A bis-terpyridine monomer includes a first terpyridyl substituent (A), a second terpyridyl substituent (B), and a spacer that contains at least one benzene ring and links the first terpyridyl substituent (A) and the second terpyridyl substituent (B). The bis-terpyridine monomer is represented by the following formula (10): where X1 is a halogen; and R1, R2, R3 and R4 are each independently a halogen atom, an aryl group or an alkyl group.