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Combined ²H NMR and neutron spectroscopy study of dynamics of adsorbed species in porous materials

Abstract : The work is dedicated to the investigation of dynamics of molecular species confined in nano-meso porous media. To investigate the translational diffusion, quasielastic neutron scattering technique was used. To characterize the rotational dynamics and intramolecular dynamics of the confined species, solid state 2H NMR was used. Several systems were studied : (i) dynamics of water in selective water sorbent SWS-1L based on CACL2 salt and porous silica ; (ii) dynamics of linear alkanes confined in zeolite 5A pores ; (iii) dynamics of linear butane in zeolite ZSM-5 ; (iv) dynamics of benzene rings in the metal-organic frameworks MIL-53 and MIL-47 ; (v) dynamics of hydrogen in MILs47 and 53. In all cases, the dynamics and the state of adsorbed species were characterized and it was shown that the dynamics in confinement strongly deviates from the dynamics in the usual bulk state.
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  • HAL Id : tel-00833374, version 1

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Daniil Kolokolov. Combined ²H NMR and neutron spectroscopy study of dynamics of adsorbed species in porous materials. Other [cond-mat.other]. Université Claude Bernard - Lyon I, 2010. Russian. ⟨NNT : 2010LYO10102⟩. ⟨tel-00833374⟩

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