Fast Molecular Rotor Dynamics Modulated by Guest Inclusion in a Highly Organized Nanoporous Organosilica

Abstract

Rotor speed regulation in the hybrid walls of porous p-phenylenesilica can be achieved by guest uptake and removal. A graduation from slow to ultrafast motional regimes (k=104–108 s−1) can be experienced by the molecular rotors depending on guest nature and temperature, as detected by solid-state spin-echo 2H NMR spectroscopy (see picture).