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Zhao W, Hu X, Kong F, Tang J, Yan D, Wang J, Liu Y, Sun Y, Sheng R, Chen P. Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers. MICROMACHINES 2024; 15:626. [PMID: 38793199 PMCID: PMC11123088 DOI: 10.3390/mi15050626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024]
Abstract
White organic light-emitting diodes (WOLEDs) hold vast prospects in the fields of next-generation displays and solid-state lighting. Ultrathin emitting layers (UEMLs) have become a research hotspot because of their unique advantage. On the basis of simplifying the device structure and preparation process, they can achieve electroluminescent performance comparable to that of doped devices. In this review, we first discuss the working principles and advantages of WOLEDs based on UEML architecture, which can achieve low cost and more flexibility by simplifying the device structure and preparation process. Subsequently, the successful applications of doping and non-doping technologies in fluorescent, phosphorescent, and hybrid WOLEDs combined with UEMLs are discussed, and the operation mechanisms of these WOLEDs are emphasized briefly. We firmly believe that this article will bring new hope for the development of UEML-based WOLEDs in the future.
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Affiliation(s)
- Wencheng Zhao
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Xiaolin Hu
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Fankang Kong
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Jihua Tang
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Duxv Yan
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Jintao Wang
- Institute of Information Engineering, Yantai Institute of Technology, Yantai 264005, China;
| | - Yuru Liu
- Institute of Engineering Training Center, Yantai University, Yantai 264005, China;
| | - Yuanping Sun
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Ren Sheng
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
| | - Ping Chen
- Institute of Physics and Electronic Information, Yantai University, Yantai 264005, China; (W.Z.); (X.H.); (F.K.); (J.T.); (D.Y.); (Y.S.)
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Wei Y, Wang R, Wang M, Hu L, Zhang X, Xu Y, Liu Y, Lan F, Chen J. Research status and prospects of organic photocatalysts in algal inhibition and sterilization: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:5013-5031. [PMID: 38147259 DOI: 10.1007/s11356-023-31665-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 12/18/2023] [Indexed: 12/27/2023]
Abstract
An increasing amount of sewage has been discharged into water bodies in the progression of industrialization and urbanization, causing serious water pollution. Meanwhile, the increase of nutrients in the water induces water eutrophication and rapid growth of algae. Photocatalysis is a common technique for algal inhibition and sterilization. To improve the utilization of visible light and the conversion efficiency of solar energy, more organic photocatalytic materials have been gradually developed. In addition to ultraviolet light, partial infrared light and visible light could also be used by organic photocatalysts compared with inorganic photocatalysts. Simultaneously, organic photocatalysts also exhibit favorable stability. Most organic photocatalysts can maintain a high degradation rate for algae and bacteria after several cycles. There are various organic semiconductors, mainly including small organic molecules, such as perylene diimide (PDI), porphyrin (TCPP), and new carbon materials (fullerene (C60), graphene (GO), and carbon nanotubes (CNT)), and large organic polymers, such as graphite phase carbon nitride (g-C3N4), polypyrrole (PPy), polythiophene (PTH), polyaniline (PANI), and polyimide (PI). In this review, the classification and synthesis methods of organic photocatalytic materials were elucidated. It was demonstrated that the full visible spectral response (400-750 nm) could be stimulated by modifying organic photocatalysts. Moreover, some problems were summarized based on the research status related to algae and bacteria, and corresponding suggestions were also provided for the development of organic photocatalytic materials.
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Affiliation(s)
- Yushan Wei
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Renjun Wang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Mengjiao Wang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Lijun Hu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Xinyi Zhang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Yuling Xu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Yanyan Liu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Feng Lan
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Junfeng Chen
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China.
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Makino Y, Yoshida M, Hayashi S, Sasaki T, Takamizawa S, Kobayashi A, Kato M. Elastic and bright assembly-induced luminescent crystals of platinum(II) complexes with near-unity emission quantum yield. Dalton Trans 2023. [PMID: 36847788 DOI: 10.1039/d3dt00192j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Molecular crystals of Pt(II) complexes with metallophilic interactions can provide bright assembly-induced luminescence with colour tunability. However, the brittleness of many of these crystals makes their application in flexible optical materials difficult. Herein, we have achieved the elastic deformation of crystals of polyhalogenated Pt(II) complexes exhibiting bright assembly-induced luminescence. A crystal of [Pt(bpic)(dFppy)] (Hbpic = 5-bromopicolinic acid, HdFppy = 2-(2,4-difluorophenyl)pyridine) and a co-crystal of [Pt(bpic)(dFppy)] and [Pt(bpic)(ppy)] (Hppy = 2-phenylpyridine) were found to exhibit significant elastic deformation due to their highly anisotropic interaction topologies. While the crystal of [Pt(bpic)(dFppy)] exhibited monomer-based ligand-centred 3ππ* emission with an emission quantum yield of 0.40, the co-crystal exhibited bright, triplet metal-metal-to-ligand charge transfer (3MMLCT) emission owing to Pt⋯Pt interactions, thereby achieving a significantly higher emission quantum yield of 0.94.
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Affiliation(s)
- Yusuke Makino
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaki Yoshida
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.,Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan.
| | - Shotaro Hayashi
- School of Environmental Science and Engineering and Research Centre for Molecular Design, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Toshiyuki Sasaki
- Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Satoshi Takamizawa
- Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Atsushi Kobayashi
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masako Kato
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.,Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan.
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Mandal S, Binti Bakaruddin BR, Jeon S, Lee Y, Kim KW. Assessment of the recycling potential of valuable metals by mapping the elemental composition in discarded light-emitting diodes (LEDs). JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 328:116900. [PMID: 36512948 DOI: 10.1016/j.jenvman.2022.116900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 11/15/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
Electronic waste (e-waste) is the world's fastest-growing type of waste, with lighting accounting for 9% of the total. Light-emitting diodes (LEDs) are composed of the most concentrated critical elements (Ag and Au) and recovery of these metals could generate economic benefits and reduce the burdens of environmental pollution; nevertheless, the absence of information about their composition currently presents a challenge in recycling these metals with minimal prospects for recovery. This study assessed the distribution and variation of elemental concentrations of 16 different elements in three generations of LEDs (12 different LED units): sub-mounted-device (SMD #10), chip-on-board (COB #1), and positive-intrinsic-negative (PIN #1). The SMD LEDs contained a considerable amount of Au with a median average concentration of 1204 mg/kg (ranging from 323 - 3687 mg/kg), which was similar to that of COB (1550 mg/kg), but higher than that of PIN LED (175 mg/kg). Based on the total threshold limiting concentration (TTLC), the Cu levels (605,823 mg/kg) in the SMD package exceeded the regulatory limits (2500 mg/kg). Concentrations of the hazardous elements Cr (29 mg/kg), Pb (12 mg/kg), Cd (0.1 mg/kg), and As (1 mg/kg) in the LED packages were within the regulatory limits. To recycle precious metals and other technological metals, a well-organized and dedicated optimized assessment of the value of metals is required especially in accordance with the concept of criticality and recyclability. Two factors, i.e., a high resource index (RI) and technology index (TI), suggest the importance of waste to the economy and has a significant potential for recycling with less processing burdens. Present findings indicated that the COB and a few of the studied SMD LEDs (3020, 4014, 5630, and 7020), exhibit high criticality and recyclability. For the RI and TI index, the contribution of metals such as Cu, Fe, Al, and Au were dominant. These findings can serve as a reference for the development of a viable approach for the recycling and recovery of targeted metals from LED e-waste.
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Affiliation(s)
- Sandip Mandal
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Balqis Raihan Binti Bakaruddin
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Seongbeom Jeon
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Yunho Lee
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea.
| | - Kyoung-Woong Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea.
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Karimi S, Shahroosvand H, Yaghoobi Nia N, Di Carlo A, Nazeeruddin MK. Versatile Electroluminescence Color-Tuning Strategy of an Efficient Light-Emitting Electrochemical Cell (LEC) by an Ionic Additive. Inorg Chem 2022; 61:20734-20742. [PMID: 36515661 DOI: 10.1021/acs.inorgchem.2c02165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The color-tuning strategies of solid-state light-emitting devices (ss-LEDs) are mainly focused on engineering molecular structures. In this paper, for the first time, we developed a facile strategy for tuning the electroluminescence (EL) color from orange to green through the addition of the ionic additive TBAP (tetrabutylammonium perchlorate). To achieve the active ionic emissive compound for use in a light-emitting electrochemical cell (LEC), the neutral biscyclometalated bromo tetrazole iridium(III) [Ir(ppy)2(BrTz)] was exchanged to its cationic complex, [Ir(ppy)2(BrTz-Me)]ClO4 (ppy = 2-phenyl pyridine, BrTz = 4-bromo-2-pyridine tetrazole, BrTz-Me = 4-bromo-2-pyridine methyl tetrazole) with a new synthetic strategy. This method allows employing neutral Ir-cyclometalated complexes, which are ruled out for use in LECs because of their non-ionic behaviors. In the following, an LEC based on the new cationic [Ir(ppy)2(BrTz-Me)]ClO4 as the emissive layer was fabricated between the FTO (fluorine-doped tin oxide) anode and Ga:In alloy cathode without using any additive or polymers, which makes this configuration the simplest ss-LED so far. By adding the ionic additives, the electroluminescence characteristics of [Ir(ppy)2(BrTz-Me)]ClO4 were dramatically increased, including luminance (L) from 162.8 cd/m2 for the device with an additive to 212.9 and 355.9 cd/m2 for devices containing LiTFSI (bis(trifluoromethane)sulfonamide lithium salt) and TBAP, respectively. In particular, when TBAP was added to the [Ir(ppy)2(BrTz-Me)]ClO4 complex, the irradiance was significantly increased from 166.4 to 220.8 μW/cm2 with an efficacy of 1.78 cd/A and external quantum efficiency (EQE) value of 2.14%. The obtained EL results clearly showed that adding TBAP and LiTFSI significantly improved the electroluminescence characteristics and tuned the electroluminescence color.
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Affiliation(s)
- Soheila Karimi
- Group for Molecular Engineering of Advanced Functional Materials (GMA), Department of Chemistry, University of Zanjan, Zanjan 45371-38111 Iran
| | - Hashem Shahroosvand
- Group for Molecular Engineering of Advanced Functional Materials (GMA), Department of Chemistry, University of Zanjan, Zanjan 45371-38111 Iran
| | - Narges Yaghoobi Nia
- CHOSE-Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", via del Politecnico 1, Rome 00133, Italy.,Istituto di Struttura della Materia (ISM-CNR), via del Fosso del Cavaliere 100, Rome 00133, Italy
| | - Aldo Di Carlo
- CHOSE-Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", via del Politecnico 1, Rome 00133, Italy.,Istituto di Struttura della Materia (ISM-CNR), via del Fosso del Cavaliere 100, Rome 00133, Italy
| | - Mohammad Khaja Nazeeruddin
- Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Federale de Lausanne, CH-1951 Sion, Switzerland
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Jiang X, Cheng J, Liu P, Gao Q, Liu L. Facile Preparation of Four-Layer MoS 2 Nanosheets and Their Application to Organic Light-Emitting Diode. NANOSCALE RESEARCH LETTERS 2022; 17:87. [PMID: 36066777 PMCID: PMC9448836 DOI: 10.1186/s11671-022-03726-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
High-quality four-layer molybdenum disulfide (MoS2) nanosheets with lateral dimension of about 11 µm were prepared by ultrasonic treatment of MoS2 powder with assistance of 1-methyl-2-pyrrolidone (NMP) solvent. The optimal preparation conditions for the preparation of MoS2 nanosheets were investigated from the aspects of ultrasonic processing time, ultrasonic power and amount ratio of MoS2 powder and NMP solvent. At the same time, the MoS2 nanosheets were employed as anode buffer layer in organic light-emitting diode (OLED) with copper nanowire (CuNW) film being anode. MoS2 nanosheets can reduce roughness of CuNW film, protect CuNW film from oxidation and improve work function of CuNW film. Experiments show that MoS2 nanosheets can significantly improve the current density and brightness of the OLED with CuNW film being anode. The maximum brightness of the OLED with MoS2 anode buffer layer is 2.15 times that of the OLED without MoS2 anode buffer layer. The current density of the OLED with MoS2 anode buffer layer is also obviously increased compared with the OLED without MoS2 anode buffer layer.
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Affiliation(s)
- Xingwang Jiang
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, China
- College of Electron and Information Engineering, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan, 528402, China
| | - Jie Cheng
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Ping Liu
- College of Electron and Information Engineering, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan, 528402, China.
| | - Qingguo Gao
- College of Electron and Information Engineering, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan, 528402, China
| | - Liming Liu
- College of Electron and Information Engineering, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan, 528402, China
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Chau YFC, Chang HE, Huang PS, Wu PC, Lim CM, Chiang LM, Wang TJ, Chao CTC, Kao TS, Shih MH, Chiang HP. Enhanced photoluminescence and shortened lifetime of DCJTB by photoinduced metal deposition on a ferroelectric lithography substrate. Sci Rep 2022; 12:6173. [PMID: 35418622 PMCID: PMC9007977 DOI: 10.1038/s41598-022-10303-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/30/2022] [Indexed: 11/09/2022] Open
Abstract
The photodeposition of metallic nanostructures onto ferroelectric surfaces could enable new applications based on the assembly of molecules and patterning local surface reactivity by enhancing surface field intensity. DCJTB (4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran) is an excellent fluorescent dye and dopant material with a high quantum efficiency used for OLED displays on the market. However, how to raise the photoluminescence (PL) and reduce the lifetime of DCJTB in a substrate remain extraordinary challenges for its application. Here, we demonstrate a tunable ferroelectric lithography plasmon-enhanced substrate to generate photo-reduced silver nanoparticles (AgNPs) and achieve enhanced PL with a shortened lifetime depending on the substrate's annealing time. The enhanced PL with shortened lifetimes can attribute to the localized electromagnetic (EM) wave produced by the nanotextured AgNPs layers' surface and gap plasmon resonances. The simulation is based on the three-dimensional finite element method to explain the mechanism of experimental results. Since the absorption increases, the remarkable enhanced PL of DCJTB can attain in the fabricated periodically proton exchanged (PPE) lithium niobate (LiNbO3) substrate. Furthermore, the proposed fabrication method demonstrates to help tune the surface EM wave distribution in the substrate, which can simultaneously achieve the significantly shortened lifetime and high PL intensity of DCJTB in the substrate. Compared with the un-annealed substrate, the PL intensity of DCJTB in the assembly metallic nanostructures is enhanced 13.70 times, and the PL's lifetime is reduced by 12.50%, respectively. Thus, the fabricated substrate can be a promising candidate, verifying chemically patterned ferroelectrics' satisfaction as a PL-active substrate.
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Affiliation(s)
- Yuan-Fong Chou Chau
- Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong, BE1410, Brunei Darussalam
| | - Hao-En Chang
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 202, Taiwan, ROC
| | - Po-Sheng Huang
- Department of Photonics, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Pin Chieh Wu
- Department of Photonics, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Chee Ming Lim
- Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong, BE1410, Brunei Darussalam
| | - Li-Ming Chiang
- Department of Photonics & Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan, ROC
| | - Tzyy-Jiann Wang
- Institute of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan, ROC
| | - Chung-Ting Chou Chao
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 202, Taiwan, ROC
| | - Tsung Sheng Kao
- Department of Photonics & Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan, ROC
| | - Min-Hsiung Shih
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan, ROC
| | - Hai-Pang Chiang
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 202, Taiwan, ROC.
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Hasan M, Saggar S, Shukla A, Bencheikh F, Sobus J, McGregor SKM, Adachi C, Lo SC, Namdas EB. Probing polaron-induced exciton quenching in TADF based organic light-emitting diodes. Nat Commun 2022; 13:254. [PMID: 35017481 PMCID: PMC8752634 DOI: 10.1038/s41467-021-27739-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 12/06/2021] [Indexed: 11/10/2022] Open
Abstract
Polaron-induced exciton quenching in thermally activated delayed fluorescence (TADF)-based organic light-emitting diodes (OLEDs) can lead to external quantum efficiency (EQE) roll-off and device degradation. In this study, singlet-polaron annihilation (SPA) and triplet-polaron annihilation (TPA) were investigated under steady-state conditions and their relative contributions to EQE roll-off were quantified, using experimentally obtained parameters. It is observed that both TPA and SPA can lead to efficiency roll-off in 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) doped OLEDs. Charge imbalance and singlet-triplet annihilation (STA) were found to be the main contributing factors, whereas the device degradation process is mainly dominated by TPA. It is also shown that the impact of electric field-induced exciton dissociation is negligible under the DC operation regime (electric field < 0.5 MV cm-1). Through theoretical simulation, it is demonstrated that improvement to the charge recombination rate may reduce the effect of polaron-induced quenching, and thus significantly decrease the EQE roll-off.
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Affiliation(s)
- Monirul Hasan
- School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, Australia
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Siddhartha Saggar
- School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, Australia
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Atul Shukla
- School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, Australia
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Fatima Bencheikh
- Center for Organic Photonics and Electronics Research, Kyushu University, Fukuoka, 819-0395, Japan
| | - Jan Sobus
- School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, Australia
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Sarah K M McGregor
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research, Kyushu University, Fukuoka, 819-0395, Japan.
| | - Shih-Chun Lo
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia.
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Ebinazar B Namdas
- School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, Australia.
- Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, QLD, 4072, Australia.
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9
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Novel D-A-D Fluorescent Dyes Based on 9-( p-Tolyl)-2,3,4,4a,9,9a-hexahydro-1 H-carbazole as a Donor Unit for Solution-Processed Organic Light-Emitting-Diodes. Molecules 2021; 26:molecules26102872. [PMID: 34066150 PMCID: PMC8151704 DOI: 10.3390/molecules26102872] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/26/2021] [Accepted: 05/08/2021] [Indexed: 12/01/2022] Open
Abstract
New fluorescent D-A-D dyes containing 9-(p-tolyl)-2,3,4,4a,9,9a-hexahydro-1H-carbazole as a donor unit and 2,1,3-benzochalcogenadiazoles as an electron-withdrawing group were synthesized. The photoluminescent and electroluminescent properties of novel dyes for fluorescent OLED application were investigated. It was demonstrated that the replacement of lightweight heteroatoms by heavier ones enables the fine tuning of the maximum emission without significantly reducing the luminescence quantum yield. The maximum quantum yield value of 62.6% for derivatives based on 2,1,3-benzoxadiazole (1a) in cyclohexane was achieved. Two devices with the architecture of glass/ITO/PEDOT-PSS/poly-TPD/EML/TPBi/LiF/Al (EML = emitting layer) were fabricated to check the suitability of the synthesized compounds as a single active emission layer in OLED. These OLEDs exhibited clear red electroluminescence of the dyes with the maximum current efficiency of 0.85 Cd/A.
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10
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Wakasugi C, Yoshida M, Sameera WMC, Shigeta Y, Kobayashi A, Kato M. Bright Luminescent Platinum(II)-Biaryl Emitters Synthesized Without Air-Sensitive Reagents. Chemistry 2020; 26:5449-5458. [PMID: 32086967 DOI: 10.1002/chem.201905821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/10/2020] [Indexed: 11/06/2022]
Abstract
Transition-metal complexes bearing biaryl-2,2'-diyl ligands tend to show intense luminescence. However, difficulties in synthesis have prevented their further functionalization and practical applications. Herein, a series of platinum(II) complexes bearing biaryl-2,2'-diyl ligands, which have never been prepared in air, were synthesized through transmetalation and successive cyclometalation of biarylboronic acids. This approach does not require any air- or moisture-sensitive reagents and features a simple synthesis even in air. The resulting (Et4 N)2 [Pt(m,n-F2 bph)(CN)2 ] (m,n-F2 bph=m,n-difluorobiphenyl-2,2'-diyl) complexes exhibit intense green emissions with high quantum efficiencies of up to 0.80 at 298 K. The emission spectral fitting and variable-temperature emission lifetime measurements indicate that the high quantum efficiency was achieved because of the tight packing structure and strong σ-donating ability of bph.
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Affiliation(s)
- Chuei Wakasugi
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku Sapporo, Hokkaido, 060-0810, Japan
| | - Masaki Yoshida
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku Sapporo, Hokkaido, 060-0810, Japan
| | - W M C Sameera
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku Sapporo, Hokkaido, 060-0810, Japan.,Current address: Institute of Low Temperature Science, Hokkaido University, North-19 West-8, Kita-ku, Sapporo, Hokkaido, 060-0819, Japan
| | - Yasuhiro Shigeta
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku Sapporo, Hokkaido, 060-0810, Japan.,Current address: Nanomaterials Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan
| | - Atsushi Kobayashi
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku Sapporo, Hokkaido, 060-0810, Japan
| | - Masako Kato
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku Sapporo, Hokkaido, 060-0810, Japan
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11
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Kostyuchenko AS, Ulyankin EB, Zheleznova TY, Chernenko SA, Shatsauskas AL, Abaidulina DR, Bystrushkin MO, Samsonenko AL, Fisyuk AS. Synthesis, Optical and Electrochemical Properties of D1–A–D2–A–D1 Type Conjugated Donor-Acceptor Assemblies of Five-Membered Aromatic Heterocycles. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02610-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Mori T, Yoshigoe Y, Kuninobu Y. Control of Multicolor and White Emission by Adjusting the Equilibrium between Fluorophores, Lewis Acids, and Their Complexes in Polymers. Angew Chem Int Ed Engl 2019; 58:14457-14461. [DOI: 10.1002/anie.201903408] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 08/05/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Toshiaki Mori
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yusuke Yoshigoe
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
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13
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Mori T, Yoshigoe Y, Kuninobu Y. Control of Multicolor and White Emission by Adjusting the Equilibrium between Fluorophores, Lewis Acids, and Their Complexes in Polymers. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903408] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Toshiaki Mori
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yusuke Yoshigoe
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
| | - Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
- Department of Molecular and Material Sciences Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasugakoen, Kasuga-shi Fukuoka 816-8580 Japan
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Muhamad Sarih N, Myers P, Slater A, Slater B, Abdullah Z, Tajuddin HA, Maher S. White Light Emission from a Simple Mixture of Fluorescent Organic Compounds. Sci Rep 2019; 9:11834. [PMID: 31413269 PMCID: PMC6694174 DOI: 10.1038/s41598-019-47847-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/18/2019] [Indexed: 11/18/2022] Open
Abstract
Three fluorescent organic compounds—furocoumarin (FC), dansyl aniline (DA), and 7-hydroxycoumarin-3-carboxylic acid (CC)—are mixed to produce almost pure white light emission (WLE). This novel mixture is immobilised in silica aerogel and applied as a coating to a UV LED to demonstrate its applicability as a low-cost, organic coating for WLE via simultaneous emission. In ethanol solution and when immobilised in silica aerogel, the mixture exhibits a Commission Internationale d’Eclairage (CIE) chromaticity index of (0.27, 0.33). It was observed that a broadband and simultaneous emission involving coumarin carboxylic acid, furocoumarin and dansyl aniline played a vital role in obtaining a CIE index close to that of pure white light.
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Affiliation(s)
- Norfatirah Muhamad Sarih
- Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK.,Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Peter Myers
- Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
| | - Anna Slater
- Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
| | - Ben Slater
- Materials Innovation Factory, Department of Chemistry, University of Liverpool, Liverpool, L7 3NY, UK
| | - Zanariah Abdullah
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Hairul Anuar Tajuddin
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Simon Maher
- Department of Electrical Engineering and Electronics, University of Liverpool, Brownlow Hill, Liverpool, L69 3GJ, UK.
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Light-Emitting Porphyrin Derivative Obtained from a Subproduct of the Cashew Nut Shell Liquid: A Promising Material for OLED Applications. MATERIALS 2019; 12:ma12071063. [PMID: 30939723 PMCID: PMC6479845 DOI: 10.3390/ma12071063] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/19/2019] [Accepted: 03/26/2019] [Indexed: 11/17/2022]
Abstract
In this work, the meso-tetra[4-(2-(3-n-pentadecylphenoxy)ethoxy]phenylporphyrin (H2P), obtained from the cashew nut shell liquid (CNSL), and its zinc (ZnP) and copper (CuP) metallic complexes, were applied as emitting layers in organic light emitting diodes (OLEDs). These compounds were characterized via optical and electrochemical analysis and the electroluminescent properties of the device have been studied. We performed a cyclic voltammetry analysis to determine the Highest Occupied Molecular Orbital (HOMO) and Lowest Unoccupied Molecular Orbital (LUMO) energy levels for the porphyrins, in order to select the proper materials to assemble the device. H2P and ZnP presented fluorescence emission band in the red region, from 601 nm to 718 nm. Moreover, we verified that the introduction of bulky substituents hinders the π–π stacking, favoring the emission in the film. In addition, the strongest emitter, ZnP, presented a threshold voltage of 4 V and the maximum irradiance of 10 μW cm−2 with a current density (J) of 15 mA cm−2 at 10 V. The CuP complex showed to be a favorable material for the design of OLEDs in the infrared. These results suggest that the porphyrins derived from a renewable source, such as CNSL, is a promising material to be used in organic optoelectronic devices such as OLEDs.
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Grolleau J, Petrov R, Allain M, Skene WG, Frère P. Solid-State Emission Enhancement via Molecular Engineering of Benzofuran Derivatives. ACS OMEGA 2018; 3:18542-18552. [PMID: 31458425 PMCID: PMC6643477 DOI: 10.1021/acsomega.8b02384] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 12/18/2018] [Indexed: 06/10/2023]
Abstract
A series of linear benzofuran derivatives consisting of either a vinylene or a cyanovinylene were prepared in order to investigate their emission properties. The X-ray crystallography of structurally similar derivatives was also evaluated. The crystalline structures of the vinylene derivatives showed only lateral contacts that involved the benzofurans and no π-stacking. In contrast, π-stacking was observed for the bisbenzofuran and benzofuran-phenyl cyanovinylene derivatives. No intermolecular π-π stacking was observed for the extended cyanovinylene structures. Intermolecular bonding between the nitrile and a furan atom was found. The fluorescence quantum yields (Φfl) of the vinylene derivatives were consistently high (>50%) in both solution and the crystal state. The exception was the benzofuran-furan-vinylene-phenyl, the Φfl of which was <10% when in the solid state. The cyanovinylene counterparts emitted weakly in solution (Φfl < 2%). Their luminogenic property was demonstrated with a ca. 15-fold increase in emission in the solid state. A 6-fold emission enhancement was also found when they were aggregated in a 90 vol% methanol/water mixture. The solid-state emission enhancement of the cyanovinylene benzofurans was in part attributable to intermolecular contacts that suppressed excited-state deactivation by molecular motion.
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Affiliation(s)
- Jérémie Grolleau
- Université d'Angers, MOLTECH-Anjou, UMR CNRS 6200, 2 bd Lavoisier, 49045 Angers, France
| | - Ravil Petrov
- Université d'Angers, MOLTECH-Anjou, UMR CNRS 6200, 2 bd Lavoisier, 49045 Angers, France
| | - Magali Allain
- Université d'Angers, MOLTECH-Anjou, UMR CNRS 6200, 2 bd Lavoisier, 49045 Angers, France
| | - William G Skene
- Laboratoire de caractérisation photophysique des matériaux conjugués, Département de chimie, pavillon JA Bombardier, Université de Montréal, CP 6128, succ. Centre-ville, Montréal, Québec H3T 2B1, Canada
| | - Pierre Frère
- Université d'Angers, MOLTECH-Anjou, UMR CNRS 6200, 2 bd Lavoisier, 49045 Angers, France
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17
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Kurowska A, Zassowski P, Kostyuchenko AS, Zheleznova TY, Andryukhova KV, Fisyuk AS, Pron A, Domagala W. Effect of donor to acceptor ratio on electrochemical and spectroscopic properties of oligoalkylthiophene 1,3,4-oxadiazole derivatives. Phys Chem Chem Phys 2018; 19:30261-30276. [PMID: 29110005 DOI: 10.1039/c7cp05155g] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A structure-property study across a series of donor-acceptor-donor structures composed of mono- and bi-(1,3,4-oxadiazole) units symmetrically substituted with alkyl functionalized bi-, ter- and quaterthiophene segments is presented. Synthetically tailoring the ratio of electron-withdrawing 1,3,4-oxadiazole to electron-releasing thiophene units and their alkyl grafting pattern permitted us to scrutinize the impact of these structural factors on the redox, absorptive and emissive properties of these push-pull molecules. Contrasting trends of redox potentials were observed, with the oxidation potential closely following the donor-to-acceptor ratio, whereas the reduction potential being tuned independently by either the number of acceptor units or the conjugation length of the donor-acceptor system. Increasing the thiophene unit contribution delivered a shift from blue to green luminescence, while the structural rigidity afforded by intramolecular non-covalent interactions between 1,3,4-oxadiazole and the thiophene moieties has been identified as the prime factor determining the emission efficiency of these molecules. All six structures investigated electro-polymerize easily, yielding electroactive and electrochromic polymers. The polymer doping process is largely influenced by the length of the oligothiophene repeating unit and the alkyl chain grafting density. Polymers with relatively short oligothiophene segments are able to support polarons and polaron-pairs, whereas those with segments longer than six thiophene units could also stabilize diamagnetic charge carries - bipolarons. Increasing the alkyl chain grafting density improved the reversibility and broadened the working potential window of the p-doping process. Stable radical anions have also been investigated, bringing detailed information about the conjugation pattern of these electron-surplus species. This study delivers interesting clues towards the conscious structural design of bespoke frontier energy level oligothiophene functional materials and their polymers by incorporating a structurally matching 1,3,4-oxadiazole unit.
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Affiliation(s)
- Aleksandra Kurowska
- Faculty of Chemistry, Silesian University of Technology, Marcina Strzody 9, 44-100 Gliwice, Poland.
| | - Pawel Zassowski
- Faculty of Chemistry, Silesian University of Technology, Marcina Strzody 9, 44-100 Gliwice, Poland.
| | - Anastasia S Kostyuchenko
- Laboratory of New Organic Materials, Omsk State Technical University, Mira ave. 11, Omsk 644050, Russian Federation and RUDN University, 6 Miklukho-Maklaya st, Moscow 117198, Russian Federation
| | - Tatyana Yu Zheleznova
- Laboratory of New Organic Materials, Omsk State Technical University, Mira ave. 11, Omsk 644050, Russian Federation
| | - Kseniya V Andryukhova
- Department of Organic Chemistry, Omsk F. M. Dostoevsky State University, Mira ave. 55A, Omsk 644077, Russian Federation
| | - Alexander S Fisyuk
- Laboratory of New Organic Materials, Omsk State Technical University, Mira ave. 11, Omsk 644050, Russian Federation and Department of Organic Chemistry, Omsk F. M. Dostoevsky State University, Mira ave. 55A, Omsk 644077, Russian Federation
| | - Adam Pron
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Wojciech Domagala
- Faculty of Chemistry, Silesian University of Technology, Marcina Strzody 9, 44-100 Gliwice, Poland.
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18
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Regulation of metal–metal interactions and chromic phenomena of multi-decker platinum complexes having π-systems. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.07.016] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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19
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Lei BH, Yang Z, Pan S. Enhancing optical anisotropy of crystals by optimizing bonding electron distribution in anionic groups. Chem Commun (Camb) 2017; 53:2818-2821. [DOI: 10.1039/c6cc09986f] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Contrivable deep-UV coherent light from an originally non-phase-matchable crystal was achieved by optimizing bonding electron distribution in anionic groups.
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Affiliation(s)
- Bing-Hua Lei
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences; Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
| | - Zhihua Yang
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences; Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
| | - Shilie Pan
- Key Laboratory of Functional Materials and Devices for Special Environments
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences; Xinjiang Key Laboratory of Electronic Information Materials and Devices
- Urumqi 830011
- China
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20
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Xu T, Li W, Gao X, Sun C, Chen G, Zhang X, Li C, Zhu W, Wei B. Temperature and Exciton Concentration Induced Excimer Emission of 4,4'-Bis(4''-Triphenylsilyl) Phenyl-1,1'-Binaphthalene and Application for Sunlight-Like White Organic Light-Emitting Diodes. NANOSCALE RESEARCH LETTERS 2016; 11:379. [PMID: 27562015 PMCID: PMC4999381 DOI: 10.1186/s11671-016-1578-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 08/12/2016] [Indexed: 06/06/2023]
Abstract
This paper demonstrates the influence of temperature, exciton concentration, and electron transportation layers on the excimer emission of a novel deep-blue material: 4,4'-bis(4''-triphenylsilyl) phenyl-1,1'-binaphthalene (SiBN), by studying the photoluminescence and electroluminescence spectra of SiBN-based film. We have further developed sunlight-like and warm-light white organic light-emitting diodes (WOLEDs) with high efficiency and wide-range spectra, using SiBN and bis(2-phenylbenzothiozolato-N,C2')iridium(acetylacetonate) (bt2Ir(acac)) as the blue excimer and yellow materials, respectively. The resulting device exhibited an excellent spectra overlap ratio of 82.9 % with sunlight, while the device peak current efficiency, external quantum efficiency, and power efficiency were 18.5 cd/A, 6.34 %, and 11.68 lm/W, respectively, for sunlight-like WOLEDs.
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Affiliation(s)
- Tao Xu
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072 People’s Republic of China
- Sino-European School of Technology, Shanghai University, 99 Shangda Road, Shanghai, 200444 People’s Republic of China
| | - Weiling Li
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072 People’s Republic of China
| | - Xicun Gao
- School of Petroleum and chemical engineering, Qinzhou University, 12 coastal Avenue, Qinzhou, 535000 People’s Republic of China
| | - Chang Sun
- Department of Electrical Engineering, Iowa State University, 4565 Union Dr, Ames, IA 50011 USA
| | - Guo Chen
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072 People’s Republic of China
| | - Xiaowen Zhang
- School of Mechanical & Electrical Engineering, Guilin University of Electronic Technology, 1 Jinji Road, Guilin, 541004 People’s Republic of China
| | - Chunya Li
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072 People’s Republic of China
| | - Wenqing Zhu
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072 People’s Republic of China
| | - Bin Wei
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072 People’s Republic of China
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21
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Kerner L, Gmucová K, Kožíšek J, Petříček V, Putala M. Easily oxidizable triarylamine materials with naphthalene and binaphthalene core: structure–properties relationship. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Yamaguchi K, Murai T, Guo J, Sasamori T, Tokitoh N. Acid-Responsive Absorption and Emission of 5- N-Arylaminothiazoles: Emission of White Light from a Single Fluorescent Dye and a Lewis Acid. ChemistryOpen 2016; 5:434-438. [PMID: 27777834 PMCID: PMC5062007 DOI: 10.1002/open.201600059] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Indexed: 11/15/2022] Open
Abstract
Solutions of 5-N-arylaminothiazoles containing pyridyl groups exhibited clear halochromism and halofluorism upon addition of Brønsted and Lewis acids. The addition of triflic acid to solutions of 5-N-arylaminothiazoles in Et2O induced bathochromic shifts of the absorption and emission bands. DFT calculations suggested that the spectral changes arise from the protonation of the pyridyl group of the thiazoles in Et2O. Single-crystal X-ray diffraction analysis of a thiazole and its protonated form revealed the change of the conformation around the thiazole ring. The emission of white light was accomplished from a single fluorescent dye by adjusting the ratio of dye and B(C6F5)3, whereby the International Commission on Illumination coordinates showed a linear change from blue to orange.
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Affiliation(s)
- Kirara Yamaguchi
- Department of Chemistry and Biomolecular ScienceFaculty of EngineeringGifu University, YanagidoGifu501-1193Japan
| | - Toshiaki Murai
- Department of Chemistry and Biomolecular ScienceFaculty of EngineeringGifu University, YanagidoGifu501-1193Japan
| | - Jing‐Dong Guo
- Institute for Chemical ResearchKyoto University, Gokasho UjiKyoto611-0011Japan
| | - Takahiro Sasamori
- Institute for Chemical ResearchKyoto University, Gokasho UjiKyoto611-0011Japan
| | - Norihiro Tokitoh
- Institute for Chemical ResearchKyoto University, Gokasho UjiKyoto611-0011Japan
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23
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Mozaffari M, Amiri S, Jafarzadeh M, Fallah HR, Shatooti S. Application of CdSe-PVK Nanocomposite as a Hole Transport Layer for OLEDs. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Morteza Mozaffari
- Department of Physics, Faculty of Science; University of Isfahan; Isfahan 81746-73441 Iran
| | - Shima Amiri
- Department of Physics, Faculty of Science; Razi University; Kermanshah 67149-67346 Iran
| | | | - Hamid Reza Fallah
- Department of Physics, Faculty of Science; University of Isfahan; Isfahan 81746-73441 Iran
| | - Sara Shatooti
- Department of Physics, Faculty of Science; Razi University; Kermanshah 67149-67346 Iran
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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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25
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Romero-Servin S, Lozano-Hernández LA, Maldonado JL, Carriles R, Ramos-Ortíz G, Pérez-Gutiérrez E, Scherf U, Zolotukhin MG. Light Emission Properties of a Cross-Conjugated Fluorene Polymer: Demonstration of Its Use in Electro-Luminescence and Lasing Devices. Polymers (Basel) 2016; 8:polym8020043. [PMID: 30979138 PMCID: PMC6432540 DOI: 10.3390/polym8020043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 01/29/2016] [Accepted: 02/01/2016] [Indexed: 11/16/2022] Open
Abstract
Light emission properties of a fluorene cross-conjugated polymer (PF–1) based on the monomer 4,7-bis[2-(9,9-dimethyl)fluorenyl] benzo[1,2,5]thiadiazole are reported. This polymer exhibits solubility at high concentrations, good processability into thin solid films of good quality and a broad emission band with a fluorescence quantum yield of approximately 1. Based on these features, in this paper we implemented the use of PF–1 as an active layer in polymer light-emitting diodes (PLEDs) and as a laser gain medium in solution. To get insight on the conducting properties of PF–1, two different electron injectors, poly [(9,9-bis(3′-(N,N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9–dioctylfluorene)] (PFN) and lithium fluoride (LiF), were used in a simple PLED architecture. PLEDs with the PFN film were found to exhibit better performance with a maximum luminous efficiency of 40 cd/A, a turn-on voltage (Von) of approximately 4.5 V and a luminance maximum of 878 cd/m2 at 5.5 V, with a current density of 20 A/m2. For the lasing properties of PF–1, we found a lasing threshold of around 75 μJ and a tunability of 20 nm. These values are comparable with those of rhodamine 6G, a well-known laser dye.
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Affiliation(s)
| | | | - José-Luis Maldonado
- Centro de Investigaciones en Óptica A. P. 1-948, 37150 León Guanajuato, Mexico.
| | - Ramón Carriles
- Centro de Investigaciones en Óptica A. P. 1-948, 37150 León Guanajuato, Mexico.
| | - Gabriel Ramos-Ortíz
- Centro de Investigaciones en Óptica A. P. 1-948, 37150 León Guanajuato, Mexico.
| | | | - Ullrich Scherf
- Macromolecular Chemistry Group, Wuppertal University, Gauss-Str. 20, D-42097 Wuppertal, Germany.
| | - Mikhail G Zolotukhin
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A. P. 70-360, 04510 México D. F., Mexico.
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26
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Organic Light-Emitting Diodes (OLEDs): Working Principles and Device Technology. LECTURE NOTES IN CHEMISTRY 2016. [DOI: 10.1007/978-3-319-31671-0_3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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27
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Zhao S, Xie Y, Liang J, Guo T, Ying L, Wu H, Yang W, Peng J, Cao Y. Solution-processable bipolar S,S-dioxide-dibenzothiophene chromophores for single-layer organic light-emitting diodes. NEW J CHEM 2016. [DOI: 10.1039/c6nj00843g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Four novel solution processable small molecular chromophores that consist of regioisomeric S,S-dioxide-dibenzothiophene units are designed and synthesized.
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Affiliation(s)
- Sen Zhao
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Yuan Xie
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Junfei Liang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Ting Guo
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Lei Ying
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Hongbin Wu
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Wei Yang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Junbiao Peng
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Yong Cao
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
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28
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Greulich TW, Suzuki N, Daniliuc CG, Fukazawa A, Yamaguchi E, Studer A, Yamaguchi S. A biphenyl containing two electron-donating and two electron-accepting moieties: a rigid and small donor–acceptor–donor ladder system. Chem Commun (Camb) 2016; 52:2374-7. [DOI: 10.1039/c5cc03063c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A small ladder-type donor–acceptor–donor π-system, a biphenyl furnishing two phosphine oxide bridges and two amino groups, showed significantly red-shifted absorption and fluorescence.
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Affiliation(s)
| | - Naoya Suzuki
- Department of Chemistry
- Graduate School of Science and Institute of Transformative Bio-Molecules (WPI-ITbM)
- Nagoya University
- Chikusa
- Japan
| | | | - Aiko Fukazawa
- Department of Chemistry
- Graduate School of Science and Institute of Transformative Bio-Molecules (WPI-ITbM)
- Nagoya University
- Chikusa
- Japan
| | - Eriko Yamaguchi
- Department of Chemistry
- Graduate School of Science and Institute of Transformative Bio-Molecules (WPI-ITbM)
- Nagoya University
- Chikusa
- Japan
| | - Armido Studer
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Shigehiro Yamaguchi
- Department of Chemistry
- Graduate School of Science and Institute of Transformative Bio-Molecules (WPI-ITbM)
- Nagoya University
- Chikusa
- Japan
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29
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Tronnier A, Wagenblast G, Münster I, Strassner T. Phosphorescent Platinum(II) Complexes with C^C* Cyclometalated NHC Dibenzofuranyl Ligands: Impact of Different Binding Modes on the Decay Time of the Excited State. Chemistry 2015. [DOI: 10.1002/chem.201502087] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Volpi R, Stafström S, Linares M. Transition fields in organic materials: From percolation to inverted Marcus regime. A consistent Monte Carlo simulation in disordered PPV. J Chem Phys 2015; 142:094503. [DOI: 10.1063/1.4913733] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Riccardo Volpi
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
| | - Sven Stafström
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
| | - Mathieu Linares
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
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31
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Tyagi P, Tuli S, Srivastava R. Study of fluorescence quenching due to 2, 3, 5, 6-tetrafluoro-7, 7′, 8, 8′-tetracyano quinodimethane and its solid state diffusion analysis using photoluminescence spectroscopy. J Chem Phys 2015; 142:054707. [DOI: 10.1063/1.4907274] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Pla P, Junquera-Hernández JM, Bolink HJ, Ortí E. Emission energy of azole-based ionic iridium(iii) complexes: a theoretical study. Dalton Trans 2015; 44:8497-505. [DOI: 10.1039/c4dt03046j] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Tuning the emission color of azole-based iridium(iii) complexes by changing the number and position of nitrogen atoms in the azole ring.
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Affiliation(s)
- Paula Pla
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980 Paterna
- Spain
| | | | - Henk J. Bolink
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980 Paterna
- Spain
| | - Enrique Ortí
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980 Paterna
- Spain
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33
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Baschieri A, Muzzioli S, Matteucci E, Stagni S, Massi M, Sambri L. New heterometallic Ir(iii)2–Eu(iii) complexes: white light emission from a single molecule. Dalton Trans 2015; 44:37-40. [DOI: 10.1039/c4dt01910e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Pure white light emission from a single-molecule Ir2(iii)–Eu(iii) complex can be achieved with appropriate ligands.
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Affiliation(s)
- Andrea Baschieri
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Sara Muzzioli
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Elia Matteucci
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Stefano Stagni
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Massimiliano Massi
- Nanochemistry Research Institute
- Department of Chemistry
- Curtin University
- Western Australia
- Australia
| | - Letizia Sambri
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
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34
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Cid JJ, Mohanraj J, Mohankumar M, Holler M, Monti F, Accorsi G, Karmazin-Brelot L, Nierengarten I, Malicka J, Cocchi M, Delavaux-Nicot B, Armaroli N, Nierengarten JF. Dinuclear Cu(I) complexes prepared from 2-diphenylphosphino-6-methylpyridine. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.06.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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35
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Monti F, Baschieri A, Gualandi I, Serrano-Pérez JJ, Junquera-Hernández JM, Tonelli D, Mazzanti A, Muzzioli S, Stagni S, Roldan-Carmona C, Pertegás A, Bolink HJ, Ortí E, Sambri L, Armaroli N. Iridium(III) Complexes with Phenyl-tetrazoles as Cyclometalating Ligands. Inorg Chem 2014; 53:7709-21. [DOI: 10.1021/ic500999k] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Filippo Monti
- Istituto
per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale
delle Ricerche, Via P.
Gobetti, 101, I-40129, Bologna, Italy
| | - Andrea Baschieri
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Isacco Gualandi
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Juan J. Serrano-Pérez
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, E-46980, Paterna, Spain
| | - José M. Junquera-Hernández
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, E-46980, Paterna, Spain
| | - Domenica Tonelli
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Andrea Mazzanti
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Sara Muzzioli
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Stefano Stagni
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Cristina Roldan-Carmona
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, E-46980, Paterna, Spain
| | - Antonio Pertegás
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, E-46980, Paterna, Spain
| | - Henk J. Bolink
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, E-46980, Paterna, Spain
| | - Enrique Ortí
- Instituto
de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán
2, E-46980, Paterna, Spain
| | - Letizia Sambri
- Dipartimento
di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, I-40136, Bologna, Italy
| | - Nicola Armaroli
- Istituto
per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale
delle Ricerche, Via P.
Gobetti, 101, I-40129, Bologna, Italy
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