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Molecular Rotors in Porous Organic Frameworks
Author(s) -
Comotti Angiolina,
Bracco Silvia,
Ben Teng,
Qiu Shilun,
Sozzani Piero
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201309362
Subject(s) - rotation around a fixed axis , porosity , rotational dynamics , dipole , ferroelectricity , materials science , molecular machine , nanotechnology , actuator , variety (cybernetics) , constructive , molecular dynamics , computer science , chemistry , mechanical engineering , dielectric , optoelectronics , engineering , molecule , composite material , computational chemistry , organic chemistry , artificial intelligence , process (computing) , operating system
Porous organic frameworks perform a variety of functions, owing to their extremely large surface areas, but the dynamics of the structural elements have never been explored. Our discovery of ultra‐fast molecular rotors (10 6 Hz at 225 K) in their architectures allows us to look at them from a new perspective. The constructive elements are robust struts and rapid rotors, resulting in a dynamic material whose motion can be frozen or released at will. The rotational motion can be actively regulated in response to guests. As the temperature is increased, the rotors spin ever faster, approaching free‐rotational diffusion at 550 K. The unusual combination of remarkable nanoporosity with fast dynamics is intriguing for engineering oscillating dipoles and producing responsive materials with switchable ferroelectricity, and for applications spanning from sensors to actuators, which capture and release chemicals on command.