Abstract
Among the numerous fascinating properties of metal–organic frameworks (MOFs), their rotational dynamics is perhaps one of the most intriguing, with clear consequences for adsorption and separation of molecules, as well as for optical and mechanical properties. A closer look at the rotational mobility in MOF linkers reveals that it is not only a considerably widespread phenomenon, but also a fairly diverse one. Still, the impact of these dynamics is often understated. In this review, we address the various mechanisms of linker rotation reported in the growing collection of literature, followed by a highlight of the methods currently used in their study, and we conclude with the impacts that such dynamics have on existing and future applications.
Highlights
Metal–organic frameworks (MOFs) are ordered arrays of polytopic organic ligands, commonly called linkers, interconnecting metal-based inorganic building units via coordination bonds
The fact that rotation was only possible in the activated framework provides evidence of the importance of MOF porosity in achieving dynamic Metal–organic rotaxane frameworks (MORFs)
Damron et al [53] introduced the use of a different nuclear magnetic resonance (NMR) method to study linker dynamics in MOFs: a separated local field (SLF) type known as DIPSHIFT
Summary
Metal–organic frameworks (MOFs) are ordered arrays of polytopic organic ligands, commonly called linkers, interconnecting metal-based inorganic building units via coordination bonds. Rotational mobility plays a central role in the fascinating behavior of the zeolitic imidazolate framework ZIF-8 [4,5] The linkers in this framework are known to aid in the diffusion of surprisingly large guest molecules through the otherwise small micropores, by swinging, or partially rotating. This gate-opening, as we shall see, Noacncoumrasteirnialas 2c0o1n9,s9i,d3e3r0able variety of different rotor MOFs. the possibility to manufacture tailor-made molecular rotors in an ordered scaffold ootpheenrswuispeasmmuallltimtuidceroopfoorpetsi,obnys sfowrinnogvinegl ,aoprplpicaarttiioanllsy, rsoutcahtiansgs.eTnhsoisrsg,astteim-ouplein-riensgp,oanssiwvee mshaatlelrsiaeles, o[6c]c,uarnsdincraycsotanlsliindeermabolleecvualraiertmy aocfhdiinffeesr[e7n]t.
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