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Gao Y, Peng W, Wei JA, Guo D, Zhang Y, Yu Q, Wang C, Wang L. Synthesis of High-Performance Colorless Polyimides with Asymmetric Diamine: Application in Flexible Electronic Devices. ACS APPLIED MATERIALS & INTERFACES 2024; 16:48005-48015. [PMID: 39191511 DOI: 10.1021/acsami.4c09667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Colorless polyimides (CPIs) are widely used as high-performance materials in flexible electronic devices. From a molecular design standpoint, the industry continues to encounter challenges in developing CPIs with desired attributes, including exceptional optical transparency, excellent thermal stability, and enhanced mechanical strength. This study presents and validates a method for controlling 2-substituents, with a specific emphasis on examining how these substituents affect the thermal, mechanical, optical, and dielectric characteristics of CPIs. The presence of two CF3 groups on the same side of the diamine structure ensured the transmittance of the film. The charge transfer effect and the molecular distance are dynamically regulated by changing the 2-substituent (-OCH3/-CH3/H/F). The polyimide exhibited a well-maintained equilibrium between transparency and thermal stability, with a T500nm value ranging from 86.2 to 89.6% in the visible region, and a glass transition temperature (Tg) ranging from 358.6 to 376.0 °C. Additionally, the 6FDA-2-MTFMB compound, when combined with methyl, excels as a protective layer and base material, exhibiting excellent performance in various aspects. It has been verified as an appropriate option for flexible photodetectors and wearable piezoresistive sensors. In summary, this systematic investigation will provide a comprehensive and demonstrative methodology for developing CPIs that are capable of adapting to flexible electronic devices.
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Affiliation(s)
- Yanyu Gao
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Weifeng Peng
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Ji-An Wei
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Dechao Guo
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Yunjie Zhang
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Qianqian Yu
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Cheng Wang
- Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, China
| | - LinGe Wang
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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2
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Lian M, Tian L, Huang G, Liang S, Zhang Y, Yi N, Fan L, Wu Q, Gan F, Wu Y. Recent Advances in Fluorescent Polyimides. Molecules 2024; 29:4072. [PMID: 39274921 PMCID: PMC11397098 DOI: 10.3390/molecules29174072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Revised: 08/23/2024] [Accepted: 08/26/2024] [Indexed: 09/16/2024] Open
Abstract
Polyimide (PI) refers to a type of high-performance polymer containing imide rings in the main chain, which has been widely used in fields of aerospace, microelectronic and photonic devices, gas separation technology, and so on. However, traditional aromatic PIs are, in general, the inefficient fluorescence or even no fluorescence, due to the strong inter- and intramolecular charge transfer (CT) interactions causing unavoidable fluorescence quenching, which greatly restricts their applications as light-emitting functional layers in the fabrication of organic light-emitting diode (OLED) devices. As such, the development of fluorescent PIs with high fluorescence quantum efficiency for their application fields in the OLED is an important research direction in the near future. In this review, we provide a comprehensive overview of fluorescent PIs as well as the methods to improve the fluorescence quantum efficiency of PIs. It is anticipated that this review will serve as a valuable reference and offer guidance for the design and development of fluorescent PIs with high fluorescence quantum efficiency, ultimately fostering further progress in OLED research.
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Affiliation(s)
- Manyu Lian
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Liyong Tian
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Guotao Huang
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Siming Liang
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Yangfan Zhang
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Ningbo Yi
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Longfei Fan
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Qinghua Wu
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Feng Gan
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Yancheng Wu
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
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3
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Jiang N, Zhu CY, Li KX, Xu YH, Bryce MR. Recent Progress in Nonconventional Luminescent Macromolecules and their Applications. Macromolecules 2024; 57:5561-5577. [PMID: 38948183 PMCID: PMC11210344 DOI: 10.1021/acs.macromol.4c00186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 05/15/2024] [Accepted: 05/23/2024] [Indexed: 07/02/2024]
Abstract
Traditional π-conjugated luminescent macromolecules typically suffer from aggregation-caused quenching (ACQ) and high cytotoxicity, and they require complex synthetic processes. In contrast, nonconventional luminescent macromolecules (NCLMs) with nonconjugated structures possess excellent biocompatibility, ease of preparation, unique luminescence behavior, and emerging applications in optoelectronics, biology, and medicine. NCLMs are currently believed to produce inherent luminescence due to through-space conjugation of overlapping electron orbitals in solid/aggregate states. However, as experimental facts continue to exceed expectations or even overturn some previous assumptions, there is still controversy about the detailed luminous mechanism of NCLMs, and extensive studies are needed to further explore the mechanism. This Perspective highlights recent progress in NCLMs and classifies and summarizes these advances from the viewpoint of molecular design, mechanism exploration, applications, and challenges and prospects. The aim is to provide guidance and inspiration for the huge fundamental and practical potential of NCLMs.
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Affiliation(s)
- Nan Jiang
- Key
Laboratory of Preparation and Applications of Environmental Friendly
Materials, Key Laboratory of Functional Materials Physics and Chemistry
of the Ministry of Education, Jilin Normal
University, Changchun, 130103, China
| | - Chang-Yi Zhu
- Key
Laboratory of Preparation and Applications of Environmental Friendly
Materials, Key Laboratory of Functional Materials Physics and Chemistry
of the Ministry of Education, Jilin Normal
University, Changchun, 130103, China
| | - Ke-Xin Li
- Key
Laboratory of Preparation and Applications of Environmental Friendly
Materials, Key Laboratory of Functional Materials Physics and Chemistry
of the Ministry of Education, Jilin Normal
University, Changchun, 130103, China
| | - Yan-Hong Xu
- Key
Laboratory of Preparation and Applications of Environmental Friendly
Materials, Key Laboratory of Functional Materials Physics and Chemistry
of the Ministry of Education, Jilin Normal
University, Changchun, 130103, China
| | - Martin R. Bryce
- Department
of Chemistry, Durham University, Durham DH1 3LE, U.K.
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4
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Su N, Chen B, Ding J. Two Birds with One Stone: Polymerized Thermally Activated Delayed Fluorescence Small Molecules. Chemistry 2024; 30:e202304095. [PMID: 38246880 DOI: 10.1002/chem.202304095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 01/23/2024]
Abstract
Thermally activated delayed fluorescence (TADF) polymers show a great potential in low-cost, large-area and flexible full-color flat-panel displays. One of the most promising design rules is based on TADF+Linker, where a small molecular TADF unit is bonded to each other by a simple linker. Unlike the expensive vacuum deposition for small molecules, these polymerized TADF small molecules (Poly-TADF-SMs) are capable of cost-effective solution processing. Meanwhile, the good luminescent property of small molecular TADF emitters can be well inherited by Poly-TADF-SMs so as to bridge the efficiency gap between small molecules and polymers. Herein, we will highlight the recent progress of Poly-TADF-SMs, together with emphasis on their molecular design, photophysical and electroluminescence properties.
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Affiliation(s)
- Ning Su
- School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Bitian Chen
- School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Southwest United Graduate School, Kunming, 650092, P. R. China
| | - Junqiao Ding
- School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
- Southwest United Graduate School, Kunming, 650092, P. R. China
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5
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Yang X, Waterhouse GIN, Lu S, Yu J. Recent advances in the design of afterglow materials: mechanisms, structural regulation strategies and applications. Chem Soc Rev 2023; 52:8005-8058. [PMID: 37880991 DOI: 10.1039/d2cs00993e] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Afterglow materials are attracting widespread attention owing to their distinctive and long-lived optical emission properties which create exciting opportunities in various fields. Recent research has led to the discovery of many new afterglow materials featuring high photoluminescence quantum yields (PLQY) and lifetimes of up to several hours under ambient conditions. Afterglow materials are typically categorized according to their luminescence mechanism, such as long-persistent luminescence (LPL), room temperature phosphorescence (RTP), or thermally activated delayed fluorescence (TADF). Through rational design and novel synthetic strategies to modulate spin-orbit coupling (SOC) and populate triplet exciton states (T1), luminophores with long lifetimes and bright afterglow characteristics can be realized. Initial research towards afterglow materials focused mainly on pure inorganic materials, many of which possessed inherent disadvantages such as metal toxicity or low energy emissions. In recent years, organic-inorganic hybrid afterglow materials (OIHAMs) have been developed with high PLQY and long lifetimes. These hybrid materials exploit the tunable structure and easy processing of organic molecules, as well as enhanced SOC and intersystem crossing (ISC) processes involving heavy atom dopants, to achieve excellent afterglow performance. In this review, we begin by briefly discussing the structure and composition of inorganic and organic-inorganic hybrid afterglow materials, including strategies for regulating their lifetime, PLQY and luminescence wavelength. The specific advantages of organic-inorganic hybrid afterglow materials, including low manufacturing costs, diverse molecular/electronic structures, tunable structures and optical properties, and compatibility with a variety of substrates, are emphasized. Subsequently, we discuss in detail the fundamental mechanisms used by afterglow materials, their classification, design principles, and end applications (including sensing, anticounterfeiting, and photoelectric devices, among others). Finally, existing challenges and promising future directions are discussed, laying a platform for the design of afterglow materials for specific applications.
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Affiliation(s)
- Xin Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
- International Center of Future Science, Jilin University, Changchun 130012, China
| | | | - Siyu Lu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
- International Center of Future Science, Jilin University, Changchun 130012, China
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6
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Xin Y, Zhu Y, Chi R, Duan C, Yan P, Han C, Xu H. Phosphine-Oxide-Balanced Intra- and Interchain Through-Space Charge Transfer in Thermally Activated Delayed Fluorescence Polymers: Beyond 30% External Quantum Efficiency. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2304103. [PMID: 37401728 DOI: 10.1002/adma.202304103] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/05/2023]
Abstract
Through-space charge transfer (TSCT) is crucial for developing highly efficient thermally activated delayed fluorescence polymers. The balance of intra- and interchain TSCT can markedly improve performance, but it is still a big challenge. In this work, an effective strategy for "intra- and interchain TSCT balance" is demonstrated by way of a series of non-conjugated copolymers containing a 9,9-dimethylacridine donor and triazine-phosphine oxide (PO)-based acceptors. Steady-state and transient emission spectra indicate that compared to the corresponding blends, the copolymers can indeed achieve balanced intra- and interchain TSCT by accurately optimizing the inductive and steric effects of the acceptors. The DPOT acceptor with the strongest electron-withdrawing ability and the second bigger steric hindrance endows its copolymers with state-of-the-art photoluminescence and electroluminescence quantum efficiencies beyond 95% and 32%, respectively. This demonstrates that, compared to other congeners, the synergistic inductive and steric effects effectively enhance TSCT in DPOT-based copolymers for radiation, and suppress singlet and triplet quenching. The record-high efficiencies of its devices make this kind of copolymers hold the potential for low-cost, large-scale, and high-efficiency applications.
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Affiliation(s)
- Ying Xin
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
| | - Yonglin Zhu
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
| | - Ruixin Chi
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
| | - Chunbo Duan
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
| | - Pengfei Yan
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
| | - Chunmiao Han
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
| | - Hui Xu
- Key Laboratory of Functional Inorganic Material Chemistry (Chinese Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China
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7
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Woo JY, Park MH, Jeong SH, Kim YH, Kim B, Lee TW, Han TH. Advances in Solution-Processed OLEDs and their Prospects for Use in Displays. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207454. [PMID: 36300804 DOI: 10.1002/adma.202207454] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/05/2022] [Indexed: 06/16/2023]
Abstract
This review outlines problems and progress in development of solution-processed organic light-emitting diodes (SOLEDs) in industry and academia. Solution processing has several advantages such as low consumption of materials, low-cost processing, and large-area manufacturing. However, use of a solution process entails complications, such as the need for solvent resistivity and solution-processable materials, and yields SOLEDs that have limited luminous efficiency, severe roll-off characteristics, and short lifetime compared to OLEDs fabricated using thermal evaporation. These demerits impede production of practical SOLED displays. This review outlines the industrial demands for commercial SOLEDs and the current status of SOLED development in industries and academia, and presents research guidelines for the development of SOLEDs that have high efficiency, long lifetime, and good processability to achieve commercialization.
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Affiliation(s)
- Joo Yoon Woo
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
| | - Min-Ho Park
- Department of Organic Materials and Fiber Engineering, Soongsil University, 369 Sangdo-Ro, Dongjak-Gu, Seoul, 06978, Republic of Korea
| | - Su-Hun Jeong
- Future Technology Research Center, LG Chem, Ltd., 30, Magokjunang 10-ro, Gangseo-gu, Seoul, 07794, Republic of Korea
| | - Young-Hoon Kim
- Department of Energy Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
| | - Byungjae Kim
- Future Technology Research Center, LG Chem, Ltd., 30, Magokjunang 10-ro, Gangseo-gu, Seoul, 07794, Republic of Korea
| | - Tae-Woo Lee
- Department of Materials Science and Engineering, School of Chemical and Biological Engineering, Institute of Engineering Research, Research Institute of Advanced Materials, Soft Foundry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Tae-Hee Han
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
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8
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Feng R, Wang M, Zhang Z, Hu P, Wu Z, Shi G, Xu B, Liu H, Ma LJ. Polymer-Based Long-Lived Phosphorescence Materials over a Broad Temperature Based on Coumarin Derivatives as Information Anti-Counterfeiting. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37335904 DOI: 10.1021/acsami.3c03207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
The development of new polymer-based room-temperature phosphorescence materials is of great significance. By a special molecule design and a set of feasible property-enhancing strategies, coumarin derivatives (CMDs, Ma-Mf) were doped into polyvinyl alcohol (PVA), polyacrylamide (PAM), corn starch, and polyacrylonitrile (PAN) as information anti-counterfeiting. CMDs-doped PVA and CMDs-doped corn starch films showed long-lived phosphorescence emissions up to 1246 ms (Ma-PVA) and 697 ms (Ma-corn starch), reaching over 10 s afterglow under naked eye observation under ambient conditions. Significantly, CMDs-doped PAM films can display long-lived phosphorescence emissions in a wide temperature range (100-430 K). For example, the Me-PAM film has a phosphorescence lifetime of 16 ms at 430 K. The use of PAM with the strong polarity and rigidity has expanded the temperature range of long-life polymer-based phosphorescent materials. The present long-lived phosphorescent systems provide the possibility for developing new polymer-based organic afterglow materials with robust phosphorescence.
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Affiliation(s)
- Runcong Feng
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Muxi Wang
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Zhongyan Zhang
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Pengtao Hu
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Zetao Wu
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Guangyi Shi
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Bingjia Xu
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Hong Liu
- School of Environment, South China Normal University, Guangzhou 510006, P. R. China
| | - Li-Jun Ma
- School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
- Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, P. R. China
- Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, South China Normal University, Guangzhou 510631, P. R. China
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9
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Tu F, Ye Z, Mu Y, Luo X, Liao L, Hu D, Ji S, Yang Z, Chi Z, Huo Y. Photoinduced Radical Persistent Luminescence in Semialiphatic Polyimide System with Temperature and Humidity Resistance. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2301017. [PMID: 37119475 PMCID: PMC10375117 DOI: 10.1002/advs.202301017] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/01/2023] [Indexed: 06/19/2023]
Abstract
Organic persistent luminescence (pL) systems with photoresponsive dynamic features have valuable applications in the fields of data encryption, anticounterfeiting, and bioimaging. Photoinduced radical luminescent materials have a unique luminous mechanism with the potential to achieve dynamic pL. It is extremely challenging to obtain radical pL under ambient conditions; on account of it, it is unstable in air. Herein, a new semialiphatic polyimide-based polymer (A0) is developed, which can achieve dynamic pL through reversible conversion of radical under photoexcitation. A "joint-donor-spacer-acceptor" molecular design strategy is applied to effectively modulate the intramolecular charge-transfer and charge-transfer complex interactions, resulting in effective protection of the radical generated under photoirradiation. Meanwhile, polyimide-based polymers of A1-A4 are obtained by doping different amine-containing fluorescent dyes to modulate the dynamic afterglow color from green to red via the triplet to singlet Förster resonance energy-transfer pathway. Notably, benefiting from the structural characteristics of the polyimide-based polymer, A0-A4 have excellent processability, thermal stability, and mechanical properties and can be applied directly in extreme environments such as high temperatures and humidity.
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Affiliation(s)
- Fanlin Tu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Zecong Ye
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yingxiao Mu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275, China
| | - Xuwei Luo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Liyun Liao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Dehua Hu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Shaomin Ji
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Zhiyong Yang
- Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Zhenguo Chi
- Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- Analytical & Testing Center, Guangdong University of Technology, Guangzhou, 510006, China
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10
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Wu Z, Li D, Wei Z, Wang X, Long S, Yang J, Zhang G. Heat-Resistant and Color-Changing Luminescent Polysulfone for Information Encryption and Fire Alarming. ACS APPLIED MATERIALS & INTERFACES 2023; 15:19527-19535. [PMID: 37026994 DOI: 10.1021/acsami.3c03183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
An intrinsic difficulty with thermally responsive photoluminescent materials is that high temperatures usually destroy luminance due to the notorious thermal quenching effect. Limited by the vulnerable chemical structure and soft skeleton, most of the existing photoluminescent responsive materials fail to indicate or work at a surging temperature over 100 °C, thus limiting application in display and alarming in harsh conditions. Herein, enlightened by chameleon's adaptive nature to external stimulus, we introduce a topologically optimized electron donor-acceptor (DA) structure and supramolecular interactions of lanthanide ions into the polymer backbone. The emission color determined by the DA structure is stable at high temperatures, and metal-ligand interaction phosphorescence is temperature-adjustable. Owing to the excellent reproducibility and heat resistance of composite films, the sensors can be bent into different three-dimensional structures and adhered to metal surfaces as flexible thermometers with superior display resolution. The polymer composite film could be directly applied as a photoluminescent quick response (QR) code, with patterns simultaneously variable to a temperature from 30 to 150 °C free of manual operation. More importantly, the polymeric composite could be in-situ-oxidized to a "sulfone" structure with an enhanced glass transition temperature of 297-304 °C. The heat- and flame-resistant characteristics of the oxidized films give rise to the application of fire alarming devices since it can locate the fire source and respond exactly depending on the distance from the fire. The unique display, encryption, and alarming functions of the polymeric composite studied in this work bring forward a new concept of developing a great information security and disaster monitoring system with the application of temperature-responsive materials.
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Affiliation(s)
- Zhefu Wu
- College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610064, P.R. China
| | - Dongsheng Li
- Shaanxi Engineering Research Center of Special Sealing Technology, Xi'an Aerospace propulsion Institute, Xi'an 710100, P.R. China
| | - Zhimei Wei
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P.R. China
| | - Xiaojun Wang
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P.R. China
| | - Shengru Long
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P.R. China
| | - Jie Yang
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P.R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P.R. China
| | - Gang Zhang
- Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P.R. China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P.R. China
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11
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Wang W, Chen K, Wu H, Long Y, Zhao J, Jiang L, Liu S, Chi Z, Xu J, Zhang Y. Benzoxazole-Based Hybridized Local and Charge-Transfer Deep-Blue Emitters for Solution-Processable Organic Light-Emitting Diodes and the In fluences of Hexahydrophthalimido. ACS APPLIED MATERIALS & INTERFACES 2023; 15:13415-13426. [PMID: 36867671 DOI: 10.1021/acsami.2c23254] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Hybridized local and charge-transfer (HLCT) emitters have attracted extensive attention, but the insolubility and severe self-aggregation tendency restrict their applications in solution-processable organic light-emitting diodes (OLEDs), particularly deep-blue OLEDs. Herein, two novel benzoxazole-based solution-processable HLCT emitters (BPCP and BPCPCHY) are designed and synthesized, in which benzoxazole acts as an acceptor, carbazole acts as a donor, and hexahydrophthalimido (HP, with a large intramolecular torsion angle and spatial distortion characteristics) acts as a bulky modified end-group with weak electron-withdrawing effects. Both BPCP and BPCPCHY exhibit HLCT characteristics and emit near ultraviolet in toluene at 404 and 399 nm. Compared to the BPCP, the BPCPCHY solid shows much better thermal stability (Tg, 187 vs 110 °C), higher oscillator strengths of the S1-to-S0 transition (0.5346 vs 0.4809), and faster kr (1.1 × 108 vs 7.5 × 107 s-1) and thus a much higher ΦPL in the neat film. The introduction of HP groups greatly suppresses the intra-/intermolecular charge-transfer effect and self-aggregation trends, and the BPCPCHY neat films placed in air for 3 months can still maintain an excellent amorphous morphology. The solution-processable deep-blue OLEDs utilizing BPCP and BPCPCHY achieved a CIEy of 0.06 with maximum external quantum efficiency (EQEmax) values of 7.19 and 8.53%, respectively, which are among the best results of the solution-processable deep-blue OLEDs based on the "hot exciton" mechanism. All of the above results indicate that benzoxazole is an excellent acceptor for constructing deep-blue HLCT materials, and the strategy of introducing HP as a modified end-group into an HLCT emitter provides a new perspective to develop solution-processable efficient deep-blue OLEDs with high morphological stability.
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Affiliation(s)
- Wenhui Wang
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Kaijin Chen
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Huiyan Wu
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
- Guangdong Testing Institute of Product Quality Supervision, Guangzhou 510670, China
| | - Yubo Long
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Juan Zhao
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Long Jiang
- Instrumental Analysis & Research Center, Sun Yat-sen University, Guangzhou 510275, China
| | - Siwei Liu
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhenguo Chi
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Jiarui Xu
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Yi Zhang
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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12
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Achieving both low thermal expansion and low birefringence for polyimides by regulating chain structures. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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13
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Wang CO, Zhai L, Mo S, Liu Y, Gao MY, Jia Y, He MH, Fan L. Effect of Aggregation Structure on Thermal Expansion Behavior of Polyimide Films with Different Thickness. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2785-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Jiao L, Du Z, Dai X, Wang H, Dong Z, Yao H, Qiu X. Based on rigid xanthone group and hydrogen bonding to construct polyimide films with low coefficient of thermal expansion, high temperature resistance, and fluorescent property. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Zhang J, Wei Q, Lyu L, Cao L, Zhao M, Fei N, Wang T, Ge Z. Thermally Activated Delayed Fluorescent (TADF) Mono‐Polymeric OLED with Higher EQE over Its TADF Repeating Unit. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jiasen Zhang
- College of material science and engineering Zhejiang Sci‐Tech University Hangzhou 310018 PR China
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 PR China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences PR China
| | - Qiang Wei
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 PR China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences PR China
| | | | - Liang Cao
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 PR China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences PR China
| | - Mengyu Zhao
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 PR China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences PR China
| | - Nannan Fei
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 PR China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences PR China
| | - Tao Wang
- College of material science and engineering Zhejiang Sci‐Tech University Hangzhou 310018 PR China
| | - Ziyi Ge
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 PR China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences PR China
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16
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Fang F, Yuan Y, Wan Y, Li J, Song Y, Chen WC, Zhao D, Chi Y, Li M, Lee CS, Zhang J. Near-Infrared Thermally Activated Delayed Fluorescence Nanoparticle: A Metal-Free Photosensitizer for Two-Photon-Activated Photodynamic Therapy at the Cell and Small Animal Levels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106215. [PMID: 35018711 DOI: 10.1002/smll.202106215] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Thermally activated delayed fluorescence (TADF) materials with extremely small singlet-triplet energy offsets have opened new horizons for the development of metal-free photosensitizers for photodynamic therapy (PDT) in recent years. However, the exploration of near-infrared (NIR) TADF emitters for efficient two-photon-excited (TPE) PDT is still a formidable challenge, thus it has not been reported yet. In this study, purely organic photosensitizers (PSs) based on the TADF nanoparticles (NIR-TADF NPs) are designed for efficient TPE-PDT, which show excellent singlet oxygen generation ability. Thanks to the intrinsic two-photon excitation and NIR emission characteristics, the NIR-TADF NPs demonstrate promising potential in both single-photon-excited (SPE) and TPE NIR imaging. More importantly, the anti-tumor efficiency and biosafety of TADF-based PSs at the small animal level are confirmed in A549 tumor xenograft models under TPE laser irradiance, which will facilitate the practical biomedical applications of TADF materials. This work not only provides a promising strategy to develop metal-free PSs, but also expands the applied scope of TADF-based nanotherapeutics and advances their possible clinical translation in cancer therapy.
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Affiliation(s)
- Fang Fang
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Sciences, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Yi Yuan
- Department of Materials Science and Engineering, and Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, SAR, 999077, P. R. China
| | - Yingpeng Wan
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, SAR, 999077, P. R. China
| | - Jing Li
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Yueyue Song
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Sciences, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Wen-Cheng Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Dongxu Zhao
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Sciences, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Yun Chi
- Department of Materials Science and Engineering, and Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, SAR, 999077, P. R. China
| | - Menglin Li
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, SAR, 999077, P. R. China
| | - Jinfeng Zhang
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Sciences, Beijing Institute of Technology, Beijing, 100081, P. R. China
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Teng JM, Zhang DW, Wang YF, Chen CF. Chiral Conjugated Thermally Activated Delayed Fluorescent Polymers for Highly Efficient Circularly Polarized Polymer Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1578-1586. [PMID: 34962755 DOI: 10.1021/acsami.1c20244] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Two novel chiral conjugated polymers R-P and S-P designed and synthesized from a pair of circularly polarized thermally activated delayed fluorescence (CP-TADF) enantiomers are presented in this work. The two polymers exhibited excellent TADF properties with small singlet-triplet energy gaps (ΔEST) of 0.045 and 0.061 eV and relatively high photoluminescence quantum yields (PLQYs) of 72 and 76%, respectively. Besides, intense mirror-image circularly polarized luminescence signals were detected from R-P and S-P in both solution and film states with dissymmetry factors (|glum|) of up to 1.9 × 10-3. Furthermore, solution-processed circularly polarized polymer light-emitting diodes (CP-PLEDs) fabricated with R-P and S-P achieved high maximum external quantum efficiencies of 14.9 and 15.8% and high maximum brightness (Lmax) of 8940 and 12,180 cd/m2 with yellowish-green emission peaks at 546 and 544 nm, respectively. Moreover, intense circularly polarized electroluminescence signals with electroluminescence dissymmetry factors (gEL) of -1.5 × 10-3 and +1.6 × 10-3 were detected from the CP-PLED devices fabricated with R-P and S-P, respectively.
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Affiliation(s)
- Jin-Ming Teng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Da-Wei Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yin-Feng Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuan-Feng Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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18
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Fang F, Zhu L, Li M, Song Y, Sun M, Zhao D, Zhang J. Thermally Activated Delayed Fluorescence Material: An Emerging Class of Metal-Free Luminophores for Biomedical Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2102970. [PMID: 34705318 PMCID: PMC8693050 DOI: 10.1002/advs.202102970] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/27/2021] [Indexed: 05/06/2023]
Abstract
The development of simple, efficient, and biocompatible organic luminescent molecules is of great significance to the clinical transformation of biomaterials. In recent years, purely organic thermally activated delayed fluorescence (TADF) materials with an extremely small single-triplet energy gap (ΔEST ) have been considered as the most promising new-generation electroluminescence emitters, which is an enormous breakthrough in organic optoelectronics. By merits of the unique photophysical properties, high structure flexibility, and reduced health risks, such metal-free TADF luminophores have attracted tremendous attention in biomedical fields, including conventional fluorescence imaging, time-resolved imaging and sensing, and photodynamic therapy. However, there is currently no systematic summary of the TADF materials for biomedical applications, which is presented in this review. Besides a brief introduction of the major developments of TADF material, the typical TADF mechanisms and fundamental principles on design strategies of TADF molecules and nanomaterials are subsequently described. Importantly, a specific emphasis is placed on the discussion of TADF materials for various biomedical applications. Finally, the authors make a forecast of the remaining challenges and future developments. This review provides insightful perspectives and clear prospects towards the rapid development of TADF materials in biomedicine, which will be highly valuable to exploit new luminescent materials.
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Affiliation(s)
- Fang Fang
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
| | - Lin Zhu
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
| | - Min Li
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
| | - Yueyue Song
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
| | - Meng Sun
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
| | - Dongxu Zhao
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
| | - Jinfeng Zhang
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life SciencesBeijing Institute of TechnologyBeijing100081P. R. China
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19
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Wang YF, Li M, Teng JM, Zhou HY, Zhao WL, Chen CF. Chiral TADF-Active Polymers for High-Efficiency Circularly Polarized Organic Light-Emitting Diodes. Angew Chem Int Ed Engl 2021; 60:23619-23624. [PMID: 34490710 DOI: 10.1002/anie.202110794] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 08/27/2021] [Indexed: 12/11/2022]
Abstract
A strategy of chiral donor-acceptor copolymerization is proposed to develop chiral nonconjugated polymers with thermally activated delayed fluorescence (TADF). Based on this strategy, two pairs of chiral polymers (R,R)-/(S,S)-pTpAcDPS and (R,R)-/(S,S)-pTpAcBP were synthesized. The alternating copolymerization of the chiral donors and acceptors could effectively separate the frontier molecular orbitals, which made the polymers show small ΔEST of 0.01-0.03 eV and efficient TADF properties. Moreover, the polymers also showed the quantum yield of up to 92 % and the circularly polarized luminescence. The solution-processed circularly polarized organic light-emitting diodes showed circularly polarized electroluminescence signals with high external quantum efficiencies of up to 22.1 % and maximum luminance of up to 34350 cd m-2 . This is the first report of CP-OLEDs based on chiral TADF polymer, which provides a useful and valuable guidance for the development of high-efficiency CPEL polymers.
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Affiliation(s)
- Yin-Feng Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meng Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jin-Ming Teng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - He-Ye Zhou
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen-Long Zhao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chuan-Feng Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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20
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Chiral TADF‐Active Polymers for High‐Efficiency Circularly Polarized Organic Light‐Emitting Diodes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110794] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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