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Lee YT, Chan CY, Matsuno N, Uemura S, Oda S, Kondo M, Weerasinghe RW, Hu Y, Lestanto GNI, Tsuchiya Y, Li Y, Hatakeyama T, Adachi C. Bright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design. Nat Commun 2024; 15:3174. [PMID: 38609364 PMCID: PMC11014922 DOI: 10.1038/s41467-024-47482-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 04/02/2024] [Indexed: 04/14/2024] Open
Abstract
To fulfill ultra-high-definition display, efficient and bright green organic light-emitting diodes with Commission Internationale de l'Éclairage y-coordinate ≥ 0.7 are required. Although there are some preceding reports of highly efficient devices based on pure-green multi-resonance emitters, the efficiency rolloff and device stabilities for those pure-green devices are still unsatisfactory. Herein, we report the rational design of two pure-green multi-resonance emitters for achieving highly stable and efficient pure-green devices with CIEx,ys that are close to the NTSC and BT. 2020 standards. In this study, our thermally activated delayed fluorescence OLEDs based on two pure-green multi-resonance emitters result in CIEy up to 0.74. In hyperfluorescent device architecture, the CIExs further meet the x-coordinate requirements, i.e., NTSC (0.21) and BT. 2020 (0.17), while keeping their CIEys ~ 0.7. Most importantly, hyperfluorescent devices display the high maximum external quantum efficiencies of over 25% and maximum luminance of over 105 cd m-2 with suppressed rolloffs (external quantum efficiency of ~20% at 104 cd m-2) and long device stabilities with LT95s of ~ 600 h.
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Affiliation(s)
- Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan
- Department of Chemistry, Soochow University, Taipei, ROC, Taiwan
| | - Chin-Yiu Chan
- Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Nanami Matsuno
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Shigetada Uemura
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Susumu Oda
- Department of Applied Chemistry, Graduate School of Science and Engineering, Toyo University, Kawagoe, Saitama, Japan
| | | | - Rangani Wathsala Weerasinghe
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan
| | - Yanmei Hu
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan
| | - Gerardus N Iswara Lestanto
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan
| | - Yufang Li
- Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan.
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka, Japan.
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Nishi, Fukuoka, Japan.
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2
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Ochi J, Yamasaki Y, Tanaka K, Kondo Y, Isayama K, Oda S, Kondo M, Hatakeyama T. Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter. Nat Commun 2024; 15:2361. [PMID: 38565868 PMCID: PMC10987657 DOI: 10.1038/s41467-024-46619-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 03/01/2024] [Indexed: 04/04/2024] Open
Abstract
An ultrapure deep-blue multi-resonance-induced thermally activated delayed fluorescence material (DOB2-DABNA-A) is designed and synthesized. Benefiting from a fully resonating extended helical π-conjugated system, this compound has a small ΔEST value of 3.6 meV and sufficient spin-orbit coupling to exhibit a high-rate constant for reverse intersystem crossing (kRISC = 1.1 × 106 s-1). Furthermore, an organic light-emitting diode employing DOB2-DABNA-A as an emitter is fabricated; it exhibits ultrapure deep-blue emission at 452 nm with a small full width at half maximum of 24 nm, corresponding to Commission Internationale de l'Éclairage (CIE) coordinates of (0.145, 0.049). The high kRISC value reduces the efficiency roll-off, resulting in a high external quantum efficiency (EQE) of 21.6% at 1000 cd m-2.
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Affiliation(s)
- Junki Ochi
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Yuki Yamasaki
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Kojiro Tanaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Yasuhiro Kondo
- SK JNC Japan Co., Ltd., 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Kohei Isayama
- SK JNC Japan Co., Ltd., 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Susumu Oda
- Department of Applied Chemistry, Graduate School of Science and Engineering, Toyo University, 2100 Kujirai, Kawagoe, Saitama, 350-8585, Japan
| | - Masakazu Kondo
- JNC Co., Ltd., 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
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3
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Mamada M, Hayakawa M, Ochi J, Hatakeyama T. Organoboron-based multiple-resonance emitters: synthesis, structure-property correlations, and prospects. Chem Soc Rev 2024; 53:1624-1692. [PMID: 38168795 DOI: 10.1039/d3cs00837a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Boron-based multiple-resonance (MR) emitters exhibit the advantages of narrowband emission, high absolute photoluminescence quantum yield, thermally activated delayed fluorescence (TADF), and sufficient stability during the operation of organic light-emitting diodes (OLEDs). Thus, such MR emitters have been widely applied as blue emitters in triplet-triplet-annihilation-driven fluorescent devices used in smartphones and televisions. Moreover, they hold great promise as TADF or terminal emitters in TADF-assisted fluorescence or phosphor-sensitised fluorescent OLEDs. Herein we comprehensively review organoboron-based MR emitters based on their synthetic strategies, clarify structure-photophysical property correlations, and provide design guidelines and future development prospects.
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Affiliation(s)
- Masashi Mamada
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Masahiro Hayakawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Junki Ochi
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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4
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Tang X, Xie M, Lin Z, Mitrofanov K, Tsagaantsooj T, Lee YT, Kabe R, Sandanayaka ASD, Matsushima T, Hatakeyama T, Adachi C. A Rigid Multiple Resonance Thermally Activated Delayed Fluorescence Core Toward Stable Electroluminescence and Lasing. Angew Chem Int Ed Engl 2024; 63:e202315210. [PMID: 37991245 DOI: 10.1002/anie.202315210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/08/2023] [Accepted: 11/20/2023] [Indexed: 11/23/2023]
Abstract
The investigation of organic light-emitting diodes (OLEDs) and organic laser devices with thermally activated delayed fluorescence (TADF) molecules is emerging due to the potential of harnessing triplets. In this work, a boron/nitrogen multiple-resonance TADF polycyclic framework fusing carbazole units (CzBNPh) was proposed. CzBNPh exhibited a narrowband emission (<30 nm), a unity photoluminescence quantum yield, and a fast radiative rate. Consequently, CzBNPh demonstrated a low distributed feedback (DFB) lasing threshold of 0.68 μJ cm-2 . Furthermore, the stimulated emission zone of CzBNPh was effectively separated from its singlet and triplet absorption, thereby minimizing the singlet-triplet annihilation under long-pulsed excitation ranging from 20 μs to 2.5 ms. Significantly, the enhanced rigid molecular conformation, thermal stability, and photo-stability resulted in improved lasing and electroluminescence stability compared to that of 5,9-diphenyl-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracene (DABNA)-core. These findings indicate the potential of CzBN-core as a promising framework for achieving long-pulsed wave and electrically-pumped lasing in the future.
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Affiliation(s)
- Xun Tang
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Mingchen Xie
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Zesen Lin
- Organic Optoelectronics Unit, Okinawa Institute of Science and Technology, Graduate University, 1919-1 Tancha, Kunigami-gun, Okinawa, Onna-son, 904-0495, Japan
| | - Kirill Mitrofanov
- Organic Optoelectronics Unit, Okinawa Institute of Science and Technology, Graduate University, 1919-1 Tancha, Kunigami-gun, Okinawa, Onna-son, 904-0495, Japan
| | - Tuul Tsagaantsooj
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Department of Chemistry, Soochow University, 70 Linhsi Rd., Shihlin, Taipei, Taiwan
| | - Ryota Kabe
- Organic Optoelectronics Unit, Okinawa Institute of Science and Technology, Graduate University, 1919-1 Tancha, Kunigami-gun, Okinawa, Onna-son, 904-0495, Japan
| | - Atula S D Sandanayaka
- Department of Physical Sciences and Technologies, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, 70140, Sri Lanka
| | - Toshinori Matsushima
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
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5
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Sano Y, Shintani T, Hayakawa M, Oda S, Kondo M, Matsushita T, Hatakeyama T. One-Shot Construction of BN-Embedded Heptadecacene Framework Exhibiting Ultra-narrowband Green Thermally Activated Delayed Fluorescence. J Am Chem Soc 2023; 145:11504-11511. [PMID: 37192399 DOI: 10.1021/jacs.3c02873] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
BN-embedded nonacene, tridecacene, and heptadecacene frameworks were constructed using one-shot quadruple, sextuple, and octuple borylation reactions, respectively. The key to success is the judicious choice of borylating reagents and long-chain alkyl-substituted carbazolyl groups as boron-trapping groups, which suppressed the decrease in HOMO energy and insolubilization associated with borylation. Based on the product yields, each electrophilic C-H borylation proceeded in >99% yield, which is the best efficiency reported so far for C-H borylation reactions. Owing to the multiple resonance effects of boron and nitrogen, the prepared acenes exhibited ultra-narrowband green thermally activated delayed fluorescence with full-width at half-maximum of 12-16 nm; moreover, their kRISC values were in the order of 105 s-1. We fabricated an organic light-emitting diode by employing the nonacene as an emitter, which exhibited high external quantum efficiency (EQE) of 28.7%. The device also showed a minimum efficiency roll-off with an EQE of 25.8% at 1000 cd m-2.
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Affiliation(s)
- Yusuke Sano
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Toshiki Shintani
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Masahiro Hayakawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Susumu Oda
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Masakazu Kondo
- JNC Corporation, 5-1, Goikaigan, Ichihara, Chiba 290-8551, Japan
| | | | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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6
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Hayakawa M, Kameda M, Kawasumi R, Nakatsuka S, Yasuda N, Hatakeyama T. Spiroborate-Based Host Materials with High Triplet Energies and Ambipolar Charge-Transport Properties. Angew Chem Int Ed Engl 2023; 62:e202217512. [PMID: 36718823 DOI: 10.1002/anie.202217512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/29/2022] [Accepted: 01/30/2023] [Indexed: 02/01/2023]
Abstract
Organic light-emitting diodes (OLEDs) receive considerable attention because of their commercial use in flat panel displays. Herein, highly efficient spiroborate-based host materials are reported for use in blue OLEDs. Our designed spiroborates (SBOX) were simple to synthesize and exhibited high triplet excitation energies, narrow S-T gaps, and balanced charge carrier mobilities. A blue OLED containing one of the designed spiroborates, SBON, as a host exhibited a high external quantum efficiency (27.6 %) and low turn-on voltage (3.7 V) compared to those observed using 3,3'-di(9H-carbazol-9-yl)-1,1'-biphenyl (17.6 % and 4.5 V, respectively), indicating their potential as host materials in OLEDs.
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Affiliation(s)
- Masahiro Hayakawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Mayu Kameda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, Hyogo, 669-1330, Japan
| | - Ryosuke Kawasumi
- SK JNC Japan Co., Ltd., 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan.,Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, Hyogo, 669-1330, Japan
| | - Nobuhiro Yasuda
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan.,Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, Hyogo, 669-1330, Japan
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7
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Oono T, Okada T, Sasaki T, Inagaki K, Ushiku T, Shimizu T, Hatakeyama T, Fukagawa H. Unlocking the Full Potential of Electron-Acceptor Molecules for Efficient and Stable Hole Injection. Adv Mater 2023; 35:e2210413. [PMID: 36571784 DOI: 10.1002/adma.202210413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/19/2022] [Indexed: 06/17/2023]
Abstract
Understanding the hole-injection mechanism and improving the hole-injection property are of pivotal importance in the future development of organic optoelectronic devices. Electron-acceptor molecules with high electron affinity (EA) are widely used in electronic applications, such as hole injection and p-doping. Although p-doping has generally been studied in terms of matching the ionization energy (IE) of organic semiconductors with the EA of acceptor molecules, little is known about the effect of the EA of acceptor molecules on the hole-injection property. In this work, the hole-injection mechanism in devices is completely clarified, and a strategy to optimize the hole-injection property of the acceptor molecule is developed. Efficient and stable hole injection is found to be possible even into materials with IEs as high as 5.8 eV by controlling the charged state of an acceptor molecule with an EA of about 5.0 eV. This excellent hole-injection property enables direct hole injection into an emitting layer, realizing a pure blue organic light-emitting diode with an extraordinarily low turn-on voltage of 2.67 V, a power efficiency of 29 lm W-1 , an external quantum efficiency of 28% and a Commission Internationale de l'Eclairage y coordinate of less than 0.10.
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Affiliation(s)
- Taku Oono
- Japan Broadcasting Corporation (NHK), Science and Technology Research Laboratories, 1-10-11, Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
| | - Takuya Okada
- Japan Broadcasting Corporation (NHK), Science and Technology Research Laboratories, 1-10-11, Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
| | - Tsubasa Sasaki
- Japan Broadcasting Corporation (NHK), Science and Technology Research Laboratories, 1-10-11, Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
| | - Kaito Inagaki
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8610, Japan
| | - Takuma Ushiku
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8610, Japan
| | - Takahisa Shimizu
- Japan Broadcasting Corporation (NHK), Science and Technology Research Laboratories, 1-10-11, Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Hirohiko Fukagawa
- Japan Broadcasting Corporation (NHK), Science and Technology Research Laboratories, 1-10-11, Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
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8
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Hayakawa M, Kameda M, Kawasumi R, Nakatsuka S, Yasuda N, Hatakeyama T. Spiroborate‐Based Host Materials with High Triplet Energies and Ambipolar Charge‐Transport Properties. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202217512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Masahiro Hayakawa
- Kyoto University Department of Chemistry, Graduate School of Science Kitashirakawa OiwakechoSakyo-ku 6068502 Kyoto JAPAN
| | - Mayu Kameda
- Kwansei Gakuin University: Kansei Gakuin Daigaku Department of Chemistry, Graduate School of Science and Technology 1Gakuen Uegahara 669-1330 Sanda JAPAN
| | - Ryosuke Kawasumi
- SK JNC Japan Co., Ltd. SK JNC Japan Co., Ltd. 25-1 Goi Kaigan 290–8551 Ichihara JAPAN
| | - Soichiro Nakatsuka
- Kyoto University: Kyoto Daigaku Department of Chemistry, Graduate School of Science Kitashirakawa OiwakechoSakyo-ku 606-8502 Kyoto JAPAN
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI) Center for Synchrotron Radiation Research 1-1-1KoutoSayo-choSayo-gun 679-5198 JAPAN
| | - Takuji Hatakeyama
- Kyoto University: Kyoto Daigaku Graduate School of Science Sakyo-ku 606-8502 Kyoto JAPAN
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9
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Uemura S, Oda S, Hayakawa M, Kawasumi R, Ikeda N, Lee YT, Chan CY, Tsuchiya Y, Adachi C, Hatakeyama T. Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material. J Am Chem Soc 2023; 145:1505-1511. [PMID: 36547020 DOI: 10.1021/jacs.2c10946] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters have emerged as an important component of organic light-emitting diodes (OLEDs) because of their narrowband emission and high exciton utilization efficiency. However, the chemical space of MR-TADF emitters remains mostly unexplored because of the lack of suitable synthetic protocols. Herein, we demonstrate a sequential multiple borylation reaction that provides new synthetically accessible chemical space. ω-DABNA, the proof-of-concept material, exhibited narrowband green TADF with a full width at half-maximum of 22 nm and a small singlet-triplet energy gap of 13 meV. The OLED employing it as an emitter exhibited electroluminescence at 512 nm, with Commission International de l'Éclairage coordinates of (0.13, 0.73) and a high external quantum efficiency (EQE) of 31.1%. Moreover, the device showed minimum efficiency roll-off, with an EQE of 29.4% at 1000 cd m-2.
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Affiliation(s)
- Shigetada Uemura
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto606-8502, Japan.,Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo669-1337, Japan
| | - Susumu Oda
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo669-1337, Japan
| | - Masahiro Hayakawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto606-8502, Japan
| | - Ryosuke Kawasumi
- SK JNC Japan Co., Ltd. 5-1 Goikaigan, Ichihara, Chiba290-8551, Japan
| | - Naoya Ikeda
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo669-1337, Japan
| | - Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka819-0395, Japan
| | - Chin-Yiu Chan
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka819-0395, Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka819-0395, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka819-0395, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto606-8502, Japan
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10
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Okada N, Nakatsuka S, Kawasumi R, Gotoh H, Yasuda N, Hatakeyama T. Synthesis and Late-Stage Diversification of BN-Embedded Dibenzocorannulenes as Efficient Fluorescence Organic Light-Emitting Diode Emitters. Chemistry 2023; 29:e202202627. [PMID: 36260535 DOI: 10.1002/chem.202202627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Indexed: 11/07/2022]
Abstract
We report the synthesis and late-stage diversification of a new class of hetero-buckybowl, BN-embedded dibenzocorannulenes (B2 N2 -DBCs). The synthesis is achieved via one-shot halogenative borylation, comprising the nitrogen-directed haloboration of alkyne and an intramolecular bora-Friedel-Crafts reaction, which provides BN-embedded dibenzocorannulene possessing two bromo substituents (B2 N2 -DBC-Br). B2 N2 -DBC-Br undergoes diversification via coupling reactions to provide a variety of arylated derivatives (B2 N2 -DBC-R), exhibiting strong blue fluorescence. An organic light-emitting diode (OLED) employing one of the derivatives as an emitter exhibited a high external quantum efficiency of 6.6 % and long operational lifetime of 907 h at an initial luminance of 1000 cd m-2 , indicating the significant potential for the development of efficient and stable hetero-buckybowl-based OLED materials.
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Affiliation(s)
- Naoya Okada
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, School of Science, Kyoto University Sakyo-ku, Kyoto, 606-8502, Japan
| | - Ryosuke Kawasumi
- SK JNC Japan, Co. Ltd., 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science, Kyoto University Sakyo-ku, Kyoto, 606-8502, Japan
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11
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Oda S, Kawakami B, Horiuchi M, Yamasaki Y, Kawasumi R, Hatakeyama T. Ultra-Narrowband Blue Multi-Resonance Thermally Activated Delayed Fluorescence Materials. Adv Sci (Weinh) 2022; 10:e2205070. [PMID: 36394083 PMCID: PMC9811429 DOI: 10.1002/advs.202205070] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Ultra-narrowband blue multi-resonance-induced thermally activated delayed fluorescence (MR-TADF) materials (V-DABNA and V-DABNA-F), consisting of three DABNA subunits possessing phenyl or 2,6-difluorophenyl substituents on the peripheral nitrogen atoms are synthesized by one-shot triple borylation. Benefiting from the inductive effect of fluorine atoms, the emission maximum of V-DABNA-F (464 nm) is blueshifted from that of the parent V-DABNA (481 nm), while maintaining a small full width at half maximum (FWHM, 16 nm) and a high rate constant for reverse intersystem crossing (6.5 × 105 s-1 ). The organic light-emitting diodes (OLEDs) using V-DABNA and V-DABNA-F as emitters are fabricated by vapor deposition and exhibit blue emission at 483 and 468 nm with small FWHMs of 17 and 15 nm, corresponding to Commission Internationale d'Éclairage coordinates of (0.09, 0.27) and (0.12, 0.10), respectively. Both devices achieve high external quantum efficiencies of 26.2% and 26.6% at the maximum with minimum efficiency roll-offs of 0.9% and 3.2%, respectively, even at 1000 cd m-2 , which are record-setting values for blue MR-TADF OLEDs.
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Affiliation(s)
- Susumu Oda
- Department of ChemistryGraduate School of Science and TechnologyKwansei Gakuin University2‐1 Gakuen, SandaHyogo669‐1337Japan
| | - Bungo Kawakami
- Department of ChemistryGraduate School of Science and TechnologyKwansei Gakuin University2‐1 Gakuen, SandaHyogo669‐1337Japan
| | - Masaru Horiuchi
- Department of ChemistryGraduate School of Science and TechnologyKwansei Gakuin University2‐1 Gakuen, SandaHyogo669‐1337Japan
- Department of ChemistryGraduate School of ScienceKyoto UniversitySakyo‐kuKyoto606‐8502Japan
| | - Yuki Yamasaki
- Department of ChemistryGraduate School of Science and TechnologyKwansei Gakuin University2‐1 Gakuen, SandaHyogo669‐1337Japan
| | | | - Takuji Hatakeyama
- Department of ChemistryGraduate School of ScienceKyoto UniversitySakyo‐kuKyoto606‐8502Japan
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12
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Oda S, Kawakami B, Yamasaki Y, Matsumoto R, Yoshioka M, Fukushima D, Nakatsuka S, Hatakeyama T. Correction to “One-Shot Synthesis of Expanded Heterohelicene Exhibiting Narrowband Thermally Activated Delayed Fluorescence”. J Am Chem Soc 2022; 144:21426-21427. [DOI: 10.1021/jacs.2c11135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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13
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Oda S, Sugitani T, Tanaka H, Tabata K, Kawasumi R, Hatakeyama T. Development of Pure Green Thermally Activated Delayed Fluorescence Material by Cyano Substitution. Adv Mater 2022; 34:e2201778. [PMID: 35726390 DOI: 10.1002/adma.202201778] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/28/2022] [Indexed: 06/15/2023]
Abstract
Multiple resonance (MR)-effect-induced thermally activated delayed fluorescence (TADF) materials have garnered significant attention because they can achieve both high color purity and high external quantum efficiency (EQE). However, the reported green-emitting MR-TADF materials exhibit broader emission compared to those of blue-emitting ones and suffer from severe efficiency roll-off due to insufficient rate constants of reverse intersystem crossing process (kRISC ). Herein, a pure green MR-TADF material (ν-DABNA-CN-Me) with high kRISC of 105 s-1 is reported. The key to success is introduction of cyano groups into a blue-emitting MR-TADF material (ν-DABNA), which causes remarkable bathochromic shift without a loss of color purity. The organic light-emitting diode employing it as an emitter exhibits green emission at 504 nm with a small full-width at half-maximum of 23 nm, corresponding to Commission Internationale d'Éclairage coordinates of (0.13, 0.65). The device achieves a high maximum EQE of 31.9% and successfully suppresses the efficiency roll-off at a high luminance.
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Affiliation(s)
- Susumu Oda
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Takumi Sugitani
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Hiroyuki Tanaka
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Keita Tabata
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Ryosuke Kawasumi
- SK JNC Japan Co., Ltd., 25-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
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14
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Yagi A, Okada N, Fukui N, Tanaka H, Hatakeyama T, Shinokubo H. Nitrogen Extrusion of Diazacorrphycenes to Azacorroles and Synthesis of Two Types of Copper 10-Azacorrole Complexes. CHEM LETT 2022. [DOI: 10.1246/cl.210777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Atsumi Yagi
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Naoya Okada
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Norihito Fukui
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Hisaaki Tanaka
- Department of Applied Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Hiroshi Shinokubo
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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15
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Oda S, Kawakami B, Yamasaki Y, Matsumoto R, Yoshioka M, Fukushima D, Nakatsuka S, Hatakeyama T. One-Shot Synthesis of Expanded Heterohelicene Exhibiting Narrowband Thermally Activated Delayed Fluorescence. J Am Chem Soc 2021; 144:106-112. [PMID: 34941256 DOI: 10.1021/jacs.1c11659] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An expanded heterohelicene consisting of three BN2-embedded [4]helicene subunits (V-DABNA-Mes) has been synthesized by one-shot triple borylation. The key to success is the excessive use of boron tribromide in an autoclave. Based on the multiple resonance effect of three boron and six nitrogen atoms, V-DABNA-Mes exhibited a narrowband sky-blue thermally activated delayed fluorescence with a full width at half-maximum of 16 nm. The resonating π-extension minimized the singlet-triplet energy gap and enabled rapid reverse intersystem crossing with a rate constant of 4.4 × 105 s-1. The solution-processed organic light-emitting diode device, employed as an emitter, exhibited a narrowband emission at 480 nm with a high external quantum efficiency of 22.9%.
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Affiliation(s)
- Susumu Oda
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Bungo Kawakami
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Yuki Yamasaki
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Ryuji Matsumoto
- Advanced Material Development Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki 300-3294, Japan
| | - Mayu Yoshioka
- Advanced Material Development Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki 300-3294, Japan
| | - Daisuke Fukushima
- Advanced Material Development Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki 300-3294, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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16
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Tanaka H, Oda S, Ricci G, Gotoh H, Tabata K, Kawasumi R, Beljonne D, Olivier Y, Hatakeyama T. Hypsochromic Shift of Multiple-Resonance-Induced Thermally Activated Delayed Fluorescence by Oxygen Atom Incorporation. Angew Chem Int Ed Engl 2021; 60:17910-17914. [PMID: 34038618 DOI: 10.1002/anie.202105032] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/15/2021] [Indexed: 11/07/2022]
Abstract
Herein, we reported an ultrapure blue multiple-resonance-induced thermally activated delayed fluorescence (MR-TADF) material (ν-DABNA-O-Me) with a high photoluminescence quantum yield and a large rate constant for reverse intersystem crossing. Because of restricted π-conjugation of the HOMO rather than the LUMO induced by oxygen atom incorporation, ν-DABNA-O-Me shows a hypsochromic shift compared to the parent MR-TADF material (ν-DABNA). An organic light-emitting diode based on this material exhibits an emission at 465 nm, with a small full-width at half-maximum of 23 nm and Commission Internationale de l'Eclairage coordinates of (0.13, 0.10), and a high maximum external quantum efficiency of 29.5 %. Moreover, ν-DABNA-O-Me facilitates a drastically improved efficiency roll-off and a device lifetime compared to ν-DABNA, which demonstrates significant potential of the oxygen atom incorporation strategy.
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Affiliation(s)
- Hiroyuki Tanaka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Gaetano Ricci
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide, Namur Institute of Structured Matter, Université de Namur, Rue de Bruxelles, 61, 5000, Namur, Belgium
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Keita Tabata
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc 20, 7000, Mons, Belgium
| | - Yoann Olivier
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide, Namur Institute of Structured Matter, Université de Namur, Rue de Bruxelles, 61, 5000, Namur, Belgium
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
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17
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Tanaka H, Oda S, Ricci G, Gotoh H, Tabata K, Kawasumi R, Beljonne D, Olivier Y, Hatakeyama T. Hypsochromic Shift of Multiple‐Resonance‐Induced Thermally Activated Delayed Fluorescence by Oxygen Atom Incorporation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105032] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hiroyuki Tanaka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
- JNC Petrochemical Corporation 5-1 Goi Kaigan Ichihara Chiba 290-8551 Japan
| | - Susumu Oda
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Gaetano Ricci
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide Namur Institute of Structured Matter Université de Namur Rue de Bruxelles, 61 5000 Namur Belgium
| | - Hajime Gotoh
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Keita Tabata
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
- JNC Petrochemical Corporation 5-1 Goi Kaigan Ichihara Chiba 290-8551 Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation 5-1 Goi Kaigan Ichihara Chiba 290-8551 Japan
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials Université de Mons Place du Parc 20 7000 Mons Belgium
| | - Yoann Olivier
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide Namur Institute of Structured Matter Université de Namur Rue de Bruxelles, 61 5000 Namur Belgium
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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18
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Gotoh H, Nakatsuka S, Tanaka H, Yasuda N, Haketa Y, Maeda H, Hatakeyama T. Syntheses and Physical Properties of Cationic BN‐Embedded Polycyclic Aromatic Hydrocarbons. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103488] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Hajime Gotoh
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Soichiro Nakatsuka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hiroki Tanaka
- Department of Applied Chemistry College of Life Sciences Ritsumeikan University 1-1-1 Kusatsu Shiga 525-8577 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Yohei Haketa
- Department of Applied Chemistry College of Life Sciences Ritsumeikan University 1-1-1 Kusatsu Shiga 525-8577 Japan
| | - Hiromitsu Maeda
- Department of Applied Chemistry College of Life Sciences Ritsumeikan University 1-1-1 Kusatsu Shiga 525-8577 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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19
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Gotoh H, Nakatsuka S, Tanaka H, Yasuda N, Haketa Y, Maeda H, Hatakeyama T. Syntheses and Physical Properties of Cationic BN-Embedded Polycyclic Aromatic Hydrocarbons. Angew Chem Int Ed Engl 2021; 60:12835-12840. [PMID: 33749982 DOI: 10.1002/anie.202103488] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Indexed: 11/10/2022]
Abstract
Cationic BN-embedded polycyclic aromatic hydrocarbons (BN-PAH+ s) were synthesized from a nitrogen-containing macrocycle via pyridine-directed tandem C-H borylation. Incorporating BN into PAH+ resulted in a remarkable hypsochromic shift due to an increase in the LUMO energy and the symmetry changes of the HOMO and LUMO. Electrophilic substitution or anion exchange of BN-PAH+ possessing tetrabromoborate as a counter anion (BN+ [BBr4 - ]) afforded air-stable BN-PAH/PAH+ s. Of these, BN+ [TfO- ] allowed reversible two-electron reduction and the formation of two-dimensional brickwork-type π-electronic ion pair with 1,2,3,4,5-pentacyanocyclopentadienyl anion, demonstrating the potential application of BN-PAH+ as electronic materials.
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Affiliation(s)
- Hajime Gotoh
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Hiroki Tanaka
- Department of Applied Chemistry College of Life Sciences, Ritsumeikan University, 1-1-1 Kusatsu, Shiga, 525-8577, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Yohei Haketa
- Department of Applied Chemistry College of Life Sciences, Ritsumeikan University, 1-1-1 Kusatsu, Shiga, 525-8577, Japan
| | - Hiromitsu Maeda
- Department of Applied Chemistry College of Life Sciences, Ritsumeikan University, 1-1-1 Kusatsu, Shiga, 525-8577, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
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Affiliation(s)
- Laksmikanta Adak
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Masaharu Nakamura
- International Research Center for Elements Science, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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21
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Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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22
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Stavrou K, Danos A, Hama T, Hatakeyama T, Monkman A. Hot Vibrational States in a High-Performance Multiple Resonance Emitter and the Effect of Excimer Quenching on Organic Light-Emitting Diodes. ACS Appl Mater Interfaces 2021; 13:8643-8655. [PMID: 33555850 PMCID: PMC8023512 DOI: 10.1021/acsami.0c20619] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/28/2021] [Indexed: 05/23/2023]
Abstract
The photophysics of multiple resonance thermally activated delayed fluorescence molecule ν-DABNA is described. We show coupling of a 285 cm-1 stretching/scissoring vibrational mode of peripheral phenyl rings to the S1 state, which dictates the ultimate emission full-width at half maximum. However, a separate high amplitude mode, 945 cm-1 of the N-biphenyl units, mediates the reverse intersystem crossing (rISC) mechanism. Concentration-dependent studies in solution and solid state reveal a second emission band that increases nonlinearly with concentration, independent of the environment assigned to excimer emission. Even at concentrations well below those used in devices, the excimer contribution affects performance. Using different solvents and solid hosts, rISC rates between 3-6 × 105 s-1 are calculated, which show negligible dependence on environmental polarity or host packing. At 20 K over the first 10 ns, we observe a broad Gaussian excimer emission band with energy on-set above the S1 exciton band. An optical singlet-triplet gap (ΔEST) of 70 meV is measured, agreeing with previous thermal estimates; however, the triplet energy is also found to be temperature-dependent. A monotonic increase of the exciton emission band full-width at half maximum with temperature indicates the role of hot transitions in forming vibrational excited states at room temperature (RT), and combined with an observed temperature dependency of ΔEST, we deduce that the rISC mechanism is that of thermally activated reverse internal conversion of T1 to TN (n ≥ 2) followed by rapid rISC of TN to S1. Organic light-emitting diodes with ν-DABNA as a hyperfluorescent emitter (0.5 wt % and 1 wt %) exhibit an increase of maximum external quantum efficiency, reaching 27.5% for the lower ν-DABNA concentration. On the contrary, a Förster radius analysis indicated that the energy transfer ratio is smaller because of higher donor-acceptor separation (>2.4 nm) with weak sensitizer emission observed in the electroluminescence. This indicates excimer quenching in 1 wt % devices.
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Affiliation(s)
- Kleitos Stavrou
- Department
of Physics, Durham University, South Road, Durham, DH1 3LE, United
Kingdom
| | - Andrew Danos
- Department
of Physics, Durham University, South Road, Durham, DH1 3LE, United
Kingdom
| | - Toshiki Hama
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Andrew Monkman
- Department
of Physics, Durham University, South Road, Durham, DH1 3LE, United
Kingdom
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23
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Matsui K, Oda S, Yoshiura K, Nakajima K, Yasuda N, Hatakeyama T. Correction to "One-Shot Multiple Borylation toward BN-Doped Nanographenes". J Am Chem Soc 2021; 143:1680. [PMID: 33449692 DOI: 10.1021/jacs.0c13373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oda S, Kumano W, Hama T, Kawasumi R, Yoshiura K, Hatakeyama T. Carbazole‐Based DABNA Analogues as Highly Efficient Thermally Activated Delayed Fluorescence Materials for Narrowband Organic Light‐Emitting Diodes. Angew Chem Int Ed Engl 2020; 60:2882-2886. [DOI: 10.1002/anie.202012891] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Wataru Kumano
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Toshiki Hama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation 5-1 Goi Kaigan, Ichihara Chiba 290-8551 Japan
| | - Kazuki Yoshiura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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25
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Oda S, Kumano W, Hama T, Kawasumi R, Yoshiura K, Hatakeyama T. Carbazole‐Based DABNA Analogues as Highly Efficient Thermally Activated Delayed Fluorescence Materials for Narrowband Organic Light‐Emitting Diodes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012891] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Wataru Kumano
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Toshiki Hama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation 5-1 Goi Kaigan, Ichihara Chiba 290-8551 Japan
| | - Kazuki Yoshiura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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26
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Ikeda N, Oda S, Matsumoto R, Yoshioka M, Fukushima D, Yoshiura K, Yasuda N, Hatakeyama T. Solution-Processable Pure Green Thermally Activated Delayed Fluorescence Emitter Based on the Multiple Resonance Effect. Adv Mater 2020; 32:e2004072. [PMID: 32864797 DOI: 10.1002/adma.202004072] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/19/2020] [Indexed: 05/28/2023]
Abstract
Thermally activated delayed fluorescence (TADF) materials based on the multiple resonance (MR) effect are applied in organic light-emitting diodes (OLEDs), combining high color purity and efficiency. However, they are not fabricated via solution-processing, which is an economical approach toward the mass production of OLED displays. Here, a solution-processable MR-TADF material (OAB-ABP-1), with an extended π-skeleton and bulky substituents, is designed. OAB-ABP-1 is synthesized from commercially available starting materials via a four-step process involving one-shot double borylation. OAB-ABP-1 presents attractive photophysical properties, a narrow emission band, a high photoluminescence quantum yield, a small energy gap between S1 and T1 , and low activation energy for reverse intersystem crossing. These properties are attributed to the alternating localization of the highest occupied and lowest unoccupied molecular orbitals induced by the boron, nitrogen, and oxygen atoms. Furthermore, to facilitate charge recombination, two novel semiconducting polymers with similar ionization potentials to that of OAB-ABP-1 are synthesized for use as interlayer and emissive layer materials. A solution-processed OLED device is fabricated using OAB-ABP-1 and the aforementioned polymers; it exhibits pure green electroluminescence with a small full-width at half-maximum and a high external quantum efficiency with minimum efficiency roll-off.
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Affiliation(s)
- Naoya Ikeda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Ryuji Matsumoto
- Advanced Material Development Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-3294, Japan
| | - Mayu Yoshioka
- Advanced Material Development Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-3294, Japan
| | - Daisuke Fukushima
- Advanced Material Development Laboratory, Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki, 300-3294, Japan
| | - Kazuki Yoshiura
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
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27
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Nguyen TB, Nakanotani H, Hatakeyama T, Adachi C. The Role of Reverse Intersystem Crossing Using a TADF-Type Acceptor Molecule on the Device Stability of Exciplex-Based Organic Light-Emitting Diodes. Adv Mater 2020; 32:e1906614. [PMID: 31975459 DOI: 10.1002/adma.201906614] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/28/2019] [Indexed: 05/25/2023]
Abstract
Exciplex system exhibiting thermally activated delayed fluorescence (TADF) holds a considerable potential to improve organic light-emitting diode (OLED) performances. However, the operational lifetime of current exciplex-based devices, unfortunately, falls far behind the requirement for commercialization. Herein, rationally choosing a TADF-type electron acceptor molecule is reported as a new strategy to enhance OLEDs' operating lifetime. A comprehensive study of the exciplex system containing 9,9',9''-triphenyl-9H,9'H,9''H-3,3':6',3''-tercarbazole (Tris-PCz) and triazine (TRZ) derivatives clarifies the relationship between unwanted carrier recombination on acceptor molecules, TADF property of acceptors, and the device degradation event. By employing a proposed "exciton recycling" strategy, a threefold increased operational lifetime can be achieved while still maintaining high-performance OLED properties. In particular, a stable blue OLED that employs this strategy is successfully demonstrated. This research provides an important step for exciplex-based devices toward the significant improvement of operational stability.
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Affiliation(s)
- Thanh Ba Nguyen
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- JST, ERATO, Adachi Molecular Exciton Engineering Project, c/o Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
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28
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Nakatsuka S, Watanabe Y, Kamakura Y, Horike S, Tanaka D, Hatakeyama T. Rücktitelbild: Solvent‐Vapor‐Induced Reversible Single‐Crystal‐to‐Single‐Crystal Transformation of a Triphosphaazatriangulene‐Based Metal–Organic Framework (Angew. Chem. 4/2020). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yusuke Watanabe
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yoshinobu Kamakura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Satoshi Horike
- Institute for Integrated Cell-Material Sciences Institute for Advanced Study Kyoto University Yoshida-Honmachi, Sakyo-ku Kyoto 606-8501 Japan
| | - Daisuke Tanaka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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29
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Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kenta Ueura
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Bungo Kawakami
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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30
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Nakatsuka S, Watanabe Y, Kamakura Y, Horike S, Tanaka D, Hatakeyama T. Solvent‐Vapor‐Induced Reversible Single‐Crystal‐to‐Single‐Crystal Transformation of a Triphosphaazatriangulene‐Based Metal–Organic Framework. Angew Chem Int Ed Engl 2019; 59:1435-1439. [DOI: 10.1002/anie.201912195] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Indexed: 01/20/2023]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yusuke Watanabe
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yoshinobu Kamakura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Satoshi Horike
- Institute for Integrated Cell-Material Sciences Institute for Advanced Study Kyoto University Yoshida-Honmachi, Sakyo-ku Kyoto 606-8501 Japan
| | - Daisuke Tanaka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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31
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Nakatsuka S, Watanabe Y, Kamakura Y, Horike S, Tanaka D, Hatakeyama T. Solvent‐Vapor‐Induced Reversible Single‐Crystal‐to‐Single‐Crystal Transformation of a Triphosphaazatriangulene‐Based Metal–Organic Framework. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912195] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yusuke Watanabe
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yoshinobu Kamakura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Satoshi Horike
- Institute for Integrated Cell-Material Sciences Institute for Advanced Study Kyoto University Yoshida-Honmachi, Sakyo-ku Kyoto 606-8501 Japan
| | - Daisuke Tanaka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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32
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Nakatsuka S, Watanabe Y, Kamakura Y, Horike S, Tanaka D, Hatakeyama T. Back Cover: Solvent‐Vapor‐Induced Reversible Single‐Crystal‐to‐Single‐Crystal Transformation of a Triphosphaazatriangulene‐Based Metal–Organic Framework (Angew. Chem. Int. Ed. 4/2020). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201915344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yusuke Watanabe
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Yoshinobu Kamakura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Satoshi Horike
- Institute for Integrated Cell-Material Sciences Institute for Advanced Study Kyoto University Yoshida-Honmachi, Sakyo-ku Kyoto 606-8501 Japan
| | - Daisuke Tanaka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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33
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Oda S, Kawakami B, Kawasumi R, Okita R, Hatakeyama T. Multiple Resonance Effect-Induced Sky-Blue Thermally Activated Delayed Fluorescence with a Narrow Emission Band. Org Lett 2019; 21:9311-9314. [DOI: 10.1021/acs.orglett.9b03342] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Bungo Kawakami
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551, Japan
| | - Ryota Okita
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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34
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Oda S, Shimizu T, Katayama T, Yoshikawa H, Hatakeyama T. Tetracoordinate Boron-Fused Double [5]Helicenes as Cathode Active Materials for Lithium Batteries. Org Lett 2019; 21:1770-1773. [DOI: 10.1021/acs.orglett.9b00337] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Susumu Oda
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takeshi Shimizu
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takazumi Katayama
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Hirofumi Yoshikawa
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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35
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Agata R, Takaya H, Matsuda H, Nakatani N, Takeuchi K, Iwamoto T, Hatakeyama T, Nakamura M. Iron-Catalyzed Cross Coupling of Aryl Chlorides with Alkyl Grignard Reagents: Synthetic Scope and FeII/FeIV Mechanism Supported by X-ray Absorption Spectroscopy and Density Functional Theory Calculations. BCSJ 2019. [DOI: 10.1246/bcsj.20180333] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ryosuke Agata
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hikaru Takaya
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hiroshi Matsuda
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Naoki Nakatani
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Katsuhiko Takeuchi
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takahiro Iwamoto
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Takuji Hatakeyama
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Masaharu Nakamura
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research (ICR), Kyoto University, Uji, Kyoto 611-0011, Japan
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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36
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Oda S, Abe H, Yasuda N, Hatakeyama T. Synthesis of Tetracoordinate Boron‐Fused Benzoaceanthrylene Analogs via Tandem Electrophilic C−H Borylation. Chem Asian J 2019; 14:1657-1661. [DOI: 10.1002/asia.201801682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/07/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hiroaki Abe
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1, Kouto Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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37
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Maeda H, Kameda M, Hatakeyama T, Morisaki Y. π-Stacked Polymer Consisting of a Pseudo⁻ meta⁻[2.2]Paracyclophane Skeleton. Polymers (Basel) 2018; 10:polym10101140. [PMID: 30961065 PMCID: PMC6403781 DOI: 10.3390/polym10101140] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/26/2018] [Accepted: 10/02/2018] [Indexed: 11/21/2022] Open
Abstract
A novel π-stacked polymer based on a pseudo–meta–linked [2.2]paracyclophane moieties was synthesized by Sonogashira-Hagihara coupling. The UV-vis absorption spectra of the synthesized polymer and model compounds revealed an extension of the conjugation length owing to the through-space conjugation. The optical properties of the π-stacked dimer with the pseudo–meta–linked [2.2]paracyclophane unit were compared with those of the corresponding dimers with the pseudo–ortho– and pseudo–para–linked [2.2]paracyclophane units.
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Affiliation(s)
- Hazuki Maeda
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan.
| | - Mayu Kameda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan.
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan.
| | - Yasuhiro Morisaki
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan.
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38
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Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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39
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Gotoh H, Nakatsuka S, Kondo Y, Sasada Y, Hatakeyama T. Triangulene-based Efficient Exciton Blocking Material for Organic Light-emitting Diodes. CHEM LETT 2018. [DOI: 10.1246/cl.180314] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hajime Gotoh
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Yasuhiro Kondo
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551, Japan
| | - Yasuyuki Sasada
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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40
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Kawai S, Nakatsuka S, Hatakeyama T, Pawlak R, Meier T, Tracey J, Meyer E, Foster AS. Multiple heteroatom substitution to graphene nanoribbon. Sci Adv 2018; 4:eaar7181. [PMID: 29662955 PMCID: PMC5898832 DOI: 10.1126/sciadv.aar7181] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 02/23/2018] [Indexed: 05/20/2023]
Abstract
Substituting heteroatoms into nanostructured graphene elements, such as graphene nanoribbons, offers the possibility for atomic engineering of electronic properties. To characterize these substitutions, functionalized atomic force microscopy (AFM)-a tool to directly resolve chemical structures-is one of the most promising tools, yet the chemical analysis of heteroatoms has been rarely performed. We synthesized multiple heteroatom-substituted graphene nanoribbons and showed that AFM can directly resolve elemental differences and can be correlated to the van der Waals radii, as well as the modulated local electron density caused by the substitution. This elemental-sensitive measurement takes an important step in the analysis of functionalized two-dimensional carbon materials.
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Affiliation(s)
- Shigeki Kawai
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Corresponding author. (S.K.); (T.H.); (A.S.F.)
| | - Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Hyogo, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Hyogo, Japan
- Corresponding author. (S.K.); (T.H.); (A.S.F.)
| | - Rémy Pawlak
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - Tobias Meier
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - John Tracey
- Department of Applied Physics, Aalto University, Espoo, Finland
| | - Ernst Meyer
- Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
| | - Adam S. Foster
- Department of Applied Physics, Aalto University, Espoo, Finland
- Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan
- Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany
- Corresponding author. (S.K.); (T.H.); (A.S.F.)
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41
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Affiliation(s)
- Kohei Matsui
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Susumu Oda
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kazuki Yoshiura
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kiichi Nakajima
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takuji Hatakeyama
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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42
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Yamashita T, Hatakeyama T, Sato K, Fukui Y, Hishikawa N, Ohta Y, Nishiyama Y, Kawai N, Tamiya T, Abe K. Hyper-glucose metabolism in the cervical spinal cord of ALS patients. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Nakatsuka S, Gotoh H, Kageyama A, Sasada Y, Ikuta T, Hatakeyama T. 5,9-Dioxa-13b-Oxophosphanaphtho[3,2,1-de]anthracenes Prepared by Tandem Phospha-Friedel–Crafts Reaction as Hole-/Exciton-Blocking Materials for OLEDs. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00242] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Soichiro Nakatsuka
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Hajime Gotoh
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Akiko Kageyama
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551, Japan
| | - Yasuyuki Sasada
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551, Japan
| | - Toshiaki Ikuta
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551, Japan
| | - Takuji Hatakeyama
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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44
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Nakatsuka S, Gotoh H, Kinoshita K, Yasuda N, Hatakeyama T. Rücktitelbild: Divergent Synthesis of Heteroatom-Centered 4,8,12-Triazatriangulenes (Angew. Chem. 18/2017). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Keisuke Kinoshita
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI); 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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45
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Nakatsuka S, Gotoh H, Kinoshita K, Yasuda N, Hatakeyama T. Back Cover: Divergent Synthesis of Heteroatom-Centered 4,8,12-Triazatriangulenes (Angew. Chem. Int. Ed. 18/2017). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201702884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Keisuke Kinoshita
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI); 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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Nakatsuka S, Gotoh H, Kinoshita K, Yasuda N, Hatakeyama T. Divergent Synthesis of Heteroatom-Centered 4,8,12-Triazatriangulenes. Angew Chem Int Ed Engl 2017; 56:5087-5090. [DOI: 10.1002/anie.201701246] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Keisuke Kinoshita
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI); 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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47
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Affiliation(s)
- Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Keisuke Kinoshita
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI); 1-1-1, Kouto, Sayo-cho Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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48
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Orchard G, Hatakeyama T, Waker A. The spatial dose rate and energy characterization of a P 385 D-D Neutron Generator using a nested neutron spectrometer and a tissue equivalent proportional counter. RADIAT MEAS 2017. [DOI: 10.1016/j.radmeas.2016.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kanamori H, Hatakeyama T, Uchiyama B, Weber DJ, Takeuchi M, Endo S, Hirakata Y, Kaku M. Clinical and molecular epidemiological features of tuberculosis after the 2011 Japan earthquake and tsunami. Int J Tuberc Lung Dis 2017; 20:505-14. [PMID: 26970161 DOI: 10.5588/ijtld.15.0607] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To investigate clinical characteristics and prognosis in tuberculosis (TB) patients and the transmission dynamics of TB after the 2011 Japan earthquake and tsunami. METHOD This was a retrospective observational cohort study. Data were analyzed among 93 pulmonary TB patients (tsunami-affected areas 25, non-tsunami areas 68) hospitalized during March 2011-March 2012 with 1-year follow-up since treatment commencement. Variable number of tandem repeats (VNTR) typing was conducted for 38 TB strains (tsunami-affected areas 21, non-tsunami areas 17). RESULTS Patients from tsunami-affected areas were significantly more likely to be refugees (OR 12.8, 95%CI 2.45-67.20), receive oxygenation (OR 5.0, 95%CI 1.68-14.85), and have a unique VNTR (OR 4.6, 95%CI 1.14-18.41). Patients who died within 1 year were significantly more likely to be older (OR 9.8, 95%CI 1.85-180.26), partially dependent or dependent (OR 11.9, 95%CI 4.28-37.62), and to require oxygenation (OR 4.3, 95%CI 1.47-12.89), and had lower serum albumin levels (OR 11.1, 95%CI 2.97-72.32). CONCLUSION Risk factors for prognosis of TB after the earthquake were associated with advanced age, low serum albumin level, functional status at admission, and oxygen requirement. The VNTR results suggest that most of the cases with pulmonary TB experienced reactivation of latent tuberculous infection, likely due to the impact of the earthquake and tsunami.
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Affiliation(s)
- H Kanamori
- Miyagi Cardiovascular and Respiratory Center, Kurihara, Miyagi, Japan; Department of Infection Control and Laboratory Diagnostics, Internal Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Division of Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - T Hatakeyama
- Department of Microbiology, Miyagi Prefectural Institute of Public Health and Environment, Sendai, Miyagi, Japan
| | - B Uchiyama
- Miyagi Cardiovascular and Respiratory Center, Kurihara, Miyagi, Japan
| | - D J Weber
- Division of Infectious Diseases, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - M Takeuchi
- Miyagi Cardiovascular and Respiratory Center, Kurihara, Miyagi, Japan
| | - S Endo
- Department of Infection Control and Laboratory Diagnostics, Internal Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Y Hirakata
- Miyagi Cardiovascular and Respiratory Center, Kurihara, Miyagi, Japan
| | - M Kaku
- Department of Infection Control and Laboratory Diagnostics, Internal Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
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50
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Numano M, Nagami N, Nakatsuka S, Katayama T, Nakajima K, Tatsumi S, Yasuda N, Hatakeyama T. Synthesis of Boronate‐Based Benzo[
fg
]tetracene and Benzo[
hi
]hexacene via Demethylative Direct Borylation. Chemistry 2016; 22:11574-7. [DOI: 10.1002/chem.201602753] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Misa Numano
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Naoto Nagami
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Soichiro Nakatsuka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Takazumi Katayama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Kiichi Nakajima
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Sou Tatsumi
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University, 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University, Katsura Kyoto 615-8520 Japan
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