TY - JOUR
T1 - Mechanochromic Delayed Fluorescence Switching in Propeller-Shaped Carbazole–Isophthalonitrile Luminogens with Stimuli-Responsive Intramolecular Charge-Transfer Excited States
AU - Yang, Minlang
AU - Park, In Seob
AU - Miyashita, Yasuhiro
AU - Tanaka, Katsunori
AU - Yasuda, Takuma
N1 - Funding Information:
This research was supported in part by Grant‐in‐Aid for JSPS KAKENHI Grant No. JP18H02048 (T.Y.) and JP19K15651 (I.S.P.), the Research Foundation for the Electrotechnology of Chubu (T.Y.), Hoso Bunka Foundation (T.Y.), and Hirose International Scholarship Foundation (I.S.P.). We are grateful for the support provided by the Cooperative Research Program “Network Joint Research Center for Materials and Devices” and the computer facilities at the Research Institute for Information Technology, Kyushu University.
Funding Information:
This research was supported in part by Grant-in-Aid for JSPS KAKENHI Grant No. JP18H02048 (T.Y.) and JP19K15651 (I.S.P.), the Research Foundation for the Electrotechnology of Chubu (T.Y.), Hoso Bunka Foundation (T.Y.), and Hirose International Scholarship Foundation (I.S.P.). We are grateful for the support provided by the Cooperative Research Program ?Network Joint Research Center for Materials and Devices? and the computer facilities at the Research Institute for Information Technology, Kyushu University.
Publisher Copyright:
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/8/10
Y1 - 2020/8/10
N2 - Herein, the universal design of high-efficiency stimuli-responsive luminous materials endowed with mechanochromic luminescence (MCL) and thermally activated delayed fluorescence (TADF) functions is reported. The origin of the unique stimuli-triggered TADF switching for a series of carbazole–isophthalonitrile-based donor–acceptor (D–A) luminogens is demonstrated based on systematic photophysical and X-ray analysis, coupled with theoretical calculations. It was revealed that a tiny alteration of the intramolecular D–A twisting in the excited-state structures governed by the solid morphologies is responsible for this dynamic TADF switching behavior. This concept is applicable to the fabrication of bicolor emissive organic light-emitting diodes using a single TADF emitter.
AB - Herein, the universal design of high-efficiency stimuli-responsive luminous materials endowed with mechanochromic luminescence (MCL) and thermally activated delayed fluorescence (TADF) functions is reported. The origin of the unique stimuli-triggered TADF switching for a series of carbazole–isophthalonitrile-based donor–acceptor (D–A) luminogens is demonstrated based on systematic photophysical and X-ray analysis, coupled with theoretical calculations. It was revealed that a tiny alteration of the intramolecular D–A twisting in the excited-state structures governed by the solid morphologies is responsible for this dynamic TADF switching behavior. This concept is applicable to the fabrication of bicolor emissive organic light-emitting diodes using a single TADF emitter.
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U2 - 10.1002/anie.202005584
DO - 10.1002/anie.202005584
M3 - Article
C2 - 32369229
AN - SCOPUS:85085986903
VL - 59
SP - 13955
EP - 13961
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 33
ER -