Janicke, M.Chmelka, B.F.Larsen, R.G.Shore, J.Schmidt-Rohr, K.Emsley, L.Long, H.Pines, A.2015-01-082015-01-082015-01-08199410.1016/S0167-2991(08)64153-1https://infoscience.epfl.ch/handle/20.500.14299/110178Two-dimensional (2D) exchange NMR is a powerful tool for measuring the dynamics and energetics of adsorbed xenon atoms undergoing slow exchange between the alpha-cages of Na-A zeolite. In this proceedings, we present recently published results, as well as additional discussion and data obtained, using 2D Xe-129 NMR to determine rate coefficients for intercage xenon hopping and to correlate them with adsorption and activation energies. Variable-temperature experiments establish the activation energy for hopping between alpha-cages to be 60+/-10 kJ/mol. The dependence of these kinetic and thermodynamic quantities on xenon occupancy of the alpha-cages reflects the importance of intracage interactions on the behavior of the adsorbed guest molecules.text::conference output::conference proceedings::conference paper