engleski

Mechanochemical strategy for controllable encapsulation of Buckminsterfullerene for preparation of fulleretic ZIF materials

Fullerene and fullerene derivatives show tremendous application potential due to their unique physico-chemical properties. Functional materials with fullerene embedded in their structure are researched due to their increased stability, conductivity, or catalytic activity compared to their constitutional components. Metal-organic frameworks (MOFs) are a class of porous crystalline materials extensively studied for their applicability. Enclosing the fullerenes inside the pores of MOFs produces fulleretic materials with unique properties.[1] Guest encapsulation into MOFs is mainly done by solution post-synthetic methods, which depend on the solubility, MOFs aperture size and competition with the solvent.[2] Here, a fast and green mechanochemical approach, in which a framework is formed around the guest, arose as a suitable solution because it requires only traces of solvents. Ball milling allowed stoichiometrically controlled encapsulation into sodalite ZIF (zeolitic-imidazolate framework) and provided C60@ZIF crystalline materials containing various amounts of fullerene entrapped in the available pores of the ZIF while solution-based strategies resulted in minimal load. The aforementioned approach is highly efficient, and fullerenes are immobilized within the ZIF with the precise spatial arrangement inside the framework matrix which gives them single-molecule-like properties.[3] Therefore, we expect it can be used to confine other rigid nanoguests in suitable MOFs to achieve new and advanced MOF materials. [1] A.M. Rice, E.A. Dolgopolova, N.B. Shustova, Chem. Mater. 29 (2017) 7054–7061. [2] S.B.T. Sadjadi, Organic Nanoreactors, Elsevier: Boston, 2016. [3] V. Martinez, B. Karadeniz, N. Biliškov, I. Lončarić, S. Muratović, D. Žilić, S.M. Avdoshenko, M. Roslova, A.A. Popov, K. Užarević, Chem. Mater. 32 (2020) 10628–10640

mechanochemistry ; encapsulation ; MOF ; fullerene

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