Journal article

A Complex Comprising a Cyanine Dye Rotaxane and a Porphyrin Nanoring as a Model Light-Harvesting System

Jiratheep Pruchyathamkorn, William J Kendrick, Andrew T Frawley, Andrea Mattioni, Felipe Caycedo-Soler, Susana F Huelga, Martin B Plenio, Harry L Anderson

Angewandte Chemie International Edition | Wiley | Published : 2020

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-harve..

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University of Melbourne Researchers

Grants

Awarded by European Research Council via the Synergy grant BioQ


Funding Acknowledgements

This work was supported by the European Research Council via the Synergy grant BioQ (Grant no. 319130) and was made possible through the support of a grant from the John Templeton Foundation. The opinions expressed in this publication are those of the authors and do not necessarily reflect the views of the John Templeton Foundation. ATF thanks Christ Church, Oxford, for a Junior Research Fellowship.