The present invention provides for a compound having the following
structure: Zr(O.sub.3PZ.sub.qY.sub.nX).sub.2-m(03PR).sub.m, wherein X=a
functional group such as CO.sub.2H, PO(OH).sub.2, and SO.sub.3H, and
SO.sub.2NHSO.sub.2W, wherein W=aryl of 6 to 10 carbon atoms or Y;
Y=perfluoro-linear, branched or cyclic alkylene group, wherein the
alkylene is 1-20 carbon atoms, or a fluorinated group containing at least
one substituent selected from the group consisting of oxygen, chlorine
and bromine; Z=alkylene of 1-12 carbon atoms, aryl of 6-10 carbon atoms,
or a heterocyclic aryl group of 3-10 carbons atoms; R=alkyl of 1-12
carbon atoms, aryl of 6-10 carbon atoms, substituted alkyl, or
substituted aryl, wherein the substituent is selected from the group
consisting of F, Cl, perfluoroalkyl, alkyl of 1-12 carbon atoms and aryl
of 6-10 carbon atoms; n=0 or 1; q=0 or 1; and m=0 to 1.5; with the
proviso that when n=0, and q=1, Z=at least one heterocyclic group having
3 to 10 carbon atoms, 1 to 5 nitrogen atoms and 0 to 4 oxygen atoms. The
invention also provides a polymer electrolyte membrane, a catalyst coated
membrane and a fuel cell having this compound.