Transformable Nanostructures of Platinum-Containing Organosilane Hybrids: Non-covalent Self-Assembly of Polyhedral Oligomeric Silsesquioxanes Assisted by Pt···Pt and π–π Stacking Interactions of Alkynylplatinum(II) Terpyridine Moieties

An alkynylplatinum­(II) terpyridine
complex functionalized with
polyhedral oligomeric silsesquioxanes (POSS) moieties has been demonstrated
to exhibit self-association behavior to give various distinguishable
nanostructures with interesting morphological transformation from
rings to rods in response to solvent conditions through the stabilization
of Pt···Pt and π–π stacking interactions
as well as hydrophobic–hydrophobic interactions. These changes
can be systemically controlled by varying the solvent composition
and have been studied by 1H NMR, electron microscopy, UV–vis
absorption, and emission spectroscopies.