Solvent-dependent dual emission processes in charge-transfer excited states of phenothiazine-triphenyltriazine conformers

Tomohiro Ryu, Kiyoshi Miyata, Masaki Saigo, Yuushi Shimoda, Yoichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi, Ken Onda

Research output: Contribution to journalArticlepeer-review

Abstract

The solvent effects were studied on charge-transfer excited states in a donor–acceptor-type luminescent material, phenothiazine-triphenyltriazine, which has two distinct conformers: quasi-coplanar and perpendicular conformers. The solvent dielectric permittivity dependence of the steady-state photoluminescence spectra using solvent mixtures of toluene and tetrahydrofuran (THF) indicated that the two conformers have nearly identical excited-state dipole moments. The time-resolved photoluminescence and transient absorption spectra in toluene and THF showed different solvent dependences for the two conformers. A detailed analysis of these time-resolved spectra revealed solvent-dependent emission processes in the two conformers.

Original languageEnglish
Article number140155
JournalChemical Physics Letters
Volume809
DOIs
Publication statusPublished - Dec 16 2022

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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