Experimental and computational characterisation of an artificial light harvesting complex

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dc.contributor.authorSlimani, S.L.
dc.contributor.authorKostecki, R.
dc.contributor.authorKursunlu, A.N.
dc.contributor.authorKee, T.W.
dc.contributor.authorTapping, P.C.
dc.contributor.authorMak, A.M.
dc.contributor.authorQuach, J.Q.
dc.date.issued2023
dc.descriptionPublished on 10 January 2023
dc.description.abstractPhotosynthesis has been shown to be a highly efficient process for energy transfer in plants and bacteria. Like natural photosynthetic systems, the artificial light harvesting complex (LHC) BODIPY pillar[5]arene exhibits Fo¨rster resonance energy transfer (FRET). However, extensive characterisation of the BODIPY pillar[5]arene LHC to determine its suitability as an artificial LHC has yet to occur. In this paper we experimentally and computationally investigate the photophysical properties of the LHC by comparing the light absorption of the BODIPY LHC to individual BODIPY chromophores. Our results show evidence for quantum coherence, with oscillation frequencies of 100 cm1 and 600 cm1 , which are attributable to vibronic, or exciton–phonon type coupling. Computational analysis suggests strong couplings of the molecular orbitals of the LHC resulting from the stacking of neighbouring BODIPY chromophore units. Interestingly, we find a 40% reduction in the absorbance of light for the BODIPY LHC compared to the individual chromophores which we attribute to electronic interactions between the conjugated p-systems of the BODIPY chromophores and the pillar[5]arene backbone.
dc.description.statementofresponsibilitySabrina L. Slimani, Roman Kostecki, Ahmed Nuri Kursunlu, Tak W. Kee, Patrick C. Tapping, Adrian M. Mak and James Q. Quach
dc.identifier.citationPhysical Chemistry Chemical Physics, 2023; 25(6):4743-4753
dc.identifier.doi10.1039/d2cp03858g
dc.identifier.issn1463-9076
dc.identifier.issn1463-9084
dc.identifier.orcidSlimani, S.L. [0000-0002-6229-3772]
dc.identifier.orcidKostecki, R. [0000-0001-5822-8401]
dc.identifier.orcidKee, T.W. [0000-0002-4907-4663]
dc.identifier.orcidTapping, P.C. [0000-0002-2359-1304]
dc.identifier.orcidQuach, J.Q. [0000-0002-3619-2505]
dc.identifier.urihttps://hdl.handle.net/2440/137406
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160103797
dc.relation.granthttp://purl.org/au-research/grants/arc/LE0989747
dc.relation.granthttp://purl.org/au-research/grants/arc/LE130100158
dc.rightsThis journal is © the Owner Societies 2023
dc.source.urihttps://doi.org/10.1039/d2cp03858g
dc.titleExperimental and computational characterisation of an artificial light harvesting complex
dc.typeJournal article
pubs.publication-statusPublished

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