The synthesis of phthalocyanines la and Ib appended with four glycoluril mo
dules is presented. H-1 NMR spectroscopy showed that la and Ib self-assembl
e by means of hydrogen bonding to form discrete dimers. Capsule formation i
s solvent dependent where the dimeric assembly is most pronounced in aromat
ic solvents. (C) 2000 Elsevier Science Ltd. All rights reserved.