A composition of matter comprising the thin film interfacial polymerization reaction product of MF Xm and {HEAD ~ NYn} wherein {TAIL ~ MF} is a moiety having chemical species specific reversibly complexing complexing sites, N is a moiety not having any chemical species specific complexing sites, X and Y are groups that are mutually reactive in a condensation reaction, and m and n are integers ≧2 
wherein
A composition of matter comprising the thin film interfacial polymerization reaction product of MF Xm and { HEAD ~ NYn } wherein { TAIL ~ MF } is a moiety having chemical species specific reversibly complexing complexing sites , N is a moiety not having any chemical species specific complexing sites , X and Y are groups that are mutually reactive in a condensation reaction , and m and n are integers ≧2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH