Fig. 5: Experimental results.
From: Asymmetric rotations slow down diffusion under confinement
A SEM image of SBA-15 (mesoporous silica), B breakthrough curves, and C apparent diffusivity (Dapp) of C6H4F2, C6H4BrF, and C6H4Br2 in SBA-15 at 298 K obtained from Intelligent Gravimetric Analyzer (IGA) uptake experiments. The C/C0 represents the relative concentration of the gas. The dark green, white, cyan and dark red balls represent C, H, F and Br atoms, respectively. D SEM image of AlPO4-5 (AFI), E breakthrough curves, and F Dapp of C6H4F2, C6H4BrF, and C6H4Br2 in AlPO4-5 at 298 K obtained from IGA uptake experiments. Dapp is the apparent diffusivity of guest molecules and l is the half thickness of the characteristic length of crystal. Uptake measurements of guest molecules obtained from synchrotron radiation-based infrared microscope (SR-IRM). G Optical view of SR-IRM and selected AlPO4-5 zeolite crystal with large size. Light spot is indicated by the visible light. H Uptake rate curves of C6H4F2, C6H4Br2 and C6H4BrF molecules at 298 K by SR-IRM. I 2H solid-state NMR spectra of C6D4F2, C6D4BrF and C6D4Br2 in AlPO4−5 at 298 K.
