Squeezing formaldehyde into C fullerene.

The cavity inside fullerene C provides a highly symmetric and inert environment for housing atoms and small molecules. Here we report the encapsulation of formaldehyde inside C by molecular surgery, yielding the supermolecular complex CHO@C, despite the 4.4 Å van der Waals length of CHO exceeding the 3.

Correction: Terahertz spectroscopy of the helium endofullerene He@C.

Correction for 'Terahertz spectroscopy of the helium endofullerene He@C' by Tanzeeha Jafari , , 2022, , 9943-9952, https://doi.org/10.1039/D2CP00515H.

Ne, Ar, and Kr oscillators in the molecular cavity of fullerene C60.

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 samples (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.

A combined inelastic neutron scattering and simulation study of the He@C endofullerene.

The He@C endofullerene consists of a single He atom entrapped inside a C fullerene cage. The confining potential, arising from the non-covalent interaction between the enclosed He atom and the C atoms of the cage, is investigated by inelastic neutron scattering. These measurements allow us to obtain information in both energy () and momentum () transfers in the form of the dynamical structure factor (, ).

Synthesis and Kr NMR spectroscopy of Kr@C.

Synthesis of Kr@C is achieved by quantitative high-pressure encapsulation of the noble gas into an open-fullerene, and subsequent cage closure. Krypton is the largest noble gas entrapped in C using 'molecular surgery' and Kr@C is prepared with >99.4% incorporation of the endohedral atom, in 4% yield from C.