Intermolecular Structural Change for Thermoswitchable Polymeric Photosensitizer

Wooram Park, Sin Jung Park, Soojeong Cho, Heejun Shin, Young Seok Jung, Byeongdu Lee*, Kun Na, Dong Hyun Kim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


We developed a thermoswitchable polymeric photosensitizer (T-PPS) by conjugating PS (Pheophorbide-a, PPb-a) to a temperature-responsive polymer backbone of biocompatible hydroxypropyl cellulose. Self-quenched PS molecules linked in close proximity by π-π stacking in T-PPS were easily transited to an active monomeric state by the temperature-induced phase transition of polymer backbones. The temperature-responsive intermolecular interaction changes of PS molecules in T-PPS were demonstrated in synchrotron small-angle X-ray scattering and UV-vis spectrophotometer analysis. The T-PPS allowed switchable activation and synergistically enhanced cancer cell killing effect at the hyperthermia temperature (45 °C). Our developed T-PPS has the considerable potential not only as a new class of photomedicine in clinics but also as a biosensor based on temperature responsiveness.

Original languageEnglish (US)
Pages (from-to)10734-10737
Number of pages4
JournalJournal of the American Chemical Society
Issue number34
StatePublished - Aug 31 2016

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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