Mohajeri, M.; Hossein Rounaghi, G.; Sedagat, S. Therodynamic Studies on Complexation of Cu2+, Ag+ and Tl+ Metal Cations With 4?,,4?,(5?)-Ditert-Butyldibenzyl-18-Crown-6 in Acetonitrile- Dimethylformamide Binary Solutions. ajc 2010, 20, 6163-6170.