Fluorene-dibenzothiophene copolymers

Several random fluorene-dibenzothiophene copolymers 584a-e (03JPS (A)(41)1521 03MI1351) have been reported. 

Several random fluorene-dibenzothiophene copolymers 67a-e [106,107] have been reported. The meta linkage in the dibenzothiophene in copolymers 67a-e hinders the conjugation, resulting in a hypsochromic shift of the emission bands to the deep-blue color region (kmax 420 and 440 nm) [106]. Furthermore, hindered conjugation and hindered n-aggregation suppress the parasitic green emission at 520 nm in the solid state of the polymer, often observed in polyfluorenes. 

---