The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Jian Hao - One of the best experts on this subject based on the ideXlab platform.
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Studies of fluorine auxochrome in C9-fluorenyl Anthracenes on optoelectronic property for blue electroluminescent materials
Dyes and Pigments, 2018Co-Authors: Huaxin Zhao, Jing Wang, Haizhen Jiang, Jian Hao, Hongmei Deng, Wen WanAbstract:Abstract Two series of fluorine-containing fluorenyl Anthracenes linked by a rigid sp3-hybridized carbon atom have been synthesized and characterized. The effect of a fluorine auxochrome at different positions in fluorene moiety on bulk properties, such as photophysical, electrochemical properties and thermal stabilities were investigated. The non-doped organic light-emitting diodes (OLEDs) utilizing C9-methylated fluorinated fluorenyl anthracene 4b as the emitter exhibits deep-blue emissions CIE x, y (0.159, 0.106) with efficiency of 1.31 cd/A and a maximum brightness of 2040 cd/m2 at 14 V. It was found that the introduction of fluorine auxochrome to the C2 position of fluorene could afford the best performances of OLEDs among the fluorinated materials.
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novel blue luminescent materials for organic light emitting diodes based on c9 fluorenyl Anthracenes
Dyes and Pigments, 2013Co-Authors: Wen Wan, Jing Wang, Haizhen Jiang, Hua Chen, Shizheng Zhu, Jian HaoAbstract:Abstract A series of twisted fluorenyl Anthracenes linked by a rigid sp3-hybridized carbon atom, containing an end-capping aryl substituent at either the C2-position of fluorene or at the C10-position of anthracene, have been synthesized and characterized. These materials exhibited good thermal stabilities and amorphous properties. Theoretical calculations and X-ray diffraction studies revealed that the six blue emitters possess non-coplanar structures to suppress intermolecular interactions. The relationship between the chemical structures with different end-capping groups and the electroluminescent properties has been investigated. Organic light-emitting diodes utilizing 9-(2-phenyl-9H-fluoren-9-yl) anthracene as the emitter exhibited deep-blue emissions CIE x, y (0.166, 0.153) with a current efficiency of 1.47 cd/A, external quantum efficiency of 1.84% at 20 mA/cm2 and a maximum brightness of 3013 cd/m2 at 11 V. It was found that the introduction of the aryl substituents to the C2 position of fluorene could improve the performance of OLEDs based on C9-fluorenyl Anthracenes.
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c 9 fluorenyl substituted Anthracenes a promising new family of blue luminescent materials
Organic Letters, 2010Co-Authors: Jing Wang, Wen Wan, Haizhen Jiang, Yan Gao, Xueyin Jiang, Huaping Lin, Weiming Zhao, Jian HaoAbstract:Syntheses, optical, and electrochemical properties of novel C-9 fluorenyl substituted Anthracenes linked by a tetrahedral sp3-hybridized carbon atom are reported for blue light emitting materials. Remarkably, an unoptimized organic light-emitting diode based on 1-fold fluorene-functionalized anthracene 3 exhibits a radiance of 4100 cd/m2 at 12 V and a maximum EL efficiency of 1.36 cd/A with color purity CIE x, y (0.157, 0.082), which is very close to the National Television System Committee standard blue.
Richard G. Compton - One of the best experts on this subject based on the ideXlab platform.
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marcus theory of outer sphere heterogeneous electron transfer reactions dependence of the standard electrochemical rate constant on the hydrodynamic radius from high precision measurements of the oxidation of anthracene and its derivatives in nonaque
Journal of the American Chemical Society, 2004Co-Authors: Antony D Clegg, Barry A Coles, Neil V. Rees, Oleksiy V Klymenko, Richard G. ComptonAbstract:The validity of Marcus theory for outer-sphere heterogeneous electron transfer for the electro-oxidation of a range of anthracene derivatives in alkyl cyanide solvents is investigated. The precision measurement of these fast electron transfers (k0 ≥ 1 cm s-1) is achieved by use of the high-speed channel electrode and, where necessary, fast-scan cyclic voltammetry. First, the solvent effect on the rate of electron transfer is studied by considering the first oxidation wave of 9,10-diphenylanthracene in the alkyl cyanide solvents: acetonitrile, propionitrile, butyronitrile, and valeronitrile. Second, the variation of k0 for a series of substituted Anthracenes is investigated by analyzing the voltammetric response of the one-electron oxidations of 9-phenylanthracene, 9,10-dichloroanthracene, 9-chloroanthracene, 9,10-dicyanoanthracene, 9-cyanoanthracene, 9-nitroanthracene, 9,10-diphenylanthracene, and anthracene in acetonitrile. It is shown that the rate of electron transfer of a single compound in different...
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marcus theory of outer sphere heterogeneous electron transfer reactions dependence of the standard electrochemical rate constant on the hydrodynamic radius from high precision measurements of the oxidation of anthracene and its derivatives in nonaque
Journal of the American Chemical Society, 2004Co-Authors: Antony D Clegg, Barry A Coles, Neil V. Rees, Oleksiy V Klymenko, Richard G. ComptonAbstract:The validity of Marcus theory for outer-sphere heterogeneous electron transfer for the electro-oxidation of a range of anthracene derivatives in alkyl cyanide solvents is investigated. The precision measurement of these fast electron transfers (k(0) >or= 1 cm s(-1)) is achieved by use of the high-speed channel electrode and, where necessary, fast-scan cyclic voltammetry. First, the solvent effect on the rate of electron transfer is studied by considering the first oxidation wave of 9,10-diphenylanthracene in the alkyl cyanide solvents: acetonitrile, propionitrile, butyronitrile, and valeronitrile. Second, the variation of k(0) for a series of substituted Anthracenes is investigated by analyzing the voltammetric response of the one-electron oxidations of 9-phenylanthracene, 9,10-dichloroanthracene, 9-chloroanthracene, 9,10-dicyanoanthracene, 9-cyanoanthracene, 9-nitroanthracene, 9,10-diphenylanthracene, and anthracene in acetonitrile. It is shown that the rate of electron transfer of a single compound in different alkyl cyanides is determined by the longitudinal dielectric relaxation properties of the solvent, while differences in rate between the substituted Anthracenes in acetonitrile can be quantitatively rationalized by considering their relative hydrodynamic radii. This makes possible the accurate prediction of electron-transfer rates for a molecule by interpolation of rate constants known for related molecules.
Wen Wan - One of the best experts on this subject based on the ideXlab platform.
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Studies of fluorine auxochrome in C9-fluorenyl Anthracenes on optoelectronic property for blue electroluminescent materials
Dyes and Pigments, 2018Co-Authors: Huaxin Zhao, Jing Wang, Haizhen Jiang, Jian Hao, Hongmei Deng, Wen WanAbstract:Abstract Two series of fluorine-containing fluorenyl Anthracenes linked by a rigid sp3-hybridized carbon atom have been synthesized and characterized. The effect of a fluorine auxochrome at different positions in fluorene moiety on bulk properties, such as photophysical, electrochemical properties and thermal stabilities were investigated. The non-doped organic light-emitting diodes (OLEDs) utilizing C9-methylated fluorinated fluorenyl anthracene 4b as the emitter exhibits deep-blue emissions CIE x, y (0.159, 0.106) with efficiency of 1.31 cd/A and a maximum brightness of 2040 cd/m2 at 14 V. It was found that the introduction of fluorine auxochrome to the C2 position of fluorene could afford the best performances of OLEDs among the fluorinated materials.
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novel blue luminescent materials for organic light emitting diodes based on c9 fluorenyl Anthracenes
Dyes and Pigments, 2013Co-Authors: Wen Wan, Jing Wang, Haizhen Jiang, Hua Chen, Shizheng Zhu, Jian HaoAbstract:Abstract A series of twisted fluorenyl Anthracenes linked by a rigid sp3-hybridized carbon atom, containing an end-capping aryl substituent at either the C2-position of fluorene or at the C10-position of anthracene, have been synthesized and characterized. These materials exhibited good thermal stabilities and amorphous properties. Theoretical calculations and X-ray diffraction studies revealed that the six blue emitters possess non-coplanar structures to suppress intermolecular interactions. The relationship between the chemical structures with different end-capping groups and the electroluminescent properties has been investigated. Organic light-emitting diodes utilizing 9-(2-phenyl-9H-fluoren-9-yl) anthracene as the emitter exhibited deep-blue emissions CIE x, y (0.166, 0.153) with a current efficiency of 1.47 cd/A, external quantum efficiency of 1.84% at 20 mA/cm2 and a maximum brightness of 3013 cd/m2 at 11 V. It was found that the introduction of the aryl substituents to the C2 position of fluorene could improve the performance of OLEDs based on C9-fluorenyl Anthracenes.
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c 9 fluorenyl substituted Anthracenes a promising new family of blue luminescent materials
Organic Letters, 2010Co-Authors: Jing Wang, Wen Wan, Haizhen Jiang, Yan Gao, Xueyin Jiang, Huaping Lin, Weiming Zhao, Jian HaoAbstract:Syntheses, optical, and electrochemical properties of novel C-9 fluorenyl substituted Anthracenes linked by a tetrahedral sp3-hybridized carbon atom are reported for blue light emitting materials. Remarkably, an unoptimized organic light-emitting diode based on 1-fold fluorene-functionalized anthracene 3 exhibits a radiance of 4100 cd/m2 at 12 V and a maximum EL efficiency of 1.36 cd/A with color purity CIE x, y (0.157, 0.082), which is very close to the National Television System Committee standard blue.
Antony D Clegg - One of the best experts on this subject based on the ideXlab platform.
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marcus theory of outer sphere heterogeneous electron transfer reactions dependence of the standard electrochemical rate constant on the hydrodynamic radius from high precision measurements of the oxidation of anthracene and its derivatives in nonaque
Journal of the American Chemical Society, 2004Co-Authors: Antony D Clegg, Barry A Coles, Neil V. Rees, Oleksiy V Klymenko, Richard G. ComptonAbstract:The validity of Marcus theory for outer-sphere heterogeneous electron transfer for the electro-oxidation of a range of anthracene derivatives in alkyl cyanide solvents is investigated. The precision measurement of these fast electron transfers (k0 ≥ 1 cm s-1) is achieved by use of the high-speed channel electrode and, where necessary, fast-scan cyclic voltammetry. First, the solvent effect on the rate of electron transfer is studied by considering the first oxidation wave of 9,10-diphenylanthracene in the alkyl cyanide solvents: acetonitrile, propionitrile, butyronitrile, and valeronitrile. Second, the variation of k0 for a series of substituted Anthracenes is investigated by analyzing the voltammetric response of the one-electron oxidations of 9-phenylanthracene, 9,10-dichloroanthracene, 9-chloroanthracene, 9,10-dicyanoanthracene, 9-cyanoanthracene, 9-nitroanthracene, 9,10-diphenylanthracene, and anthracene in acetonitrile. It is shown that the rate of electron transfer of a single compound in different...
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marcus theory of outer sphere heterogeneous electron transfer reactions dependence of the standard electrochemical rate constant on the hydrodynamic radius from high precision measurements of the oxidation of anthracene and its derivatives in nonaque
Journal of the American Chemical Society, 2004Co-Authors: Antony D Clegg, Barry A Coles, Neil V. Rees, Oleksiy V Klymenko, Richard G. ComptonAbstract:The validity of Marcus theory for outer-sphere heterogeneous electron transfer for the electro-oxidation of a range of anthracene derivatives in alkyl cyanide solvents is investigated. The precision measurement of these fast electron transfers (k(0) >or= 1 cm s(-1)) is achieved by use of the high-speed channel electrode and, where necessary, fast-scan cyclic voltammetry. First, the solvent effect on the rate of electron transfer is studied by considering the first oxidation wave of 9,10-diphenylanthracene in the alkyl cyanide solvents: acetonitrile, propionitrile, butyronitrile, and valeronitrile. Second, the variation of k(0) for a series of substituted Anthracenes is investigated by analyzing the voltammetric response of the one-electron oxidations of 9-phenylanthracene, 9,10-dichloroanthracene, 9-chloroanthracene, 9,10-dicyanoanthracene, 9-cyanoanthracene, 9-nitroanthracene, 9,10-diphenylanthracene, and anthracene in acetonitrile. It is shown that the rate of electron transfer of a single compound in different alkyl cyanides is determined by the longitudinal dielectric relaxation properties of the solvent, while differences in rate between the substituted Anthracenes in acetonitrile can be quantitatively rationalized by considering their relative hydrodynamic radii. This makes possible the accurate prediction of electron-transfer rates for a molecule by interpolation of rate constants known for related molecules.
Jing Wang - One of the best experts on this subject based on the ideXlab platform.
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Studies of fluorine auxochrome in C9-fluorenyl Anthracenes on optoelectronic property for blue electroluminescent materials
Dyes and Pigments, 2018Co-Authors: Huaxin Zhao, Jing Wang, Haizhen Jiang, Jian Hao, Hongmei Deng, Wen WanAbstract:Abstract Two series of fluorine-containing fluorenyl Anthracenes linked by a rigid sp3-hybridized carbon atom have been synthesized and characterized. The effect of a fluorine auxochrome at different positions in fluorene moiety on bulk properties, such as photophysical, electrochemical properties and thermal stabilities were investigated. The non-doped organic light-emitting diodes (OLEDs) utilizing C9-methylated fluorinated fluorenyl anthracene 4b as the emitter exhibits deep-blue emissions CIE x, y (0.159, 0.106) with efficiency of 1.31 cd/A and a maximum brightness of 2040 cd/m2 at 14 V. It was found that the introduction of fluorine auxochrome to the C2 position of fluorene could afford the best performances of OLEDs among the fluorinated materials.
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novel blue luminescent materials for organic light emitting diodes based on c9 fluorenyl Anthracenes
Dyes and Pigments, 2013Co-Authors: Wen Wan, Jing Wang, Haizhen Jiang, Hua Chen, Shizheng Zhu, Jian HaoAbstract:Abstract A series of twisted fluorenyl Anthracenes linked by a rigid sp3-hybridized carbon atom, containing an end-capping aryl substituent at either the C2-position of fluorene or at the C10-position of anthracene, have been synthesized and characterized. These materials exhibited good thermal stabilities and amorphous properties. Theoretical calculations and X-ray diffraction studies revealed that the six blue emitters possess non-coplanar structures to suppress intermolecular interactions. The relationship between the chemical structures with different end-capping groups and the electroluminescent properties has been investigated. Organic light-emitting diodes utilizing 9-(2-phenyl-9H-fluoren-9-yl) anthracene as the emitter exhibited deep-blue emissions CIE x, y (0.166, 0.153) with a current efficiency of 1.47 cd/A, external quantum efficiency of 1.84% at 20 mA/cm2 and a maximum brightness of 3013 cd/m2 at 11 V. It was found that the introduction of the aryl substituents to the C2 position of fluorene could improve the performance of OLEDs based on C9-fluorenyl Anthracenes.
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c 9 fluorenyl substituted Anthracenes a promising new family of blue luminescent materials
Organic Letters, 2010Co-Authors: Jing Wang, Wen Wan, Haizhen Jiang, Yan Gao, Xueyin Jiang, Huaping Lin, Weiming Zhao, Jian HaoAbstract:Syntheses, optical, and electrochemical properties of novel C-9 fluorenyl substituted Anthracenes linked by a tetrahedral sp3-hybridized carbon atom are reported for blue light emitting materials. Remarkably, an unoptimized organic light-emitting diode based on 1-fold fluorene-functionalized anthracene 3 exhibits a radiance of 4100 cd/m2 at 12 V and a maximum EL efficiency of 1.36 cd/A with color purity CIE x, y (0.157, 0.082), which is very close to the National Television System Committee standard blue.