Observation of Vibronic -Coupling -Mediated Energy Transfer in Light-Harvesting Nanotubes Stabilized in a Solid-State Matrix
View / Open Files
Authors
Thomas, Tudor
Richter, Johannes
Chen, Richard
Journal Title
Journal of Physical Chemistry Letters
ISSN
1948-7185
Publisher
American Chemical Society (ACS)
Volume
9
Issue
18
Pages
5604-5611
Type
Article
Metadata
Show full item recordCitation
Pandya, R., Rao, A., Cheminal, A., Thomas, T., Richter, J., Chen, R., Deschler, F., et al. (2018). Observation of Vibronic -Coupling -Mediated Energy Transfer in Light-Harvesting Nanotubes Stabilized in a Solid-State Matrix. Journal of Physical Chemistry Letters, 9 (18), 5604-5611. https://doi.org/10.1021/acs.jpclett.8b02325
Abstract
Ultrafast vibrational spectroscopy is employed to obtain real-time structural information of energy transport in double-walled light harvesting nanotubes at room temperature, stabilized in a host matrix to mimic the rigid scaffolds of natural light harvesting systems. We observe evidence of a low-frequency vibrational mode at 315 cm-1 which transfers excitons from the outer wall of the nanotubes to a crossing point through which energy transfer to the inner wall can occur. This mode is furthermore absent in solution phase. Importantly, the coherence of this mode is not transferred to the inner wall upon energy transfer and is only present on the outer wall’s excited state energy surface, highlighting that complete energy transfer between the outer and inner walls does not take place. Isolation of the individual walls of the nanotubes provides evidence that this mode corresponds to a supramolecular motion of the nanotubes. Our results emphasize the importance of the solid state environment in modulating vibronic coupling and directing energy transfer in molecular light-harvesting systems.
Relationships
Sponsorship
Winton Program for Physics of Sustainability
Funder references
EPSRC (EP/M006360/1)
EPSRC (EP/P027741/1)
Identifiers
External DOI: https://doi.org/10.1021/acs.jpclett.8b02325
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285152
Rights
Licence:
http://www.rioxx.net/licenses/all-rights-reserved