Elucidating the Structural Evolution of a Highy Porous Responsive Metal-Organic Framework (DUT-49(M)) upon Guests Desorption by Time-Resolved In-Situ Powder X-Ray Diffraction

04 August 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Variation in the metal centres of M-M paddle-wheel SBU results in the formation of isostructural DUT-49(M) frameworks. However, the porosity of the framework was found to be different for each of the structures. While a high and moderate porosity was obtained for DUT-49(Cu) and DUT-49(Ni), respectively, other members of the series [DUT-49(M); M= Mn, Fe, Co, Zn, Cd] show very low porosity and shapes of the adsorption isotherms which is not expected for op phases of these MOFs. Investigation on those MOFs revealed that those frameworks undergo structural collapse during the solvent removal at the activation step. Thus, herein, we aimed to study the detailed structural transformations that are possibly occurring during the removal of the subcritical fluid from the framework.

Keywords

flexible MOFs
in situ PXRD
DUT-49
desolvation activation energy

Supplementary materials

Title
Description
Actions
Title
DUT49-Cu-Single Crystal Evaporation croped 10x
Description
Actions
Title
2020-8-03-ESI-DUT-49M-guest-desorption
Description
Actions
Title
2020-8-03-DUT-49M-guest-desorption
Description
Actions

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