Synthesis of a pillar[5]arene dimer by co-oligomerization and its complexation with n-octyltrimethyl ammonium hexafluorophosphate

A pillar[5]arene dimer was successfully prepared by co-oligomerization of 1,4-dimethoxybenzene and 1.6-bis(4-butoxyphenoxy)hexane. It was demonstrated that it forms 1:2 complexes with n-octyltrimethyl ammonium hexafluorophosphate both in chloroform and the gaseous state. A Scatchard plot indicated that the complexation between them is statistical with an average association constant of 6.0 (+/- 0.4) x 10(2) M-1 in chloroform. (C) 2011 Elsevier Ltd. All rights reserved.