Controlled Diffusion of Photoswitchable Receptors by Binding Anti-electrostatic Hydrogen-Bonded Phosphate Oligomers
Thomas S. C. MacDonald, Ben L. Feringa, William S. Price, Sander J. Wezenberg, Jonathon E. Beves
Abstract
hydrogen bonding interactions at millimolar concentrations in DMSO. Diffusion NMR measurements supported formation of these oligomers, which can be bound by photoswitchable anion receptors to form large bridged assemblies of approximately three times the volume of the unbound receptor. Photoisomerization of the oligomer-bound receptor causes a decrease in diffusion coefficient of up to 16%, corresponding to a 70% increase in effective volume. This new approach to external control of diffusion opens prospects in controlling molecular transport using light.
Topics & Concepts
ChemistryPhotoisomerizationOligomerDiffusionIsomerizationHydrogen bondPhosphateReceptorHydrogenMoleculeIonCrystallographyPolymer chemistryOrganic chemistryThermodynamicsCatalysisBiochemistryPhysicsMolecular Sensors and Ion DetectionPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research