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Covalently linked pyrene antennas for optically dense yet aggregation-resistant light-harvesting systems

Salah, Lubna; Makhseed, Saad; Ghazal, Basma; Abdel Nazeer, Ahmed; Etherington, Marc K.; Ponseca Jr., Carlito S.; Li, Chunyong; Monkman, Andrew P.; Danos, Andrew; Shuaib, Ali

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Authors

Lubna Salah

Saad Makhseed

Basma Ghazal

Ahmed Abdel Nazeer

Marc K. Etherington

Carlito S. Ponseca Jr.

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Dr Chunyong Li chunyong.li@durham.ac.uk
Laser Science Experimental Officer

Ali Shuaib



Abstract

In this study we present a novel energy transfer material inspired by natural light-harvesting antenna arrays, zinc(II) phthalocyanine-pyrene (ZnPcPy). The ZnPcPy system facilitates energy transfer from 16 covalently linked pyrene (Py) donor chromophores to the emissive central zinc(II) phthalocyanine (ZnPc) core. Nearly 98% energy transfer efficiency is determined from the changes in emission decay rates between free MePy to covalently linked Py, supported by comparisons of photoluminescence quantum yields using different excitation wavelengths. A comparative analysis of ZnPcPy and an equivalent mixture of ZnPc and MePy demonstrates the superior light-harvesting performance of the covalently linked system, with energy transfer rates 9705 times higher in the covalently bound system. This covalent strategy allows for very high loadings of absorbing Py chromophores to be achieved while also avoiding exciton quenching that would otherwise arise, with the same strategy widely applicable to other pairs of Főrster resonance energy transfer (FRET) chromophores.

Citation

Salah, L., Makhseed, S., Ghazal, B., Abdel Nazeer, A., Etherington, M. K., Ponseca Jr., C. S., …Shuaib, A. (2023). Covalently linked pyrene antennas for optically dense yet aggregation-resistant light-harvesting systems. Physical Chemistry Chemical Physics, 25(36), 24878-24882. https://doi.org/10.1039/d3cp02586a

Journal Article Type Article
Acceptance Date Aug 26, 2023
Online Publication Date Sep 8, 2023
Publication Date 2023
Deposit Date Oct 2, 2023
Publicly Available Date Oct 2, 2023
Journal Physical Chemistry Chemical Physics
Print ISSN 1463-9076
Electronic ISSN 1463-9084
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 25
Issue 36
Pages 24878-24882
DOI https://doi.org/10.1039/d3cp02586a
Keywords Physical and Theoretical Chemistry; General Physics and Astronomy
Public URL https://durham-repository.worktribe.com/output/1755172

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