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A complex comprising a cyanine dye rotaxane and a porphyrin nanoring as a model light‐harvesting system

Abstract:
A nanoring‐rotaxane supramolecular assembly with a Cy7 cyanine dye (hexamethylindotricarbocyanine) threaded along the axis of the nanoring was synthesized as a model for the energy transfer between the light‐harvesting complex LH1 and the reaction center in purple bacteria photosynthesis. The complex displays efficient energy transfer from the central cyanine dye to the surrounding zinc porphyrin nanoring. We present a theoretical model that reproduces the absorption spectrum of the nanoring and quantifies the excitonic coupling between the nanoring and the central dye, thereby explaining the efficient energy transfer and demonstrating similarity with structurally related natural light‐harvesting systems.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1002/anie.202006644

Authors



Publisher:
Wiley
Journal:
Angewandte Chemie International Edition More from this journal
Volume:
59
Issue:
38
Pages:
16455-16458
Publication date:
2020-07-23
Acceptance date:
2020-06-09
DOI:
EISSN:
1521-3773
ISSN:
1433-7851


Language:
English
Keywords:
Pubs id:
1113707
Local pid:
pubs:1113707
Deposit date:
2020-06-20

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