Figure 3: INS of Cu(I)-MFU-4l dosed with H2 and D2.
From: Capture of heavy hydrogen isotopes in a metal-organic framework with active Cu(I) sites

(a) In the black spectrum the quantity of gas dosed was not enough to saturate the first adsorption sites. The second dosing (red spectrum) saturates the first site and populates the second sites (the double peak 13.4 and 14.7 meV). (b) INS spectra with D2 gas dosed in addition to H2 at 70 K, before (black) and after (red) heating to 200 K, see Supplementary Fig. 7 for more spectra measured during heating. (c) Subtraction of the spectra recorded at 5 K before and after the exchange of H2 through D2. The exchanged amount is shown by the negative sign, while H2 moved to the weaker adsorption sites as indicated by the intensity gain.