Monolayer characteristics of ytterbium and samarium phthalocyanines (YbPc2
and SmPc2 have been investigated by surface pressure and surface potential
isotherms. It has been shown that the metal ion in the phthalocyanines can
cause marked differences in the monolayer properties. The different monolay
er characteristics of YbPc2 and SmPc2 may possibly be ascribed to either th
e extent of. aggregation or the symmetry of the metallophthalocyanines.