title: Molecular exchange through vesicle membranes: a pulsed field gradient nuclear magnetic resonance study.
abstract: The permeability of block copolymer vesicles is studied using pulsed field gradient nuclear magnetic resonance spectroscopy together with a numerical data analysis procedure. Polyethylene oxide molecules of various molecular masses are used to sample the permeability of the vesicle membrane by observing the trans-membrane exchange process under equilibrium conditions. For shorter polyethylene oxide chains, the analysis yields a nearly linear dependence of the logarithmic trans-membrane exchange rate on the hydrodynamic radius of the sample molecules.
authors.affiliation: Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim, Germany.
authors.forename: Anja
authors.initials: A
authors.lastname: Rumplecker
authors.forename: Stephan
authors.initials: S
authors.lastname: Förster
authors.forename: Manfred
authors.initials: M
authors.lastname: Zähres
authors.forename: Christian
authors.initials: C
authors.lastname: Mayer