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Measuring the mecha...
Measuring the mechanical properties of molecular conformers
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- Jarvis, Samuel P. (författare)
- School of Physics and Astronomy, University of Nottingham
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- Taylor, Simon (författare)
- School of Physics and Astronomy, University of Nottingham
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- Baran, Jakub D. (författare)
- Tyndall National Institute, University College Cork, School of Chemistry, University of Bath
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- Champness, Neil R. (författare)
- School of Chemistry, the University of Nottingham
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- Larsson, Andreas (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Moriarty, Philip (författare)
- School of Physics and Astronomy, University of Nottingham
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(creator_code:org_t)
- 2015-09-21
- 2015
- Engelska.
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 6
- Relaterad länk:
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https://www.nature.c...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Scanning probe-actuated single molecule manipulation has proven to be an exceptionally powerful tool for the systematic atomic-scale interrogation of molecular adsorbates. To date, however, the extent to which molecular conformation affects the force required to push or pull a single molecule has not been explored. Here we probe the mechanochemical response of two tetra(4-bromophenyl)porphyrin conformers using non-contact atomic force microscopy where we find a large difference between the lateral forces required for manipulation. Remarkably, despite sharing very similar adsorption characteristics, variations in the potential energy surface are capable of prohibiting probe-induced positioning of one conformer, while simultaneously permitting manipulation of the alternative conformational form. Our results are interpreted in the context of dispersion-corrected density functional theory calculations which reveal significant differences in the diffusion barriers for each conformer. These results demonstrate that conformational variation significantly modifies the mechanical response of even simple porpyhrins, potentially affecting many other flexible molecules
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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