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Energy transfer

Vibronic coherence unveiled

Pigment assemblies with high-efficiency electronic energy transfer have recently been observed to show unusual and persistent coherence, but its origin is not fully understood. Now, a combination of 2D electronic spectroscopy and theoretical modelling has allowed the excitonic coherence signal of a strongly coupled homodimer to be isolated.

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Figure 1: The potential energy curves (solid) and vibrational energy levels (dashed) for a model bis-cyanine homodimer.

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Acknowledgements

The authors are grateful to the US National Science Foundation for support under grant number CHE-1112365.

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Correspondence to David M. Jonas.

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Tiwari, V., Peters, W. & Jonas, D. Vibronic coherence unveiled. Nature Chem 6, 173–175 (2014). https://doi.org/10.1038/nchem.1881

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