Formation of RACK- and grid-type metallosupramolecular architectures and generation of molecular motion by reversible uncoiling of helical ligand strands.
The interaction of appropriate metal ions (Pb(II), Zn(II)) with helical ligand strands, obtained by hydrazone polycondensation, generates polymetallic supramolecular architectures of rack and grid types, by uncoiling of the ligand. The interconversion between the helical free ligand and the linearly extended ligand in the complexes produces reversible ion-induced, nanomechanical molecular motions of large amplitude. It has been integrated in an acid-base neutralisation fuelled process, which links the extension/contraction of the ligand strands to alternating changes in pH.
Stadler
Adrian-Mihail
AM
Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, 67000 Strasbourg, France. lehn@isis.u-strasbg.fr
Kyritsakas
Nathalie
N
Graff
Roland
R
Lehn
Jean-Marie
JM
D000075202:Contraindications; D007477:Ions; D007854:Lead / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009038:Motion; D009942:Organometallic Compounds / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
D007477:Ions; D008024:Ligands; D009942:Organometallic Compounds; D007854:Lead; D015032:Zinc