Polymerization ofN-Vinylcarbazole in the Presence of Organic Salts with Chiral or Stereodifferentiating Ligands

Organic salts as initiators [A∗ +B−: Ph∗3C+ClO− 4, Ph∗3C+SbCl− 6, (−)Sp∗ +ClO− 4, and (−)(Sp)∗2 3+(ClO4)− 3] and catalysts [A +B∗−: (+)CSA∗; A∗ +B∗−: ph∗3C+(+)CSA∗− and (−)Sp∗+(+)CSA∗−] are prepared and characterized by the dissociation constant (K d), fraction of free ions (α), and specific rotation. The asymmetrically stereoselective induction of the initiators and catalysts in the polymerization of N-vinylcarbazole is in the order A∗ +B∗− > A +B∗− > A∗ +B−. The specific rotations of the poly(N-vinylcarbazole) (PVCZ)s obtained are generally in this order.