Fig. 1: Diffusion in the bulk phase and inside zeolite.
From: Asymmetric rotations slow down diffusion under confinement
A Initial structures of C6H4BrF (1-bromo-3-fluorobenzene) in the bulk phase. B The spin echo-attenuation of PFG NMR as a function of \({{{{\rm{\delta }}}}}^{2}{\gamma }^{2}{g}^{2}\)(\(\Delta -\delta /3\)) on the log-linear scale for C6H4F2, C6H4BrF and C6H4Br2 in the bulk phase. I and I0 are the signal amplitudes with and without gradient strength (g), \(\gamma\) is the gyromagnetic ratio of the 1H nucleus, \(\delta\) is the effective gradient pulse duration, \(\Delta\) is the diffusion time. C Initial structures of C6H4BrF inside AFI zeolite. The dark green, white, cyan and dark red balls represent C, H, F and Br atoms, respectively; yellow represents zeolite framework. Self-diffusion coefficient (Ds) for various molecules in the bulk phase by D MD simulation and E PFG-NMR technique. F Ds for various molecules inside AFI zeolite by MD simulation at 298 K.
