Prompted by the increasing interest in cation complexes of supramolecular host molecules, herein we report the synthesis and CD studies on primary aralkylammonium and metal ion (Na+, K+, Mg2+, Ca2+ and Ag+, Zn2+, Ni2+, Cd 2+, Pb2+) complexes of acridono-18-crown-6 hosts 5, a new family of macrocyclic ligands. CD studies in acetonitrile revealed the selective binding of Pb2+ ions by chiral acridono-18-crown-6 ligands. The CD and corresponding UV spectra show two isosbestic points. The isosbestic points are indicative of a rapid equilibrium of two tautomeric forms, the acridino and hydroxy-acridine, while the other species is the Pb2+ complex. This suggestion is also supported by the change in the FTIR spectra.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry