Engineering coordinated rotational motion in porous architectures enables the fabrication of molecular machines in solids. A flexible two-fold interpenetrated pillared Metal-Organic Framework precisely organizes fast mobile elements such as bicyclopentane (BCP) (107 Hz regime at 85 K), two distinct pyridyl rotors and E-azo group involved in pedal-like motion. Reciprocal sliding of the two sub-networks, switched by chemical stimuli, modulated the sizes of the channels and finally the overall dynamical machinery. Actually, iodine-vapor adsorption drives a dramatic structural rearrangement, displacing the two distinct subnets in a concerted piston-like motion. Unconventionally, BCP mobility increases, exploring ultra-fast dynamics (107 Hz) at temperatures as low as 44 K, while the pyridyl rotors diverge into a faster and slower dynamical regime by symmetry lowering. Indeed, one pillar ring gained greater rotary freedom as carried by the azo-group in a crank-like motion. A peculiar behavior was stimulated by pressurized CO2, which regulates BCP dynamics upon incremental site occupation. The rotary dynamics is intrinsically coupled to the framework flexibility as demonstrated by complementary experimental evidence (multinuclear solid-state NMR down to very low temperatures, synchrotron radiation XRD, gas sorption) and computational modelling, which helps elucidate the highly sophisticated rotor-structure interplay.

Perego, J., Daolio, A., Bezuidenhout, C., Piva, S., Prando, G., Costarella, B., et al. (2024). Solid State Machinery of Multiple Dynamic Elements in a Metal–Organic Framework. ANGEWANDTE CHEMIE. INTERNATIONAL EDITION, 63(10 (March 4, 2024)), 1-9 [10.1002/anie.202317094].

Solid State Machinery of Multiple Dynamic Elements in a Metal–Organic Framework

Perego J.
Primo
;
Daolio A.
Secondo
;
Bezuidenhout C. X.;Piva S.;Sozzani P.;Bracco S.
;
Comotti A.
2024

Abstract

Engineering coordinated rotational motion in porous architectures enables the fabrication of molecular machines in solids. A flexible two-fold interpenetrated pillared Metal-Organic Framework precisely organizes fast mobile elements such as bicyclopentane (BCP) (107 Hz regime at 85 K), two distinct pyridyl rotors and E-azo group involved in pedal-like motion. Reciprocal sliding of the two sub-networks, switched by chemical stimuli, modulated the sizes of the channels and finally the overall dynamical machinery. Actually, iodine-vapor adsorption drives a dramatic structural rearrangement, displacing the two distinct subnets in a concerted piston-like motion. Unconventionally, BCP mobility increases, exploring ultra-fast dynamics (107 Hz) at temperatures as low as 44 K, while the pyridyl rotors diverge into a faster and slower dynamical regime by symmetry lowering. Indeed, one pillar ring gained greater rotary freedom as carried by the azo-group in a crank-like motion. A peculiar behavior was stimulated by pressurized CO2, which regulates BCP dynamics upon incremental site occupation. The rotary dynamics is intrinsically coupled to the framework flexibility as demonstrated by complementary experimental evidence (multinuclear solid-state NMR down to very low temperatures, synchrotron radiation XRD, gas sorption) and computational modelling, which helps elucidate the highly sophisticated rotor-structure interplay.
Articolo in rivista - Articolo scientifico
Crystal Engineering, Metal-Organic Frameworks, Molecular Dynamics, Molecular Rotor, Solid State NMR;
English
18-gen-2024
2024
63
10 (March 4, 2024)
1
9
e202317094
reserved
Perego, J., Daolio, A., Bezuidenhout, C., Piva, S., Prando, G., Costarella, B., et al. (2024). Solid State Machinery of Multiple Dynamic Elements in a Metal–Organic Framework. ANGEWANDTE CHEMIE. INTERNATIONAL EDITION, 63(10 (March 4, 2024)), 1-9 [10.1002/anie.202317094].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/466238
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