1
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Tsuji H, Nakahata M, Hishida M, Seto H, Motokawa R, Inoue T, Egawa Y. Water Fraction Dependence of the Aggregation Behavior of Hydrophobic Fluorescent Solutes in Water-Tetrahydrofuran. J Phys Chem Lett 2023; 14:11235-11241. [PMID: 38060373 PMCID: PMC10726388 DOI: 10.1021/acs.jpclett.3c02882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/15/2023] [Accepted: 11/20/2023] [Indexed: 12/20/2023]
Abstract
This work investigates the water fraction dependence of the aggregation behavior of hydrophobic solutes in water-tetrahydrofuran (THF) and the elucidation of the role of THF using fluorescence microscopy, dynamic light scattering, neutron and X-ray scattering, and photoluminescence measurements. On the basis of the obtained results, the following model is proposed: hydrophobic molecules are molecularly dispersed in the low-water-content region (10-20 vol %), while they form mesoscopic particles upon increasing the water fraction to ∼30 vol %. This abrupt change is due to the composition fluctuation of the water-THF binary system to form hydrophobic areas in THF, followed by THF-rich droplets where hydrophobic solutes are incorporated and form loose aggregates. Further increasing the water content prompts the desolvation of THF, which decreases the particle size and generates tight aggregates of solute molecules. This model is consistent with the luminescence behavior of the solutes and will be helpful to control the aggregation state of hydrophobic solutes in various applications.
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Affiliation(s)
- Hayato Tsuji
- Department
of Chemistry, Faculty of Science, Kanagawa
University, 3-27-1 Rokkaku-bashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Masaki Nakahata
- Department
of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Mafumi Hishida
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162−8601, Japan
| | - Hideki Seto
- Institute
of Materials Structure Science / J-PARC Center, High Energy Accelerator Research Organization, Tokai, Ibaraki 319-1106, Japan
| | - Ryuhei Motokawa
- Materials
Sciences Research Center, Japan Atomic Energy
Agency, Tokai, Ibaraki 319-1195, Japan
| | - Takeru Inoue
- Department
of Chemistry, Faculty of Science, Kanagawa
University, 3-27-1 Rokkaku-bashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Yasunobu Egawa
- Department
of Chemistry, Faculty of Science, Kanagawa
University, 3-27-1 Rokkaku-bashi, Kanagawa-ku, Yokohama 221-8686, Japan
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2
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Wu CC, Li EY, Chou PT. Reducing the internal reorganization energy via symmetry controlled π-electron delocalization. Chem Sci 2022; 13:7181-7189. [PMID: 35799804 PMCID: PMC9214956 DOI: 10.1039/d2sc01851a] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 05/24/2022] [Indexed: 12/30/2022] Open
Abstract
The magnitude of the reorganization energy is closely related to the nonradiative relaxation rate, which affects the photoemission quantum efficiency, particularly for the emission with a lower energy gap toward the near IR (NIR) region. In this study, we explore the relationship between the reorganization energy and the molecular geometry, and hence the transition density by computational methods using two popular models of NIR luminescent materials: (1) linearly conjugated cyanine dyes and (2) electron donor–acceptor (D–A) composites with various degrees of charge transfer (CT) character. We find that in some cases, reorganization energies can be significantly reduced to 50% despite slight structural modifications. Detailed analyses indicate that the reflection symmetry plays an important role in linear cyanine systems. As for electron donor–acceptor systems, both the donor strength and the substitution position affect the relative magnitude of reorganization energies. If CT is dominant and creates large spatial separation between HOMO and LUMO density distributions, the reorganization energy is effectively increased due to the large electron density variation between S0 and S1 states. Mixing a certain degree of local excitation (LE) with CT in the S1 state reduces the reorganization energy. The principles proposed in this study are also translated into various pathways of canonically equivalent π-conjugation resonances to represent intramolecular π-delocalization, the concept of which may be applicable, in a facile manner, to improve the emission efficiency especially in the NIR region. The reorganization energies may be significantly reduced by molecular symmetry effect.![]()
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Affiliation(s)
- Chi-Chi Wu
- Department of Chemistry, National Taiwan Normal University, No. 88, Section 4, Tingchow Road, Taipei 116, Taiwan
| | - Elise Y. Li
- Department of Chemistry, National Taiwan Normal University, No. 88, Section 4, Tingchow Road, Taipei 116, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan
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3
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Furukawa M, Nakabayashi K, Mori H. Aggregation‐induced
multicolor luminescent nanoparticles with adaptive and fixed cores derived from brominated
tetraphenylethene‐containing
block copolymer. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20200886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Masaki Furukawa
- Graduate School of Organic Materials Science Yamagata University Yonezawa Japan
| | | | - Hideharu Mori
- Graduate School of Organic Materials Science Yamagata University Yonezawa Japan
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4
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Inoue T, Tsurui M, Yamagishi H, Nakazawa Y, Hamaguchi N, Watanabe S, Kitagawa Y, Hasegawa Y, Yamamoto Y, Tsuji H. Long-wavelength visible to near infrared photoluminescence from carbon-bridged styrylstilbene and thiadiazole conjugates in organic and aqueous media. RSC Adv 2021; 11:6008-6013. [PMID: 35423131 PMCID: PMC8694805 DOI: 10.1039/d0ra10201f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/24/2021] [Indexed: 12/03/2022] Open
Abstract
Donor–acceptor–donor conjugates composed of electron-donating carbon-bridged styrylstilbene (COPV2) and electron-accepting thiadiazole derivatives equipped with carbazolyl (Cz) terminators, Cz-COPV2-A-COPV2-Cz (A = benzothiadiazole (BTz), naphthobis(thiadiazole) (NTz), or benzobis(thiadiazole) (BBTz)), were newly synthesized and found to serve as efficient and stable long-wavelength photoluminescent dyes in organic and aqueous media. In particular, Cz-COPV2-BBTz-COPV2-Cz showed photoluminescence in the near infrared region (895–927 nm) with a photoluminescence quantum yield (PLQY) of up to 0.19 in cyclohexane and of 0.02–0.03 in THF/water mixtures. Its analogues with weaker acceptors, Cz-COPV2-BTz-COPV2-Cz and Cz-COPV2-NTz-COPV2-Cz, showed yellow to deep-red emission in organic solvents, with PLQYs of up to 0.71 in organic solvents and 0.45 in THF/water mixtures. Efficient long-wavelength visible to NIR-emitting materials have been synthesized by use of rigid planar styrylstilbene as a donor component.![]()
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Affiliation(s)
- Takeru Inoue
- Department of Chemistry, Faculty of Science, Kanagawa University Tsuchiya 2946 Hiratsuka 259-1293 Japan
| | - Makoto Tsurui
- Faculty of Engineering, Hokkaido University Kita13 Nishi8, Kita-ku Sapporo 060-8628 Japan
| | - Hiroshi Yamagishi
- Department of Materials Science, Faculty of Pure and Applied Sciences, Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8573 Japan
| | - Yuma Nakazawa
- Department of Chemistry, Faculty of Science, Kanagawa University Tsuchiya 2946 Hiratsuka 259-1293 Japan
| | - Naoto Hamaguchi
- Department of Chemistry, Faculty of Science, Kanagawa University Tsuchiya 2946 Hiratsuka 259-1293 Japan
| | - Shoya Watanabe
- Department of Chemistry, Faculty of Science, Kanagawa University Tsuchiya 2946 Hiratsuka 259-1293 Japan
| | - Yuichi Kitagawa
- Faculty of Engineering, Hokkaido University Kita13 Nishi8, Kita-ku Sapporo 060-8628 Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University Kita13 Nishi8, Kita-ku Sapporo 060-8628 Japan
| | - Yohei Yamamoto
- Department of Materials Science, Faculty of Pure and Applied Sciences, Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8573 Japan
| | - Hayato Tsuji
- Department of Chemistry, Faculty of Science, Kanagawa University Tsuchiya 2946 Hiratsuka 259-1293 Japan
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5
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Kumsampao J, Chaiwai C, Chasing P, Chawanpunyawat T, Namuangruk S, Sudyoadsuk T, Promarak V. A Simple and Strong Electron-Deficient 5,6-Dicyano[2,1,3]benzothiadiazole-Cored Donor-Acceptor-Donor Compound for Efficient Near Infrared Thermally Activated Delayed Fluorescence. Chem Asian J 2020; 15:3029-3036. [PMID: 32748490 DOI: 10.1002/asia.202000727] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/29/2020] [Indexed: 11/11/2022]
Abstract
Despite the success of thermally activated delayed fluorescent (TADF) materials in steering the next generation of organic light-emitting diodes (OLEDs), effective near infrared (NIR) TADF emitters are still very rare. Here, we present a simple and extremely high electron-deficient compound, 5,6-dicyano[2,1,3]benzothiadiazole (CNBz), as a strong electron-accepting unit to develop a sufficiently strong donor-acceptor (D-A) interaction for NIR emission. End-capping with the electron-donating triphenylamine (TPA) unit created an effective D-A-D type system, giving rise to an efficient NIR TADF emissive molecule (λem =750 nm) with a very small ΔEST of 0.06 eV. The electroluminescent device using this NIR TADF emitter exhibited an excellent performance with a high maximum radiance of 10020 mW Sr-1 m-2 , a maximum EQE of 6.57% and a peak wavelength of 712 nm.
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Affiliation(s)
- Jakkapan Kumsampao
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Chaiyon Chaiwai
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Thanyarat Chawanpunyawat
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Supawadee Namuangruk
- National Nanotechnology Center, National Science and Technology Development Agency, Pathumthani, 12120, Thailand
| | - Taweesak Sudyoadsuk
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand.,Research Network of NANOTEC-VISTEC on Nanotechnology for Energy, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
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6
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Ishi-i T, Kawai K, Shirai Y, Kitahara I, Hagiwara Y. Amphiphilic triphenylamine–benzothiadiazole dyes: preparation, fluorescence and aggregation behavior, and enzyme fluorescence detection. Photochem Photobiol Sci 2019; 18:1447-1460. [DOI: 10.1039/c8pp00593a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Change of aggregate stabilization based on removal of the galactopyranose moiety leads to an emission enhancement to detect β-galactosidase activity.
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Affiliation(s)
- Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Kazuki Kawai
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Yuya Shirai
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Ikumi Kitahara
- Material Engineering Advanced Course
- Advanced Engineering School
- National Institute of Technology
- Kurume College
- Kurume 830-8555
| | - Yoshinori Hagiwara
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
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7
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Ishi-i T, Tanaka H, Youfu R, Aizawa N, Yasuda T, Kato SI, Matsumoto T. Mechanochromic fluorescence based on a combination of acceptor and bulky donor moieties: tuning emission color and regulating emission change direction. NEW J CHEM 2019. [DOI: 10.1039/c8nj06050a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Mechanochromic fluorescence based on a conventional strategy using a donor–acceptor structure bearing nonplanar three-dimensional donor moieties was studied.
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Affiliation(s)
- Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Honoka Tanaka
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Ryusuke Youfu
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Naoya Aizawa
- INAMORI Frontier Research Center (IFRC)
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Takuma Yasuda
- INAMORI Frontier Research Center (IFRC)
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Shin-ichiro Kato
- Department of Materials Science
- School of Engineering
- The University of Shiga Prefecture
- Hikone 522-8533
- Japan
| | - Taisuke Matsumoto
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga 816-8580
- Japan
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8
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Higashino T, Kurumisawa Y, Nimura S, Iiyama H, Imahori H. Enhanced Donor-π-Acceptor Character of a Porphyrin Dye Incorporating Naphthobisthiadiazole for Efficient Near-Infrared Light Absorption. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701736] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tomohiro Higashino
- Department of Molecular Engineering; Graduate School of Engineering; Kyoto University; Nishikyo-ku 615-8510 Kyoto Japan
| | - Yuma Kurumisawa
- Department of Molecular Engineering; Graduate School of Engineering; Kyoto University; Nishikyo-ku 615-8510 Kyoto Japan
| | - Shimpei Nimura
- Department of Molecular Engineering; Graduate School of Engineering; Kyoto University; Nishikyo-ku 615-8510 Kyoto Japan
| | - Hitomi Iiyama
- Department of Molecular Engineering; Graduate School of Engineering; Kyoto University; Nishikyo-ku 615-8510 Kyoto Japan
| | - Hiroshi Imahori
- Department of Molecular Engineering; Graduate School of Engineering; Kyoto University; Nishikyo-ku 615-8510 Kyoto Japan
- Institute for Integrated Cell-Material Sciences; Kyoto University; Sakyo-ku 606-8501 Kyoto Japan
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9
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Ishi-i T, Moriyama Y. Bis(thiadiazole)quinoxaline- and bis(thiadiazole)phenanthroquinoxaline-based donor–acceptor type dyes showing simultaneous emission efficiency and color changes from molecular aggregation and twisted intramolecular charge transfer. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Ventura B, Poronik YM, Deperasińska I, Gryko DT. How a Small Structural Difference Can Turn Optical Properties of π-Extended Coumarins Upside Down: The Role of Non-Innocent Saturated Rings. Chemistry 2016; 22:15380-15388. [DOI: 10.1002/chem.201603038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Indexed: 02/04/2023]
Affiliation(s)
| | - Yevgen M. Poronik
- Institute of Organic Chemistry PAS; 44/52 Kasprzaka str. 01-224 Warsaw Poland
| | | | - Daniel T. Gryko
- Institute of Organic Chemistry PAS; 44/52 Kasprzaka str. 01-224 Warsaw Poland
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11
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Yamada S, Sanada Y, Fujii S, Kitahara I, Akiba I, Ishi-I T, Sakurai K. Micelle formation and red-light fluorescence emission of benzothiadiazole–triphenylamine amphiphilic molecules in water/methanol solutions explored with synchrotron small-angle X-ray scattering. Polym J 2016. [DOI: 10.1038/pj.2016.56] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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12
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Ishi-i T, Moriyama Y, Kusakaki Y. Turn-on-type emission enhancement and ratiometric emission color change based on the combination effect of aggregation and TICT found in the hexaazatriphenylene-triphenylamine dye in an aqueous environment. RSC Adv 2016. [DOI: 10.1039/c6ra18320d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Turn-on-type emission enhancement and a ratiometric emission color change were achieved simultaneously due to the aggregation and TICT of a donor–acceptor-type dye.
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Affiliation(s)
- Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Yuriko Moriyama
- Department of Biochemistry and Applied Chemistry
- National Institute of Technology
- Kurume College
- Kurume 830-8555
- Japan
| | - Yutarou Kusakaki
- Material Engineering Advanced Course
- Advanced Engineering School
- National Institute of Technology
- Kurume College
- Kurume 830-8555
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13
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Ishi-i T. Light-emitting Donor-acceptor Dyes in Water: Creation of Light-emitting System Based on Aggregation of Donor-acceptor Dyes. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry, National Institute of Technology, Kurume College
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14
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Yasuda T, Shinohara Y, Kusagaki Y, Matsuda T, Han L, Ishi-i T. Synthesis and photovoltaic properties of naphthobisthiadiazole-triphenylamine-based donor–acceptor π-conjugated polymer. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Ishi-i T, Kitahara I, Yamada S, Sanada Y, Sakurai K, Tanaka A, Hasebe N, Yoshihara T, Tobita S. Amphiphilic benzothiadiazole–triphenylamine-based aggregates that emit red light in water. Org Biomol Chem 2015; 13:1818-28. [DOI: 10.1039/c4ob02181a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An amphiphilic donor–acceptor dye can provide red light emission in water in an aggregate state.
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Affiliation(s)
- Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry
- Kurume National College of Technology
- Kurume 830-8555
- Japan
| | - Ikumi Kitahara
- Department of Biochemistry and Applied Chemistry
- Kurume National College of Technology
- Kurume 830-8555
- Japan
| | - Shimpei Yamada
- Department of Chemistry and Biochemistry
- The University of Kitakyushu
- Kitakyushu 808-0135
- Japan
- Structural Materials Science Laboratory SPring-8 Center
| | - Yusuke Sanada
- Department of Chemistry and Biochemistry
- The University of Kitakyushu
- Kitakyushu 808-0135
- Japan
- Structural Materials Science Laboratory SPring-8 Center
| | - Kazuo Sakurai
- Department of Chemistry and Biochemistry
- The University of Kitakyushu
- Kitakyushu 808-0135
- Japan
- Structural Materials Science Laboratory SPring-8 Center
| | - Asami Tanaka
- Division of Molecular Science
- Graduate School of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Naoya Hasebe
- Division of Molecular Science
- Graduate School of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Toshitada Yoshihara
- Division of Molecular Science
- Graduate School of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Seiji Tobita
- Division of Molecular Science
- Graduate School of Science and Technology
- Gunma University
- Kiryu
- Japan
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