Using electron spectroscopy, X-ray photoelectron spectroscopy, and ESR
spectroscopy, the blue forms of bisphthalocyanines of rare-earth elem
ents were found to have structures of sandwich-type complexes with iso
electronic phthalocyanine ligands linked with tetravalent metal ions,
[Pc(2-)Ln(4+)Pc(2-)](0). A comparative spectral and electrochemical st
udy of the blue and green forms of tert-butyl-substituted bisphthalocy
anines was carried out for almost the whole series of rare-earth metal
s. Lutetium octa(perfluoro-tert-butyl)- and perchlorobisphthalocyanine
s were synthesized for the first time.