Ultrafast rotation in an amphidynamic crystalline metal organic framework.

ABSTRACT: Amphidynamic crystals are an emergent class of condensed phase matter designed with a combination of lattice-forming elements linked to components that display engineered dynamics in the solid state. Here, we address the design of a crystalline array of molecular rotors with inertial diffusional rotation at the nanoscale, characterized by the absence of steric or electronic barriers. We solved this challenge with 1,4-bicyclo[2.2.2]octane dicarboxylic acid (BODCA)-MOF, a metal-organic framework (MOF) built with a high-symmetry bicyclo[2.2.2]octane dicarboxylate linker in a Zn₄O cubic lattice. Using spin-lattice relaxation ¹H solid-state NMR at 29.49 and 13.87 MHz in the temperature range of 2.3-80 K, we showed that internal rotation occurs in a potential with energy ba

SUBMITTER: Vogelsberg CS 

PROVIDER: S-EPMC5748175 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature