A novel poly[2]-catenane containing rigid catenane subunits connected
by semirigid spacers has been synthesized. This new macromolecular arc
hitecture is the second example of a polymer containing topological bo
nds in the main chain. The poly[2]-catenane structure was proved by sp
ectroscopic methods, especially H-1 NMR, IR and MALDI-TOF The polymer
is thermally stable up to 380 degrees C and shows a high glass transit
ion temperature of ca. 265 degrees C.