A membrane including a polyarylether having amide functionality. The
polyarylether having amide functionality includes units from at least one
of structure I or structure II:
##STR00001## R.sub.1 and R.sub.2 are separate groups or are covalently
connected to form a cyclic moiety; R.sub.1 and R.sub.2 are each,
independently, hydrogen, C.sub.1-20 alkyl, C.sub.3-C.sub.30 aryl or a
substituted C.sub.3-30 aryl; R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7
and R.sup.8 are each, independently, a nitro group, C.sub.1-C.sub.12
alkyl, C.sub.3-C.sub.30 aryl or a combination; Y is hydrogen, C.sub.1-20
alkyl or C.sub.3-C.sub.30 aryl; k is from about 0 to about 10; a, b, c,
d, e and f are each, independently, 0, 1, 2, 3 or 4; and m and n are
each, independently, 0 or 1.