1
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Sensitivity of the hidden TADF to the linking topology of di-tert-butyl-carbazolyl and benzonitrile moieties in the molecules of emitters or hosts intended for efficient blue OLEDs. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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2
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Liu GC, Huang TH, Wang HW, Hsu CH, Chou PT, Hung WY, Wong KT. Exciplex-Forming Cohost Systems with 2,3-Dicyanopyrazinophenanthrene-based Acceptors to Achieve Efficient Near Infrared OLEDs. Chemistry 2023; 29:e202203660. [PMID: 36650716 DOI: 10.1002/chem.202203660] [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: 11/24/2022] [Revised: 12/26/2022] [Accepted: 01/16/2023] [Indexed: 01/19/2023]
Abstract
Two new 2,3-dicyanopyrazinophenanthrene-based acceptors (A) p-QCN and m-QCN were synthesized to blend with a donor (D) CPTBF for the exciplex formation. The energy levels of p-QCN and m-QCN are modulated by the peripheral substituents 4- and 3-benzonitrile, respectively. Exciplex-forming blends were identified by the observation of the red-shifted emissions from various D : A blends with higher ratios of donor for suppressing the aggregation of acceptor. The two-component relaxation processes observed by time-resolved photoluminescence support the thermally activated delayed fluorescence (TADF) character of the exciplex-forming blends. The device employing CPTBF : p-QCN and (2 : 1) and CPTBF : m-QCN (2 : 1) blend as the emitting layer (EML) gave EQEmax of 1.76 % and 5.12 %, and electroluminescence (EL) λmax of 629 nm and 618 nm, respectively. The device efficiency can be further improved to 4.32 % and 5.57 % with CPTBF : p-QCN and (4 : 1) and CPTBF : m-QCN (4 : 1) as the EML, which is consistent with their improved photoluminescence quantum yields (PLQYs). A new fluorescent emitter BPBBT with photoluminescence (PL) λmax of 726 nm and a high PLQY of 67 % was synthesized and utilized as the dopant of CPTBF : m-QCN (4 : 1) cohost system. The device employing CPTBF : m-QCN (4 : 1): 5 wt.% BPBBT as the EML gave an EQEmax of 5.02 % and EL λmax centered at 735 nm, however, the weak residual exciplex emission remains. By reducing the donor ratio, the exciplex emission can be completely transferred to BPBBT and the corresponding device with CPTBF : m-QCN (2 : 1): 5 wt.% BPBBT as the EML can achieve EL λmax of 743 nm and EQEmax of 4.79 %. This work manifests the high efficiency near infrared (NIR) OLED can be realized by triplet excitons harvesting of exciplex-forming cohost system, followed by the effective energy transfer to an NIR fluorescent dopant.
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Affiliation(s)
- Guan-Cheng Liu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Tzu-Hao Huang
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 202, Taiwan
| | - Hao-Wen Wang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Chao-Hsien Hsu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Wen-Yi Hung
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung, 202, Taiwan
| | - Ken-Tsung Wong
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.,Institute of Atomic and Molecular Science, Academia Sinica, Taipei, 10617, Taiwan
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3
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A green protocol for the electrochemical synthesis of a fluorescent dye with antibacterial activity from imipramine oxidation. Sci Rep 2022; 12:4921. [PMID: 35318352 PMCID: PMC8941072 DOI: 10.1038/s41598-022-08770-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 03/02/2022] [Indexed: 12/31/2022] Open
Abstract
Electrochemical oxidation of imipramine (IMP) has been studied in aqueous solutions by cyclic voltammetry and controlled-potential coulometry techniques. Our voltammetric results show a complex behavior for oxidation of IMP at different pH values. In this study, we focused our attention on the electrochemical oxidation of IMP at a pH of about 5. Under these conditions, our results show that the oxidation of IMP leads to the formation of a unique dimer of IMP (DIMP). The structure of synthesized dimer is fully characterized by UV-visible, FTIR, 1H NMR, 13C NMR and mass spectrometry techniques. It seems that the first step in the oxidation of IMP is the cleavage of the alkyl group (formation of IMPH). After this, a domino oxidation-hydroxylation-dimerization-oxidation reaction, converts IMPH to (E)-10,10',11,11'-tetrahydro-[2,2'-bidibenzo[b,f]azepinylidene]-1,1'(5H,5'H)-dione (DIMP). The synthesis of DIMP is performed in an aqueous solution under mild conditions, without the need for any catalyst or oxidant. Based on our electrochemical findings as well as the identification of the final product, a possible reaction mechanism for IMP oxidation has been proposed. Conjugated double bonds in the DIMP structure cause the compound to become colored with sufficient fluorescence activity (excitation wave-length 535 nm and emission wave-length 625 nm). Moreover, DIMP has been evaluated for in vitro antibacterial. The antibacterial tests indicated that DIMP showed good antibacterial performance against all examined gram-positive and gram-negative bacteria (Staphylococcus aureus, Bacillus cereus, Escherichia coli and Shigella sonnei).
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4
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Novel difluorenyl substituted 1,3,5-triazine and carbazole based bipolar host materials with high thermal stability for efficient green phosphorescent organic light-emitting diodes (PhOLEDs). Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Chen C, Cheng J, Ding W, Lin Z, Chen Y, Chiu T, Lo Y, Lee J, Wong K. New carboline‐based donors for green exciplex‐forming systems. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chia‐Hsun Chen
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Ju‐Ting Cheng
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Wen‐Cheng Ding
- Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering National Taiwan University Taipei Taiwan
| | - Zong‐Liang Lin
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Yi‐Sheng Chen
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Tien‐Lung Chiu
- Department of Electrical Engineering Yuan Ze University Taoyuan Taiwan
| | - Yuan‐Chih Lo
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Jiun‐Haw Lee
- Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering National Taiwan University Taipei Taiwan
| | - Ken‐Tsung Wong
- Department of Chemistry National Taiwan University Taipei Taiwan
- Institute of Atomic and Molecular Science, Academia Sinica Taipei Taiwan
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6
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Li G, Zheng J, Klimes K, Zhu ZQ, Wu J, Zhu H, Li J. Novel Carbazole/Fluorene-Based Host Material for Stable and Efficient Phosphorescent OLEDs. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40320-40331. [PMID: 31603311 DOI: 10.1021/acsami.9b13245] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A novel host material of "M"-type carbazole/fluorene-based mDCzPF with a high triplet energy by utilizing meta-substituted phenyl groups as linkers was developed. It was demonstrated that the position of the substituents significantly affected the molecular configuration and dipole moment, which played a critical role in the device performances. Red phosphorescent OLED utilizing the "M"-type mDCzPF as the host represented a 10-fold operational lifetime improvement over the OLED using a "V"-type pDCzPF linked by para-substituted phenyl groups as the host because of the good charge transport ability of the mDCzPF. Additionally, the "M"-type mDCzPF host was also compatible with a blue emitting phosphorescent emitter PtNON. The PtNON-doped OLED using mDCzPF as the host exhibited a peak EQE of 18.3% with a small roll off, yet maintained an EQE of 13.3% at a high brightness of 5000 cd/m2. Thus, the novel "M"-type mDCzPF could be employed as stable host material for efficient OLED emitting across the whole visible spectrum. This study should provide a viable method for designing new host materials for the development of stable and efficient phosphorescent OLEDs.
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Affiliation(s)
- Guijie Li
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering , Zhejiang University of Technology , Hangzhou , Zhejiang 310014 , P. R. China
- Material Science and Engineering , Arizona State University , Tempe , Arizona 85281 , United States
| | - Jianbing Zheng
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering , Zhejiang University of Technology , Hangzhou , Zhejiang 310014 , P. R. China
| | - Kody Klimes
- Material Science and Engineering , Arizona State University , Tempe , Arizona 85281 , United States
| | - Zhi-Qiang Zhu
- Material Science and Engineering , Arizona State University , Tempe , Arizona 85281 , United States
| | - Jiang Wu
- Material Science and Engineering , Arizona State University , Tempe , Arizona 85281 , United States
| | - Huangtianzhi Zhu
- Department of Chemistry , Zhejiang University , Hangzhou , Zhejiang 310027 , P. R. China
| | - Jian Li
- Material Science and Engineering , Arizona State University , Tempe , Arizona 85281 , United States
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7
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Patil BN, Lade JJ, Vadagaonkar KS, Chetti P, Chaskar AC. Pyrrolo[1, 2-a]quinoxaline-Based Bipolar Host Materials for Efficient Red Phosphorescent OLEDs. ChemistrySelect 2018. [DOI: 10.1002/slct.201801817] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bhausaheb N. Patil
- National Centre for Nanosciences and Nanotechnology; University of Mumbai, Vidyanagari, Kalina Campus, Santacruz (East); Mumbai-400098 India
| | - Jatin J. Lade
- National Centre for Nanosciences and Nanotechnology; University of Mumbai, Vidyanagari, Kalina Campus, Santacruz (East); Mumbai-400098 India
| | - Kamlesh S. Vadagaonkar
- Department of Dyestuff Technology; Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (East); Mumbai-400019 India
| | - Prabhakar Chetti
- Department of Chemistry; National Institute of Technology; Kurukshetra-136119, Haryana India
| | - Atul C. Chaskar
- National Centre for Nanosciences and Nanotechnology; University of Mumbai, Vidyanagari, Kalina Campus, Santacruz (East); Mumbai-400098 India
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8
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Moore MD, Bowler MH, Reynolds JE, Lynch VM, Shen Y, Slinker JD, Sessler JL. Ionic Organic Small Molecules as Hosts for Light-Emitting Electrochemical Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:24699-24707. [PMID: 29952560 DOI: 10.1021/acsami.8b08176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Light-emitting electrochemical cells (LEECs) from ionic transition-metal complexes (iTMCs) offer the potential for high-efficiency electroluminescence in a simple, single-layer device. However, LEECs typically rely on the use of rare metal complexes. This has limited their cost effectiveness and put constraints on their applicability. With a view to leveraging the efficient emission of these complexes while mitigating costs, we describe here a host/guest LEEC strategy that relies on the use of carbazole (Cz)-based organic small-molecule hosts and iTMC guests. Three cationic host molecules were prepared via the coupling of 1-(4-bromophenyl)-2-phenylbenzimidazole (PBI-Br) with Cz. This has allowed a comparison between the hosts bearing methoxy (PBI-CzOMe) and tert-butyl (PBI-Cz tBu) substituents, as well as an unsubstituted analogue (PBI-CzH). Cyclic voltammetry and UV-visible absorption revealed that all three host materials have wide band gaps characterized by reversible oxidation and irreversible reduction events. On the basis of electronic structure calculations, the host highest occupied molecular orbital (HOMO) resides primarily on the Cz moiety, whereas the lowest unoccupied molecular orbital (LUMO) is located primarily on the phenyl-benzimidazolium unit. Photoluminescence analysis of thin-film blends of PBI-CzH with iTMC guests confirmed that the emission was blue-shifted relative to pristine iTMC films, which is consistent with what was seen in dilute dichloromethane solution. LEEC devices were prepared based on thin films of the pristine hosts, pristine guests, and 90%/10% (w/w) host/guest blends. Among these host/guest blends, LEECs based on PBI-CzH displayed the best performance, particularly when an iridium complex was used as the guest. The system in question yielded a luminance maximum of 624 cd/m2 at an external quantum efficiency of 3.80%. This result stands in contrast to what is seen with typical organic light-emitting diode host studies, where tert-butyl substitution of the host generally leads to a better performance. To rationalize the present observations, the host materials were subject to single-crystal X-ray diffraction analysis. The resulting structures revealed clear head-to-tail interactions in the case of both PBI-CzH and PBI-CzOMe. No such interactions were evident in the case of PBI-Cz tBu. Furthermore, PBI-CzH showed a relatively smaller spacing between the successive HOMO and successive LUMO levels relative to PBI-CzOMe and PBI-Cz tBu, a finding consistent with more favorable charge transport and energy transfer. The results presented here can help inform the design and preparation of host materials suitable for use in single-layer iTMC LEECs.
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Affiliation(s)
- Matthew D Moore
- Department of Chemistry , The University of Texas at Austin , 105 East 24th Street , Austin , Texas 78712-1224 , United States
| | - Melanie H Bowler
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , PHY 36, Richardson , Texas 75080-3021 , United States
| | - Joseph E Reynolds
- Department of Chemistry , The University of Texas at Austin , 105 East 24th Street , Austin , Texas 78712-1224 , United States
| | - Vincent M Lynch
- Department of Chemistry , The University of Texas at Austin , 105 East 24th Street , Austin , Texas 78712-1224 , United States
| | - Yulong Shen
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , PHY 36, Richardson , Texas 75080-3021 , United States
| | - Jason D Slinker
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , PHY 36, Richardson , Texas 75080-3021 , United States
| | - Jonathan L Sessler
- Department of Chemistry , The University of Texas at Austin , 105 East 24th Street , Austin , Texas 78712-1224 , United States
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Wu JL, Lee YT, Chen CT, Chen CT. Solution-processed Small Molecular Materials: Bulk Heterojunction Organic Photovoltaic Materials, Host Materials for Phosphorescence Organic Light-emitting Diodes, and Nondopant Thermally Activated Delayed Fluorescence Materials. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700244] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jhao-Lin Wu
- Department of Chemistry; National Taiwan University; Taipei 10617 Taiwan
| | - Yi-Ting Lee
- Department of Chemistry; National Taiwan University; Taipei 10617 Taiwan
| | - Chin-Ti Chen
- Institute of Chemistry; Academia Sinica; Taipei 11529 Taiwan
| | - Chao-Tsen Chen
- Department of Chemistry; National Taiwan University; Taipei 10617 Taiwan
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10
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Hung WY, Wang TC, Chiang PY, Peng BJ, Wong KT. Remote Steric Effect as a Facile Strategy for Improving the Efficiency of Exciplex-Based OLEDs. ACS APPLIED MATERIALS & INTERFACES 2017; 9:7355-7361. [PMID: 28150488 DOI: 10.1021/acsami.6b16083] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work reports a new strategy of introducing remote steric effect onto the electron donor for giving the better performance of the exciplex-based organic light-emitting device (OLED). The bulky triphenylsilyl group (SiPh3) was introduced onto the fluorene bridge of 4,4'-(9H-fluorene-9,9-diyl)bis(N,N-di-p-tolylaniline) (DTAF) to create remote steric interactions for increasing the possibility of effective contacts between electron-donating chromophores and acceptor molecules, rendering the resulting exciplex to have a higher photoluminescence quantum yield (PLQY). The green exciplex device based on DSDTAF:3N-T2T (1:1) as an emitting layer exhibits a low turn-on voltage of 2.0 V, high maximum efficiencies (13.2%, 42.9 cd A-1, 45.5 lm W-1), which are higher than the device employed DTAF (without SiPh3 groups) (11.6%, 35.3 cd A-1, 41.3 lm W-1) as donor under the same device structure. This strategy was further examined for blue exciplex, where the EQE was enhanced from 9.5% to 12.5% as the electron acceptor PO-T2T mixed with a tert-butyl group substituted carbazole-based donor (CPTBF) as the emitting exciplex in device. This strategy is simple and useful for developing high performance exciplex OLEDs.
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Affiliation(s)
- Wen-Yi Hung
- Institute of Optoelectronic Sciences, National Taiwan Ocean University , Keelung 202, Taiwan
| | - Ting-Chih Wang
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
| | - Pin-Yi Chiang
- Institute of Optoelectronic Sciences, National Taiwan Ocean University , Keelung 202, Taiwan
| | - Bo-Ji Peng
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
| | - Ken-Tsung Wong
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
- Institute of Atomic and Molecular Science , Taipei 106, Taiwan
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11
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Pure aromatic hydrocarbons with meta-linked phenyl-core and perihedral fluorene substitutions with/without inert groups of tert-butyl: bipolar hosts for blue phosphorescence. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0155-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Yuan GY, Zhang L, Wang MJ, Zhang KL. Synthesis and characterization of a cadmium(II)-organic supramolecular coordination compound based on the multifunctional 2-amino-5-sulfobenzoic acid ligand. Acta Crystallogr C Struct Chem 2016; 72:939-946. [PMID: 27918294 DOI: 10.1107/s2053229616016326] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 10/13/2016] [Indexed: 12/24/2022] Open
Abstract
Much attention has been paid by chemists to the construction of supramolecular coordination compounds based on the multifunctional ligand 5-sulfosalicylic acid (H3SSA) due to the structural and biological interest of these compounds. However, no coordination compounds have been reported for the multifunctional amino-substituted sulfobenzoate ligand 2-amino-5-sulfobenzoic acid (H2asba). We expected that H2asba could be a suitable building block for the assembly of supramolecular networks due to its interesting structural characteristics. The reaction of cadmium(II) nitrate with H2asba in the presence of the auxiliary flexible dipyridylamide ligand N,N'-bis[(pyridin-4-yl)methyl]oxamide (4bpme) under ambient conditions formed a new mixed-ligand coordination compound, namely bis(3-amino-4-carboxybenzenesulfonato-κO1)diaquabis{N,N'-bis[(pyridin-4-yl)methyl]oxamide-κN}cadmium(II)-N,N'-bis[(pyridin-4-yl)methyl]oxamide-water (1/1/4), [Cd(C7H6NO5S)2(C14H14N4O2)2(H2O)2]·C14H14N4O2·4H2O, (1), which was characterized by single-crystal and powder X-ray diffraction analysis (PXRD), FT-IR spectroscopy, thermogravimetric analysis (TG), and UV-Vis and photoluminescence spectroscopic analyses in the solid state. The central CdII atom in (1) occupies a special position on a centre of inversion and exhibits a slightly distorted octahedral geometry, being coordinated by two N atoms from two monodentate 4bpme ligands, four O atoms from two monodentate 4-amino-3-carboxybenzenesulfonate (Hasba-) ligands and two coordinated water molecules. Interestingly, complex (1) further extends into a threefold polycatenated 0D→2D (0D is zero-dimensional and 2D is two-dimensional) interpenetrated supramolecular two-dimensional (4,4) layer through intermolecular hydrogen bonding. The interlayer hydrogen bonding further links adjacent threefold polycatenated two-dimensional layers into a three-dimensional network. The optical properties of complex (1) indicate that it may be used as a potential indirect band gap semiconductor material. Complex (1) exhibits an irreversible dehydration-rehydration behaviour. The fluorescence properties have also been investigated in the solid state at room temperature.
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Affiliation(s)
- Gan Yin Yuan
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China
| | - Lei Zhang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China
| | - Meng Jie Wang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China
| | - Kou Lin Zhang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China
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14
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Gu Y, Zhu L, Li Y, Yu L, Wu K, Chen T, Huang M, Wang F, Gong S, Ma D, Qin J, Yang C. Adamantane-Based Wide-Bandgap Host Material: Blue Electrophosphorescence with High Efficiency and Very High Brightness. Chemistry 2015; 21:8250-6. [DOI: 10.1002/chem.201500517] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Indexed: 11/08/2022]
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15
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Dumur F, Goubard F. Triphenylamines and 1,3,4-oxadiazoles: a versatile combination for controlling the charge balance in organic electronics. NEW J CHEM 2014. [DOI: 10.1039/c3nj01537h] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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High thermal stability 3, 6-fluorene-carbazole-dendrimers as host materials for efficient solution-processed blue phosphorescent devices. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Synthesis, structures and properties of a series of manganese coordination complexes constructed from dicarboxylic fluorene derivatives. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2012.08.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Fluorescent oligomers of dibenzothiophene-S,S-dioxide derivatives: the interplay of crystal conformations and photo-physical properties. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.085] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Meunmart D, Prachumrak N, Keawin T, Jungsuttiwong S, Sudyoadsuk T, Promark V. Bis(4-diphenylaminophenyl)carbazole end-capped fluorene as solution-processed deep-blue light-emitting and hole-transporting materials for electroluminescent devices. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Ha Park J, Koh TW, Do Y, Hyung Lee M, Yoo S. Soluble polynorbornenes with pendant carbazole derivatives as host materials for highly efficient blue phosphorescent organic light-emitting diodes. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Xiao L, Chen Z, Qu B, Luo J, Kong S, Gong Q, Kido J. Recent progresses on materials for electrophosphorescent organic light-emitting devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:926-52. [PMID: 21031450 DOI: 10.1002/adma.201003128] [Citation(s) in RCA: 664] [Impact Index Per Article: 51.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2010] [Indexed: 05/22/2023]
Abstract
Although organic light-emitting devices have been commercialized as flat panel displays since 1997, only singlet excitons were emitted. Full use of singlet and triplet excitons, electrophosphorescence, has attracted increasing attentions after the premier work made by Forrest, Thompson, and co-workers. In fact, red electrophosphorescent dye has already been used in sub-display of commercial mobile phones since 2003. Highly efficient green phosphorescent dye is now undergoing of commercialization. Very recently, blue phosphorescence approaching the theoretical efficiency has also been achieved, which may overcome the final obstacle against the commercialization of full color display and white light sources from phosphorescent materials. Combining light out-coupling structures with highly efficient phosphors (shown in the table-of-contents image), white emission with an efficiency matching that of fluorescent tubes (90 lm/W) has now been realized. It is possible to tune the color to the true white region by changing to a deep blue emitter and corresponding wide gap host and transporting material for the blue phosphor. In this article, recent progresses in red, green, blue, and white electrophosphorescent materials for OLEDs are reviewed, with special emphasis on blue electrophosphorescent materials.
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Affiliation(s)
- Lixin Xiao
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing, PR China.
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Park JH, Yun C, Koh TW, Do Y, Yoo S, Lee MH. Vinyl-type polynorbornene with 9,9′-(1,1′-biphenyl)-4,4′-diylbis-9H-carbazole side groups as a host material for highly efficient green phosphorescent organic light-emitting diodes. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03755a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Jiang W, Duan L, Qiao J, Dong G, Zhang D, Wang L, Qiu Y. High-triplet-energy tri-carbazole derivatives as host materials for efficient solution-processed blue phosphorescent devices. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03365k] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhao Z, Chen S, Deng C, Lam JWY, Chan CYK, Lu P, Wang Z, Hu B, Chen X, Lu P, Kwok HS, Ma Y, Qiu H, Tang BZ. Construction of efficient solid emitters with conventional and AIE luminogens for blue organic light-emitting diodes. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10221d] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chen R, Zhu R, Zheng C, Fan Q, Huang W. Synthesis, characterization and applications of vinylsilafluorene copolymers: New host materials for electroluminescent devices. Sci China Chem 2010. [DOI: 10.1007/s11426-010-4108-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Synthesis and characterization of organic dyes containing various donors and acceptors. Int J Mol Sci 2010; 11:329-53. [PMID: 20162019 PMCID: PMC2821007 DOI: 10.3390/ijms11010329] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2009] [Revised: 12/23/2009] [Accepted: 01/17/2010] [Indexed: 11/16/2022] Open
Abstract
New organic dyes comprising carbazole, iminodibenzyl, or phenothiazine moieties, respectively, as the electron donors, and cyanoacetic acid or acrylic acid moieties as the electron acceptors/anchoring groups were synthesized and characterized. The influence of heteroatoms on carbazole, iminodibenzyl and phenothiazine donors, and cyano-substitution on the acid acceptor is evidenced by spectral, electrochemical, photovoltaic experiments, and density functional theory calculations. The phenothiazine dyes show solar-energy-to-electricity conversion efficiency (η) of 3.46–5.53%, whereas carbazole and iminodibenzyl dyes show η of 2.43% and 3.49%, respectively.
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Duan L, Hou L, Lee TW, Qiao J, Zhang D, Dong G, Wang L, Qiu Y. Solution processable small molecules for organic light-emitting diodes. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b926348a] [Citation(s) in RCA: 518] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Aly SM, Ho CL, Wong WY, Fortin D, Harvey PD. Intrachain Electron and Energy Transfers in Metal Diynes and Polyynes of Group 10−11 Transition Elements Containing Various Carbazole and Fluorene Hybrids. Macromolecules 2009. [DOI: 10.1021/ma9013077] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shawkat M. Aly
- Département de chimie, Université de Sherbrooke, 2550 Boul. Université, Sherbrooke, PQ, J1K 2R1 Canada
| | - Cheuk-Lam Ho
- Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P.R. China
| | - Wai-Yeung Wong
- Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P.R. China
| | - Daniel Fortin
- Département de chimie, Université de Sherbrooke, 2550 Boul. Université, Sherbrooke, PQ, J1K 2R1 Canada
| | - Pierre D. Harvey
- Département de chimie, Université de Sherbrooke, 2550 Boul. Université, Sherbrooke, PQ, J1K 2R1 Canada
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Wong WY, Ho CL. Functional metallophosphors for effective charge carrier injection/transport: new robust OLED materials with emerging applications. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b819943d] [Citation(s) in RCA: 484] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Aly S, Ho CL, Fortin D, Wong WY, Abd-El-Aziz A, Harvey P. Intrachain Electron and Energy Transfer in Conjugated Organometallic Oligomers and Polymers. Chemistry 2008; 14:8341-52. [DOI: 10.1002/chem.200800304] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhou GJ, Wong WY, Yao B, Xie Z, Wang L. Multifunctional metallophosphors with anti-triplet–triplet annihilation properties for solution-processable electroluminescent devices. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b718653c] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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