TY - JOUR
T1 - Stimuli-Responsive Dual-Color Photon Upconversion
T2 - A Singlet-to-Triplet Absorption Sensitizer in a Soft Luminescent Cyclophane
AU - Mase, Kazuma
AU - Sasaki, Yoichi
AU - Sagara, Yoshimitsu
AU - Tamaoki, Nobuyuki
AU - Weder, Christoph
AU - Yanai, Nobuhiro
AU - Kimizuka, Nobuo
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Numbers JP16H00844 and JP16H00818 (Soft Molecular Systems), JP25220805, JP17H04799, PRESTO program on “Molecular Technology and Creation of New Functions” from JST (JPMJPR14KE), the Asahi Glass Foundation, and the Iketani Science and Technology Foundation. This work benefitted from support from the Swiss National Science Foundation through the National Center of Competence in Research Bio-Inspired Materials.
Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/3/5
Y1 - 2018/3/5
N2 - Reversible emission color switching of triplet–triplet annihilation-based photon upconversion (TTA-UC) is achieved by employing an Os complex sensitizer with singlet-to-triplet (S-T) absorption and an asymmetric luminescent cyclophane with switchable emission characteristics. The cyclophane contains the 9,10-bis(phenylethynyl)anthracene unit as an emitter and can assemble into two different structures, a stable crystalline phase and a metastable supercooled nematic phase. The two structures exhibit green and yellow fluorescence, respectively, and can be accessed by distinct heating/cooling sequences. The hybridization of the cyclophane with the Os complex allows near-infrared-to-visible TTA-UC. The large anti-Stokes shift is possible by the direct S-T excitation, which dispenses with the use of a conventional sequence of singlet–singlet absorption and intersystem crossing. The TTA-UC emission color is successfully switched between green and yellow by thermal stimulation.
AB - Reversible emission color switching of triplet–triplet annihilation-based photon upconversion (TTA-UC) is achieved by employing an Os complex sensitizer with singlet-to-triplet (S-T) absorption and an asymmetric luminescent cyclophane with switchable emission characteristics. The cyclophane contains the 9,10-bis(phenylethynyl)anthracene unit as an emitter and can assemble into two different structures, a stable crystalline phase and a metastable supercooled nematic phase. The two structures exhibit green and yellow fluorescence, respectively, and can be accessed by distinct heating/cooling sequences. The hybridization of the cyclophane with the Os complex allows near-infrared-to-visible TTA-UC. The large anti-Stokes shift is possible by the direct S-T excitation, which dispenses with the use of a conventional sequence of singlet–singlet absorption and intersystem crossing. The TTA-UC emission color is successfully switched between green and yellow by thermal stimulation.
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U2 - 10.1002/anie.201712644
DO - 10.1002/anie.201712644
M3 - Article
C2 - 29363244
AN - SCOPUS:85041891443
SN - 1433-7851
VL - 57
SP - 2806
EP - 2810
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 11
ER -