This paper describes three topics on the pi-conjugated ferrocene oligomers
and polymers; the first is the dependence of intervalence-transfer bands fo
r mixed-valence oligo(1,1'-dihexylferrocenylene)s on the oxidation number a
nd the number of ferrocene units, the second is synthesis of ate-bridged fe
rrocene oligomers and a polymer and electrochemical and optical analysis of
internuclear electronic interactions in their mixed-valence states and the
third is synthesis, redox behaviors and electrodeposition of oligoferrocen
ylene-modified gold clusters.