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Liu W, Deng S, Zhang L, Ju CW, Xie Y, Deng W, Chen J, Wu H, Cao Y. Short-Wavelength Infrared Organic Light-Emitting Diodes from A-D-A'-D-A Type Small Molecules with Emission beyond 1100 nm. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302924. [PMID: 37262926 DOI: 10.1002/adma.202302924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/15/2023] [Indexed: 06/03/2023]
Abstract
Short-wavelength infrared (SWIR) organic light-emitting diodes (OLEDs) have attracted great interest due to their potential applications in biological imaging, infrared lighting, optical communication, environmental monitoring, and surveillance. Due to an intrinsic limitation posed by the energy-gap law, achieving high-brightness in SWIR OLEDs remains a challenge. Herein, the study reports the use of novel A-D-A'-D-A type small molecules NTQ and BTQ for high-performance SWIR OLEDs. Benefiting from multiple D-A effect in conjugated skeleton, the small molecules NTQ and BTQ exhibit narrow optical gaps of 1.23 and 1.13 eV, respectively. SWIR electroluminescence (EL) emission from OLEDs based on NTQ and BTQ is achieved, with emission peaks at 1140 and 1175 nm, respectively. Not only owing to a negligible efficiency roll-off across the full range of applied current density but also the ability to afford a high operation current density of 5200 mA cm-2 , the resultant SWIR OLEDs based on NTQ exhibit a maximal radiant exitance of =1.12 mW cm-2 . Furthermore, the NTQ-based OLEDs also possess sub-gap turn-on voltage of 0.85 V, which is close to the physical limits derived from the generalized Kirchhoff and Planck equation. This work demonstrates that A-D-A'-D-A type small molecules offer significant promise for NIR/SWIR emitting material innovations.
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Affiliation(s)
- Wansheng Liu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Suinan Deng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Lianjie Zhang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Cheng-Wei Ju
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA
| | - Yuan Xie
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Wanyuan Deng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Junwu Chen
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Hongbin Wu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Yong Cao
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
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2
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Ma B, Ding Z, Liu D, Zhou Z, Zhang K, Dang D, Zhang S, Su SJ, Zhu W, Liu Y. A Feasible Strategy for a Highly Efficient Thermally Activated Delayed Fluorescence Emitter Over 900 nm Based on Phenalenone Derivatives. Chemistry 2023; 29:e202301197. [PMID: 37154226 DOI: 10.1002/chem.202301197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 05/10/2023]
Abstract
Near-infrared (NIR) organic light-emitting diodes (OLEDs) suffer from the low external electroluminescence (EL) quantum efficiency (EQE), which is a critical obstacle for potential applications. Herein, 1-oxo-1-phenalene-2,3-dicarbonitrile (OPDC) is employed as an electron-withdrawing aromatic ring, and by incorporating with triphenylamine (TPA) and biphenylphenylamine (BBPA) donors, two novel NIR emitters with thermally activated delayed fluorescence (TADF) characteristics, namely OPDC-DTPA and OPDC-DBBPA, are first developed and compared in parallel. Intense NIR emission peaks at 962 and 1003 nm are observed in their pure films, respectively. Contributed by the local excited (LE) characteristics in the triplet (T1 ) state in synergy with the charge transfer (CT) characteristics for the singlet (S1 ) state to activate TADF emission, the solution processable doped NIR OLEDs based on OPDC-DTPA and OPDC-DBBPA yield EL peaks at 834 and 906 nm, accompanied with maximum EQEs of 0.457 and 0.103 %, respectively, representing the state-of-the-art EL performances in the TADF emitter-based NIR-OLEDs in the similar EL emission regions so far. This work manifests a simple and effective strategy for the development of NIR TADF emitters with long wavelength and efficiency synchronously.
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Affiliation(s)
- Bin Ma
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Zhenming Ding
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Denghui Liu
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Zhongxin Zhou
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Kai Zhang
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Dongfeng Dang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Shiyue Zhang
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Shi-Jian Su
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Weiguo Zhu
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Yu Liu
- School of Materials Science and Engineering, Jiangsu Engineering Research Center of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, 213164, P. R. China
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3
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Ahmed Z, Mahiya K, Iftikhar K. Synthesis, crystal structure, NMR and near infra-red luminescence studies of nine-coordinate Nd and Yb complexes based on fluorinated β‑diketone and a tridentate antenna chromophore, 2, 4, 6-Tris-(2-pyridyl)-s-triazine. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Hlavatsch M, Mizaikoff B. Advanced mid-infrared lightsources above and beyond lasers and their analytical utility. ANAL SCI 2022; 38:1125-1139. [PMID: 35780446 PMCID: PMC9420685 DOI: 10.1007/s44211-022-00133-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 05/11/2022] [Indexed: 11/05/2022]
Abstract
In the mid-infrared (MIR) spectral range, a series of applications have successfully been shown in the fields of sensing, security and defense, energy conservation, and communications. In particular, rapid and recent developments in MIR light sources have significantly increased the interest in developing MIR optical systems, sensors, and diagnostics especially for chem/bio detection schemes and molecular analytical application scenarios. In addition to the advancements in optoelectronic light sources, and especially quantum and interband cascade lasers (QCLs, ICLs) largely driving the increasing interest in the MIR regime, also thermal emitters and light emitting diodes (LEDs) offer opportunities to alternatively fill current gaps in spectral coverage specifically with analytical applications and chem/bio sensing/diagnostics in the focus. As MIR laser technology has been broadly covered in a variety of articles, the present review aims at summarizing recent developments in MIR non-laser light sources highlighting their analytical utility in the MIR wavelength range.
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Affiliation(s)
- Michael Hlavatsch
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
- Hahn-Schickard, Institute for Microanalysis Systems, Sedanstrasse 14, 89077, Ulm, Germany.
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Aguilà D, Roubeau O, Aromí G. Designed polynuclear lanthanide complexes for quantum information processing. Dalton Trans 2021; 50:12045-12057. [PMID: 34382982 DOI: 10.1039/d1dt01862k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The design of dissymmetric organic ligands featuring combinations of 1,3-diketone and 2,6-diacetylpyridine coordination pockets has been exploited to produce dinuclear and trinuclear lanthanide-based coordination compounds. These molecules exhibit two or more non-equivalent Ln ions, most remarkably enabling the access to well-defined heterolanthanide compositions. The site-selective disposition of each metal ion within the molecular entities allows the study of each centre individually as a spin-based quantum bit, affording unparalleled versatility for quantum gate design. The inherent weak interaction between the Ln ions permits the performance of multi-qubit quantum logical operations realized through their derived magnetic states, or implementing quantum-error correction protocols. The different studies performed to date on these systems are revised, showing their vast potential within spin-based quantum information processing.
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Affiliation(s)
- David Aguilà
- Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Universitat de Barcelona, Barcelona, Spain. .,Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
| | - Olivier Roubeau
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, Spain.,Departamento de Física de la Material Condensada, Universidad de Zaragoza, Zaragoza, Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Universitat de Barcelona, Barcelona, Spain. .,Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
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6
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Cui M, Yang L, Li F, Zhou L, Song Y, Fang SM, Liu CM, Li XL. Multifunctional Dy III Enantiomeric Pairs Showing Enhanced Photoluminescences and Third-Harmonic Generation Responses through the Coordination Role of Homochiral Tridentate N,N,N-Pincer Ligands. Inorg Chem 2021; 60:13366-13375. [PMID: 34428893 DOI: 10.1021/acs.inorgchem.1c01682] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By utilizing Dy(hfac)3(H2O)2 to react with enantiomerically pure tridentate N,N,N-pincer ligands, namely (-)/(+)-2,6-bis(4',5'-pinene-2'-pyridyl)pyridine (LR and LS), respectively, homochiral DyIII enantiomeric pairs formulated as Dy(hfac)3LR/Dy(hfac)3LS (R-1/S-1) (hfac- = hexafluoroacetylacetonate) were achieved and structurally characterized. Meanwhile, their magnetic, photoluminescent (PL), and chiroptical properties were probed. The PL test results indicate that the precursor Dy(hfac)3(H2O)2 only shows very weak emission, while R-1 exhibits characteristic DyIII f-f transition emission bands at room temperature. Furthermore, the nonlinear optical responses of Dy(hfac)3(H2O)2, LR/LS, and R-1/S-1 were investigated in detail based on crystalline samples. The results reveal that LR and LS present the coexistence of second- and third-harmonic generation (SHG and THG) responses with more intense signals for SHG responses; and Dy(hfac)3(H2O)2 merely displays weak THG responses, while R-1 and S-1 also only exhibit THG responses. However, the THG intensities of R-1 and S-1 are more than six times larger than that of Dy(hfac)3(H2O)2 under the identical measurement conditions. These results demonstrate that introducing homochiral N,N,N-pincer ligands to replace two H2O molecules of Dy(hfac)3(H2O)2 results in significant improvements of both PL performances and THG responses of resultant R-1/S-1 enantiomers. R-1 and S-1 integrate PL, THG, and chiral optical activity in one molecule, suggesting their multifunctional merits. In particular, a convenient method is introduced to simultaneously test THG and SHG responses of molecular materials based on crystalline samples in this work.
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Affiliation(s)
- Minghui Cui
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China
| | - Linpo Yang
- Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, PR China
| | - Fengcai Li
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China
| | - Liming Zhou
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China
| | - Yinglin Song
- Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, PR China
| | - Shao-Ming Fang
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China
| | - Cai-Ming Liu
- Bejing National Laboratory for Molecular Sciences, Institution of Chemistry, Chinese Academy of Sciences, Bejing 100190, PR China
| | - Xi-Li Li
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China
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7
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Peng XX, Zhu XF, Zhang JL. Near Infrared (NIR) imaging: Exploring biologically relevant chemical space for lanthanide complexes. J Inorg Biochem 2020; 209:111118. [PMID: 32502875 DOI: 10.1016/j.jinorgbio.2020.111118] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/13/2020] [Accepted: 05/17/2020] [Indexed: 02/08/2023]
Abstract
Near Infrared (NIR) imaging agents are extensively used in the biological or preclinical treatment and diagnosis of a wide range of diseases including cancers and tumors. The current arsenal of NIR compounds are most constituted by organic dyes, polymers, inorganic nanomaterials, whereas Ln molecular complexes explore an alternative approach to design NIR probes that are potentially bring new molecular toolkits into the biomedicine. In this review, NIR imaging agents are categorized according to their molecular sizes, constitution and the key properties and features of each class of compounds are briefly defined wherever possible. To better elucidate the features of Ln complexes, we provide a succinct understanding of sensitization process and molecular Ln luminescence at a mechanistic level, which may help to deliver new insights to design NIR imaging probes. Finally, we used our work on NIR ytterbium (Yb3+) probes as an example to raise awareness of exploring biologically relevant chemical space for lanthanide complexes as chemical entities for biological activity.
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Affiliation(s)
- Xin-Xin Peng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China
| | - Xiao-Fei Zhu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China; School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, PR China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China.
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8
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Ahmed Z, Mahiya K, Iftikhar K. Structures and pure near-infrared photophysics of erbium and ytterbium( iii) complexes incorporating fluorinated β-diketone and neutral unidentate ligands. NEW J CHEM 2020. [DOI: 10.1039/d0nj02059a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper reports on the synthesis, structures and pure near-infrared photophysical properties of low symmetry Er3+ and Yb3+ β-diketonate ternary complexes.
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Affiliation(s)
- Zubair Ahmed
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- India
| | - Kuldeep Mahiya
- Department of Chemistry
- F G M Government College
- Adampur, Mandi Adampur
- Hisar-125052
- India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- India
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9
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Salinas-Uber J, Barrios LA, Roubeau O, Aromí G. Two [Ln 4] molecular rings folded as compact tetrahedra. Dalton Trans 2020; 49:7182-7188. [DOI: 10.1039/d0dt01259a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A new highly photo-switchable ligand furnishes supramolecular tetrahedral nanomagnets with Ln(iii) ions (Ln = Dy, Tb). Intramolecular weak interactions define the conformation of the ligand, quenching the photochromic activity.
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Affiliation(s)
- Jorge Salinas-Uber
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Leoní A. Barrios
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institut of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB)
| | - Olivier Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA)
- CSIC and Universidad de Zaragoza
- Zaragoza
- Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institut of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB)
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10
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11
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Velasco V, Barrios LA, Schütze M, Roubeau O, Luis F, Teat SJ, Aguilà D, Aromí G. Controlled Heterometallic Composition in Linear Trinuclear [LnCeLn] Lanthanide Molecular Assemblies. Chemistry 2019; 25:15228-15232. [DOI: 10.1002/chem.201903829] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/08/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Verónica Velasco
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
| | - Leoní A. Barrios
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
| | - Mike Schütze
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Olivier Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA) CSIC and Universidad de Zaragoza Plaza San Francisco s/n 50009 Zaragoza Spain
| | - Fernando Luis
- Instituto de Ciencia de Materiales de Aragón (ICMA) CSIC and Universidad de Zaragoza Plaza San Francisco s/n 50009 Zaragoza Spain
| | - Simon J. Teat
- Advanced Light Source Berkeley Laboratory 1 Cyclotron Road Berkeley California 94720 USA
| | - David Aguilà
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
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12
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Ibrahim-Ouali M, Dumur F. Recent Advances on Metal-Based Near-Infrared and Infrared Emitting OLEDs. Molecules 2019; 24:E1412. [PMID: 30974838 PMCID: PMC6480698 DOI: 10.3390/molecules24071412] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/07/2019] [Accepted: 04/08/2019] [Indexed: 12/27/2022] Open
Abstract
During the past decades, the development of emissive materials for organic light-emitting diodes (OLEDs) in infrared region has focused the interest of numerous research groups as these devices can find interest in applications ranging from optical communication to defense. To date, metal complexes have been most widely studied to elaborate near-infrared (NIR) emitters due to their low energy emissive triplet states and their facile access. In this review, an overview of the different metal complexes used in OLEDs and enabling to get an infrared emission is provided.
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Affiliation(s)
| | - Frédéric Dumur
- Aix Marseille Univ, CNRS, ICR, UMR 7273, F-13397 Marseille, France.
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13
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Zhao B, Xie G, Wang H, Han C, Xu H. Simply Structured Near-Infrared Emitters with a Multicyano Linear Acceptor for Solution-Processed Organic Light-Emitting Diodes. Chemistry 2019; 25:1010-1017. [PMID: 30444072 DOI: 10.1002/chem.201805201] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Indexed: 01/31/2023]
Abstract
Near-infrared (NIR) organic light-emitting diodes (OLEDs) show great potential in a variety of applications including sensors, night vision, and information security. Despite the superiority of thermally activated delayed fluorescence (TADF) in 100 % exciton harvesting, the development of NIR TADF OLEDs is still a great challenge, especially in terms of solution-processing technology. In this work, a multicyano acceptor of 2-dicyanomethylene-3-cyano-4,5,5-trimethyl-2,5-dihydrofurance (TCF) with strong electron-withdrawing ability was employed to construct solution-processible NIR emitters, CzTCF and tBCzTCF, with the feature of donor-π-acceptor (D-π-A) structure. The significantly enhanced intermolecular charge transfer effects not only render the deep-red and NIR emissions of CzTCF and tBCzTCF films, respectively, but also lead to their typical TADF characteristics. Consequently, the nondoped solution-processed NIR OLED based on tBCzTCF was successfully demonstrated with the peak wavelength of 715 nm, which paves the way for developing NIR emitters without polycyclic aromatic cores and heavy-metal ions.
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Affiliation(s)
- Bingjie Zhao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P.R. China
| | - Guohua Xie
- Hubei Collaborative Innovation Centre for, Advanced Organic Chemical Materials &, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, 430072, P.R. China
| | - Huiqin Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P.R. China
| | - Chunmiao Han
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P.R. China
| | - Hui Xu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P.R. China
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14
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Zhang Z, Zhou Y, Li H, Gao T, Yan P. Visible light sensitized near-infrared luminescence of ytterbium via ILCT states in quadruple-stranded helicates. Dalton Trans 2019; 48:4026-4034. [DOI: 10.1039/c9dt00614a] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Quadruple-stranded helicates show visible light sensitized near-infrared luminescence of ytterbium via ILCT states.
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Affiliation(s)
- Zihan Zhang
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education
- P. R. China
- School of Chemistry and Materials Science
- Heilongjiang University
| | - Yanyan Zhou
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education
- P. R. China
- School of Chemistry and Materials Science
- Heilongjiang University
| | - Hongfeng Li
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education
- P. R. China
- School of Chemistry and Materials Science
- Heilongjiang University
| | - Ting Gao
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education
- P. R. China
- School of Chemistry and Materials Science
- Heilongjiang University
| | - Pengfei Yan
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education
- P. R. China
- School of Chemistry and Materials Science
- Heilongjiang University
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Aguilà D, Velasco V, Barrios LA, González-Fabra J, Bo C, Teat SJ, Roubeau O, Aromí G. Selective Lanthanide Distribution within a Comprehensive Series of Heterometallic [LnPr] Complexes. Inorg Chem 2018; 57:8429-8439. [PMID: 29969253 DOI: 10.1021/acs.inorgchem.8b01112] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The preparation of heterometallic, lanthanide-only complexes is an extremely difficult synthetic challenge. By a ligand-based strategy, a complete isostructural series of dinuclear heterometallic [LnPr] complexes has been synthesized and structurally characterized. The two different coordination sites featured in this molecular entity allow study of the preferences of the praseodymium ion for a specific position depending on the ionic radii of the accompanying lanthanide partner. The purity of each heterometallic moiety has been evaluated in the solid state and in solution by means of crystallographic and spectrometric methods, respectively, revealing the limits of this strategy for ions with similar sizes. DFT calculations have been carried out to support the experimental results, confirming the nature of the site-selective lanthanide distribution. The predictable selectivity of this system has been exploited to assess the magnetic properties of the [DyPr] and [LuPr] derivatives, showing that the origin of the slow dynamics observed in the former arises from the dysprosium ion.
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Affiliation(s)
- David Aguilà
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
| | - Verónica Velasco
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
| | - Leoní A Barrios
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
| | - Joan González-Fabra
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| | - Simon J Teat
- Advanced Light Source, Berkeley Laboratory , 1 Cyclotron Road , Berkeley , California 94720 , United States
| | - Olivier Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA) , CSIC and Universidad de Zaragoza , Plaza San Francisco s/n , 50009 , Zaragoza , Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
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Hao Z, Meng F, Wang P, Wang Y, Tan H, Pei Y, Su S, Liu Y. Dual phosphorescence emission of dinuclear platinum(ii) complex incorporating cyclometallating pyrenyl-dipyridine-based ligand and its application in near-infrared solution-processed polymer light-emitting diodes. Dalton Trans 2018; 46:16257-16268. [PMID: 29138778 DOI: 10.1039/c7dt03282j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Two novel mono- and binuclear cyclometalated platinum(ii) complexes of (BuPyrDPy)Pt(dpm) and (BuPyrDPy)[Pt(dpm)]2 incorporating a pyrenyl-dipyridine-based cyclometalated ligand were synthesized and characterized, respectively. Single-crystal X-ray diffraction of the two materials revealed each complex's coordination mode; their photophysical, electrochemical as well as electroluminescent properties were also investigated. Both complexes exhibited good solubility and excellent thermal stability. (BuPyrDPy)[Pt(dpm)]2 presented dual phosphorescence emissive character at room-temperature and showed an increased quantum efficiency compared to that of (BuPyrDPy)Pt(dpm). Density functional theory (DFT) calculations were carried out to model their photophysical process, and found a significant contribution of the second Pt center to the LUMO plot, giving the T1 and T2 states considerable LMCT nature, which is quite rare in metallic complexes. A device with the structure of ITO/PEDOT (40 nm)/PVK : 30 wt% OXD-7 : 16 wt% (BuPyrDPy)[Pt(dpm)]2 (60 nm)/TPBI (30 nm)/Ba (4 nm)/Al (100 nm) showed a stable NIR emission peak at 695 nm accompanied by two shoulders at 599 nm and 762 nm, with a maximum external quantum efficiency (EQE) of 0.31% and a radiance of 26.9 mW cm-2, which are about 2 and 1.4 times higher than those of (BuPyrDPy)Pt(dpm)-doped devices. This study provides an efficient strategy to simultaneously design novel biluminescent materials and achieve NIR emission through adjusting the emissive triplet states by introducing a second metal into an asymmetric bimetallic system.
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Affiliation(s)
- Zhaoran Hao
- College of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, China.
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17
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Liu F, Hou T, Xu X, Sun L, Zhou J, Zhao X, Zhang S. Recent Advances in Nonfullerene Acceptors for Organic Solar Cells. Macromol Rapid Commun 2017; 39. [DOI: 10.1002/marc.201700555] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/24/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Fuchuan Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Tianyu Hou
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Xiangfei Xu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Liya Sun
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Jiawang Zhou
- Department of Chemistry; Johns Hopkins University; 3400 North Charles Street Baltimore MD 21218 USA
| | - Xingang Zhao
- Department of Materials Science and Engineering; Johns Hopkins University; 3400 North Charles Street Baltimore MD 21218 USA
| | - Shiming Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 P. R. China
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