Chemical shielding of H2O and HF encapsulated inside a C60 cage

Samuel P. Jarvis*, Hongqian Sang, Filipe Junqueira, Oliver Gordon, Jo E.A. Hodgkinson, Alex Saywell, Philipp Rahe, Salvatore Mamone, Simon Taylor, Adam Sweetman, Jeremy Leaf, David A. Duncan, Tien Lin Lee, Pardeep K. Thakur, Gabriella Hoffman, Richard J. Whitby, Malcolm H. Levitt, Georg Held, Lev Kantorovich, Philip MoriartyRobert G. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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.

Original languageEnglish
Article number135
JournalCommunications Chemistry
Volume4
Issue number1
DOIs
Publication statusPublished - Dec 2021

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