Lanthanide-loaded paramagnetic liposomes as switchable magnetically oriented nanovesicles

Osmotically shrunken liposomes loaded with paramagnetic lanthanide(III) complexes orient in a static magnetic field according to the sign of their magnetic susceptibility anisotropy (Delta chi). The magnitude and sign of Delta chi are modulated. by the magnetic properties of the Ln(III) ion, by the structural characteristics of the metal chelate, and by the stereochemical arrangement of the lipophilic substituents.