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Al-Zaabi UA, Al-Busafi SN, Rasbi NKA, Suliman FO. Synthesis and characterization of tris(5,7-diphenyl-8-quinolinolato) aluminum(III), gallium(III), and indium(III) complexes: Effect of metal ions on the structural, photoluminescence, thermal and electrochemical properties. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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2
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Xu WL, Lian Y, Huang J, Zhang Y, Zheng M, Yang X. Crystallization and photophysical dynamics of Tris(8-hydroxyquinoline) aluminum crystals fabricated by micro-spacing sublimation method. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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3
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Khan MB, Salah N, Khan ZH. Functional enhancement in Alq3 via metal doping and nanoscale synthesis: a review. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02348-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Saeed A, Madkhli AY, Pashameah RA, Bataweel NM, Razvi MA, Salah N. Antibacterial activity of the micro and nanostructures of the optical material tris(8-hydroxyquinoline)aluminum and its application as an antimicrobial coating. RSC Adv 2022; 12:27131-27144. [PMID: 36276042 PMCID: PMC9503380 DOI: 10.1039/d2ra04750k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/13/2022] [Indexed: 11/21/2022] Open
Abstract
This research gives insight into the optical material tris(8-hydroxyquinoline)aluminum (Alq3) micro and nanostructures as an antimicrobial agent against different human pathogenic bacteria. In this work, Alq3 was applied as an antimicrobial coating.
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Affiliation(s)
- Abdu Saeed
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Physics, Thamar University, Thamar 87246, Yemen
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Aysh Y. Madkhli
- Department of Physics, Faculty of Science, Jazan University, Jazan 45142, Saudi Arabia
| | - Rami Adel Pashameah
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah 24230, Saudi Arabia
| | - Noor M. Bataweel
- Department of Biological Science, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- King Fahd Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mir Ali Razvi
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Numan Salah
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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5
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Effects of X-ray irradiation on the structural and optical properties of microcrystalline Alq3 powder and its potential dosimetry application. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109656] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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6
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Alexander OT, Duvenhage MM, Kroon RE, Brink A, Visser HG. Comparison of a dimeric and a monomeric indium-quinolinato complex: synthesis, structure and photoluminescence. NEW J CHEM 2021. [DOI: 10.1039/d0nj03865b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Two indium(iii) complexes, mer-[In(Ox)3]·2H2O (1) and [In2(Ox)2Cl2-μ-[κ2-O,O′-(Ox)2]]·C7H8 (2) (Ox = 8-hydroxyquinolinate), were synthesized and characterised for comparison by NMR, X-ray diffraction and photoluminescence.
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Affiliation(s)
- Orbett T. Alexander
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Mart M. Duvenhage
- Department of Physics
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Robin E. Kroon
- Department of Physics
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Alice Brink
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
| | - Hendrik G. Visser
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
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7
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Wong CL, Ng M, Hong EYH, Wong YC, Chan MY, Yam VWW. Photoresponsive Dithienylethene-Containing Tris(8-hydroxyquinolinato)aluminum(III) Complexes with Photocontrollable Electron-Transporting Properties for Solution-Processable Optical and Organic Resistive Memory Devices. J Am Chem Soc 2020; 142:12193-12206. [DOI: 10.1021/jacs.0c03057] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Cheok-Lam Wong
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Maggie Ng
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Eugene Yau-Hin Hong
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yi-Chun Wong
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Mei-Yee Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Vivian Wing-Wah Yam
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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8
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Fine Fabrication and Optical Waveguide Characteristics of Hexagonal tris(8-hydroxyquinoline)aluminum(Ⅲ) (Alq3) Crystal. CRYSTALS 2020. [DOI: 10.3390/cryst10040260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein, we reported on the precise growth and optical waveguide characteristics of hexagonal tris(8-hydroxyquinoline)aluminum(Ⅲ) (Alq3) micro-crystals (MCs). The hexagonal Alq3 MCs were prepared using surfactant-assisted assembly growth with the help of cetyltrimethylammoniumbromide (CTAB), in which the crystallization occurred as a result of molecular assembly and packing. Also, we adjusted the molar ratio of Alq3 and CTAB for the control degree of crystallization. The formation and structure of Alq3 MCs were investigated using field-emission scanning electron microscopy and X-ray diffraction pattern experiments, respectively. The solid-state laser confocal microscope-photoluminescence spectra and charge-coupled device images for the Alq3 MCs were measured to study the luminescence efficiency and colors, respectively. The optical waveguide performance of the hexagonal Alq3 MCs was measured for each side direction. According to our results, crystalline Alq3 micro-crystals are promising materials for application to the development of optical communication devices.
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Mellah B, Sall D, Msaddak I, Srasra E. Intercalation of 8-hydroxyquinoline into Na(I)- and Zn(II)-Tunisian montmorillonites: characterization and luminescence properties of elaborated hybrids. J INCL PHENOM MACRO 2018. [DOI: 10.1007/s10847-018-0826-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Growth and Brilliant Photo-Emission of Crystalline Hexagonal Column of Alq₃ Microwires. MATERIALS 2018; 11:ma11040472. [PMID: 29565306 PMCID: PMC5951318 DOI: 10.3390/ma11040472] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/16/2018] [Accepted: 03/19/2018] [Indexed: 11/29/2022]
Abstract
We report the growth and nanoscale luminescence characteristics of 8-hydroxyquinolinato aluminum (Alq3) with a crystalline hexagonal column morphology. Pristine Alq3 nanoparticles (NPs) were prepared using a conventional reprecipitation method. Crystal hexagonal columns of Alq3 were grown by using a surfactant-assisted self-assembly technique as an adjunct to the aforementioned reprecipitation method. The formation and structural properties of the crystalline and non-crystalline Alq3 NPs were analyzed with scanning electron microscopy and X-ray diffraction. The nanoscale photoluminescence (PL) characteristics and the luminescence color of the Alq3 single NPs and their crystal microwires (MWs) were evaluated from color charge-coupled device images acquired using a high-resolution laser confocal microscope. In comparison with the Alq3 NPs, the crystalline MWs exhibited a very bright and sharp emission. This enhanced and sharp emission from the crystalline Alq3 single MWs originated from effective π-π stacking of the Alq3 molecules due to strong interactions in the crystalline structure.
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11
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Poostforooshan J, Badiei A, Farzi G, Goldooz H, Weber AP. Investigation of environmental and concentration effects on fluorescence properties of AlQ3 using mesoporous silica and polyacrylate. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0183-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Lima CFRAC, Taveira RJS, Costa JCS, Fernandes AM, Melo A, Silva AMS, Santos LMNBF. Understanding M-ligand bonding and mer-/fac-isomerism in tris(8-hydroxyquinolinate) metallic complexes. Phys Chem Chem Phys 2016; 18:16555-65. [PMID: 27273193 DOI: 10.1039/c6cp02608g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tris(8-hydroxyquinolinate) metallic complexes, Mq3, are one of the most important classes of organic semiconductor materials. Herein, the nature of the chemical bond in Mq3 complexes and its implications on their molecular properties were investigated by a combined experimental and computational approach. Various Mq3 complexes, resulting from the alteration of the metal and substitution of the 8-hydroxyquinoline ligand in different positions, were prepared. The mer-/fac-isomerism in Mq3 was explored by FTIR and NMR spectroscopy, evidencing that, irrespective of the substituent, mer- and fac-are the most stable molecular configurations of Al(iii) and In(iii) complexes, respectively. The relative M-ligand bond dissociation energies were evaluated experimentally by electrospray ionization tandem mass spectrometry (ESI-MS-MS), showing a non-monotonous variation along the group (Al > In > Ga). The results reveal a strong covalent character in M-ligand bonding, which allows for through-ligand electron delocalization, and explain the preferred molecular structures of Mq3 complexes as resulting from the interplay between bonding and steric factors. The mer-isomer reduces intraligand repulsions, being preferred for smaller metals, while the fac-isomer is favoured for larger metals where stronger covalent M-ligand bonds can be formed due to more extensive through-ligand conjugation mediated by metal "d" orbitals.
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Affiliation(s)
- Carlos F R A C Lima
- CIQ, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.
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13
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Du J, Wang M, Chen N, Xie S, Yu H, Wu Q. Instability origin and improvement scheme of facial Alq3 for blue OLED application. Chem Res Chin Univ 2016. [DOI: 10.1007/s40242-016-5485-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Back SH, Park JH, Cui C, Ahn DJ. Bio-recognitive photonics of a DNA-guided organic semiconductor. Nat Commun 2016; 7:10234. [PMID: 26725969 PMCID: PMC4725759 DOI: 10.1038/ncomms10234] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 11/19/2015] [Indexed: 11/21/2022] Open
Abstract
Incorporation of duplex DNA with higher molecular weights has attracted attention for a new opportunity towards a better organic light-emitting diode (OLED) capability. However, biological recognition by OLED materials is yet to be addressed. In this study, specific oligomeric DNA–DNA recognition is successfully achieved by tri (8-hydroxyquinoline) aluminium (Alq3), an organic semiconductor. Alq3 rods crystallized with guidance from single-strand DNA molecules show, strikingly, a unique distribution of the DNA molecules with a shape of an ‘inverted' hourglass. The crystal's luminescent intensity is enhanced by 1.6-fold upon recognition of the perfect-matched target DNA sequence, but not in the case of a single-base mismatched one. The DNA–DNA recognition forming double-helix structure is identified to occur only in the rod's outer periphery. This study opens up new opportunities of Alq3, one of the most widely used OLED materials, enabling biological recognition. BioLEDs is an emerging group of light-emitting diodes that use duplex-strand DNA to enhance luminescence intensity. Here, Back et al. show that only the specific binding between a pair of single-strand DNA can trigger the enhancement, which potentially makes BioLEDs an easy platform for DNA recognition.
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Affiliation(s)
- Seung Hyuk Back
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Jin Hyuk Park
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea
| | - Chunzhi Cui
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea
| | - Dong June Ahn
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea.,Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea.,Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Korea
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15
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Avetissov IC, Akkuzina AA, Avetisov RI, Khomyakov AV, Saifutyarov RR. Non-stoichiometry of tris(8-hydroxyquinoline) aluminium: is it possible? CrystEngComm 2016. [DOI: 10.1039/c6ce00011h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dependence of the 8-hydroxyquinoline (8-Hq) vapour pressure on temperature, log P8-Hq [Torr] = 8.4249 − 2963.5/T, (386–482 K) was measured by Bourdon manometer technique. Tris(8-hydroxyquinoline) aluminum crystals were grown under controlled P8-Hq [0.1–11.3 Torr] and their cell parameters were measured.
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Affiliation(s)
- I. Ch. Avetissov
- Department of Crystal Chemistry and Technology
- D. Mendeleev University of Chemical Technology of Russia
- Moscow, Russia
| | - A. A. Akkuzina
- Department of Crystal Chemistry and Technology
- D. Mendeleev University of Chemical Technology of Russia
- Moscow, Russia
| | - R. I. Avetisov
- Department of Crystal Chemistry and Technology
- D. Mendeleev University of Chemical Technology of Russia
- Moscow, Russia
| | - A. V. Khomyakov
- Department of Crystal Chemistry and Technology
- D. Mendeleev University of Chemical Technology of Russia
- Moscow, Russia
| | - R. R. Saifutyarov
- Department of Crystal Chemistry and Technology
- D. Mendeleev University of Chemical Technology of Russia
- Moscow, Russia
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16
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Camerel F, Vacher A, Jeannin O, Barberá J, Fourmigué M. Ionic Self-Assembly and Red-Phosphorescence Properties of a Charged Platinum(II) 8-Quinolinol Complex Associated with Ammonium-Based Amphiphiles. Chemistry 2015; 21:19149-58. [PMID: 26552608 DOI: 10.1002/chem.201502780] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Indexed: 11/09/2022]
Abstract
A series of ionic associates based on the platinum(II) chelate of 5-sulfo-8-quinolinol, [Pt(qS)2](2-), and ammonium-based amphiphiles is described. At variance with the prototypical neutral complex Pt(q)2 (q=8-quinolinol), these dianionic fluorophores, functionalized at the periphery with sulfonate groups, can be associated by the ionic self-assembly approach with various ammonium cations, such as (H2n+1Cn)2Me2N(+) (n=12, 16, 18) or complex ammonium cations carrying three Cn carbon chains (n=12, 14, 16) and an additional amide group. Investigations of their luminescence properties in solution, in the solid state, and, when possible, in thin films revealed that the phosphorescence properties in condensed phases are directly correlated to intermolecular interactions between the luminescent [Pt(qS)2](2-) centers. Of particular interest is also the formation of a columnar liquid-crystalline phase around room temperature (between -25 and +180 °C), as well as the very good film-forming ability of some of these fluorophores from organic solvents.
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Affiliation(s)
- Franck Camerel
- Institut des Sciences Chimiques de Rennes, UMR 6226 (CNRS-Université de Rennes 1), Campus de Beaulieu, 35042 Rennes (France).
| | - Antoine Vacher
- Institut des Sciences Chimiques de Rennes, UMR 6226 (CNRS-Université de Rennes 1), Campus de Beaulieu, 35042 Rennes (France)
| | - Olivier Jeannin
- Institut des Sciences Chimiques de Rennes, UMR 6226 (CNRS-Université de Rennes 1), Campus de Beaulieu, 35042 Rennes (France)
| | - Joaquín Barberá
- Departamento de Química Orgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza (Spain)
| | - Marc Fourmigué
- Institut des Sciences Chimiques de Rennes, UMR 6226 (CNRS-Université de Rennes 1), Campus de Beaulieu, 35042 Rennes (France)
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17
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Cuba M, Muralidharan G. Improved luminescence intensity and stability of thermal annealed ZnO incorporated Alq3 composite films. J Fluoresc 2015; 25:1629-35. [PMID: 26399539 DOI: 10.1007/s10895-015-1649-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/09/2015] [Indexed: 10/23/2022]
Abstract
The 30 wt% of ZnO (weight percentage of ZnO has been optimised) incorporated tris- (8-hydroxyquinoline)aluminum (Alq3) has been synthesised and coated on to glass substrates using dip coating method. The structural and optical properties of the Alq3/ZnO composite film after thermal annealing from 50 to 300 °C insteps 50° has been studied and reported. XRD pattern reveals the presence of crystalline ZnO in all the annealed films. The films annealed above 150 °C reveal the presence of crystalline Alq3 along with crystalline ZnO. The FTIR spectra confirm the presence of hydroxyquinoline and ZnO vibration in all the annealed composite films. The composite films annealed above 150 °C show a partial sublimation and degradation of hydroxyquinoline compounds. The ZnO incorporated composite films (Alq3/ZnO) exhibit two emission peaks, one corresponding to ZnO at 487 nm and another at 513 nm due to Alq3. The films annealed at 200 °C exhibit maximum photoluminescence (PL) intensity than pristine film at 513 nm when excited at 390 nm.
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Affiliation(s)
- M Cuba
- Department of Physics, Gandhigram Rural Institute-Deemed University, Gandhigram, 624302, Tamil Nadu, India
| | - G Muralidharan
- Department of Physics, Gandhigram Rural Institute-Deemed University, Gandhigram, 624302, Tamil Nadu, India.
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18
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Scholz S, Kondakov D, Lüssem B, Leo K. Degradation Mechanisms and Reactions in Organic Light-Emitting Devices. Chem Rev 2015; 115:8449-503. [DOI: 10.1021/cr400704v] [Citation(s) in RCA: 418] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Sebastian Scholz
- Institut
für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Strasse 1, 01069 Dresden, Germany
- Fraunhofer-Institut für Photonische Mikrosysteme, Maria-Reiche-Strasse 2, 01199 Dresden, Germany
| | - Denis Kondakov
- DuPont Displays Inc., 4417 Lancaster
Pike, Wilmington, Delaware 19805, United States
| | - Björn Lüssem
- Institut
für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Strasse 1, 01069 Dresden, Germany
| | - Karl Leo
- Institut
für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Strasse 1, 01069 Dresden, Germany
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19
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Xie W, Song H, Fan J, Jiang F, Yuan H, Zhang S, Wei Z, Pang Z, Han S. Structures and photoluminescence properties of Alq3 1D materials prepared by an extremely facile solution method. RSC Adv 2015. [DOI: 10.1039/c5ra22241a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The formation processes of Alq3 rods and the performance of photoluminescence.
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Affiliation(s)
- Wanfeng Xie
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Hui Song
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Jihui Fan
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Feng Jiang
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Huimin Yuan
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Shiyu Zhang
- School of Optoelectronics
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
| | - Zhixian Wei
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Zhiyong Pang
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Shenghao Han
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
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Cuba M, Muralidharan G. Effect of thermal annealing on the structural and optical properties of tris-(8-hydroxyquinoline)aluminum(III) (Alq3) films. LUMINESCENCE 2014; 30:352-7. [PMID: 25044340 DOI: 10.1002/bio.2738] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/02/2014] [Accepted: 06/14/2014] [Indexed: 11/08/2022]
Affiliation(s)
- M. Cuba
- Department of Physics, Gandhigram Rural Institute; Deemed University; Gandhigram 642 302 Tamilnadu India
| | - G. Muralidharan
- Department of Physics, Gandhigram Rural Institute; Deemed University; Gandhigram 642 302 Tamilnadu India
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21
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Lambropoulos NA, Reimers JR, Crossley MJ, Hush NS, Silverbrook K. A multiscale simulation technique for molecular electronics: design of a directed self-assembled molecular n-bit shift register memory device. NANOTECHNOLOGY 2013; 24:505202. [PMID: 24270608 DOI: 10.1088/0957-4484/24/50/505202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A general method useful in molecular electronics design is developed that integrates modelling on the nano-scale (using quantum-chemical software) and on the micro-scale (using finite-element methods). It is applied to the design of an n-bit shift register memory that could conceivably be built using accessible technologies. To achieve this, the entire complex structure of the device would be built to atomic precision using feedback-controlled lithography to provide atomic-level control of silicon devices, controlled wet-chemical synthesis of molecular insulating pillars above the silicon, and controlled wet-chemical self-assembly of modular molecular devices to these pillars that connect to external metal electrodes (leads). The shift register consists of n connected cells that read data from an input electrode, pass it sequentially between the cells under the control of two external clock electrodes, and deliver it finally to an output device. The proposed cells are trimeric oligoporphyrin units whose internal states are manipulated to provide functionality, covalently connected to other cells via dipeptide linkages. Signals from the clock electrodes are conveyed by oligoporphyrin molecular wires, and μ-oxo porphyrin insulating columns are used as the supporting pillars. The developed multiscale modelling technique is applied to determine the characteristics of this molecular device, with in particular utilization of the inverted region for molecular electron-transfer processes shown to facilitate latching and control using exceptionally low energy costs per logic operation compared to standard CMOS shift register technology.
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Affiliation(s)
- Nicholas A Lambropoulos
- CSIRO Energy Technology, Life Sciences Centre, 11 Julius Avenue, North Ryde, NSW, 2113, Australia. School of Chemistry, The University of Sydney, Sydney, NSW, 2006, Australia
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Nilsen O, Haug KR, Finstad T, Fjellvåg H. Molecular Hybrid Structures by Atomic Layer Deposition - Deposition of Alq3, Znq2and Tiq4(q = 8-hydroxyquinoline). ACTA ACUST UNITED AC 2013. [DOI: 10.1002/cvde.201207043] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Gao H, Zhang H, Zhang H, Gen Y, Su ZM. Theoretical Study of Isomerism/Phase Dependent Charge Transport Properties in Tris(8-hydroxyquinolinato)aluminum(III). J Phys Chem A 2011; 115:9259-64. [PMID: 21809889 DOI: 10.1021/jp202976m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongze Gao
- Fundamental Department, Chinese People’s Armed Police Force Academy, Langfang 065000, Hebei, People's Republic of China
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China
| | - Hongyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, Jilin, People's Republic of China
| | - Houyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, Jilin, People's Republic of China
| | - Yun Gen
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, Jilin, People's Republic of China
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Yu F, Yang G, Wu S, Geng Y, Su Z. Determination of the charge transport abilities of polymorphs [C6F5Cu]2(4,4′-bipy) with different interactions: a density functional theoretical investigation. Theor Chem Acc 2011. [DOI: 10.1007/s00214-010-0883-7] [Citation(s) in RCA: 3] [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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Bi H, Chen D, Li D, Yuan Y, Xia D, Zhang Z, Zhang H, Wang Y. A green emissive amorphous fac-Alq3 solid generated by grinding crystalline blue fac-Alq3 powder. Chem Commun (Camb) 2011; 47:4135-7. [DOI: 10.1039/c1cc00060h] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hilsum C. Flat-panel electronic displays: a triumph of physics, chemistry and engineering. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:1027-1082. [PMID: 20123746 PMCID: PMC3263809 DOI: 10.1098/rsta.2009.0247] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This paper describes the history and science behind the development of modern flat-panel displays, and assesses future trends. Electronic displays are an important feature of modern life. For many years the cathode ray tube, an engineering marvel, was universal, but its shape was cumbersome and its operating voltage too high. The need for a flat-panel display, working at a low voltage, became imperative, and much research has been applied to this need. Any versatile flat-panel display will exploit an electro-optical effect, a transparent conductor and an addressing system to deliver data locally. The first need is to convert an electrical signal into a visible change. Two methods are available, the first giving emission of light, the second modulating ambient illumination. The most useful light-emitting media are semiconductors, historically exploiting III-V or II-VI compounds, but more recently organic or polymer semiconductors. Another possible effect uses gas plasma discharges. The modulating, or subtractive, effects that have been studied include liquid crystals, electrophoresis, electrowetting and electrochromism. A transparent conductor makes it possible to apply a voltage to an extended area while observing the results. The design is a compromise, since the free electrons that carry current also absorb light. The first materials used were metals, but some semiconductors, when heavily doped, give a better balance, with high transmission for a low resistance. Delivering data unambiguously to a million or so picture elements across the display area is no easy task. The preferred solution is an amorphous silicon thin-film transistor deposited at each cross-point in an X-Y matrix. Success in these endeavours has led to many applications for flat-panel displays, including television, flexible displays, electronic paper, electronic books and advertising signs.
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Hernández I, Gillin WP. Influence of High Hydrostatic Pressure on Alq3, Gaq3, and Inq3 (q = 8-Hydroxyquinoline). J Phys Chem B 2009; 113:14079-86. [DOI: 10.1021/jp905108x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ignacio Hernández
- Queen Mary University of London, Centre for Materials Research, Department of Physics, Mile End Road, London E1 4NS, United Kingdom
| | - William P. Gillin
- Queen Mary University of London, Centre for Materials Research, Department of Physics, Mile End Road, London E1 4NS, United Kingdom
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Structural, thermal, and spectral characterization of the different crystalline forms of Alq3, tris(quinolin-8-olato)aluminum(III), an electroluminescent material in OLED technology. Polyhedron 2009. [DOI: 10.1016/j.poly.2008.12.022] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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TOKITO S, TANAKA I. Phosphorescent Organic Light-emitting Devices: Triplet Energy Management. ELECTROCHEMISTRY 2008. [DOI: 10.5796/electrochemistry.76.24] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Xiang HF, Xu ZX, Roy VAL, Che CM, Lai PT. Method for measurement of the density of thin films of small organic molecules. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2007; 78:034104. [PMID: 17411199 DOI: 10.1063/1.2712932] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
An accurate and sensitive method is reported to measure the thin-film density of vacuum-deposited, small-molecular organic semiconductor materials. A spectrophotometer and surface profiler had been used to determine the mass and thickness of organic thin film, respectively. The calculated density of tris-(8-hydroxyquinolato) aluminum (Alq(3)) thin film was 1.31+/-0.01 gcm(3). Vacuum pressures and thin-film growth rates are found to have less impact on the thin-film density of organic material. However, the thin-film density of organic material strongly depends on its chemical structure and molecular weight. Specifically, the chemical structure determines the density of organic material that affects the molecular volume and intermolecular stacking.
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Affiliation(s)
- Hai-Feng Xiang
- Department of Electrical & Electronic Engineering, Department of Chemistry and HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
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Watanabe S, Furube A, Katoh R. Generation and Decay Dynamics of Triplet Excitons in Alq3 Thin Films under High-Density Excitation Conditions. J Phys Chem A 2006; 110:10173-8. [PMID: 16928104 DOI: 10.1021/jp0618227] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We studied the generation and decay dynamics of triplet excitons in tris-(8-hydroxyquinoline) aluminum (Alq3) thin films by using transient absorption spectroscopy. Absorption spectra of both singlet and triplet excitons in the film were identified by comparison with transient absorption spectra of the ligand molecule (8-hydroxyquinoline) itself and the excited triplet state in solution previously reported. By measuring the excitation light intensity dependence of the absorption, we found that exciton annihilation dominated under high-density excitation conditions. Annihilation rate constants were estimated to be gammaSS = (6 +/- 3) x 10(-11) cm3 s(-1) for single excitons and gammaTT = (4 +/- 2) x 10(-13) cm3 s(-1) for triplet excitons. From detailed analysis of the light intensity dependence of the quantum yield of triplet excitons under high-density conditions, triplet excitons were mainly generated through fission from highly excited singlet states populated by singlet-singlet exciton annihilation. We estimated that 30% of the highly excited states underwent fission.
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Affiliation(s)
- Sadayuki Watanabe
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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Montes VA, Pohl R, Shinar J, Anzenbacher P. Effective Manipulation of the Electronic Effects and Its Influence on the Emission of 5-Substituted Tris(8-quinolinolate) Aluminum(III) Complexes. Chemistry 2006; 12:4523-35. [PMID: 16619313 DOI: 10.1002/chem.200501403] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The unique electron-transport and emissive properties of tris(8-quinolinolate) aluminum(III) (Alq(3)) have resulted in extensive use of this material for small molecular organic light-emitting diode (OLED) fabrication. So far, efforts to prepare stable and easy-to-process red/green/blue (RGB)-emitting Alq(3) derivatives have met with only a limited success. In this paper, we describe how the electronic nature of various substituents, projected via an arylethynyl or aryl spacer to the position of the highest HOMO density (C5), may be used for effective emission tuning to obtain blue-, green-, and red-emitting materials. The synthetic strategy consists of four different pathways for the attachment of electron-donating and electron-withdrawing aryl or arylethynyl substituents to the 5-position of the quinolinolate ring. Successful tuning of the emission color covering the whole visible spectrum (lambda=450-800 nm) was achieved. In addition, the photophysical properties of the luminophores were found to correlate with the Hammett constant of the respective substituents, providing a powerful strategy with which to predict the optical properties of new materials. We also demonstrate that the electronic nature of the substituent affects the emission properties of the resulting complex through effective modification of the HOMO levels of the quinolinolate ligand.
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Affiliation(s)
- Victor A Montes
- Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University (BGSU), Bowling Green, OH 43403, USA
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Zhong G, Ding X, Zhou J, Jiang N, Huang W, Hou X. Temperature-dependent photoluminescence of organic light-emitting materials: Types and characteristics of excitons involved in the emitting process. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.01.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Arena A, Patanè S, Spadaro S, Saitta G. Solution-deposited microstructures based on aluminum-tris-hydroxyquinoline. Micron 2006; 37:533-7. [PMID: 16487714 DOI: 10.1016/j.micron.2006.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2005] [Revised: 01/05/2006] [Accepted: 01/08/2006] [Indexed: 10/25/2022]
Abstract
Iridescent organic films consisting of quasi-parallel wire-like microstructures are grown by castings from ethanol solutions containing mixtures of aluminium-tris-hydroxyquinoline and 1,10-phenanthroline. Spectrophotometric measurements carried out in the ultraviolet-visible range indicate that the microstructured films have angular-dependent optical behaviour, which is motivated by a refractive-index modulation over dimensions that are comparable to visible-light wavelengths. According to the results of investigations carried out by means of optical microscopy, atomic force microscopy (AFM), and scanning near-field optical microscopy (SNOM), the refractive-index modulation originates from a thickness modulation and a phase separation that occurs as the aluminium-tris-hydroxyquinoline and phenanthroline co-crystallize, with the former material being arranged to form a green luminescent pattern on the top of the latter one.
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Affiliation(s)
- A Arena
- Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Università di Messina, Contrada di Dio-S. Agata, 98166 Messina, Italy.
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