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Article Dans Une Revue Inorganic Chemistry Année : 2022

Insights into Solid-To-Solid Transformation of MOF Amorphous Phases

Stephanie Bruyere
Andrei Krasilin
Pascal Boulet
Sebastien Hupont
Alexandre Nominé,
Brigitte Vigolo
Alexander Novikov
Thierry Belmonte

Résumé

Metal–organic frameworks (MOFs) have been recently explored as crystalline solids for conversion into amorphous phases demonstrating non-specific mechanical, catalytic, and optical properties. The real-time control of such structural transformations and their outcomes still remain a challenge. Here, we use in situ high-resolution transmission electron microscopy with 0.01 s time resolution to explore non-thermal (electron induced) amorphization of a MOF single crystal, followed by transformation into an amorphous nanomaterial. By comparing a series of M-BTC (M: Fe3+, Co3+, Co2+, Ni2+, and Cu2+; BTC: 1,3,5-benzentricarboxylic acid), we demonstrate that the topology of a metal cluster of the parent MOFs determines the rate of formation and the chemistry of the resulting phases containing an intact ligand and metal or metal oxide nanoparticles. Confocal Raman and photoluminescence spectroscopies further confirm the integrity of the BTC ligand and coordination bond breaking, while high-resolution imaging with chemical and structural analysis over time allows for tracking the dynamics of solid-to-solid transformations. The revealed relationship between the initial and resulting structures and the stability of the obtained phase and its photoluminescence over time contribute to the design of new amorphous MOF-based optical nanomaterials

Domaines

Matériaux
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Dates et versions

hal-03797175 , version 1 (04-10-2022)

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Yuri Mezenov, Stephanie Bruyere, Andrei Krasilin, Ekaterina Khrapova, Semyon Bachinin, et al.. Insights into Solid-To-Solid Transformation of MOF Amorphous Phases. Inorganic Chemistry, 2022, 61 (35), pp.13992-14003. ⟨10.1021/acs.inorgchem.2c01978⟩. ⟨hal-03797175⟩
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