Controlled Excited-State Dynamics and Enhanced Fluorescence Property of Tetrasulfone[9]helicene by a Simple Synthetic Process

Yuki Yamamoto, Hayato Sakai, Junpei Yuasa, Yasuyuki Araki, Takehiko Wada, Tomo Sakanoue, Taishi Takenobu, Tsuyoshi Kawai, Taku Hasobe

    Research output: Contribution to journalArticle

    23 Citations (Scopus)

    Abstract

    Tetrasulfone[9]helicene (PTSH) was newly synthesized to improve and evaluate its fluorescence and excited-state dynamics through a single-step oxidation reaction of tetrathia[9]helicene (PTTH). In electrochemical measurements, the reduction potential of PTSH was shifted in a positive direction by approximately 1.0 V when compared to that of PTTH because of its electron-accepting sulfone units. The results of the electrochemical measurements agree with the energy levels calculated by density functional theory (DFT) methods and steady-state spectroscopic measurements. Furthermore, a significant enhancement of the absolute fluorescence quantum yield (ΦFL) was achieved. The absolute fluorescence quantum yield of PTSH attained 0.27, which is approximately 10 times larger than that of PTTH (ΦFL = 0.03). Such an enhancement of ΦFL can be successfully explained by the corresponding kinetic comparison. The reason is mainly the increased energy gap ΔEST between the lowest singlet (S1) and triplet (T1) excited states. Finally, excellent circularly polarized luminescence of PTSH was also observed. The value of the anisotropy factor gCPL was estimated to be 8.3 × 10-4 in PTSH.

    Original languageEnglish
    Pages (from-to)7421-7427
    Number of pages7
    JournalJournal of Physical Chemistry C
    Volume120
    Issue number13
    DOIs
    Publication statusPublished - 2016 Apr 21

    Fingerprint

    Excited states
    Fluorescence
    Quantum yield
    fluorescence
    excitation
    Sulfones
    sulfones
    augmentation
    Electron energy levels
    Density functional theory
    Luminescence
    Energy gap
    Anisotropy
    energy levels
    luminescence
    density functional theory
    Oxidation
    oxidation
    anisotropy
    Kinetics

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Electronic, Optical and Magnetic Materials
    • Surfaces, Coatings and Films
    • Energy(all)

    Cite this

    Controlled Excited-State Dynamics and Enhanced Fluorescence Property of Tetrasulfone[9]helicene by a Simple Synthetic Process. / Yamamoto, Yuki; Sakai, Hayato; Yuasa, Junpei; Araki, Yasuyuki; Wada, Takehiko; Sakanoue, Tomo; Takenobu, Taishi; Kawai, Tsuyoshi; Hasobe, Taku.

    In: Journal of Physical Chemistry C, Vol. 120, No. 13, 21.04.2016, p. 7421-7427.

    Research output: Contribution to journalArticle

    Yamamoto, Y, Sakai, H, Yuasa, J, Araki, Y, Wada, T, Sakanoue, T, Takenobu, T, Kawai, T & Hasobe, T 2016, 'Controlled Excited-State Dynamics and Enhanced Fluorescence Property of Tetrasulfone[9]helicene by a Simple Synthetic Process', Journal of Physical Chemistry C, vol. 120, no. 13, pp. 7421-7427. https://doi.org/10.1021/acs.jpcc.6b01123
    Yamamoto, Yuki ; Sakai, Hayato ; Yuasa, Junpei ; Araki, Yasuyuki ; Wada, Takehiko ; Sakanoue, Tomo ; Takenobu, Taishi ; Kawai, Tsuyoshi ; Hasobe, Taku. / Controlled Excited-State Dynamics and Enhanced Fluorescence Property of Tetrasulfone[9]helicene by a Simple Synthetic Process. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 13. pp. 7421-7427.
    @article{8d3202bccbee4d5f82e852519a1a6ad2,
    title = "Controlled Excited-State Dynamics and Enhanced Fluorescence Property of Tetrasulfone[9]helicene by a Simple Synthetic Process",
    abstract = "Tetrasulfone[9]helicene (PTSH) was newly synthesized to improve and evaluate its fluorescence and excited-state dynamics through a single-step oxidation reaction of tetrathia[9]helicene (PTTH). In electrochemical measurements, the reduction potential of PTSH was shifted in a positive direction by approximately 1.0 V when compared to that of PTTH because of its electron-accepting sulfone units. The results of the electrochemical measurements agree with the energy levels calculated by density functional theory (DFT) methods and steady-state spectroscopic measurements. Furthermore, a significant enhancement of the absolute fluorescence quantum yield (ΦFL) was achieved. The absolute fluorescence quantum yield of PTSH attained 0.27, which is approximately 10 times larger than that of PTTH (ΦFL = 0.03). Such an enhancement of ΦFL can be successfully explained by the corresponding kinetic comparison. The reason is mainly the increased energy gap ΔEST between the lowest singlet (S1) and triplet (T1) excited states. Finally, excellent circularly polarized luminescence of PTSH was also observed. The value of the anisotropy factor gCPL was estimated to be 8.3 × 10-4 in PTSH.",
    author = "Yuki Yamamoto and Hayato Sakai and Junpei Yuasa and Yasuyuki Araki and Takehiko Wada and Tomo Sakanoue and Taishi Takenobu and Tsuyoshi Kawai and Taku Hasobe",
    year = "2016",
    month = "4",
    day = "21",
    doi = "10.1021/acs.jpcc.6b01123",
    language = "English",
    volume = "120",
    pages = "7421--7427",
    journal = "Journal of Physical Chemistry C",
    issn = "1932-7447",
    publisher = "American Chemical Society",
    number = "13",

    }

    TY - JOUR

    T1 - Controlled Excited-State Dynamics and Enhanced Fluorescence Property of Tetrasulfone[9]helicene by a Simple Synthetic Process

    AU - Yamamoto, Yuki

    AU - Sakai, Hayato

    AU - Yuasa, Junpei

    AU - Araki, Yasuyuki

    AU - Wada, Takehiko

    AU - Sakanoue, Tomo

    AU - Takenobu, Taishi

    AU - Kawai, Tsuyoshi

    AU - Hasobe, Taku

    PY - 2016/4/21

    Y1 - 2016/4/21

    N2 - Tetrasulfone[9]helicene (PTSH) was newly synthesized to improve and evaluate its fluorescence and excited-state dynamics through a single-step oxidation reaction of tetrathia[9]helicene (PTTH). In electrochemical measurements, the reduction potential of PTSH was shifted in a positive direction by approximately 1.0 V when compared to that of PTTH because of its electron-accepting sulfone units. The results of the electrochemical measurements agree with the energy levels calculated by density functional theory (DFT) methods and steady-state spectroscopic measurements. Furthermore, a significant enhancement of the absolute fluorescence quantum yield (ΦFL) was achieved. The absolute fluorescence quantum yield of PTSH attained 0.27, which is approximately 10 times larger than that of PTTH (ΦFL = 0.03). Such an enhancement of ΦFL can be successfully explained by the corresponding kinetic comparison. The reason is mainly the increased energy gap ΔEST between the lowest singlet (S1) and triplet (T1) excited states. Finally, excellent circularly polarized luminescence of PTSH was also observed. The value of the anisotropy factor gCPL was estimated to be 8.3 × 10-4 in PTSH.

    AB - Tetrasulfone[9]helicene (PTSH) was newly synthesized to improve and evaluate its fluorescence and excited-state dynamics through a single-step oxidation reaction of tetrathia[9]helicene (PTTH). In electrochemical measurements, the reduction potential of PTSH was shifted in a positive direction by approximately 1.0 V when compared to that of PTTH because of its electron-accepting sulfone units. The results of the electrochemical measurements agree with the energy levels calculated by density functional theory (DFT) methods and steady-state spectroscopic measurements. Furthermore, a significant enhancement of the absolute fluorescence quantum yield (ΦFL) was achieved. The absolute fluorescence quantum yield of PTSH attained 0.27, which is approximately 10 times larger than that of PTTH (ΦFL = 0.03). Such an enhancement of ΦFL can be successfully explained by the corresponding kinetic comparison. The reason is mainly the increased energy gap ΔEST between the lowest singlet (S1) and triplet (T1) excited states. Finally, excellent circularly polarized luminescence of PTSH was also observed. The value of the anisotropy factor gCPL was estimated to be 8.3 × 10-4 in PTSH.

    UR - http://www.scopus.com/inward/record.url?scp=84964545625&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84964545625&partnerID=8YFLogxK

    U2 - 10.1021/acs.jpcc.6b01123

    DO - 10.1021/acs.jpcc.6b01123

    M3 - Article

    VL - 120

    SP - 7421

    EP - 7427

    JO - Journal of Physical Chemistry C

    JF - Journal of Physical Chemistry C

    SN - 1932-7447

    IS - 13

    ER -