Self-discriminating self-assembly of dinuclear heterochiral rhombs from Tröger's base derived bis(pyridyl) ligands.
Five racemic dissymmetric bis(pyridyl) ligands based on 2,8- or 3,9-difunctionalised Tröger's base derivatives have been synthesised. Only those derived from a 2,8-difunctionalised scaffold were found to undergo selective self-assembly to discrete self-assembled dinuclear metallosupramolecular aggregates of rhomboid shape upon coordination to cis-protected Pd(2+) or Pt(2+) ions, as evidenced by ESI mass spectrometry, NMR spectroscopy and single-crystal X-ray diffraction. Interestingly, these processes were found to be highly diastereoselective leading to the formation of C(2v)-symmetric heterochiral assemblies in a self-discriminating manner.
Weilandt
Torsten
T
University of Bonn, Kekulé-Institute of Oganic Chemistry and Biochemistry, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
Kiehne
Ulf
U
Bunzen
Jens
J
Schnakenburg
Gregor
G
Lützen
Arne
A