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Spectral and Structural Variations of Biomimetic Light-Harvesting Nanotubes

Title data

Löhner, Alexander ; Kunsel, Tenzin ; Röhr, Merle I. S. ; Jansen, Thomas L. C. ; Sengupta, Sanchita ; Würthner, Frank ; Knoester, Jasper ; Köhler, Jürgen:
Spectral and Structural Variations of Biomimetic Light-Harvesting Nanotubes.
In: The Journal of Physical Chemistry Letters. Vol. 10 (2019) . - pp. 2715-2724.
ISSN 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.9b00303

Abstract in another language

Bioinspired, self-assembled nanotubes have been investigated by low-temperature, polarization-resolved single-tube spectroscopy. These assemblies are based on zinc chlorin monomers and are considered as model systems that resemble the secondary structural elements in the natural light-harvesting systems of green (non)sulfur bacteria. Compared to the natural systems, the spectral parameters extracted from the single-nanotube spectra feature distributions with significantly smaller widths, which is ascribed to a tremendous reduction of structural heterogeneity in the artificial systems. Employing quantum chemical molecular modeling the spectra of individual nanotubes can be explained consistently only for a molecular packing model that is fundamentally different from those considered so far for the natural systems. Subsequent theoretical simulations reveal that the remaining spectral variations between single nanotubes can be traced back to small variations of the mutual orientations of the monomer transition dipole moments that are far beyond the resolving power of high-resolution electron microscopy imaging techniques.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik IX - Spektroskopie weicher Materie > Lehrstuhl Experimentalphysik IX - Spektroskopie weicher Materie - Univ.-Prof. Dr. Jürgen Köhler
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 17 May 2019 06:56
Last Modified: 17 May 2019 06:56
URI: https://eref.uni-bayreuth.de/id/eprint/48983