Modulating Photo- and Electroluminescence in a Stimuli-Responsive π-Conjugated Donor–Acceptor Molecular System

Kohei Isayama, Naoya Aizawa, Jun Yun Kim, Takuma Yasuda

    Research output: Contribution to journalArticlepeer-review

    53 Citations (Scopus)


    Functional organic materials that display reversible changes in fluorescence in response to external stimuli are of immense interest owing to their potential applications in sensors, probes, and security links. While earlier studies mainly focused on changes in photoluminescence (PL) color in response to external stimuli, stimuli-responsive electroluminescence (EL) has not yet been explored for color-tunable emitters in organic light-emitting diodes (OLEDs). Here a stimuli-responsive fluorophoric molecular system is reported that is capable of switching its emission color between green and orange in the solid state upon grinding, heating, and exposure to chemical vapor. A mechanistic study combining X-ray diffraction analysis and quantum chemical calculations reveals that the tunable green/orange emissions originate from the fluorophore's alternating excited-state conformers formed in the crystalline and amorphous phases. By taking advantage of this stimuli-responsive fluorescence behavior, two-color emissive OLEDs were produced using the same fluorophore in different solid phases.

    Original languageEnglish
    Pages (from-to)11982-11986
    Number of pages5
    JournalAngewandte Chemie - International Edition
    Issue number37
    Publication statusPublished - Sept 10 2018

    All Science Journal Classification (ASJC) codes

    • Catalysis
    • Chemistry(all)


    Dive into the research topics of 'Modulating Photo- and Electroluminescence in a Stimuli-Responsive π-Conjugated Donor–Acceptor Molecular System'. Together they form a unique fingerprint.

    Cite this