A Tunable,Fullerene-Based Molecular Amplifier for Vibrational Circular Dichroism |
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| Authors: | Benjamin H. Strudwick Mark A. J. Koenis Hans J. Sanders Valentin P. Nicu Sander Woutersen Prof. Wybren Jan Buma |
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| Affiliation: | 1. Molecular Photonics Group, Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands;2. Department of Environmental Science, Physics, Physical Education and Sport, Lucian Blaga University of Sibiu, loan Ratiu Street, Nr. 7-9, 550012 Sibiu, Romania |
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| Abstract: | Vibrational circular dichroism (VCD) studies are reported on a chiral compound in which a fullerene C60 moiety is used as an electron acceptor and local VCD amplifier for an alanine-based peptide chain. Four redox states are investigated in this study, of which three are reduced species that possess low-lying electronic states as confirmed by UV/Vis spectroelectrochemistry. VCD measurements in combination with (TD)DFT calculations are used to investigate (i) how the low-lying electronic states of the reduced species modulate the amplification of VCD signals, (ii) how this amplification depends on the distance between oscillator and amplifier, and (iii) how the spatial extent of the amplifier influences amplification. These results pave the way for further development of tailored molecular VCD amplifiers. |
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| Keywords: | chirality density functional calculations fullerenes spectroelectrochemistry vibrational circular dichroism |
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