
10 Poly(oxadiazole)s
Poly(1,3,4-oxadiazole)s (PODA)s were first
described in 1961 [1]. The oxadiazole moieties are
mostly linked by aromatic units, although PODA
with aliphatic linkages have been described, with
considerably lower melting points. Most common
is the 1,3,4-oxadiazole isomer; related compounds
have the 1,2,4-oxadiazole ring, 1,2,5-oxadiazole
ring, thiazole ring, oxazole ring, isothiazole ring,
isoxazole ring, and thiophene ring, respectively, in
the backbone. Owing to their interesting properties,
PODAs find use in advanced applications.
The class of PODAs has been reviewed [2–4]. As
well as in polymers, 1,3,4-oxadiazole derivatives are
used