TY - JOUR
T1 - Single-Crystalline Optical Microcavities from Luminescent Dendrimers
AU - Iwai, Kohei
AU - Yamagishi, Hiroshi
AU - Herzberger, Colin
AU - Sato, Yuji
AU - Tsuji, Hayato
AU - Albrecht, Ken
AU - Yamamoto, Kimihisa
AU - Sasaki, Fumio
AU - Sato, Hiroyasu
AU - Asaithambi, Aswin
AU - Lorke, Axel
AU - Yamamoto, Yohei
N1 - Funding Information:
The authors acknowledge Prof. Tatsuya Nabeshima and Prof. Takashi Nakamura in University of Tsukuba for PL quantum yield experiments and Eri Hisamura in Kyushu University for MALDI-TOF MS experiments. This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas “π-System Figuration” (JP17H05142, JP17H05163, JP17H05146), “Aquatic Functional Materials” (JP19H05716), Scientific Research (A) (JP16H02081), Scientific Research (B) (JP16H04106, JP20H02801), Scientific Research (S) (JP15H05757), and Young Scientist (JP19K15334) from Japan Society for the Promotion of Science (JSPS), ERATO Yamamoto Atom-Hybrid Project (JPMJER1503) from Japan Science and Technology Agency (JST), Cooperative Research Program of “Network Joint Research Center for Materials and Devices”, The Ogasawara Foundation for the Promotion of Science & Technology, The Kao Foundation for Arts and Sciences, University of Tsukuba Pre-strategic initiative “Ensemble of light with matters and life”, and TIA Kakehashi.
Funding Information:
The authors acknowledge Prof. Tatsuya Nabeshima and Prof. Takashi Nakamura in University of Tsukuba for PL quantum yield experiments and Eri Hisamura in Kyushu University for MALDI‐TOF MS experiments. This work was supported by a Grant‐in‐Aid for Scientific Research on Innovative Areas “π‐System Figuration” (JP17H05142, JP17H05163, JP17H05146), “Aquatic Functional Materials” (JP19H05716), Scientific Research (A) (JP16H02081), Scientific Research (B) (JP16H04106, JP20H02801), Scientific Research (S) (JP15H05757), and Young Scientist (JP19K15334) from Japan Society for the Promotion of Science (JSPS), ERATO Yamamoto Atom‐Hybrid Project (JPMJER1503) from Japan Science and Technology Agency (JST), Cooperative Research Program of “Network Joint Research Center for Materials and Devices”, The Ogasawara Foundation for the Promotion of Science & Technology, The Kao Foundation for Arts and Sciences, University of Tsukuba Pre‐strategic initiative “Ensemble of light with matters and life”, and TIA Kakehashi.
Publisher Copyright:
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/7/27
Y1 - 2020/7/27
N2 - Microcrystallites are promising minute mirrorless laser sources. A variety of luminescent organic compounds have been exploited along this line, but dendrimers have been inapplicable owing to their fragility and extremely poor crystallinity. Now, a dendrimer family that overcomes these difficulties is presented. First-, second-, and third-generation carbazole (Cz) dendrimers with a carbon-bridged oligo(phenylenevinylene) (COPV2) core (GnCOPV2, n=1–3) assemble to form microcrystals. The COPV2 cores align uni/bidirectionally in the crystals while the Cz units in G2- and G3COPV2 align omnidirectionally. The dendrons work as light-harvesting antennas that absorb non-polarized light and transfer it to the COPV2 core, from which a polarized luminescence radiates. Furthermore, these crystals act as laser resonators, where the lasing thresholds are strongly coupled with the crystal morphology and the orientation of COPV2, which is in contrast with the conventional amorphous dendrimers.
AB - Microcrystallites are promising minute mirrorless laser sources. A variety of luminescent organic compounds have been exploited along this line, but dendrimers have been inapplicable owing to their fragility and extremely poor crystallinity. Now, a dendrimer family that overcomes these difficulties is presented. First-, second-, and third-generation carbazole (Cz) dendrimers with a carbon-bridged oligo(phenylenevinylene) (COPV2) core (GnCOPV2, n=1–3) assemble to form microcrystals. The COPV2 cores align uni/bidirectionally in the crystals while the Cz units in G2- and G3COPV2 align omnidirectionally. The dendrons work as light-harvesting antennas that absorb non-polarized light and transfer it to the COPV2 core, from which a polarized luminescence radiates. Furthermore, these crystals act as laser resonators, where the lasing thresholds are strongly coupled with the crystal morphology and the orientation of COPV2, which is in contrast with the conventional amorphous dendrimers.
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U2 - 10.1002/anie.202000712
DO - 10.1002/anie.202000712
M3 - Article
C2 - 32338404
AN - SCOPUS:85085337513
SN - 1433-7851
VL - 59
SP - 12674
EP - 12679
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 31
ER -