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4928140/ https://www.ncbi.nlm.nih.gov/pubmed/27176553 http://dx.doi.org/10.1021/acsnano.6b01265 |
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