Effect of interchain separation on the photoinduced absorption spectra of polycarbazolyldiacetylenes

Davide Comoretto, Ivana Moggio, C. Dell'Erba, C. Cuniberti, Giovanna Dellepiane, Laura Rossi, Mario Ettore Giardini, Alessandro Borghesi

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Abstract

The photoinduced absorption spectra of a novel polycarbazolyldiacetylene with long aliphatic chains on the carbazolyl side groups are measured and compared with those of the unsubstituted polyDCHD. The two polymers in the blue form exhibit very similar electronic absorption spectra and Raman frequencies. This fact indicates that the conjugation length of the polydiacetylene backbone is not too affected by the long substituents. In contrast, the near steady-state photoinduced absorption spectra show that different photogeneration mechanisms are involved in the two polymers. This result can be ascribed to the role played by the interchain distance in the dynamics of the relaxation processes in polydiacetylenes.
Original languageEnglish
Pages (from-to)16357-16360
Number of pages4
JournalPhysical Review B
Volume54
DOIs
Publication statusPublished - 1996

Keywords

  • polycarbazolyldiacetylenes
  • interchain separation
  • photoinduced
  • absorption spectra

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