1
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Oyama H, Nishimura Y. Substituent effects of halogens on the excited-state intermolecular proton transfer reactions. Photochem Photobiol Sci 2024; 23:1341-1352. [PMID: 38850493 DOI: 10.1007/s43630-024-00598-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 05/27/2024] [Indexed: 06/10/2024]
Abstract
Fluorescent aromatic urea compounds undergo excited-state intermolecular proton transfer (ESPT) in the presence of acetate anions to produce an excited state of the tautomer (T*) from the excited state of the complex (N*), resulting in dual fluorescence. Herein, we performed spectroscopic measurements of anthracen-1-yl-3-phenylurea derivatives with substituents, -CF3, -F, or -Cl, at the p-position of the phenyl group in the presence of acetate to investigate the substituent effects on the ESPT reaction and the deactivation processes of N* and T*. Kinetic analysis showed that the reverse ESPT rate constant (k-PT) depended on the respective substituents, suggesting that each substituent may influence the reverse ESPT process differently. In particular, since the electron-withdrawing properties of -F are estimated by the - I and + Iπ effects, it is plausible that -F has a slight electron-donating property and influences the reverse process from T* to N* in the excited state. This study shows that it is possible to control emission by selecting specific substituents in the ESPT system.
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Affiliation(s)
- Hiroki Oyama
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8571, Japan
| | - Yoshinobu Nishimura
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8571, Japan.
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2
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Szapoczka WK, Truskewycz AL, Skodvin T, Holst B, Thomas PJ. Fluorescence intensity and fluorescence lifetime measurements of various carbon dots as a function of pH. Sci Rep 2023; 13:10660. [PMID: 37391469 DOI: 10.1038/s41598-023-37578-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 06/23/2023] [Indexed: 07/02/2023] Open
Abstract
Measurement and monitoring of pH are essential in both the industry and academia. It is therefore important to continue developing novel, low-cost pH sensors that provide increased accuracy over long periods of time. Particularly promising are sensors based on materials that show pH-dependent fluorescence intensity (FI) and lifetime (FL). Carbon dots (CDs) are emerging as promising candidates because of their low cost, ease of manufacturing, low toxicity, and negligible photobleaching. However, little has been done to quantify the FI and FL values of CDs. Here we report the characterisation of the pH-dependent FI and FL of four novel solvothermal synthesised CDs. The fifth CD is used as a reference sample and was synthesised following a published synthesis. The precursors for the CDs include disperse blue 1 dye, phloroglucinol, m-phenylenediamine (m-PD), N, and N-dimethylformamide (DMF). The average diameter size of the CDs ranges from 1.5 to 15 nm. An excitation wavelength of 452 nm with a bandwidth of 45 nm was used to quantify the fluorescence in the pH range 5-9. Three CDs show a decreasing trend in FI with pH, while two CDs show an increasing trend. None of the CDs shows strong FL dependence. The FL changes around 0.5 ± 0.2 ns across the tested pH range. We suggest that the differences in the fluorescence trends can be attributed to the precursors chosen for synthesising the CDs.
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Affiliation(s)
- Wiktoria K Szapoczka
- Department of Physics and Technology, University of Bergen, 5007, Bergen, Norway.
| | - Adam L Truskewycz
- Department of Biomedicine, University of Bergen, 5009, Bergen, Norway
| | - Tore Skodvin
- Department of Chemistry, University of Bergen, 5007, Bergen, Norway
| | - Bodil Holst
- Department of Physics and Technology, University of Bergen, 5007, Bergen, Norway
| | - Peter J Thomas
- NORCE Norwegian Research Centre AS, 5008, Bergen, Norway
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3
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Ghorai A, Banerjee S. Phosphorus-Containing Aromatic Polymers: Synthesis, Structure, Properties and Membrane-Based Applications. Prog Polym Sci 2023. [DOI: 10.1016/j.progpolymsci.2023.101646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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4
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Barman D, Annadhasan M, Chandrasekar R, Iyer PK. Hot-exciton harvesting via through-space single-molecule based white-light emission and optical waveguides. Chem Sci 2022; 13:9004-9015. [PMID: 36091201 PMCID: PMC9365089 DOI: 10.1039/d2sc02172b] [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: 04/16/2022] [Accepted: 07/02/2022] [Indexed: 11/21/2022] Open
Abstract
Through-space donor–alkyl bridge–acceptor (D–σ–A) luminogens are developed as new organic single-molecule white light emitters (OSMWLEs) involving multiple higher lying singlet (Sn) and triplet (Tm) states (hot-excitons). Experimental and theoretical results confirm the origin of white light emission due to the co-existence of prompt fluorescence from locally excited states, thermally activated delayed fluorescence (TADF), and fast/slow dual phosphorescence color mixing simultaneously. Notably, the fast phosphorescence was observed due to trace amounts of isomeric impurities from commercial carbazole, while H-/J-aggregation resulted in slow phosphorescence. Crystal structure-packing-property analysis revealed that the alkyl chain length induced supramolecular self-assembly greatly influenced the solid-state optical properties. Remarkably, the 1D-microrod crystals of OSMWLEs demonstrated the first examples of triplet harvesting waveguides by self-guiding the generated phosphorescence through light propagation along their longitudinal axis. This work thus highlights an uncommon design strategy to achieve multi-functional OSMWLEs with in-depth mechanistic insights and optical waveguiding applications making them a potentially new class of white emissive materials. Through-space donor–alkyl bridge–acceptor multifunctional organic single molecules that simultaneously displayed white light emission, thermally activated delayed fluorescence, room temperature dual phosphorescence and optical wave-guiding properties.![]()
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Affiliation(s)
- Debasish Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
| | - Mari Annadhasan
- School of Chemistry and Centre for Nanotechnology, University of Hyderabad, Gachibowli, Prof. C. R. Rao Road, Hyderabad-500046, India
| | - Rajadurai Chandrasekar
- School of Chemistry and Centre for Nanotechnology, University of Hyderabad, Gachibowli, Prof. C. R. Rao Road, Hyderabad-500046, India
| | - Parameswar Krishnan Iyer
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
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5
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Lv A, Chen Q, Zhao C, Li S, Sun S, Dong J, Li Z, Lin H. Long-wavelength (red to near-infrared) emissive carbon dots: Key factors for synthesis, fluorescence mechanism, and applications in biosensing and cancer theranostics. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.06.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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6
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Wang H, Xiao Y, Xie Z, Sun H, Zhang X, Wang J, Huang R. 2-Hydroxybenzophenone Derivatives: ESIPT Fluorophores Based on Switchable Intramolecular Hydrogen Bonds and Excitation Energy-Dependent Emission. Front Chem 2021; 9:766179. [PMID: 34738006 PMCID: PMC8560898 DOI: 10.3389/fchem.2021.766179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 09/13/2021] [Indexed: 11/13/2022] Open
Abstract
In this work, a new series of 2-hydroxybenzophenone (BPOH) derivatives, BPOH-TPA, BPOH-PhCz, and BPOH-SF substituting with different electron-donating groups are designed and synthesized. Dual-emission spectra are observed in solutions indicating their excited-state intramolecular proton transfer (ESIPT) character. In solid states, all compounds exhibit a broad emission spectrum when excited at low excitation energy, deriving from the enol-type form stabilized by intramolecular hydrogen bonds. Compound BPOH-TPA shows a clear excitation wavelength dependence. However, such behavior is absent in BPOH-PhCz and BPOH-SF, as the rigid and weaker donor moieties may restrict this process. Furthermore, by increasing the excitation energy, dual emission with a high-energy band ranging from 550 to 582 nm and a low-energy band ranging from 625 to 638 nm is obtained in all three molecules. The photophysical studies and single-crystal analyses are performed to further illustrate the excitation-dependent emission. Higher excitation energies can promote more excitons to keto forms via ESIPT, giving a stronger redshifted emission. BPOH-TPA with a stronger donor strength exhibits an obvious color change gradually from yellow to orange-red with the increasing excitation power from 1 to 15 mW/cm2. This study provides a novel example of ESIPT materials with tunable emission colors.
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Affiliation(s)
- Hailan Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), Xi'an, China
| | - Yuxin Xiao
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), Xi'an, China
| | - Zongliang Xie
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), Xi'an, China
| | - Haodong Sun
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), Xi'an, China
| | - Xiayu Zhang
- School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou, China
| | - Juan Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), Xi'an, China
| | - Rongjuan Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), Xi'an, China
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7
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Ito W, Hattori S, Kondo M, Sakagami H, Kobayashi O, Ishimoto T, Shinozaki K. Dual emission from an iridium(III) complex/counter anion ion pair. Dalton Trans 2021; 50:1887-1894. [PMID: 33475646 DOI: 10.1039/d1dt00021g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
[Ir(tpy)2](PF6)3 (tpy = 2,2':6',2''-terpyridine) dissolved in CH3CN was found to exhibit dual color luminescent emission depending on the excitation wavelength. Specifically, blue and green emissions were obtained with excitation at 350 and 410 nm, respectively. Because the associated emission spectra were consistent with those of [Ir(tpy)2]Cl3 in water and [Ir(tpy)2](PF6)3 in the crystalline state, respectively, this dual emission is attributed to emissions from the [Ir(tpy)2]3+ cation and its ion pair [Ir(tpy)2]3+·PF6-. The emission is assigned to the 3π-π* transition of the ligands based on time-dependent density functional theory (TD-DFT) calculations. Conversely, [Ir(tpy)2]I3 in CH3CN shows emission due to [Ir(tpy)2]3+ but not [Ir(tpy)2]3+·I-, while crystalline [Ir(tpy)2]I3 emits red luminescence at 77 K that is inconsistent with that from [Ir(tpy)2]3+. Since the emission energies of crystalline [Ir(tpy)2]X3 (X- = Cl-, Br- or I-) show a good correlation with the electron affinity of X, the emissions are assigned to a counter anion to complex ion charge-transfer transition. This hypothesis is supported by TD-DFT calculations regarding [Ir(tpy)2]3+·X-.
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Affiliation(s)
- Wataru Ito
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
| | - Shingo Hattori
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
| | - Mio Kondo
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
| | - Hiroki Sakagami
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
| | - Osamu Kobayashi
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
| | - Takayoshi Ishimoto
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
| | - Kazuteru Shinozaki
- Department of Materials Science, Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
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8
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Barman D, Gogoi R, Narang K, Iyer PK. Recent Developments on Multi-Functional Metal-Free Mechanochromic Luminescence and Thermally Activated Delayed Fluorescence Organic Materials. Front Chem 2020; 8:483. [PMID: 32695743 PMCID: PMC7338664 DOI: 10.3389/fchem.2020.00483] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/11/2020] [Indexed: 12/12/2022] Open
Abstract
Metal-free organic compounds with highly ordered π-conjugated twisted skeletons are capable of generating brilliant multi-colored light. Additionally, the co-existence of numerous other multi-functional properties have endowed them with the potential to be a promising class of materials for several electronic and photonic applications and next-generation advanced luminescent material-based devices. This review highlights the recent developments made in this fascinating class of multi-property encompassing materials, involving a highly twisted donor-acceptor based single molecular platform with synchronized photophysical behavior such as thermally activated delayed fluorescence (TADF), mechanoresponsive (MR), room-temperature phosphorescence (RTP), and aggregation induced emission (AIE) with associated unique and inherently manifested structure-property relationship investigations. Furthermore, a brief summary of the optoelectronic behavior of TADF materials are also presented by correlating their performances in the organic light-emitting diodes (OLEDs) and corresponding EL devices. In addition to mechanochromic luminescence (MCL) with TADF behavior, new types of emitters are also being developed, with tunable color changes such as blue-green, yellow-orange, yellow-red, etc., with some emitters crossing the entire visible span to produce white OLEDs. These developments have enriched the library of fascinating organic materials in addition to providing new directions of multifunctional material design for solutions processed OLED and several other advanced devices.
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Affiliation(s)
- Debasish Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India
| | - Rajdikshit Gogoi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India
| | - Kavita Narang
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India
| | - Parameswar Krishnan Iyer
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India.,Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, India
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9
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Yang Y, Yang L, Li X, Zhao L, Wang S, Ding J, Wang L. Trap-Controlled White Electroluminescence From a Single Red-Emitting Thermally Activated Delayed Fluorescence Polymer. Front Chem 2020; 8:287. [PMID: 32373586 PMCID: PMC7186499 DOI: 10.3389/fchem.2020.00287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/23/2020] [Indexed: 11/13/2022] Open
Abstract
Single white-emitting polymers have been reported by incorporating the second-generation carbazole dendron into the side chain of a red-emitting thermally activated delayed fluorescence (TADF) polymer. Due to the prevented hole trap effect, in this case, excitons can be generated simultaneously on the polymeric host and the red TADF dopant to give a dual emission. Consequently, a bright white electroluminescence is achieved even at a dopant loading as high as 5 mol.%, revealing a maximum luminous efficiency of 16.1 cd/A (12.0 lm/W, 8.2%) and Commission Internationale de l'Eclairage (CIE) coordinates of (0.42, 0.32). The results clearly indicate that the delicate tuning of charge trap is a promising strategy to develop efficient single white-emitting polymers, whose low-band-gap chromophore content can be up to a centesimal level.
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Affiliation(s)
- Yun Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Liuqing Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Xuefei Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Lei Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Shumeng Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Junqiao Ding
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
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10
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Jiang L, Ding H, Xu M, Hu X, Li S, Zhang M, Zhang Q, Wang Q, Lu S, Tian Y, Bi H. UV-Vis-NIR Full-Range Responsive Carbon Dots with Large Multiphoton Absorption Cross Sections and Deep-Red Fluorescence at Nucleoli and In Vivo. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000680. [PMID: 32285624 DOI: 10.1002/smll.202000680] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/08/2020] [Accepted: 03/10/2020] [Indexed: 05/14/2023]
Abstract
Carbon dots (CDs), with excellent optical property and cytocompatibility, are an ideal class of nanomaterials applied in the field of biomedicine. However, the weak response of CDs in the near-infrared (NIR) region impedes their practical applications. Here, UV-vis-NIR full-range responsive fluorine and nitrogen doped CDs (N-CDs-F) are designed and synthesized that own a favorable donor-π-acceptor (D-π-A) configuration and exhibit excellent two-photon (λex = 1060 nm), three-photon (λex = 1600 nm), and four-photon (λex = 2000 nm) excitation upconversion fluorescence. D-π-A-conjugated CDs prepared by solvothermal synthesis under the assistance of ammonia fluoride are reported and are endowed with larger multiphoton absorption (MPA) cross sections (3PA: 9.55 × 10-80 cm6 s2 photon-2 , 4PA: 6.32 × 10-80 cm8 s3 photon-3 ) than conventional organic compounds. Furthermore, the N-CDs-F show bright deep-red to NIR fluorescence both in vitro and in vivo, and can even stain the nucleoli of tumor cells. A plausible mechanism is proposed on the basis of the strong inter-dot and intra-dot hydrogen bonds through NH···F that can facilitate the expanding of conjugated sp2 domains, and thus not only result in lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy level but also larger MPA cross sections than those of undoped CDs.
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Affiliation(s)
- Lei Jiang
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Haizhen Ding
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Mingsheng Xu
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Xiaolong Hu
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Shengli Li
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Mingzhu Zhang
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Qiong Zhang
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Qiyang Wang
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Siyu Lu
- College of Chemistry, Zhengzhou University, 100 Kexue Road, Zhengzhou, 450001, China
| | - Yupeng Tian
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Hong Bi
- School of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, China
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, 111 Jiulong Road, Hefei, 230601, China
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11
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Zhang X, Cao Y, Song J, Li K, Jiang Q, Yuan A, Shi C. A New Facial Homoleptic Tris‐cyclometalated Iridium(III) Complex with Oxygen‐bridged Triarylamine Units. ChemistrySelect 2020. [DOI: 10.1002/slct.202000681] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xinghua Zhang
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
| | - Yibo Cao
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
| | - Jialiang Song
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
| | - Kang Li
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
| | - Qibin Jiang
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
| | - Chao Shi
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology Zhenjiang 212003, P. R. China
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12
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Li B, Li Z, Guo F, Song J, Jiang X, Wang Y, Gao S, Wang J, Pang X, Zhao L, Zhang Y. Realizing Efficient Single Organic Molecular White Light-Emitting Diodes from Conformational Isomerization of Quinazoline-Based Emitters. ACS APPLIED MATERIALS & INTERFACES 2020; 12:14233-14243. [PMID: 32103662 DOI: 10.1021/acsami.9b20162] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Single pure organic molecular white light emitters (SPOMWLEs) are of significance as a new class of material for white lighting applications; however, few of them are able to emit white electroluminescence from organic light-emitting diodes. Herein, donor-π-acceptor conjugated emitters, 2PQ-PTZ and 4PQ-PTZ, were designed and synthesized as SPOMWLEs for white light emission considering the distinct advantages of their conformation isomers. The coexistence of conformational isomers in 2PQ-PTZ, which is the first experimental evidence of the coexisting quasi-axial and quasi-equatorial conformers, provides ideal flexibility to obtain white light emission from their simultaneous and well-separated fluorescence and thermally activated delayed fluorescence. With these remarkable properties, a 2PQ-PTZ-based white light-emitting diode (LED) with a CIE of (0.32, 0.34) and color rendering index (CRI) of 89 is demonstrated. Further, the white organic light-emitting diode (OLED) of 2PQ-PTZ exhibits a high external quantum efficiency (EQE) of 10.1%, which is the reported highest performance among SPOMWLE-based OLEDs.
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Affiliation(s)
- Bowen Li
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Zhiyi Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fengyun Guo
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jinsheng Song
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
| | - Xi Jiang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shiyong Gao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jinzhong Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Xinchang Pang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 45001, China
| | - Liancheng Zhao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yong Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 45001, China
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13
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Hamzehpoor E, Perepichka DF. Crystal Engineering of Room Temperature Phosphorescence in Organic Solids. Angew Chem Int Ed Engl 2019; 59:9977-9981. [PMID: 31725174 DOI: 10.1002/anie.201913393] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Ehsan Hamzehpoor
- Department of ChemistryMcGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Dmitrii F. Perepichka
- Department of ChemistryMcGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
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14
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Hamzehpoor E, Perepichka DF. Crystal Engineering of Room Temperature Phosphorescence in Organic Solids. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201913393] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ehsan Hamzehpoor
- Department of ChemistryMcGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Dmitrii F. Perepichka
- Department of ChemistryMcGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
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15
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Ma Z, Lü J, Dong W, Ding J, Wang L. Efficient Red Phosphorescent Polymers with Trap-Assisted Charge Balance: Molecular Design, Synthesis, and Electroluminescent Properties. ACS APPLIED MATERIALS & INTERFACES 2019; 11:18730-18738. [PMID: 31059224 DOI: 10.1021/acsami.9b03618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Three classes of red phosphorescent polymers (PF-H- x, PF-DPO- x, and PF-DPA- x, where x denotes the mole content of Ir complex) have been designed and synthesized, where the C∧N ligand of the tethered dopant bis(2,4-diphenylquinolyl)iridium(acetylacetonate) is substituted by hydrogen (H), diphenylphosphine oxide (DPO), and diphenylamine (DPA), respectively. It is found that the electron-withdrawing DPO group can lower the lowest unoccupied molecular orbital (LUMO) level of the phosphor, whereas the electron-donating DPA group leads to an upshifted highest occupied molecular orbital (HOMO) level of the phosphor. Following a sequence of PF-DPA- x, PF-H- x, and PF-DPO- x, the electron trap depth between dopant and host is gradually up from 0.43 to 1.01 eV, and the hole trap depth is correspondingly down from 0.74 to 0.46 eV. As a result, PF-DPO- x achieves the most balanced charge transport in the emitting layer among these polymers, revealing a record-high luminous efficiency (LE) of 10.3 cd/A and Commission Internationale de L'Eclairage (CIE) coordinates of (0.62, 0.33) on the basis of the simple single-layer device structure. Compared with PF-H- x (3.8 cd/A) and PF-DPA- x (1.2 cd/A) containing the same Ir content, the significantly improved performance indicates that trap-assisted charge balance is a promising strategy to optimize the device efficiency of red phosphorescent polymers.
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Affiliation(s)
- Zhihua Ma
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
- School of Materials Science and Engineering , Changchun University of Science and Technology , Changchun 130022 , P. R. China
| | - Jianhong Lü
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Wenyue Dong
- School of Materials Science and Engineering , Changchun University of Science and Technology , Changchun 130022 , P. R. China
| | - Junqiao Ding
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
- University of Science and Technology of China, Hefei 230026 , P. R. China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
- University of Science and Technology of China, Hefei 230026 , P. R. China
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16
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Paul L, Moitra T, Ruud K, Chakrabarti S. Strong Duschinsky Mixing Induced Breakdown of Kasha's Rule in an Organic Phosphor. J Phys Chem Lett 2019; 10:369-374. [PMID: 30620609 DOI: 10.1021/acs.jpclett.8b03624] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present the novel observation that Duschinsky mixings can lead to the breakdown of Kasha's rule in a white light phosphor molecule, dibenzo[ b, d]thiophen-2-yl (4-chlorophenyl)methanone. Our theoretical analyses show the energy gap between the T1 and T2 states (0.48 eV) is too large to allow for any significant population of the T2 state at room temperature and instead the faster intersystem crossing (ISC) between the S1 and T2 states is rather due to strong Duschinsky mixing, leading to the emission from the T2 state as well. A second-order cumulant-based method has been used for the calculation of the ISC rate, which suggests 2 orders of magnitude faster ISC rates for S1 → T2 compared to those for S1 → T1. We found that the carbonyl moiety of the S1 and T2 states of the molecule is significantly different with respect to bond angle and dihedral angles, engendering large displacements in selective normal modes, thus giving rise to strong Duschinsky mixing.
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Affiliation(s)
- Lopa Paul
- Department of Chemistry , University of Calcutta 92, A.P.C. Road , Kolkata 700 009 , India
| | - Torsha Moitra
- Department of Chemistry , Technical University of Denmark , Kemitorvet , 2800 Kgs. Lyngby , Denmark
| | - Kenneth Ruud
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry , University of Tromsø - The Arctic University of Norway , N-9037 Tromsø , Norway
| | - Swapan Chakrabarti
- Department of Chemistry , University of Calcutta 92, A.P.C. Road , Kolkata 700 009 , India
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17
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Zhou X, Huang M, Zeng X, Chen T, Xie G, Yin X, Yang C. Combining the qualities of carbazole and tetraphenyl silane in a desirable main chain for thermally activated delayed fluorescence polymers. Polym Chem 2019. [DOI: 10.1039/c9py00742c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A series of green TADF polymers with carbazole and a tetraphenyl silane copolymer main chain were developed for use in non-doped solution processed OLEDs.
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Affiliation(s)
- Xiang Zhou
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- PR China
| | - Manli Huang
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- PR China
| | - Xuan Zeng
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- PR China
| | - Tianheng Chen
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- PR China
| | - Guohua Xie
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- PR China
| | - Xiaojun Yin
- Shenzhen Key Laboratory of Polymer Science and Technology
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
| | - Chuluo Yang
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- PR China
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18
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Zhang B, Cheng Y. Recent Advances in Conjugated TADF Polymer Featuring in Backbone‐Donor/Pendant‐Acceptor Structure: Material and Device Perspectives. CHEM REC 2018; 19:1624-1643. [PMID: 30511821 DOI: 10.1002/tcr.201800152] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/07/2018] [Indexed: 01/11/2023]
Affiliation(s)
- Baohua Zhang
- Center for Advanced Analytical Science, c/o School of Chemistry and Chemical EngineeringGuangzhou University, Guangzhou 510006 P. R. China
| | - Yanxiang Cheng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 P. R. China
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19
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Luo M, Liang A, Liu D, Wang H, Wang Z, Chen Y, Cao T. White polymer light-emitting diodes based on dibenzo-24-crown-8 decorated orange-emitting iridium complexes. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Low dielectric constant silica-containing cross-linked organic-inorganic materials based on fluorinated poly(arylene ether)s. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Shao S, Wang S, Xu X, Yang Y, Lv J, Ding J, Wang L, Jing X, Wang F. Realization of high-power-efficiency white electroluminescence from a single polymer by energy-level engineering. Chem Sci 2018; 9:8656-8664. [PMID: 30627389 PMCID: PMC6289170 DOI: 10.1039/c8sc03753a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 09/18/2018] [Indexed: 11/22/2022] Open
Abstract
Single white light-emitting polymers with a record power efficiency of 52.1 lm W–1 are realized by energy-level engineering of poly(arylene phosphine oxide)-based phosphorescent polymers.
Single white light-emitting polymers (SWPs) represent a high-fidelity system for generating white light emission from polymers without phase separation compared to polymer blend systems. However, their device performance so far has been limited because of the unwanted hole scattering caused by an energy-level mismatch between emitters and hosts, and the large injection barrier at the polymer/anode interface. Here, we report novel poly(arylene phosphine oxide)-based all-phosphorescent SWPs by using the combination of a high-HOMO-level blue phosphor and high-HOMO-level poly(arylene phosphine oxide) host to achieve a low turn-on voltage of 2.8 V, high external quantum efficiency of 18.0% and remarkable power efficiency of 52.1 lm W–1, which makes them the most efficient SWPs so far. This record power efficiency is realized by using the high-HOMO-level blue phosphor to eliminate the hole scattering effect and by using the high-HOMO-level polymer host to reduce the hole injection barrier. This result represents an important progress in SWPs to achieve efficiency surpassing that of the polymer blends currently used for solution-processed white organic light-emitting diodes (WOLEDs) and even comparable with that of the small molecules used for vacuum-deposited WOLEDs.
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Affiliation(s)
- Shiyang Shao
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
| | - Shumeng Wang
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
| | - Xiushang Xu
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ; .,University of the Chinese Academy of Sciences , Beijing 100039 , P. R. China
| | - Yun Yang
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ; .,University of the Chinese Academy of Sciences , Beijing 100039 , P. R. China
| | - Jianhong Lv
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
| | - Junqiao Ding
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
| | - Xiabin Jing
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
| | - Fosong Wang
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . ;
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22
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Wang J, Gu X, Ma H, Peng Q, Huang X, Zheng X, Sung SHP, Shan G, Lam JWY, Shuai Z, Tang BZ. A facile strategy for realizing room temperature phosphorescence and single molecule white light emission. Nat Commun 2018; 9:2963. [PMID: 30054473 PMCID: PMC6063922 DOI: 10.1038/s41467-018-05298-y] [Citation(s) in RCA: 210] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 06/28/2018] [Indexed: 12/28/2022] Open
Abstract
Research on materials with pure organic room temperature phosphorescence (RTP) and their application as organic single-molecule white light emitters is a hot area and relies on the design of highly efficient pure organic RTP luminogens. Herein, a facile strategy of heavy-atom-participated anion-π+ interactions is proposed to construct RTP-active organic salt compounds (1,2,3,4-tetraphenyloxazoliums with different counterions). Those compounds with heavy-atom counterions (bromide and iodide ions) exhibit outstanding RTP due to the external heavy atom effect via anion-π+ interactions, evidently supported by the single-crystal X-ray diffraction analysis and theoretical calculation. Their single-molecule white light emission is realized by tuning the degree of crystallization. Such white light emission also performs well in polymer matrices and their use in 3D printing is demonstrated by white light lampshades.
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Affiliation(s)
- Jianguo Wang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou, 341000, China
| | - Xinggui Gu
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Huili Ma
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Qian Peng
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiaobo Huang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Xiaoyan Zheng
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Simon H P Sung
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Guogang Shan
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Jacky W Y Lam
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Zhigang Shuai
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Ben Zhong Tang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering, Research Center for Tissue Restoration and Reconstruction, Division of Life Science Institute of Advanced study, and Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
- NSFC Center for Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China.
- HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen, 518057, China.
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23
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Liu Q, Xie M, Chang X, Cao S, Zou C, Fu W, Che C, Chen Y, Lu W. Tunable Multicolor Phosphorescence of Crystalline Polymeric Complex Salts with Metallophilic Backbones. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803965] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qi Liu
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Beijing 100190 P. R. China
- Department of Chemistry South University of Science and Technology of China Shenzhen Guangdong 518055 P. R. China
| | - Mo Xie
- Department of Chemistry South University of Science and Technology of China Shenzhen Guangdong 518055 P. R. China
| | - Xiaoyong Chang
- Department of Chemistry South University of Science and Technology of China Shenzhen Guangdong 518055 P. R. China
| | - Shuang Cao
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Chao Zou
- Department of Chemistry South University of Science and Technology of China Shenzhen Guangdong 518055 P. R. China
| | - Wen‐Fu Fu
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Chi‐Ming Che
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
| | - Yong Chen
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Wei Lu
- Department of Chemistry South University of Science and Technology of China Shenzhen Guangdong 518055 P. R. China
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24
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Tunable Multicolor Phosphorescence of Crystalline Polymeric Complex Salts with Metallophilic Backbones. Angew Chem Int Ed Engl 2018; 57:6279-6283. [DOI: 10.1002/anie.201803965] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Indexed: 11/07/2022]
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25
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Usuki T, Shimada M, Yamanoi Y, Ohto T, Tada H, Kasai H, Nishibori E, Nishihara H. Aggregation-Induced Emission Enhancement from Disilane-Bridged Donor-Acceptor-Donor Luminogens Based on the Triarylamine Functionality. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12164-12172. [PMID: 29313675 DOI: 10.1021/acsami.7b14802] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Six novel donor-acceptor-donor organic dyes containing a Si-Si moiety based on triarylamine functionalities as donor units were prepared by Pd-catalyzed arylation of hydrosilanes. Their photophysical, electrochemical, and structural properties were studied in detail. Most of the compounds showed attractive photoluminescence (PL) and electrochemical properties both in solution and in the solid state because of intramolecular charge transfer (ICT), suggesting these compounds could be useful for electroluminescence (EL) applications. The aggregation-induced emission enhancement (AIEE) characteristics of 1 and 3 were examined in mixed water/THF solutions. The fluorescence intensity in THF/water was stronger in the solution with the highest ratio of water because of the suppression of molecular vibration and rotation in the aggregated state. Single-crystal X-ray diffraction of 4 showed that the reduction of intermolecular π-π interaction led to intense emission in the solid state and restricted intramolecular rotation of the donor and acceptor moieties, thereby indicating that the intense emission in the solid state is due to AIEE. An electroluminescence device employing 1 as an emitter exhibited an external quantum efficiency of up to 0.65% with green light emission. The emission comes solely from 1 because the EL spectrum is identical to that of the PL of 1. The observed luminescence was sufficiently bright for application in practical devices. Theoretical calculations and electrochemical measurements were carried out to aid in understanding the optical and electrochemical properties of these molecules.
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Affiliation(s)
- Tsukasa Usuki
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Masaki Shimada
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Tatsuhiko Ohto
- Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama, Toyonaka , Osaka 560-8531 , Japan
| | - Hirokazu Tada
- Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama, Toyonaka , Osaka 560-8531 , Japan
| | - Hidetaka Kasai
- Division of Physics, Faculty of Pure and Applied Sciences, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS) & Center for Integrated Research in Fundamental Science and Engineering (CiRfSE) , University of Tsukuba , 1-1-1 Tennodai, Tsukuba , Ibaraki 305-8571 , Japan
| | - Eiji Nishibori
- Division of Physics, Faculty of Pure and Applied Sciences, Tsukuba Research Center for Interdisciplinary Materials Science (TIMS) & Center for Integrated Research in Fundamental Science and Engineering (CiRfSE) , University of Tsukuba , 1-1-1 Tennodai, Tsukuba , Ibaraki 305-8571 , Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
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26
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Alapour S, Zamisa SJ, Silva JRA, Alves CN, Omondi B, Ramjugernath D, Koorbanally NA. Investigations into the flexibility of the 3D structure and rigid backbone of quinoline by fluorine addition to enhance its blue emission. CrystEngComm 2018. [DOI: 10.1039/c8ce00094h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Addition of fluorine to the quinoline structure was found to decrease its intermolecular interactions and influence its 3D structure.
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Affiliation(s)
- S. Alapour
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Durban
- South Africa
| | - S. J. Zamisa
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Durban
- South Africa
| | - J. R. A. Silva
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais
- Universidade Federal do Pará
- Belém
- Brazil
| | - C. N. Alves
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais
- Universidade Federal do Pará
- Belém
- Brazil
| | - B. Omondi
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Durban
- South Africa
| | - D. Ramjugernath
- School of Chemical Engineering
- University of KwaZulu-Natal
- Durban 4041
- South Africa
| | - N. A. Koorbanally
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Durban
- South Africa
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27
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Wu H, Wan R, Si Y, Ma P, Wang J, Niu J. A helical chain-like organic–inorganic hybrid arsenotungstate with color-tunable photoluminescence. Dalton Trans 2018; 47:1958-1965. [DOI: 10.1039/c7dt04608a] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A 1-D helical chain-like organic–inorganic hybrid arsenotungstate Na4H8[{Pr(H2O)2}2{As2W19O68}{WO2(mal)}2]·24H2O (1) exhibits excitation-wavelength-dependent emission behaviors with a reversible green–orange-yellow luminescence.
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Affiliation(s)
- Hechen Wu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Rong Wan
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Yanan Si
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
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28
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White light emission from a single organic molecule with dual phosphorescence at room temperature. Nat Commun 2017; 8:416. [PMID: 28871160 PMCID: PMC5583377 DOI: 10.1038/s41467-017-00362-5] [Citation(s) in RCA: 375] [Impact Index Per Article: 53.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/24/2017] [Indexed: 11/20/2022] Open
Abstract
The development of single molecule white light emitters is extremely challenging for pure phosphorescent metal-free system at room temperature. Here we report a single pure organic phosphor, namely 4-chlorobenzoyldibenzothiophene, emitting white room temperature phosphorescence with Commission Internationale de l’Éclair-age coordinates of (0.33, 0.35). Experimental and theoretical investigations reveal that the white light emission is emerged from dual phosphorescence, which emit from the first and second excited triplet states. We also demonstrate the validity of the strategy to achieve metal-free pure phosphorescent single molecule white light emitters by intrasystem mixing dual room temperature phosphorescence arising from the low- and high-lying triplet states. The development of single molecule white light-emitters is extremely challenging for pure phosphorescent metal-free systems at room temperature. Here the authors show a single pure organic room temperature phosphor, 4-chlorobenzoyldibenzothiophene, utilizing the emission from both T1 and T2 states.
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29
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Liu B, Dang F, Tian Z, Feng Z, Jin D, Dang W, Yang X, Zhou G, Wu Z. High Triplet Energy Level Achieved by Tuning the Arrangement of Building Blocks in Phosphorescent Polymer Backbones for Furnishing High Electroluminescent Performances in Both Blue and White Organic Light-Emitting Devices. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16360-16374. [PMID: 28441863 DOI: 10.1021/acsami.7b04509] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A high triplet energy level (ET) of ca. 2.83 eV has been achieved in a novel polymer backbone through tuning the arrangement of two kinds of building blocks, showing enhanced hole injection/transporting capacity. Based on this new polymer backbone with high ET, both blue and white phosphorescent polymers were successfully developed with a trade-off between high ET and enhanced charge-carrier transporting ability. In addition, their photophysical features, electrochemical behaviors, and electroluminescent (EL) properties have been characterized in detail. Benefitting from the advantages associated with the novel polymer backbone, the blue phosphorescent polymers show top-ranking EL performances with a maximum luminance efficiency (ηL) of 15.22 cd A-1, corresponding to a power efficiency (ηP) of 12.64 lm W-1, and external quantum efficiency (ηext) of 6.22% and the stable Commission Internationale de L'Eclairage (CIE) coordinates of (0.19, 0.38). Furthermore, blue-orange (B-O) complementary-colored white phosphorescent polymers based on this novel polymer backbone were also obtained showing encouraging EL efficiencies of 12.34 cd A-1, 9.59 lm W-1, and 4.10% in the optimized WOLED together with exceptionally stable CIE coordinates of (Δx = 0.014, Δy = 0.010) in a wide driving voltage range from 4 to 16 V. All of these attractive EL results achieved by these novel phosphorescent polymers show the great potential of this new polymer backbone in developing highly efficient phosphorescent polymers.
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Affiliation(s)
- Boao Liu
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Feifan Dang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Zhuanzhuan Tian
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Zhao Feng
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Deyuan Jin
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Wanping Dang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Guijiang Zhou
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
| | - Zhaoxin Wu
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Institute of Chemistry for New Energy Material, Department of Chemistry, School of Science, ‡State Key Laboratory for Mechanical Behavior of Materials, and §Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University , Xi'an 710049, P. R. China
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Hao Z, Liu Y, Huang Y, Meng F, Wang Y, Tan H, Su S, Zhu W. Synthesis and optoelectronic properties of dinuclear cyclometalated platinum (II) complexes containing naphthalene-functionalized carbazole groups in the single-emissive-layer WPLEDs. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.02.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rawe BW, Brown CM, MacKinnon MR, Patrick BO, Bodwell GJ, Gates DP. A C-Pyrenyl Poly(methylenephosphine): Oxidation “Turns On” Blue Photoluminescence in Solution and the Solid State. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00880] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin W. Rawe
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Christopher M. Brown
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Marc R. MacKinnon
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador, Canada A1B
3X7
| | - Brian O. Patrick
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Graham J. Bodwell
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador, Canada A1B
3X7
| | - Derek P. Gates
- Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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32
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Tkachenko IM, Belov NA, Kobzar YL, Dorokhin AV, Shekera OV, Shantarovich VP, Bekeshev VG, Shevchenko VV. Synthesis of fluorinated poly(arylene ether)s with dibenzodioxin and spirobisindane units from new bis(pentafluorophenyl)- and bis(nonafluorobiphenyl)-containing monomers. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.01.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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33
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Ho CL, Wong WY. Luminescent Metal-Containing Polymers for White Light Emission. Top Curr Chem (Cham) 2016; 374:64. [PMID: 27573506 DOI: 10.1007/s41061-016-0057-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 07/22/2016] [Indexed: 10/21/2022]
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34
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Shao SY, Ding JQ, Wang LX. New applications of poly(arylene ether)s in organic light-emitting diodes. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.07.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Ertl CD, Bolink HJ, Housecroft CE, Constable EC, Ortí E, Junquera-Hernández JM, Neuburger M, Shavaleev NM, Nazeeruddin MK, Vonlanthen D. Bis-Sulfone- and Bis-Sulfoxide-Spirobifluorenes: Polar Acceptor Hosts with Tunable Solubilities for Blue-Phosphorescent Light-Emitting Devices. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600247] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Liang J, Zhao S, Jiang XF, Guo T, Yip HL, Ying L, Huang F, Yang W, Cao Y. White Polymer Light-Emitting Diodes Based on Exciplex Electroluminescence from Polymer Blends and a Single Polymer. ACS APPLIED MATERIALS & INTERFACES 2016; 8:6164-6173. [PMID: 26886726 DOI: 10.1021/acsami.5b11926] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this Article, we designed and synthesized a series of polyfluorene derivatives, which consist of the electron-rich 4,4'-(9-alkyl-carbazole-3,6-diyl)bis(N,N-diphenylaniline) (TPA-Cz) in the side chain and the electron-deficient dibenzothiophene-5,5-dioxide (SO) unit in the main chain. The resulting copolymer PF-T25 that did not comprise the SO unit exhibited blue light-emission with the Commission Internationale de L'Eclairage coordinates of (0.16, 0.10). However, by physically blending PF-T25 with a blue light-emitting SO-based oligomer, a novel low-energy emission correlated to exciplex emerged due to the appropriate energy level alignment of TPA-Cz and the SO-based oligomers, which showed extended exciton lifetime as confirmed by time-resolved photoluminescent spectroscopy. The low-energy emission was also identified in copolymers consisting of SO unit in the main chain, which can effectively compensate for the high-energy emission to produce binary white light-emission. Polymer light-emitting diodes based on the exciplex-type single greenish-white polymer exhibit the peak luminous efficiency of 2.34 cd A(-1) and the maximum brightness of 12 410 cd m(-2), with Commission Internationale de L'Eclairage color coordinates (0.27, 0.39). The device based on such polymer showed much better electroluminescent stability than those based on blending films. These observations indicated that developing a single polymer with the generated exciplex emission can be a novel and effective molecular design strategy toward highly stable and efficient white polymer light-emitting diodes.
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Affiliation(s)
- Junfei Liang
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Sen Zhao
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Xiao-Fang Jiang
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Ting Guo
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Hin-Lap Yip
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Lei Ying
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Fei Huang
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Wei Yang
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Yong Cao
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology , Guangzhou 510640, China
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37
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Ban X, Sun K, Sun Y, Huang B, Jiang W. Enhanced Electron Affinity and Exciton Confinement in Exciplex-Type Host: Power Efficient Solution-Processed Blue Phosphorescent OLEDs with Low Turn-on Voltage. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2010-2016. [PMID: 26726923 DOI: 10.1021/acsami.5b10335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A benzimidazole/phosphine oxide hybrid 1,3,5-tris(1-(4-(diphenylphosphoryl)phenyl)-1H-benzo[d]imidazol-2-yl)benzene (TPOB) was newly designed and synthesized as the electron-transporting component to form an exciplex-type host with the conventional hole-transporting material tris(4-carbazoyl-9-ylphenyl)amine (TCTA). Because of the enhanced triplet energy and electron affinity of TPOB, the energy leakage from exciplex-state to the constituting molecule was eliminated. Using energy transfer from exciplex-state, solution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) achieved an extremely low turn-on voltage of 2.8 V and impressively high power efficiency of 22 lm W(-1). In addition, the efficiency roll-off was very small even at luminance up to 10 000 cd m(-2), which suggested the balanced charge transfer in the emission layer. This study demonstrated that molecular modulation was an effective way to develop efficient exciplex-type host for high performanced PHOLEDs.
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Affiliation(s)
- Xinxin Ban
- School of Chemistry and Chemical Engineering, Southeast University , Nanjing, Jiangsu 211189, People's Republic of China
| | - Kaiyong Sun
- School of Chemistry and Chemical Engineering, Southeast University , Nanjing, Jiangsu 211189, People's Republic of China
| | - Yueming Sun
- School of Chemistry and Chemical Engineering, Southeast University , Nanjing, Jiangsu 211189, People's Republic of China
| | - Bin Huang
- School of Chemistry and Chemical Engineering, Southeast University , Nanjing, Jiangsu 211189, People's Republic of China
| | - Wei Jiang
- School of Chemistry and Chemical Engineering, Southeast University , Nanjing, Jiangsu 211189, People's Republic of China
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38
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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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39
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Guo T, Zhong W, Zhang A, Zou J, Ying L, Yang W, Peng J. Efficient saturated red light-emitting polyfluorenes containing iridium complexes in side chains. NEW J CHEM 2016. [DOI: 10.1039/c5nj02185e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A maximum EQE of 7.8% with slow efficiency roll-off was attained based on a red light-emitting phosphorescent polymer PF-IrNiq1.
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Affiliation(s)
- 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
| | - Wenkai Zhong
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Anqi Zhang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Jianhua Zou
- 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
| | - 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
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40
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Wang Y, Lu Y, Gao B, Wang S, Ding J, Wang L, Jing X, Wang F. Single molecular tuning of the charge balance in blue-emitting iridium dendrimers for efficient nondoped solution-processed phosphorescent OLEDs. Chem Commun (Camb) 2016; 52:11508-11511. [DOI: 10.1039/c6cc05165k] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Charge balance modulation at a single dendritic molecule is demonstrated to be far superior to physical blending due to the elimination of phase segregation, leading to improved EQEs and negligible efficiency roll-off.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
- University of the Chinese Academy of Sciences
| | - Yaoming Lu
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- P. R. China
| | - Baoxiang Gao
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- P. R. China
| | - Shumeng Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Junqiao Ding
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Xiabin Jing
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Fosong Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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41
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Wang Y, Fan J, Li T, Wang Q, Shi J, Qu Z, Tan H, Liu Y, Zhu W. Broadband spectra with fluorescence and phosphorescence dual emission from bichromophoric platinum metallomesogens containing a 6,12-dihydro-indeno[1,2-b]fluorene linkage. RSC Adv 2016. [DOI: 10.1039/c6ra03391a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Two bichromophoric platinum metallomesogens, FJ-1 and FJ-2, exhibited fluorescence (1π,π*) and phosphorescence (3π,π*) dual emissions in solution. Their photophysical properties were detailedly investigated by experiment and theory calculation.
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Affiliation(s)
- Yafei Wang
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Jiang Fan
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Tianyi Li
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- PR China
| | - Qiong Wang
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Junwei Shi
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Zuoming Qu
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Hua Tan
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Yu Liu
- College of Chemistry
- Key Lab of Environment-Friendly Chemistry and Application of the Ministry of Education
- Xiangtan University
- Xiangtan 411105
- China
| | - Weiguo Zhu
- School of Materials Science & Engineering
- Changzhou University
- Changzhou 213164
- PR China
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Abstract
This feature article reviews the development of inorganic–organic hybrid white-light phosphors for the applications on light-emitting diodes (LEDs) and organic light-emitting diodes (OLEDs).
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Affiliation(s)
- Ming-Sheng Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Guo-Cong Guo
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
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Sun D, Zhou X, Liu J, Sun X, Li H, Ren Z, Ma D, Bryce MR, Yan S. Solution-Processed Blue/Deep Blue and White Phosphorescent Organic Light-Emitting Diodes (PhOLEDs) Hosted by a Polysiloxane Derivative with Pendant mCP (1,3-bis(9-carbazolyl)benzene). ACS APPLIED MATERIALS & INTERFACES 2015; 7:27989-27998. [PMID: 25651473 DOI: 10.1021/am507592s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The synthesis and characterization is reported of an efficient polysiloxane derivative containing the 1,3-bis(9-carbazolyl)benzene (mCP) moiety as a pendant unit on the polysiloxane backbone. In comparison with mCP, the mCP-polysiloxane hybrid (PmCPSi) has significantly improved thermal and morphological stabilities with a high decomposition temperature (Td = 523 °C) and glass transition temperature (Tg = 194 °C). The silicon-oxygen linkage of PmCPSi prevents intermolecular π-stacking and ensures a high triplet energy level (ET = 3.0 eV). Using PmCPSi as a host, blue phosphorescent organic light emitting devices (PhOLEDs) effectively confine triplet excitons, with efficient energy transfer to the guest emitter and a relatively low turn-on voltage of 5.8 V. A maximum external quantum efficiency of 9.24% and maximum current efficiency of 18.93 cd/A are obtained. These values are higher than for directly analogous poly(vinylcarbazole) (PVK) based devices (6.76%, 12.29 cd/A). Good color stability over a range of operating voltages is observed. A two-component "warm-white" device with a maximum current efficiency of 10.4 cd/A is obtained using a blend of blue and orange phosphorescent emitters as dopants in PmCPSi host. These results demonstrate that well-designed polysiloxane derivatives are highly efficient hosts suitable for low-cost solution-processed PhOLEDs.
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Affiliation(s)
| | - Xiaokang Zhou
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun, China
| | | | | | | | | | - Dongge Ma
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun, China
| | - Martin R Bryce
- Department of Chemistry, University of Durham , Durham DH1 3LE, United Kingdom
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Sun H, Shen W, Zhang X, Zhang D, Li M. Theoretical investigations of the electronic structures of carbazole-based triphenylphosphine oxide derivatives, potential bipolar host materials in blue-phosphorescent devices. J Mol Model 2015; 21:320. [PMID: 26631073 DOI: 10.1007/s00894-015-2859-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 11/08/2015] [Indexed: 10/22/2022]
Abstract
Density functional theory calculations were performed to investigate the electronic structures of bipolar host materials comprising a backbone of linked acceptor moieties where each acceptor was also linked to a pendant donor moiety. The acceptor was triphenylphosphine oxide with two of its phenyls substituted with fluorine atoms or nitrile groups (CN). The donor was carbazole (CZ) substituted, or not, with t-butyl groups. The HOMO and LUMO energy levels of these host molecules were mainly influenced by their respective hole- and electron-transport units. The t-butyl substituents on the CZ moieties had an adverse effect on the triplet energies (E T) of the host molecules, especially for molecules where the phenyls of the backbone chain were substituted with CN groups. While introducing CN substituents onto the backbone chain decreased the energy difference between the lowest singlet and triplet excited states (ΔE ST), it also caused the energy gap between the HOMO and LUMO to narrow. Among the host molecules investigated, that in which one of the phenyls in the acceptor moiety was linked to the donor while the other two phenyls in the acceptor were substituted with CN substituents exhibited the highest E T, balanced charge transport, a low charge-injection barrier, and a small ΔE ST, and is therefore a promising candidate host material for use in blue-phosphorescent devices. Graphical Abstract Density functional theory calculations were performed to explore the electronic properties of bipolar host materials comprising a backbone of linked acceptor moieties where each acceptor was also linked to a pendant donor moiety. All of the designed molecules with high triplet energies were found to be suitable for use as host materials when matched with a blue-light guest material. The results demonstrate that the host molecule in which one of the phenyls in the triphenylphosphine oxide acceptor moiety was linked to the carbazole donor while the other two phenyls in the acceptor moiety were substituted with CN substituents yields the highest blue-phosphorescent device performance, as this host molecule has interesting features such as a high E T, balanced charge transport, a low charge-injection barrier, and a small ΔE ST.
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Affiliation(s)
- Huili Sun
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Wei Shen
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Xiaguang Zhang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Dongmei Zhang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Ming Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China.
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Popescu AR, Rojo I, Teixidor F, Sillanpää R, Viñas C. Intramolecular Communication in Anionic Oxidized Phosphanes through a Chelated Proton. Chemistry 2015; 21:8613-25. [DOI: 10.1002/chem.201500307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Indexed: 11/10/2022]
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47
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Xie Z, Chen C, Xu S, Li J, Zhang Y, Liu S, Xu J, Chi Z. White-Light Emission Strategy of a Single Organic Compound with Aggregation-Induced Emission and Delayed Fluorescence Properties. Angew Chem Int Ed Engl 2015; 54:7181-4. [DOI: 10.1002/anie.201502180] [Citation(s) in RCA: 387] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Indexed: 01/10/2023]
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Xie Z, Chen C, Xu S, Li J, Zhang Y, Liu S, Xu J, Chi Z. White-Light Emission Strategy of a Single Organic Compound with Aggregation-Induced Emission and Delayed Fluorescence Properties. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502180] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xu X, Yang X, Zhao J, Zhou G, Wong WY. Recent Advances in Solution-Processable Dendrimers for Highly Efficient Phosphorescent Organic Light-Emitting Diodes (PHOLEDs). ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201402266] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Guo T, Zhong W, Zou J, Ying L, Yang W, Peng J. Efficient binary white light-emitting polymers grafted with iridium complexes as side groups. RSC Adv 2015. [DOI: 10.1039/c5ra16717e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Efficient binary white-light-emitting electrophosphorescent copolymers were designed and synthesized via Suzuki polymerization.
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Affiliation(s)
- 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
| | - Wenkai Zhong
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
| | - Jianhua Zou
- 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
| | - 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
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