1
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Kumar K, Sharma D, Thakur D, Karmakar A, Yang HW, Jayakumar J, Banik S, Jou JH, Ghosh S. Sterically Crowded Donor-Rich Imidazole Systems as Hole Transport Materials for Solution-Processed OLEDs. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5137-5150. [PMID: 38412064 DOI: 10.1021/acs.langmuir.3c03059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Imidazole, being an interesting dinitrogenic five-membered heterocyclic core, has been widely explored during the last several decades for developing various fascinating materials. Among the different domains where imidazole-based materials find wide applications, the area of optoelectronics has seen an overwhelming growth of functional imidazole derivatives developed through remarkable design and synthesis strategies. The present work reports a design approach for integrating bulky donor units at the four terminals of an imidazole core, leading to the development of sterically populated imidazole-based molecular platforms with interesting structural features. Rationally chosen starting substrates led to the incorporation of a bulky donor at the four terminals of the imidazole core. In addition, homo- and cofunctional molecular systems were synthesized through a suitable combination of initial ingredients. Our approach was extended to develop a series of four molecular systems, i.e., Cz3PhI, Cz4I, Cz3PzI, and TPA3CzI, containing carbazole, phenothiazine, and triphenylamine as known efficient donors at the periphery. Given their interesting structural features, three sterically crowded molecules (Cz4I, Cz3PzI, and TPA3CzI) were screened by using DFT and TD-DFT calculations to investigate their potential as hole transport materials (HTMs) for optoelectronic devices. The theoretical studies on several aspects including hole reorganization and exciton binding energies, ionization potential, etc., revealed their potential as possible candidates for the hole transport layer of OLEDs. Single-crystal analysis of Cz3PhI and Cz3PzI established interesting structural features including twisted geometries, which may help attain high triplet energy. Finally, the importance of theoretical predictions was established by fabricating two solution-process green phosphorescent OLED devices using TPA3CzI and Cz3PzI as HTMs. The fabricated devices exhibited good EQE/PE and CE of ∼15%/56 lm/W/58 cd/A and ∼13%/47 lm/W/50 cd/A, respectively, at 100 cd/m2.
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Affiliation(s)
- Krishan Kumar
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175075, India
| | - Dipanshu Sharma
- Department of Materials Science and Engineering, National Tsing Hua University 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan, R.O.C
| | - Diksha Thakur
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175075, India
| | - Anirban Karmakar
- Centro de Química Estrutural, Instituto Superior Técnico, Avenida Rosvisco Pais, Lisboa 1049-001, Portugal
| | - Hong-Wei Yang
- Department of Materials Science and Engineering, National Tsing Hua University 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan, R.O.C
| | - Jayachandran Jayakumar
- Department of Chemical Engineering, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan, R.O.C
| | - Subrata Banik
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu 613401, India
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering, National Tsing Hua University 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan, R.O.C
| | - Subrata Ghosh
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175075, India
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2
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Photo- and electro-luminescent properties of V-shaped bis-coumarin derivatives containing aromatic π‒conjugated imidazole moieties. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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Malatong R, Waengdongbung W, Nalaoh P, Chantanop N, Chasing P, Kaiyasuan C, Arunlimsawat S, Sudyoadsuk T, Promarak V. Deep-Blue Triplet-Triplet Annihilation Organic Light-Emitting Diode (CIE y ≈ 0.05) Using Tetraphenylimidazole and Benzonitrile Functionalized Anthracene/Chrysene Emitters. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248923. [PMID: 36558063 PMCID: PMC9787557 DOI: 10.3390/molecules27248923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Herein, new deep-blue triplet-triplet annihilation (TTA) molecules, namely 4-(10-(4-(1,4,5-triphenyl-1H-imidazol-2-yl)phenyl)anthracen-9-yl)benzonitrile (TPIAnCN) and 4-(12-(4-(1,4,5-triphenyl-1H-imidazol-2-yl)phenyl)chrysen-6-yl)benzonitrile (TPIChCN), are designed, synthesized, and investigated as emitters for organic light-emitting diodes (OLED). TPIAnCN and TPIChCN are composed of polyaromatic hydrocarbons of anthracene (An) and chrysene (Ch) as the cores functionalized with tetraphenylimidazole (TPI) and benzonitrile (CN) moieties, respectively. The experimental and theoretical results verify their excellent thermal properties, photophysical properties, as well as electrochemical properties. Particularly, their emissions are in the deep blue region, with TTA emissions being observed in their thin films. By utilization of these molecules as emitters, deep blue TTA OLEDs with CIE coordinates of (0.15, 0.05), high external quantum efficiency of 6.84%, and high exciton utilization efficiency (ηs) of 48% were fabricated. This result manifests the potential use of chrysene as an alternate building block to formulate new TTA molecules for accomplishing high-performance TTA OLEDs.
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Small Molecules Containing Amphoteric Imidazole Motifs as Sensitizers for Dye-Sensitized Solar Cells: An Overview. Top Curr Chem (Cham) 2022; 380:49. [PMID: 36123408 DOI: 10.1007/s41061-022-00404-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 08/15/2022] [Indexed: 10/14/2022]
Abstract
Organic dyes, porphyrins and inorganic complexes containing imidazole (IM) motifs have been demonstrated as a new class of sensitizers in dye-sensitized solar cells (DSSCs). Particularly, the amphoteric nature of IM-based motifs allows them to be used as donors (D), auxiliary donors (DA), linker/branch (π), or acceptors (A) in D-π-A-based organic dyes and porphyrins and also employed as cyclometalated heteroleptic and ancillary ligands in the Ru(II) and Ir(III) complexes for DSSCs. It is noteworthy that the introduction of IM chromophores in the dyes of D-π-A configuration can improve the light-harvesting properties and prohibit the charge recombination reactions due to the extension of the π-conjugated structures and hydrophobic nature. Similarly, in the case of inorganic complexes, the presence of IM motifs as ligands can improve the light-harvesting ability, give facilely tuned HOMO and LUMO energy levels, increase the charge recombination resistance and photostability. This results in enhanced photocurrent (JSC) and photovoltage (VOC) and consequently solar-to-power conversion efficiency (η) of DSSC devices based on Ru(II) and Ir(III) complexes. Considering the interesting DSSC applications of IM-derived molecules, in this review, we therefore comprehensively discuss their photophysical, electrochemical and photovoltaic properties reported so far and establish their structure-activity relationship to further advance the η of DSSCs. To the best of our knowledge, there is no such a review interpreting the importance of molecules possessing IM-motifs for DSSC applications to date.
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5
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Kim KM, Kim J, Kim J, Hong JI. Efficient blue organic electrochemiluminescence luminophore based on a pyrenyl-phenanthroimidazole conjugate. Chem Commun (Camb) 2022; 58:7542-7545. [PMID: 35703380 DOI: 10.1039/d2cc01762h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A pyrenyl-phenanthroimidazole (Py-PI) conjugate emitted strong blue electrochemiluminescence (ECL) emission via the reductive-oxidation co-reactant pathway, with an ECL efficiency 3.3 times higher than that of the 9,10-diphenylanthracene (DPA) reference compound.
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Affiliation(s)
- Kwang-Myeong Kim
- Department of Chemistry, College of National Sciences, Seoul National University, Seoul 08826, Korea.
| | - Jiwoo Kim
- Department of Chemistry, Research Institute for Basic Sciences, KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Korea.
| | - Joohoon Kim
- Department of Chemistry, Research Institute for Basic Sciences, KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Korea.
| | - Jong-In Hong
- Department of Chemistry, College of National Sciences, Seoul National University, Seoul 08826, Korea.
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6
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Li W, Chasing P, Nalaoh P, Chawanpunyawat T, Sukpattanacharoen C, Kungwan N, Sudyoadsuk T, Promarak V. Hydroxy‐Tetraphenylimidazole Derivatives as Efficient Blue Emissive Materials for Electroluminescent Devices. Chem Asian J 2022; 17:e202200266. [DOI: 10.1002/asia.202200266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/18/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Wan Li
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Thanyarat Chawanpunyawat
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | | | - Nawee Kungwan
- Department of Chemistry Faculty of Science Chiang Mai University Muang District 50200 Chiang Mai Thailand
| | - Taweesak Sudyoadsuk
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
- Research Network of NANOTEC-VISTEC on Nanotechnology for Energy Vidyasirimedhi Institute of Science and Technology 21210 Wangchan Rayong Thailand
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Girase JD, Kajjam AB, Dubey DK, Kishore Kesavan K, Jou JH, Vaidyanathan S. Unipolar 1-phenylimidazo[1,5-a]pyridine: A new class of ultra-bright sky blue emitters for solution-processed organic light emitting diodes. NEW J CHEM 2022. [DOI: 10.1039/d2nj01938h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three fluorophores based on Imidazo[1,5-a]pyridine (ImPy) decorated with aromatic π-system (C3 position of ImPy is decorated with naphthalene, methoxy-naphthalene and pyrene) were designed and synthesized by one-pot synthesis method. The...
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8
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Chawanpunyawat T, Chasing P, Nalaoh P, Maitarad P, Sudyodsuk T, Promarak V. Rational Design of Chrysene-Based Hybridized Local and Charge-Transfer Molecules as Efficient Non-Doped Deep-Blue Emitters for Simple-Structured Electroluminescent Devices. Chem Asian J 2021; 16:4145-4154. [PMID: 34716663 DOI: 10.1002/asia.202101154] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/29/2021] [Indexed: 01/12/2023]
Abstract
Herein, we present a molecular design of chrysene-based deep-blue emissive materials (TC, TpPC, TpXC, and TmPC), in which chrysene as a core is functionalized with different triphenylamine moieties to realize a fine-tuning deep-blue fluorescence with superior electroluminescent (EL) performance. The photophysical analyses and density functional theory (DFT) calculations disclose that TC, TpPC, and TpXC possess HLCT characteristics with intense deep-blue emission in the solid-state, good hole-transporting ability, and high thermal and electrochemical stabilities. They are successfully employed as non-doped emitters in simple structured OLEDs (ITO/PEDOT : PSS : NF/emitter/TPBi/LiF : Al). In particular, TC-based device emits a deep-blue light with an emission peak at 446 nm and CIE color coordinates of (0.148, 0.096), a maximum external quantum efficiency (EQEmax ) of 4.31%, and a low turn-on voltage of 2.8 V.
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Affiliation(s)
- Thanyarat Chawanpunyawat
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Phornphimon Maitarad
- Research Center of Nano Science and Technology, Shanghai University, Shanghai, 200444, P. R. China
| | - Taweesak Sudyodsuk
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.,Research Network of NANOTEC-VISTEC on Nanotechnology for Energy School of Molecular Science and Engineering Department, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
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9
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Mayder DM, Tonge CM, Nguyen GD, Tran MV, Tom G, Darwish GH, Gupta R, Lix K, Kamal S, Algar WR, Burke SA, Hudson ZM. Polymer Dots with Enhanced Photostability, Quantum Yield, and Two-Photon Cross-Section using Structurally Constrained Deep-Blue Fluorophores. J Am Chem Soc 2021; 143:16976-16992. [PMID: 34618454 DOI: 10.1021/jacs.1c06094] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Semiconducting polymer dots (Pdots) have emerged as versatile probes for bioanalysis and imaging at the single-particle level. Despite their utility in multiplexed analysis, deep blue Pdots remain rare due to their need for high-energy excitation and sensitivity to photobleaching. Here, we describe the design of deep blue fluorophores using structural constraints to improve resistance to photobleaching, two-photon absorption cross sections, and fluorescence quantum yields using the hexamethylazatriangulene motif. Scanning tunneling microscopy was used to characterize the electronic structure of these chromophores on the atomic scale as well as their intrinsic stability. The most promising fluorophore was functionalized with a polymerizable acrylate handle and used to give deep-blue fluorescent acrylic polymers with Mn > 18 kDa and Đ < 1.2. Nanoprecipitation with amphiphilic polystyrene-graft-(carboxylate-terminated poly(ethylene glycol)) gave water-soluble Pdots with blue fluorescence, quantum yields of 0.81, and molar absorption coefficients of (4 ± 2) × 108 M-1 cm-1. This high brightness facilitated single-particle visualization with dramatically improved signal-to-noise ratio and photobleaching resistance versus an unencapsulated dye. The Pdots were then conjugated with antibodies for immunolabeling of SK-BR3 human breast cancer cells, which were imaged using deep blue fluorescence in both one- and two-photon excitation modes.
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Affiliation(s)
- Don M Mayder
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Christopher M Tonge
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Giang D Nguyen
- Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Michael V Tran
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Gary Tom
- Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Rupsa Gupta
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Kelsi Lix
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Saeid Kamal
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - W Russ Algar
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Sarah A Burke
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada.,Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Zachary M Hudson
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
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10
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Kaiyasuan C, Chasing P, Nalaoh P, Wongkaew P, Sudyoadsuk T, Kongpatpanich K, Promarak V. Twisted Phenanthro[9,10-d]imidazole Derivatives as Non-doped Emitters for Efficient Electroluminescent Devices with Ultra-Deep Blue Emission and High Exciton Utilization Efficiency. Chem Asian J 2021; 16:2328-2337. [PMID: 34184404 DOI: 10.1002/asia.202100559] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/28/2021] [Indexed: 01/26/2023]
Abstract
Herein, two deep-blue emissive molecules (SAF-PI and SAF-DPI) are designed and synthesized using spiro[acridine-9,9'-fluorene] as a donor (D) substituted with 2-(3-methylphenyl)-1-phenyl-phenanthro[9,10-d]imidazole as an acceptor (A), forming twisted D-A and A-D-A structures, respectively. The photophysical studies and density functional theory (DFT) calculations reveal that both molecules exhibit hybridized local excited and charge transfer (HLCT) characteristics with deep blue emission color. They are effectively applied as non-doped emitters in OLEDs. Particularly, SAF-PI-based device achieves the high-definition television (HDTV) standard blue color emission peaked at 428 nm with CIE coordinate of (0.156, 0.053), a narrow full width at half maximum of 55 nm, a maximum external quantum efficiency (EQEmax ) of 4.57% and an exciton utilization efficiency of 65%.
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Affiliation(s)
- Chokchai Kaiyasuan
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Praweena Wongkaew
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Taweesak Sudyoadsuk
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Kanokwan Kongpatpanich
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.,Research Network of, NANOTEC-VISTEC on Nanotechnology for Energy Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
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11
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Abstract
Near ultraviolet (NUV) light-emitting materials and devices are significant due to unique applications in anti-counterfeit, manufacturing industries, and hygienic treatments. However, the development of high-efficiency NUV electroluminescent devices encounters great challenges and is far behind their RGB emitter counterparts. Besides the photoluminescence quantum yields (PLQYs) of NUV materials being higher than 40%, charge injection and lopsided carrier transport also determine the device performance, leading to great efforts in optimizing the frontier molecular orbitals to fit the adjacent function layer. In the exploration of NUV materials, organic molecules are one of the primary candidates, given their preparative facility and structural variability. Recently, all-inorganic quantum-dot light-emitting diodes (QLEDs) of Cd-based, ZnSe, graphene and inorganic perovskite emitters and organic-inorganic hybrid lead halide perovskite nanocrystals (NCs) were demonstrated for achieving NUV electroluminescence. Owing to the great efforts devoted to NUV material engineering and device configuration, NUV materials and devices have achieved great advances over the last two decades. In this review, we retrospect the development of NUV materials and devices covering all promising systems, which may inspire the enthusiasm of researchers to explore the huge potential in the NUV region.
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Affiliation(s)
- Shuo Chen
- 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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12
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Shanmugasundaram K, Been H, John JC, Puthanveedu A, Pharm NNT, Lee SG, Choe Y. Simple luminescent phenanthroimidazole emitters for solution-processed non-doped organic light-emitting electrochemical cells. NEW J CHEM 2021. [DOI: 10.1039/d1nj02811a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organic luminescent materials with leveraging properties have attracted urgent demand for their commercial application in lighting devices.
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Affiliation(s)
- Kanagaraj Shanmugasundaram
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - HyeIn Been
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Jino C. John
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Archana Puthanveedu
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Nguyet N. T. Pharm
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Seung Geol Lee
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
- Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Youngson Choe
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
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13
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Han P, Lin C, Ma D, Qin A, Tang BZ. Violet-Blue Emitters Featuring Aggregation-Enhanced Emission Characteristics for Nondoped OLEDs with CIEy Smaller than 0.046. ACS APPLIED MATERIALS & INTERFACES 2020; 12:46366-46372. [PMID: 32955848 DOI: 10.1021/acsami.0c12722] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
High emission efficiency and finite molecular conjugation in the aggregate state are two desirable features in violet-blue emitters. Aggregation-induced emission luminogens (AIEgens) have emerged as promising luminescent materials that offer these features. Herein, we report the design and synthesis of a group of violet-blue tetraphenylbenzene-based AIEgens with photoluminescence quantum yields over 98% in their film states. When utilizing these AIEgens as nondoped emitting layers, the fabricated organic light-emitting diode exhibits a maximum external quantum efficiency of 4.34% with Commission Internationale de L'Eclairage (CIE) coordinates of (0.159, 0.035), which is amenable to the next-generation ultrahigh-definition television (UHDTV) display standard.
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Affiliation(s)
- Pengbo Han
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, Center for Aggregation-Induced Emission, South China University of Technology (SCUT), Guangzhou 510640, China
| | - Chengwei Lin
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, Center for Aggregation-Induced Emission, South China University of Technology (SCUT), Guangzhou 510640, China
| | - Dongge Ma
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, Center for Aggregation-Induced Emission, South China University of Technology (SCUT), Guangzhou 510640, China
| | - Anjun Qin
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, Center for Aggregation-Induced Emission, South China University of Technology (SCUT), Guangzhou 510640, China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, Center for Aggregation-Induced Emission, South China University of Technology (SCUT), Guangzhou 510640, China
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China
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14
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Chanawungmuang N, Sukwattanasinitt M, Rashatasakhon P. Fluorescence Sensors for Bismuth (III) Ion from Pyreno[4,5-d]imidazole Derivatives. Photochem Photobiol 2020; 97:301-308. [PMID: 32898925 DOI: 10.1111/php.13331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 09/02/2020] [Indexed: 11/30/2022]
Abstract
Three pyreno[4,5-d]imidazole derivatives are synthesized and evaluated as fluorescent sensors for bismuth (III) ion. The target compounds are prepared in 55-86% yields from a condensation reaction between pyrene-4,5-dione and aromatic aldehydes. The compound bearing a phenolic group can selectively detect bismuth (III) ion via fluorescence enhancement with a detection limit of 1.20 μm in CH3 CN-DMSO mixture and 3.40 μm in 10% pH5 aqueous in CH3 CN-DMSO mixture. The sensing mechanism involving a formation of coordination complex is investigated by UV-VIS and fluorescence titrations, 1 H-NMR and the decomplexation of the bismuth complex by sulfide ion. The application of this sensor for quantitative analysis of spiked bismuth (III) ion in real water samples from two different sources is demonstrated.
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Affiliation(s)
- Nichapa Chanawungmuang
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Mongkol Sukwattanasinitt
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.,Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Paitoon Rashatasakhon
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.,Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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15
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Liu D, Wei JY, Tian WW, Jiang W, Sun YM, Zhao Z, Tang BZ. Endowing TADF luminophors with AIE properties through adjusting flexible dendrons for highly efficient solution-processed nondoped OLEDs. Chem Sci 2020; 11:7194-7203. [PMID: 33033608 PMCID: PMC7499814 DOI: 10.1039/d0sc02194f] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 06/15/2020] [Indexed: 12/20/2022] Open
Abstract
The amalgamation of thermally activated delayed fluorescence (TADF) and aggregation-induced emission (AIE) properties, termed AIE-TADF, is a promising strategy to design novel robust luminescent materials. Herein, we transform 2,3,4,5,6-penta(9H-carbazol-9-yl)benzonitrile (5CzBN) from an ACQ molecule into an AIEgen by simply decorating the 5CzBN core with alkyl chain-linked spirobifluorene dendrons. By increasing the number of flexible dendrons, these materials can not only show obvious AIE-TADF characteristics and uniform film morphology, but can also exhibit better resistance to isopropyl alcohol, which are beneficial to fully solution-processed OLEDs. Notably, 5CzBN-PSP shows great device efficiency with an external quantum efficiency (EQE), current efficiency and power efficiency of 20.1%, 58.7 cd A-1 and 46.2 lm W-1, respectively and achieved record-breaking efficiency in solution-processed nondoped OLEDs based on AIE emitters. This work demonstrates a general approach to explore new efficient emitters by the marriage of AIE and TADF which could potentially improve their performance in various areas.
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Affiliation(s)
- Dan Liu
- Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research , Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device , School of Chemistry and Chemical Engineering , Southeast University , Nanjing , 211189 , China .
| | - Jing Yi Wei
- Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research , Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device , School of Chemistry and Chemical Engineering , Southeast University , Nanjing , 211189 , China .
| | - Wen Wen Tian
- Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research , Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device , School of Chemistry and Chemical Engineering , Southeast University , Nanjing , 211189 , China .
| | - Wei Jiang
- Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research , Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device , School of Chemistry and Chemical Engineering , Southeast University , Nanjing , 211189 , China .
| | - Yue Ming Sun
- Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research , Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device , School of Chemistry and Chemical Engineering , Southeast University , Nanjing , 211189 , China .
| | - Zheng Zhao
- Department of Chemistry , Hong Kong Branch of Chinese National Engineering Research, Center for Tissue Restoration and Reconstruction , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China .
| | - Ben Zhong Tang
- Department of Chemistry , Hong Kong Branch of Chinese National Engineering Research, Center for Tissue Restoration and Reconstruction , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China .
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16
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Agren S, Chaabene M, Allouche A, Ben Chaâbane R, Lahcinie M, Baouab MHV. Blue Highly Fluorescent Boranil Derived From Anil Ligand: Synthesis, Characterization, Experimental and Theoretical Evaluation of Solvent Effect on Structures and Photophysical Properties. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5764] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Soumaya Agren
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of MonastirUniversity of Monastir Avenue of the Environment Monastir 5000 Tunisia
| | - Marwa Chaabene
- Laboratory of Advanced Materials and Interfaces (LIMA), Faculty of Sciences of MonastirUniversity of Monastir Avenue of the Environment Monastir 5000 Tunisia
| | - Abdul‐Rahman Allouche
- Institute of Light and MatterUMR5306 University of Lyon 1‐CNRS, University of Lyon cedex Villeurbanne 69622 France
| | - Rafik Ben Chaâbane
- Laboratory of Advanced Materials and Interfaces (LIMA), Faculty of Sciences of MonastirUniversity of Monastir Avenue of the Environment Monastir 5000 Tunisia
| | - Mohamed Lahcinie
- Laboratory of organometallic and macromolecular chemistry‐composites Materials, Faculty of Sciences and TechnologiesCadi Ayyad University Avenue Abdelhakim Elkhattabi, BP549 Marrakech 40000 Morocco
- Mohamed VI Polytechnic University Lot 660,Hay Moulay Rachid Ben Guerir 43150 Morocco
| | - Mohamed Hassen V Baouab
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of MonastirUniversity of Monastir Avenue of the Environment Monastir 5000 Tunisia
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17
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Sonalin S, Kurlekar K, Anjali A, Imran PM, Nagarajan S. Synthesis of Phenanthro[9,10‐
d
]imidazoles and their Potential Applications in Solution Processable Bottom‐Gated OFETs. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Srinita Sonalin
- Department of ChemistryCentral University of Tamil Nadu Thiruvarur 610 005 India
| | - Komal Kurlekar
- Department of ChemistryCentral University of Tamil Nadu Thiruvarur 610 005 India
| | - Anshika Anjali
- Department of ChemistryCentral University of Tamil Nadu Thiruvarur 610 005 India
| | | | - Samuthira Nagarajan
- Department of ChemistryCentral University of Tamil Nadu Thiruvarur 610 005 India
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18
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Karthik S, Ajantha J, Easwaramoorthi S, Gandhi T. Pyrenoimidazole-fused phenanthridine derivatives with intense red excimer fluorescence in the solid state. NEW J CHEM 2020. [DOI: 10.1039/d0nj01223h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new series of polycyclic aromatic hydrocarbons (PAHs), namely, various pyrene-fused phenanthridines PyFPs having different substituents were developed as fluorescent emitters for optoelectronic applications.
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Affiliation(s)
- Shanmugam Karthik
- Department of Chemistry
- School of Advanced Sciences
- Vellore Institute of Technology
- Vellore
- India
| | - Joseph Ajantha
- Inorganic & Physical Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600020
- India
- University of Madras
| | - Shanmugam Easwaramoorthi
- Inorganic & Physical Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600020
- India
| | - Thirumanavelan Gandhi
- Department of Chemistry
- School of Advanced Sciences
- Vellore Institute of Technology
- Vellore
- India
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19
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Synthesis and application of a novel 9,9-diethyl-1,2-diaryl-1,9-dihydrofluoreno[2,3-d]imidazole for blue organic light emitting diode. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.05.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Usta H, Alimli D, Ozdemir R, Dabak S, Zorlu Y, Alkan F, Tekin E, Can A. Highly Efficient Deep-Blue Electroluminescence Based on a Solution-Processable A-π-D-π-A Oligo( p-phenyleneethynylene) Small Molecule. ACS APPLIED MATERIALS & INTERFACES 2019; 11:44474-44486. [PMID: 31609580 DOI: 10.1021/acsami.9b12971] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of solution-processable fluorescent small molecules with highly efficient deep-blue electroluminescence is of growing interest for organic light-emitting diode (OLED) applications. However, high-performance deep-blue fluorescent emitters with external quantum efficiencies (EQEs) over 5% are still scarce in OLEDs. Herein, a novel highly soluble oligo(p-phenyleneethynylene)-based small molecule, 1,4-bis((2-cyanophenyl)ethynyl)-2,5-bis(2-ethylhexyloxy)benzene (2EHO-CNPE), is designed, synthesized, and fully characterized as a wide band gap (2.98 eV) and highly fluorescent (ΦPL = 0.90 (solution) and 0.51 (solid-state)) deep-blue emitter. The new molecule is functionalized with cyano (-CN)/2-ethylhexyloxy (-OCH2CH(C2H5)C4H9) electron-withdrawing/-donating substituents, and ethynylene is used as a π-spacer to form an acceptor (A)-π-donor (D)-π-acceptor (A) molecular architecture with hybridized local and charge transfer (HLCT) excited states. Physicochemical and optoelectronic characterizations of the new emitter were performed in detail, and the single-crystal structure was determined. The new molecule adopts a nearly coplanar π-conjugated framework packed via intermolecular "C-H···π" and "C-H···N" hydrogen bonding interactions without any π-π stacking. The OLED device based on 2EHO-CNPE shows an EQEmax of 7.06% (EQE = 6.30% at 200 cd/m2) and a maximum current efficiency (CEmax) of 5.91 cd/A (CE = 5.34 cd/A at 200 cd/m2) with a deep-blue emission at CIE of (0.15, 0.09). The electroluminescence performances achieved here are among the highest reported to date for a solution-processed deep-blue fluorescent small molecule, and, to the best of our knowledge, it is the first time that a deep-blue OLED is reported based on the oligo(p-phenyleneethynylene) π-framework. TDDFT calculations point to facile reverse intersystem crossing (RISC) processes in 2EHO-CNPE from high-lying triplet states to the first singlet excited state (T2/T3 → S1) (hot-exciton channels) that enable a high radiative exciton yield (ηr ∼ 69%) breaking the theoretical limit of 25% in conventional fluorescent OLEDs. These results demonstrate that properly designed fluorescent oligo(p-phenyleneethynylenes) can be a key player in high-performance deep-blue OLEDs.
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Affiliation(s)
- Hakan Usta
- Department of Materials Science and Nanotechnology Engineering , Abdullah Gül University , 38080 Kayseri , Turkey
| | - Dilek Alimli
- Department of Chemistry , Gebze Technical University , 41400 Gebze , Kocaeli , Turkey
| | - Resul Ozdemir
- Department of Materials Science and Nanotechnology Engineering , Abdullah Gül University , 38080 Kayseri , Turkey
| | - Salih Dabak
- The Scientific and Technological Research Council of Turkey (TUBITAK)-Marmara Research Center (MAM) , 41470 Gebze , Kocaeli , Turkey
| | - Yunus Zorlu
- Department of Chemistry , Gebze Technical University , 41400 Gebze , Kocaeli , Turkey
| | - Fahri Alkan
- Department of Materials Science and Nanotechnology Engineering , Abdullah Gül University , 38080 Kayseri , Turkey
| | - Emine Tekin
- The Scientific and Technological Research Council of Turkey (TUBITAK)-Marmara Research Center (MAM) , 41470 Gebze , Kocaeli , Turkey
| | - Ayse Can
- Department of Materials Science and Nanotechnology Engineering , Abdullah Gül University , 38080 Kayseri , Turkey
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21
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Synthesis and Configurational Character Study of Novel Structural Isomers Based on Pyrene-Imidazole. Molecules 2019; 24:molecules24122293. [PMID: 31226827 PMCID: PMC6630678 DOI: 10.3390/molecules24122293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 06/18/2019] [Accepted: 06/18/2019] [Indexed: 11/25/2022] Open
Abstract
Isomers provide more possibilities for the structure of organic compounds. Molecular structures determine their corresponding properties, therefore the intrinsic relationship between structure and properties of isomers is of great research value. Isomers with a stable structure and excellent performance possess more potential for development and application. In this paper, we design and synthesize structural isomers with different molecular symmetries based on the asymmetric structure of imidazole and the symmetrical structure of pyrene. Isomers with stable molecular structures can be obtained by a simple and efficient “one-pot” reaction, involving axisymmetric configuration and centrosymmetric configuration. Using this “click-like” reaction, the structure of target molecules is controllable and adjustable. Furthermore, the effect of molecular configurations on molecular stacking of crystal is studied. The variation of the optical and thermal properties, the optimized structures, and orbital distributions of isomers depends on different molecular geometry with different symmetry, which are revealed by crystallographic analysis. This present strategy provides an efficient synthetic method for the design and synthesis of structural isomers based on pyrene–imidazole.
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22
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Tagare J, Dubey DK, Jou J, Vaidyanathan S. Near UV/Deep‐Blue Phenanthroimidazole‐Based Luminophores for Organic Light‐Emitting Diodes: Experimental and Theoretical Investigation. ChemistrySelect 2019. [DOI: 10.1002/slct.201900383] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jairam Tagare
- Optoelectronics laboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
| | - Deepak Kumar Dubey
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu Taiwan- 30013
| | - Jwo‐Huei Jou
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu Taiwan- 30013
| | - Sivakumar Vaidyanathan
- Optoelectronics laboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
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23
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Wei X, Liu Y, Hu T, Li Z, Liu J, Wang R, Gao H, Hu X, Liu G, Wang P, Lee CS, Wang Y. Design of Efficient Exciplex Emitters by Decreasing the Energy Gap Between the Local Excited Triplet ( 3LE) State of the Acceptor and the Charge Transfer (CT) States of the Exciplex. Front Chem 2019; 7:188. [PMID: 31024884 PMCID: PMC6465540 DOI: 10.3389/fchem.2019.00188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 03/11/2019] [Indexed: 11/13/2022] Open
Abstract
A series of thermally activated delayed fluorescence (TADF) exciplex based on the TX-TerPy were constructed. The electronic coupling between the triplet local excited states (3LE) of the donors and acceptor and the charge transfer states had a great influence on the triplet exciton harvesting and ΦPL. Herein, based on this strategy, three donor molecules TAPC, TCTA, and m-MTDATA were selected. The local triplet excited state (3LE) of the three donors are 2.93, 2.72 and 2.52 eV in pure films. And the 3LE of TX-TerPy is 2.69 eV in polystyrene film. The energy gap between the singlet charge transfer (1CT) states of TAPC:TX-TerPy (7:1), TCTA:TX-TerPy (7:1) and the 3LE of TX-TerPy are 0.30 eV and 0.20 eV. Finally, the ΦPL of TAPC:TX-TerPy (7:1) and TCTA:TX-TerPy (7:1) are 65.2 and 69.6%. When we changed the doping concentration of the exciplex from 15% to 50%, the ratio of the triplet decreased, and ΦPL decreased by half, perhaps due to the increased energy gap between 1CT and 3LE. Therefore, optimizing the 1CT, 3CT, and 3LE facilitated the efficient exciplex TADF molecules.
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Affiliation(s)
- Xiaofang Wei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Yanwei Liu
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, China.,Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Taiping Hu
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, China.,Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Zhiyi Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Jianjun Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Ruifang Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Honglei Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoxiao Hu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Guanhao Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Pengfei Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong, Hong Kong
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
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24
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Liu F, Tao Y, Li J, Liu H, He X, Du C, Tang X, Lu P. Efficient Non‐doped Blue Fluorescent Organic Light‐Emitting Diodes Based on Anthracene–Triphenylethylene Derivatives. Chem Asian J 2019; 14:1004-1012. [DOI: 10.1002/asia.201801867] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/21/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Futong Liu
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Yanchun Tao
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Jinyu Li
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Hui Liu
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Xin He
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Chunya Du
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Xiangyang Tang
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Ping Lu
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
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25
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Do TT, Chavhan S, Subbiah J, Ou TH, Manzhos S, Jones D, Bell JM, Jou JH, Sonar P. Naphthalimide end-capped diphenylacetylene: a versatile organic semiconductor for blue light emitting diodes and a donor or an acceptor for solar cells. NEW J CHEM 2019. [DOI: 10.1039/c8nj06496b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A novel compound NAI-PVP-NAI was utilized as a blue emissive layer for organic light emitting diodes and as an acceptor and a donor for organic solar cells.
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Affiliation(s)
- Thu-Trang Do
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Sudam Chavhan
- Department of Materials Science and Engineering
- National Tsing-Hua University
- Hsinchu-30013
- Taiwan
| | - Jegadesan Subbiah
- School of Chemistry
- University of Melbourne
- Bio21 Institute
- Parkville
- Australia
| | - Tsu-Hao Ou
- Department of Materials Science and Engineering
- National Tsing-Hua University
- Hsinchu-30013
- Taiwan
| | - Sergei Manzhos
- Centre Énergie Matériaux Télécommunications
- Institut National de la Recherche Scientifique
- Varennes QC J3X1S2
- Canada
| | - David Jones
- School of Chemistry
- University of Melbourne
- Bio21 Institute
- Parkville
- Australia
| | - John M. Bell
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering
- National Tsing-Hua University
- Hsinchu-30013
- Taiwan
| | - Prashant Sonar
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
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26
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Tabasi Z, Younes EA, Walsh JC, Thompson DW, Bodwell GJ, Zhao Y. Pyrenoimidazolyl-Benzaldehyde Fluorophores: Synthesis, Properties, and Sensing Function for Fluoride Anions. ACS OMEGA 2018; 3:16387-16397. [PMID: 31458274 PMCID: PMC6644017 DOI: 10.1021/acsomega.8b02482] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 11/19/2018] [Indexed: 06/01/2023]
Abstract
Two structural isomers of (9H-pyreno[4,5-d]imidazol-10-yl)-benzaldehyde, with para and meta substitution patterns, were synthesized by condensation of 4,5-pyrenedione with terephthalaldehyde and isophthalaldehyde, respectively. These new pyrenoimidazole derivatives were characterized by single-crystal X-ray crystallography, UV-vis absorption spectroscopy, fluorescence spectroscopy, and cyclic voltammetry to elucidate their structural, solid-state packing, and electronic properties. Interactions of these compounds with fluoride anions in polar organic solvents (acetone and dimethyl sulfoxide) were investigated by NMR, UV-vis, and fluorescence techniques in conjunction with density functional theory calculations. UV-vis analysis showed that the binding of the two pyrenoimidazolyl benzaldehydes with fluoride anions resulted in significant colorimetric responses, while fluorescence studies showed that the para-pyrenoimidazolyl benzaldehyde behaved as an intramolecular charge transfer fluorescent probe, exhibiting ratiometric sensing performance to efficiently detect and quantify fluoride anions at the sub-millimolar level.
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Affiliation(s)
- Zahra
A. Tabasi
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador A1B 3X7, Canada
| | - Eyad A. Younes
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador A1B 3X7, Canada
- Department
of Chemistry, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan
| | - Joshua C. Walsh
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador A1B 3X7, Canada
| | - David W. Thompson
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador A1B 3X7, Canada
| | - Graham J. Bodwell
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador A1B 3X7, Canada
| | - Yuming Zhao
- Department
of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland
and Labrador A1B 3X7, Canada
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27
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Gong X, Zheng C, Feng X, Huan Y, Li J, Yi M, Fu Z, Huang W, Gao D. 1,8-Substituted Pyrene Derivatives for High-Performance Organic Field-Effect Transistors. Chem Asian J 2018; 13:3920-3927. [DOI: 10.1002/asia.201801408] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/18/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaojie Gong
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Chaoyue Zheng
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Xingcui Feng
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Yihong Huan
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Jiewei Li
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Mingdong Yi
- Key Laboratory for Organic Electronics; Information Displays and Institute of Advanced Materials; Nanjing University of Posts and Telecommunications; 9 Wenyuan Road Nanjing 210003 P. R. China
| | - Zhenqian Fu
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Wei Huang
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Deqing Gao
- Jiangsu National Synergistic Innovation Centre for Advanced Materials (SICAM); Key Laboratory of Flexible Electronics (KLOFE) and; Institute of Advanced Materials (IAM); Nanjing Tech University; 30 South Puzhu Road Nanjing 211816 P. R. China
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Khan SA, Asiri AM, Al-Dies AAM, Osman OI, Asad M, Zayed ME. One-pot synthesis, physicochemical and photophysical properties of deep blue light-emitting highly fluorescent pyrene-imidazole dye: A combined experimental and theoretical study. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.06.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Konidena RK, Thomas KRJ, Pathak A, Dubey DK, Sahoo S, Jou JH. Tuning the Photophysical and Electroluminescence Properties in Asymmetrically Tetrasubstituted Bipolar Carbazoles by Functional Group Disposition. ACS APPLIED MATERIALS & INTERFACES 2018; 10:24013-24027. [PMID: 29931980 DOI: 10.1021/acsami.8b04566] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbazoles decorated with both donor and acceptor fragments offer a classical way to optimize bipolar functional properties. In this work, a series of carbazoles featuring triphenylamine donors and cyano acceptors are synthesized and their structure-property relationship is studied. The effects of connectivity and the chromophore number density on photophysical and electroluminescence properties are investigated. The position of the triphenylamine donor on the 3,6-dicyanocarbazole nucleus significantly affected the photophysical and electroluminescence properties. The dye possessing triphenylamine on C2 and C7 displayed a red shift in absorption when compared with the structural analogue with triphenylamine tethered to C1 and C8. The emission wavelength of the dyes are tunable from blue to green, by altering the position of triphenylamine and cyano substituents. All of the dyes exhibited positive solvatochromism in emission, attributable to the photoinduced intramolecular charge transfer from the triphenylamine donor to the cyano acceptor. However, the extent of charge transfer and hybridization of local and charge-transfer-excited states is highly dependent on the position of triphenylamine and cyano groups on the carbazole nucleus. Dyes containing cyano substituents at C2 and C7 showed a prolonged excited state lifetime, broad emission, and large Stokes shifts, indicating the presence of a higher charge transfer component in the excited state. The dyes displayed exceptional thermal stability with the onset decomposition temperature (10% weight loss) > 350 °C. Electrochemical measurements revealed low oxidation potential for dyes containing triphenylamine at C3 and/or C6. Addition of a cyano acceptor on carbazole led to the stabilization of lowest unoccupied molecular orbital. Furthermore, the materials were tested as emitting dopants in solution-processable multilayer organic light emitting diodes and found to display deep-blue/sky-blue electroluminescence with external quantum efficiency as high as 6.5% for a deep-blue emitter (CIE y ∼ 0.06).
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Affiliation(s)
- Rajendra Kumar Konidena
- Organic Materials Laboratory, Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247 667 , India
| | - K R Justin Thomas
- Organic Materials Laboratory, Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247 667 , India
| | - Ambika Pathak
- Organic Materials Laboratory, Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247 667 , India
| | - Deepak Kumar Dubey
- Department of Material Science and Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | - Snehasis Sahoo
- Department of Material Science and Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | - Jwo-Huei Jou
- Department of Material Science and Engineering , National Tsing Hua University , Hsinchu 30013 , Taiwan
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30
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Islam A, Zhang D, Hong L, Cui H, Wei Q, Duan L, Peng R, Ouyang X, Ge Z. Efficient deep blue emitter based on the integration of phenanthroimidazole, triphenylamine and tetraphenylethene for organic light emitting devices. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Jayabharathi J, Ramya R, Thanikachalam V, Nethaji P. Optical and electroluminescent performances of dihydrobenzodioxin phenanthroimidazoles based blue-emitting materials. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.02.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Huang X, Tian J, Xu F, Liu X, Li Y, Guo Y, Chu W, Sun Z. Novel π-conjugated molecules based on diimidazopyridine: Significantly improved the photophysical, thermal and electrochemical properties bearing different aryl substituents. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Dong X, Wang S, Gui C, Shi H, Cheng F, Tang BZ. Synthesis, aggregation-induced emission and thermally activated delayed fluorescence properties of two new compounds based on phenylethene, carbazole and 9,9′,10,10′-tetraoxidethianthrene. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Jayabharathi J, Ramya R, Thanikachalam V, Nethaji P. Tailoring the molecular design of twisted dihydrobenzodioxin phenanthroimidazole derivatives for non-doped blue organic light-emitting devices. RSC Adv 2018; 8:29031-29043. [PMID: 35548015 PMCID: PMC9084391 DOI: 10.1039/c8ra05004j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/30/2018] [Indexed: 11/21/2022] Open
Abstract
Three fused polycyclic aryl fragments, namely, naphthyl, methoxynaphthyl, and pyrenyl have been used to construct blue-emissive phenanthroimidazole-functionalized target molecules, i.e., 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(naphthalen-1-yl)-1H-phenanthro[9,10-d]imidazole (1), 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(1-methoxynaphthalen-4-yl)-1H-phenanthro[9,10-d]imidazole (2), and 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-(pyren-10-yl)-1H-phenanthro[9,10-d]imidazole (3). The up-conversion of triplets to singlets via a triplet–triplet annihilation (TTA) process is dominant in these compounds due to 2ET1 > ES1. The pyrenyl dihydrobenzodioxin phenanthroimidazole (3)-based nondoped OLED exhibits blue emission (450 nm) with CIE (0.15, 0.14), a luminance of 53 890 cd m−2, power efficiency of 5.86 lm W−1, external quantum efficiency of 5.30%, and current efficiency of 6.90 cd A−1. The efficient device performance of pyrenyl dihydrobenzodioxin phenanthroimidazole is due to the TTA contribution to the electroluminescent process. Efficient blue emitters, 1-(2,3-dihydrobenzodioxinyl)-2-naphthylphenanthroimidazole, 1-(2,3-dihydrobenzodioxinyl)-2-methoxynaphthylphenanthroimidazole and 1-(2,3-dihydrobenzodioxinyl)-2-pyrenylphenanthroimidazole have been reported.![]()
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35
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Zhang Z, Zhang Z, Zhang H, Wang Y. 2-(2-Hydroxyphenyl)imidazole-based four-coordinate organoboron compounds with efficient deep blue photoluminescence and electroluminescence. Dalton Trans 2018; 47:127-134. [DOI: 10.1039/c7dt03702c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Four-coordinate organoboron compounds that can realize efficient electroluminescence with a CIE coordinate close to that of standard blue light (0.14, 0.08) have been developed.
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Affiliation(s)
- Zhenyu Zhang
- State Grid Shanxi Electric Power Research Institute
- Taiyuan 030001
- P. R. China
| | - Zuolun Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Hongyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yue Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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36
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Joseph V, Thomas KRJ, Singh M, Sahoo S, Jou JH. Manipulation of Donor-Acceptor Interactions in Carbazole-Based Emitters by Chromophore Choice To Achieve Near-UV Emission. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701285] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Vellaichamy Joseph
- Organic Materials Laboratory; Department of Chemistry; Indian Institute of Technology Roorkee; 247 667 Roorkee India
| | - K. R. Justin Thomas
- Organic Materials Laboratory; Department of Chemistry; Indian Institute of Technology Roorkee; 247 667 Roorkee India
| | - Meenu Singh
- Department of Materials science and engineering; National Tsing Hua University; 30013 Hsinchu Taiwan
| | - Snehasis Sahoo
- Department of Materials science and engineering; National Tsing Hua University; 30013 Hsinchu Taiwan
| | - Jwo-Huei Jou
- Department of Materials science and engineering; National Tsing Hua University; 30013 Hsinchu Taiwan
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37
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Liu S, Zhang X, Ou C, Wang S, Yang X, Zhou X, Mi B, Cao D, Gao Z. Structure-Property Study on Two New D-A Type Materials Comprising Pyridazine Moiety and the OLED Application as Host. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26242-26251. [PMID: 28708373 DOI: 10.1021/acsami.7b04859] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this paper, two new pyridazine based donor-acceptor type materials, i.e., 3CzPyaPy: 9,9'-(3-(6-(9H-carbazol-9-yl)pyridazin-3-yl)pyridine-2,6-diyl)bis(9H-carbazole) and 4CzPyPyaPy: 3,6-bis(2,6-di(9H-carbazol-9-yl)pyridin-3-yl)pyridazine, were synthesized with high yields. These two materials exhibited strong absorption/emission with high molar extinction coefficients and moderate photoluminescence quantum yield. The glass transition temperature of 3CzPyaPy was detected to be as high as 131 °C, showing its high thermal stability. Although the absorption energies and oxidation/reduction behaviors of the two materials were similar, the emission from 4CzPyPyaPy with longer effective-conjugation length presented hypsochromic shift both in films and in dilute solutions, contradicting to the common sense. The single crystal structure study disclosed their different space stretching and packing: 3CzPyaPy was twisted in larger angles and adopted dimerlike packing, while 4CzPyPyaPy showed smaller torsion angles and exhibited slipped herringbone packing. The dimerlike packing in 3CzPyaPy is responsible for its bathochromic shift of emission in solid state, while its unsymmetrical molecular structure accounts for that in solution. We believe that the unsymmetrical molecular structure of 3CzPyaPy is partially responsible for its high thermal-stability and also responsible for its HOMO dispersion which renders it slightly more difficult to oxidize. 3CzPyaPy was proved to be a bipolar-transport material and when served as a phosphor host, a green phosphorescent device achieved maximum efficiencies of 54.0 cd A-1, 42.4 lm W-1, and 17.7%, which are among the best with nonoptimized device structure, demonstrating its great potential for optoelectronic application. Furthermore, the new synthesized pyridazine derivatives and the corresponding structural and molecular-packing influences on material properties give a new insight into molecule tailoring.
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Affiliation(s)
- Shaojie Liu
- Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu Engineering Centre for Plate Displays & Solid State Lighting, and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Xunlu Zhang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu Engineering Centre for Plate Displays & Solid State Lighting, and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Changjin Ou
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech) , Nanjing 211816, China
| | - Shulei Wang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu Engineering Centre for Plate Displays & Solid State Lighting, and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Xinli Yang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), School of Material Science and Engineering, Nanjing University of Posts & Telecommunications , Nanjing, Jiangsu 211816, China
| | - Xinhui Zhou
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), School of Material Science and Engineering, Nanjing University of Posts & Telecommunications , Nanjing, Jiangsu 211816, China
| | - Baoxiu Mi
- Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu Engineering Centre for Plate Displays & Solid State Lighting, and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Dapeng Cao
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), School of Material Science and Engineering, Nanjing University of Posts & Telecommunications , Nanjing, Jiangsu 211816, China
| | - Zhiqiang Gao
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), School of Material Science and Engineering, Nanjing University of Posts & Telecommunications , Nanjing, Jiangsu 211816, China
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38
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Non-Doped Sky-Blue OLEDs Based on Simple Structured AIE Emitters with High Efficiencies at Low Driven Voltages. Chem Asian J 2017; 12:2189-2196. [DOI: 10.1002/asia.201700833] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Indexed: 12/26/2022]
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39
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Chen WC, Yuan Y, Ni SF, Tong QX, Wong FL, Lee CS. Achieving efficient violet-blue electroluminescence with CIE y <0.06 and EQE >6% from naphthyl-linked phenanthroimidazole-carbazole hybrid fluorophores. Chem Sci 2017; 8:3599-3608. [PMID: 30155205 PMCID: PMC6094158 DOI: 10.1039/c6sc05619a] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 02/18/2017] [Indexed: 12/22/2022] Open
Abstract
Naphthyl-linked donor–π–acceptor fluorophores were utilized to achieve high performance and good color purity violet-blue emission in organic light-emitting devices (OLEDs).
In this work, we revealed a new approach for the development of efficient violet-blue emitting materials featuring a hybrid local and charge transfer (HLCT) excited state through the incorporation of naphthyl group(s) as a weak n-type π spacer in a donor–π–acceptor (D–π–A) system. The resulting materials (TPINCz and TPIBNCz) show improved intramolecular charge transfer properties and highly efficient violet-blue fluorescence. It is demonstrated that the pattern of the π spacers has significant influence on the photophysical properties. The incorporation of a naphthyl/binaphthyl spacer between the donor and acceptor moieties can alleviate the common dilemma that enhancing device performance by increasing the charge transfer excited properties often leads to red-shifted emissions. A device using TPINCz as an emissive dopant shows a violet-blue emission with CIE coordinates of (0.153, 0.059) and a record high EQE of 6.56 ± 0.11% at a brightness of 1000 cd m–2. To the best of our knowledge, this performance is the highest among the reported devices with CIEy ≤0.08. Our study provides a new pathway for the design of high-performance violet-blue emitters with a D–π–A architecture in organic electroluminescence applications.
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Affiliation(s)
- Wen-Cheng Chen
- Center of Super-Diamond and Advanced Films (COSDAF) , Department of Chemistry , City University of Hong Kong , Hong Kong SAR , PR China .
| | - Yi Yuan
- Center of Super-Diamond and Advanced Films (COSDAF) , Department of Chemistry , City University of Hong Kong , Hong Kong SAR , PR China . .,Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , PR China .
| | - Shao-Fei Ni
- Department of Chemistry , Southern University of Science and Technology , Shenzhen , 518055 , PR China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , PR China .
| | - Fu-Lung Wong
- Center of Super-Diamond and Advanced Films (COSDAF) , Department of Chemistry , City University of Hong Kong , Hong Kong SAR , PR China .
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) , Department of Chemistry , City University of Hong Kong , Hong Kong SAR , PR China .
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40
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Tang X, Shan T, Bai Q, Ma H, He X, Lu P. Efficient Deep-Blue Electroluminescence Based on Phenanthroimidazole-Dibenzothiophene Derivatives with Different Oxidation States of the Sulfur Atom. Chem Asian J 2017; 12:552-560. [DOI: 10.1002/asia.201601626] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/05/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Xiangyang Tang
- Department of Chemistry; Jilin University; State Key Laboratory of Supramolecular Structure and Materials; 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Tong Shan
- Department of Chemistry; Jilin University; State Key Laboratory of Supramolecular Structure and Materials; 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Qing Bai
- Department of Chemistry; Jilin University; State Key Laboratory of Supramolecular Structure and Materials; 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Hongwei Ma
- Department of Chemistry; Jilin University; State Key Laboratory of Supramolecular Structure and Materials; 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Xin He
- Department of Chemistry; Jilin University; State Key Laboratory of Supramolecular Structure and Materials; 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Ping Lu
- Department of Chemistry; Jilin University; State Key Laboratory of Supramolecular Structure and Materials; 2699 Qianjin Avenue Changchun 130012 P. R. China
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41
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Thanikachalam V, Sarojpurani E, Jayabharathi J, Jeeva P. Efficient phenanthroimidazole-styryl-triphenylamine derivatives for blue OLEDs: a combined experimental and theoretical study. NEW J CHEM 2017. [DOI: 10.1039/c6nj03801h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Blue emitting devices based on 2-(4′-9H-carbazol-9-yl)-[1,1′-styryl]-4-yl-1-benzylpiperidine-1H-phenanthro[9,10-d]imidazole (Cz-BPIS) exhibits blue emission with CIE coordinates of (0.16, 0.09), current density of 1.91 cd/A, power efficiency of 1.63 lm/W and external quantum efficiency of 2.61%.
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Affiliation(s)
| | | | | | - Palanivel Jeeva
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
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42
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Wang Z, Zheng C, Fu W, Xu C, Wu J, Ji B. Efficient non-doped deep-blue electroluminescence devices based on unsymmetrical and highly twisted pyrene derivatives. NEW J CHEM 2017. [DOI: 10.1039/c7nj02806g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Pyrene derivatives with unsymmetrical and highly twisted structure appropriately confined the conjugation extent of molecules resulting in efficient deep-blue emissions.
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Affiliation(s)
- Zhiqiang Wang
- College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- P. R. China
| | - Caijun Zheng
- School of Optoelectronic Information
- University of Electronic Science and Technology of China
- Chengdu
- P. R. China
| | - Weijun Fu
- College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- P. R. China
| | - Chen Xu
- College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- P. R. China
| | - Jiasheng Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Baoming Ji
- College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- P. R. China
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43
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Ivanauskaite A, Lygaitis R, Raisys S, Kazlauskas K, Kreiza G, Volyniuk D, Gudeika D, Jursenas S, Grazulevicius JV. Structure–property relationship of blue solid state emissive phenanthroimidazole derivatives. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp02248d] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of phenanthro[9,10-d]imidazole derivatives featuring multifunctional properties of ambipolar transport have been synthesized, a deep blue emission with high fluorescence quantum yield is observed, and the formation of thermally stable molecular glass is described.
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Affiliation(s)
- Agne Ivanauskaite
- Department of Polymer Chemistry and Technology
- Kaunas University of Technology
- LT-50254 Kaunas
- Lithuania
| | - Ramunas Lygaitis
- Department of Polymer Chemistry and Technology
- Kaunas University of Technology
- LT-50254 Kaunas
- Lithuania
| | - Steponas Raisys
- Institute of Applied Research
- Vilnius University
- LT-10257 Vilnius
- Lithuania
| | - Karolis Kazlauskas
- Institute of Applied Research
- Vilnius University
- LT-10257 Vilnius
- Lithuania
| | - Gediminas Kreiza
- Institute of Applied Research
- Vilnius University
- LT-10257 Vilnius
- Lithuania
| | - Dmytro Volyniuk
- Department of Polymer Chemistry and Technology
- Kaunas University of Technology
- LT-50254 Kaunas
- Lithuania
| | - Dalius Gudeika
- Department of Polymer Chemistry and Technology
- Kaunas University of Technology
- LT-50254 Kaunas
- Lithuania
| | - Saulius Jursenas
- Institute of Applied Research
- Vilnius University
- LT-10257 Vilnius
- Lithuania
| | - Juozas V. Grazulevicius
- Department of Polymer Chemistry and Technology
- Kaunas University of Technology
- LT-50254 Kaunas
- Lithuania
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44
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Kumar Konidena R, Justin Thomas KR, Kumar Dubey D, Sahoo S, Jou JH. A new molecular design based on hybridized local and charge transfer fluorescence for highly efficient (>6%) deep-blue organic light emitting diodes. Chem Commun (Camb) 2017; 53:11802-11805. [DOI: 10.1039/c7cc07139f] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A new molecular design featuring a carbazole-derivative as an acceptor and a triphenylamine donor and displaying hybridized local and charge transfer (HLCT) fluorescence is demonstrated.
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Affiliation(s)
- Rajendra Kumar Konidena
- Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee
- India
| | - K. R. Justin Thomas
- Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee
- India
| | - Deepak Kumar Dubey
- Department of Material Science and Engineering, National Tsing Hua University
- Hsinchu
- Taiwan
| | - Snehasis Sahoo
- Department of Material Science and Engineering, National Tsing Hua University
- Hsinchu
- Taiwan
| | - Jwo-Huei Jou
- Department of Material Science and Engineering, National Tsing Hua University
- Hsinchu
- Taiwan
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45
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You DK, Lee SH, Lee JH, Kwak SW, Hwang H, Lee J, Chung Y, Park MH, Lee KM. Synthesis and photophysical properties of phenanthroimidazole–triarylborane dyads: intriguing ‘turn-on’ sensing mediated by fluoride anions. RSC Adv 2017. [DOI: 10.1039/c6ra28559g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Phenanthroimidazole-based triarylborane compounds with an N-phenyl or N-biphenyl bridge were prepared and these compounds show ratiometrical ‘turn-on’ response in PL spectra upon fluoride binding to the borane moiety.
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Affiliation(s)
- Dong Kyun You
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Seon Hee Lee
- Department of Chemistry Education
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Sang Woo Kwak
- Department of Chemistry
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Junseong Lee
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Yongseog Chung
- Department of Chemistry
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Myung Hwan Park
- Department of Chemistry Education
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| |
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