Polyketones, polysulfones and polyamides are presented that contain di
fferent types of functional groups located in the main chain or in the
side chain of the polycondensates. Functional grous are distyrylpyrid
ine, cinnamic acids, and ester groups. One example is presented dealin
g with enzymatically catalyzed polycondensation of aniline derivative
bearing a chalcon-function. Some interest is focused on photochemical
crosslinking of the materials that are suitable to prepare semipermeab
le membranes. The successful synthesis of polymerizable dendrimers bas
ed on aspartic acid is also described. Finally, the potential synthesi
s of polyamides with large ring-components in the main chain is discus
sed.