Polyphosphazenes and metal phosphonates have offered better opportunit
ies than other organoinorganic polymers as starting polymers for the s
ynthesis of sulfonated derivatives. Sulfonated organic polymers are we
ll established in many technological applications and are covered by s
everal literature reviews. Organoinorganic sulfonated polymers are rat
her new and have never been considered as a self-standing class. Yet s
ince ion-containing polymers and organoinorganic polymers are expandin
g research fields, organoinorganic sulfonated polymers are likely to a
ttain more attention in the future. The present review therefore cover
s the synthesis, structure, and properties of sulfonated polyphosphaze
nes and sulfonated metal phosphonates, in order to indicate what may b
e expected from organoinorganic polymers functionalized in this fashio
n.