doi:10.1039/C6CP01950AengJagiello, J.Sterling, M.Eliášová, P.Opanasenko, M.Zukal, A.Morris, R.Navarro, M.Mayoral, A.Crivelli, P.Warringham, R.Mitchell, S.Perez-Ramirez, J.Cejka, J.Structural analysis of IPC zeolites and related materials using positron annihilation spectroscopy and high-resolution argon adsorptionART-2016-94821The advanced investigation of pore networks of isoreticular zeolites and mesoporous materials related to the IPC family was performed using high-resolution argon adsorption experiments coupled with the development of a state-of-the-art non-linear density functional theory approach. The optimization of a kernel for model sorption isotherms for materials possessing the same layer structure, differing only in the interlayer connectivity (e.g. oxygen bridges, single- or double- four-ring building units, mesoscale pillars etc.) revealed remarkable differences in their porous systems. Using high- resolution adsorption data, the bimodal pore size distribution consistent with crystallographic data for IPC-6, IPC-7 and UTL samples is shown for the first time. A dynamic assessment by positron annihilation lifetime spectroscopy (PALS) provided complementary insights, simply distinguishing the enhanced accessibility of the pore network in samples incorporating mesoscale pillars and revealing the presence of a certain fraction of micropores undetected by gas sorption. Nonetheless, subtle differences in the pore size could not be discriminated based on the widely-applied Tao-Eldrup model. The combination of both methods can be useful for the advanced characterization of microporous, mesoporous and hierarchical materials.2016http://zaguan.unizar.es/record/6131510.1039/C6CP01950Ahttp://zaguan.unizar.es/record/61315oai:zaguan.unizar.es:61315info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2Physical chemistry chemical physics. 18 (2016), 15269-15277by-nchttp://creativecommons.org/licenses/by-nc/3.0/es/info:eu-repo/semantics/openAccess