Cyclic intramolecular proton transfer dynamics of polyquinoline

Hyunung Yu, Seung Do Hong, Sehoon Kim, Soo Young Park, Du Jeon Jang

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The excited-state intramolecular proton transfer and following reverse ground-state proton transfer of photoluminescent polyquinoline are investigated by measuring temperature-dependent fluorescence and transient absorption kinetic profiles. The transfer at the lowest excited singlet state takes place within 6 ps via a preexisting intramolecular hydrogen bond with a negligibly small activation energy. On the other hand, the reverse transfer at the ground state occurs in the time scale of 10 us. The rapid proton transfer cycle of the polymer is of great interest due to its implications for optoelectronic devices such as dye lasers.

Original languageEnglish
Pages (from-to)305-308
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 2002
EventProceedings of the Korea-Japan Joint Forum on Organic Materials for Electronics and Photonics (KJF2001) - Seoul, Korea, Republic of
Duration: 2001 Sept 252001 Sept 27


  • Excited-state proton transfer
  • Photoluminescence
  • Polyquinoline
  • Reverse ground-state proton transfer
  • Transient absorption

ASJC Scopus subject areas

  • Condensed Matter Physics


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