Highly isotactic poly(N-butenyl-carbazole): Synthesis,characterization,and optical properties

The synthesis of isotactic poly(n-butenyl-carbazole) (i-pbk) by using homogeneous isospecific ziegler-natta catalytic system is reported. the achieved polymer is crystalline and shows,to dsc and x-ray analysis,two distinct crystalline phases. i-pbk ftir spectrum and x-ray diffraction pattern are compared with those of poly(n-vinylcarbazole) (pvk). the observed differences are tentatively associated with higher flexibility of the i-pbk chains due to the alkylene group connecting the carbazole group to the main chain. i-pbk optical properties are also compared with those of pvk and isotactic poly(n-pentenyl-carbazole) (i-ppk),a higher homologue of i-pbk recently used as emitting layer in organic light emitting diodes (oleds) showing white light emission. the close similarity of the fluorescence spectra of i-pbk and i-ppk is a promising basis for optical applications of this polymer. © 2016 antonio botta et al.