ORCID Profile
0000-0001-9878-1180
Current Organisation
University of Southampton
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Publisher: Wiley
Date: 04-03-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC04201C
Abstract: Synthesis of Ar@C 60 is described, using a route in which high-pressure argon filling of an open-fullerene and photochemical desulfinylation are the key steps for % encapsulation of the noble gas.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CP02253F
Abstract: Uniting inelastic neutron scattering and numerical simulations to fully understand the dynamics of 3 He atoms confined within C 60 cages.
Publisher: Wiley
Date: 04-03-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2CP00515H
Abstract: The confinement potential of the He atom encapsulated by the C 60 molecular cage is obtained from the terahertz spectra.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2CC03398D
Abstract: Synthesis of Kr@C 60 is achieved by a synthetic route that involves quantitative encapsulation of krypton by an open-cage derivative of C 60 . Fine structure is observed in the 13 C NMR spectrum, and 83 Kr NMR characterisation is carried out.
Publisher: Elsevier BV
Date: 12-2015
DOI: 10.1016/J.JMR.2015.10.011
Abstract: (133)Cs nuclear magnetic resonance (NMR) spectroscopy was conducted on (133)Cs(+) in gelatin hydrogels that were either relaxed or stretched. Stretching generated a septet from this spin-7/2 nucleus, and its nuclear magnetic relaxation was studied via z-spectra, and two-dimensional nuclear Overhauser (NOESY) spectroscopy. Various spectral features were well simulated by using Mathematica and the software package SpinDynamica. Spectra of CsCl in suspensions of human erythrocytes embedded in gelatin gel showed separation of the resonances from the cation inside and outside the cells. Upon stretching the s le, the extracellular (133)Cs(+) signal split into a septet, while the intracellular peak was unchanged, revealing different alignment/ordering properties of the environment inside and around the cells. Differential interference contrast light microscopy confirmed that the cells were stretched when the overall s le was elongated. Analysis of the various spectral features of (133)Cs(+) reported here opens up applications of this K(+) congener for studies of cation-handling by metabolically-active cells and tissues in aligned states.
Publisher: AIP Publishing
Date: 20-06-2023
DOI: 10.1063/5.0152628
Abstract: We used THz (terahertz) and INS (inelastic neutron scattering) spectroscopies to study the interaction between an endohedral noble gas atom and the C60 molecular cage. The THz absorption spectra of powdered A@C60 s les (A = Ar, Ne, Kr) were measured in the energy range from 0.6 to 75 meV for a series of temperatures between 5 and 300 K. The INS measurements were carried out at liquid helium temperature in the energy transfer range from 0.78 to 54.6 meV. The THz spectra are dominated by one line, between 7 and 12 meV, at low temperatures for three noble gas atoms studied. The line shifts to higher energy and broadens as the temperature is increased. Using a spherical oscillator model, with a temperature-independent parameterized potential function and an atom-displacement-induced dipole moment, we show that the change of the THz spectrum shape with temperature is caused by the anharmonicity of the potential function. We find good agreement between experimentally determined potential energy functions and functions calculated with Lennard-Jones additive pair-wise potentials with parameters taken from the work of Pang and Brisse, J. Chem. Phys. 97, 8562 (1993).
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United States of America
No related grants have been discovered for Malcolm Levitt.