Journal article

Bilirubin analogues as model compounds for exciton coupling

Igor Lyskov, Andre Anda, Yee X Wong, Andrew J Tilley, Christopher R Hall, Joel Thia, Salvy P Russo, Wallace WH Wong, Jared H Cole, Trevor A Smith

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | ROYAL SOC CHEMISTRY | Published : 2020

Abstract

A series of phycobilin analogues have been investigated in terms of coupled excitonic systems. These compounds consist of a monomer, a tetrapyrrole structurally similar to bilirubin (bR), and two conjugated bR analogues. Spectroscopic and computational methods have been used to investigate the degree of interchromophore coupling. We find the synthesised bR analogue shows stronger excitonic coupling than bR, owing to a different molecular geometry. The excitonic coupling in the conjugated molecules can be controlled by modifying the bridge side-group. New computed energy levels for bR using the DFT/MRCI method are also presented, which improve on published values and re-assign the character o..

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Grants

Awarded by Australian Government through the Australian Research Council (ARC) under the Centre of Excellence scheme


Funding Acknowledgements

This work was supported by the Australian Government through the Australian Research Council (ARC) under the Centre of Excellence scheme (project number CE170100026). It was also supported by computational resources provided by the Australian Government through the National Computational Infrastructure National Facility and the Pawsey Supercomputer Centre.