title: Controllable columnar organization of positively charged polycyclic aromatic hydrocarbons by choice of counterions.
abstract: 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.
authors: Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.
authors: Dongqing
authors: D
authors: Wu
authors: Wojciech
authors: W
authors: Pisula
authors: Volker
authors: V
authors: Enkelmann
authors: Xinliang
authors: X
authors: Feng
authors: Klaus
authors: K
authors: Müllen