title: Synergetic effect of temperature and pressure on energetic and structural characteristics of {ZIF-8 + water} molecular spring.
abstract: Metal-organic frameworks (MOFs) and particularly their subclass - Zeolite Imidazolate Frameworks (ZIFs) - are used for a variety of applications including particularly energy storage. Highly porous MOFs mixed with non-wetting liquids can be used to form molecular springs (MS) for efficient mechanical and thermal energy storage/transformation. In this paper by means of high-pressure calorimetry the energetic characteristics of {ZIF-8 + water} MS were investigated in wide temperature and pressure ranges. Unexpectedly XRD measurements show that the concomitant effects of temperature and pressure on {ZIF-8 + water} MS leads to an irreversible change of the ZIF-8 structure, transforming its symmetry from cubic to orthorhombic. Whereas, previous studies have demonstrated the stability of ZIF-8 under either high pressure or high temperature.
authors.affiliation: Clermont Université ENSCC, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France.
authors.forename: Ya
authors.initials: Y
authors.lastname: Grosu
authors.forename: G
authors.initials: G
authors.lastname: Renaudin
authors.forename: V
authors.initials: V
authors.lastname: Eroshenko
authors.forename: J-M
authors.initials: JM
authors.lastname: Nedelec
authors.forename: J-P E
authors.initials: JP
authors.lastname: Grolier