Some basic correlations in the thermal (kinetic) stability of inclusion compounds on the basis of microporous metal–organic frameworks

Vladimir Logvinenko, Marina Zavakhina, Vsevolod Bolotov, Denis Pishchur, Danil Dybtsev

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Metal–organic frameworks (MOFs) have promising practical applications in gas storage, separation and purification, and catalysis. The standard process for MOF production begins with the synthesis of the inclusion compound. The molecules of the organic solvent used are caught in the channels and caves of the MOF structure. These primary inclusion guest molecules are excluded further by the evacuation or by the heating. We investigate a series of inclusion compounds and study the correlation between their thermal (kinetic) stability and the framework and guest molecule properties. Thermogravimetric curves are used for the kinetic studies. Kinetic parameters of decomposition are estimated within the approaches of non-isothermal kinetics (“model-free” kinetics and nonlinear regression methods). We discuss guest molecular kinetic diameters, guest molecule sizes, shape and polarity, the guest phase state (fluid or solid) within the framework pores, the flexibility of the framework structures, the enthalpy and entropy contributions to the kinetic stability and the inclusion compound properties with very similar frameworks (channel walls with similar chemical constitutions), but with different channels length.

Original languageEnglish
Pages (from-to)335-342
Number of pages8
JournalJournal of Thermal Analysis and Calorimetry
Volume130
Issue number1
DOIs
Publication statusPublished - 1 Oct 2017

Keywords

  • Inclusion compounds
  • Kinetic stability
  • Metal–organic frameworks
  • Molecular kinetic diameters
  • Non-isothermal kinetics

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