Controllable columnar organization of positively charged polycyclic aromatic hydrocarbons by choice of counterions.
A novel columnar organization of ionic complexes based on 9-phenylbenzo[1,2]quinolizino[3,4,5,6-fed]phenanthridinylium (PQP) has been achieved via ionic self-assembly. These complexes represent the first family of polycyclic aromatic hydrocarbons containing a large charged aromatic core with controllable columnar organization in both the crystalline and liquid-crystalline phases. The single-crystal structure of the ionic complex with a benzenesulfonate anion exhibits a staggered dimer arrangement of PQP cations that further establishes columnar superstructures. The use of sulfonate anions with long alkyl tails leads to well-ordered discotic columnar mesophases with an identical staggered packing of the PQP cations.
Wu
Dongqing
D
Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.
Pisula
Wojciech
W
Enkelmann
Volker
V
Feng
Xinliang
X
Müllen
Klaus
K