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Chemical shielding of H2O and HF encapsulated inside a C60 cage

Chemical shielding of H2O and HF encapsulated inside a C60 cage
Chemical shielding of H2O and HF encapsulated inside a C60 cage
Molecular surgery provides the opportunity to study relatively large molecules encapsulated within a fullerene cage. Here we determine the location of an H2O molecule isolated within an adsorbed buckminsterfullerene cage, and compare this to the intrafullerene position of HF. Using normal incidence X-ray standing wave (NIXSW) analysis, coupled with density functional theory and molecular dynamics simulations, we show that both H2O and HF are located at an off-centre position within the fullerene cage, caused by substantial intra-cage electrostatic fields generated by surface adsorption of the fullerene. The atomistic and electronic structure simulations also reveal significant internal rotational motion consistent with the NIXSW data. Despite this substantial intra-cage interaction, we find that neither HF or H2O contribute to the endofullerene frontier orbitals, confirming the chemical isolation of the encapsulated molecules. We also show that our experimental NIXSW measurements and theoretical data are best described by a mixed adsorption site model.
2399-3669
Jarvis, Samuel P
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Sang, Hongqian
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Junqueira, Filipe
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Gordon, Oliver
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Hodgkinson, Jo E. A.
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Saywell, Alex
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Rahe, Philipp
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Mamone, Salvatore
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Taylor, Simon
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Sweetman, Adam
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Leaf, Jeremy
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Duncan, David
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Lee, Tien-Lin
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Thakur, Pardeep K.
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Hoffman, Gabriella
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Whitby, Richard J.
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Levitt, Malcolm H.
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Held, Georg
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Kantorovich, Lev
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Moriarty, Philip
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Jones, Robert G
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et al.
Jarvis, Samuel P
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Sang, Hongqian
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Junqueira, Filipe
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Gordon, Oliver
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Hodgkinson, Jo E. A.
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Saywell, Alex
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Rahe, Philipp
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Mamone, Salvatore
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Taylor, Simon
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Sweetman, Adam
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Leaf, Jeremy
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Duncan, David
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Lee, Tien-Lin
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Thakur, Pardeep K.
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Hoffman, Gabriella
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Whitby, Richard J.
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Levitt, Malcolm H.
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Held, Georg
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Kantorovich, Lev
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Moriarty, Philip
5b9734f8-c934-480b-8907-c9a47fa76dd0
Jones, Robert G
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Jarvis, Samuel P, Sang, Hongqian, Junqueira, Filipe, Mamone, Salvatore, Whitby, Richard J. and Levitt, Malcolm H. , et al. (2021) Chemical shielding of H2O and HF encapsulated inside a C60 cage. Communications Chemistry, 4 (1), [135]. (doi:10.1038/s42004-021-00569-0).

Record type: Article

Abstract

Molecular surgery provides the opportunity to study relatively large molecules encapsulated within a fullerene cage. Here we determine the location of an H2O molecule isolated within an adsorbed buckminsterfullerene cage, and compare this to the intrafullerene position of HF. Using normal incidence X-ray standing wave (NIXSW) analysis, coupled with density functional theory and molecular dynamics simulations, we show that both H2O and HF are located at an off-centre position within the fullerene cage, caused by substantial intra-cage electrostatic fields generated by surface adsorption of the fullerene. The atomistic and electronic structure simulations also reveal significant internal rotational motion consistent with the NIXSW data. Despite this substantial intra-cage interaction, we find that neither HF or H2O contribute to the endofullerene frontier orbitals, confirming the chemical isolation of the encapsulated molecules. We also show that our experimental NIXSW measurements and theoretical data are best described by a mixed adsorption site model.

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H2O_C60_accepted - Accepted Manuscript
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Accepted/In Press date: 24 August 2021
e-pub ahead of print date: 22 September 2021
Published date: 22 September 2021
Additional Information: Funding Information: We thank Diamond Light Source for the award of beam times SI12979, SI15022, and SI23644. S.P.J. thanks the Engineering and Physical Sciences Research Council (EPSRC), the Royal Society, and the Leverhulme Trust, respectively, for grants EP/V00767X/1, PI70026, and ECF-2015-005. P.J.M. gratefully acknowledges funding via an EPSRC Established Career Fellowship (EP/T033568/1). A.S. and P.R. acknowledge funding from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme for grants 623992 and 628439, respectively. A.S. also acknowledges support via a Royal Society University Research Fellowship. M.H.L. acknowledges EPSRC funding grants EP/P009980/1 and EP/T004320/1. Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

Identifiers

Local EPrints ID: 450887
URI: http://eprints.soton.ac.uk/id/eprint/450887
ISSN: 2399-3669
PURE UUID: c3e43ce4-c059-4e71-800e-48249c71b9a8
ORCID for Richard J. Whitby: ORCID iD orcid.org/0000-0002-9891-5502
ORCID for Malcolm H. Levitt: ORCID iD orcid.org/0000-0001-9878-1180

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Date deposited: 18 Aug 2021 16:32
Last modified: 06 Jun 2024 01:39

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Contributors

Author: Samuel P Jarvis
Author: Hongqian Sang
Author: Filipe Junqueira
Author: Oliver Gordon
Author: Jo E. A. Hodgkinson
Author: Alex Saywell
Author: Philipp Rahe
Author: Salvatore Mamone
Author: Simon Taylor
Author: Adam Sweetman
Author: Jeremy Leaf
Author: David Duncan
Author: Tien-Lin Lee
Author: Pardeep K. Thakur
Author: Gabriella Hoffman
Author: Georg Held
Author: Lev Kantorovich
Author: Philip Moriarty
Author: Robert G Jones
Corporate Author: et al.

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