Patent application number | Description | Published |
20080206598 | Light-emitting element using spirofluorene derivative and electronic appliance - It is an object to provide a light-emitting element with high luminous efficiency by using a hole transporting substance with a sufficiently high T | 08-28-2008 |
20080217608 | Light-Emitting Element, Light-Emitting Device, Electronic Device and Quinoxaline Derivative - The present invention provides light-emitting element having long lifetime, and light-emitting devices and electronic devices having long lifetime. A light-emitting element comprises a first layer and a second layer including a light-emitting substance between a first electrode and a second electrode. The first layer includes a first organic compound and a second organic compound, the first layer is formed between the second layer and the second electrode, the first layer includes the first organic compound more than the second organic compound, the first organic compound is an organic compound having an electron-transporting property, the second organic compound is an organic compound having an electron-trapping property, an energy gap of the second organic compound is larger than that of the light-emitting substance; and a voltage is applied such that a potential of the first electrode is higher than that of the second electrode, so that the light-emitting layer emits light. | 09-11-2008 |
20080231177 | Light-Emitting Device and Electronic Device - The present invention provides light-emitting devices having excellent characteristics and electronic devices having excellent characteristics, having such light-emitting devices. Specifically, the present invention provides a light-emitting device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element which emit light having different color from each other. The first light-emitting element includes a first anode; a first cathode; and a first light-emitting layer and a second light-emitting layer between the first anode and the first cathode, wherein the first light-emitting layer includes a first high light-emitting substance and a first organic compound, and the second light-emitting layer includes the first high light-emitting substance and a second organic compound, wherein the first light-emitting layer is in contact with the first anode side of the second light-emitting layer, and wherein the first organic compound is an organic compound having a hole-transporting property and the second organic compound is an organic compound having an electron-transporting property. The second light-emitting element includes a second anode; a second cathode; and a third light-emitting layer and a layer for controlling carrier transfer between the second anode and the second cathode, wherein the third light-emitting layer includes a second high light-transmitting substance, wherein the layer for controlling carrier transfer includes a third organic compound and a fourth organic compound, and is provided between the third light-emitting layer and the second cathode, wherein the third organic compound is an organic compound having an electron-transporting property and the fourth organic compound is an organic compound having an electron-trapping property; and wherein the third organic compound is included more than the fourth organic compound in the layer for controlling carrier transfer. The third light-emitting element includes a third anode; a third cathode; and a fourth light-emitting layer, wherein the fourth light-emitting layer includes a fifth organic compound, a sixth organic compound, and a third high light-emitting substance, wherein the fifth organic compound is an organic compound having a hole-transporting property, and the sixth organic compound is an organic compound having an electron-transporting property, and wherein the third high light-emitting substance is a substance which emits phosphorescence. | 09-25-2008 |
20080242871 | Organic compound, anthracene derivative, and light-emitting element, light-emitting device, and electronic device using anthracene derivative - Objects of the present invention are to provide novel anthracene derivatives and novel organic compounds; a light-emitting element that has high emission efficiency; a light-emitting element that is capable of emitting blue light with high luminous efficiency; a light-emitting element that is capable of operation for a long time; and a light-emitting device and an electronic device that have lower power consumption. An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (17) are provided. A light-emitting element that has high emission efficiency can be obtained by use of the anthracene derivative represented by the general formula (1). Further, a light-emitting element that has a long life can be obtained by use of the anthracene derivative represented by the general formula (1). | 10-02-2008 |
20080268284 | ORGANIC COMPOUND, ANTHRACENE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE IN WHICH THE ANTHRACENE DERIVATIVE IS USED - An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (8) are provided. Further, by use of the anthracene derivative represented by the general formula (1), a light-emitting element with high emission efficiency can be obtained. Furthermore, by use of the anthracene derivative represented by the general formula (1), a light-emitting element that emits blue light with high color purity can be obtained. | 10-30-2008 |
20080286607 | Triazole derivative, and light-emitting device, and electronic device with the use of triazole derivative - It is an object of the present invention to provide a novel triazole derivative. Further, it is another object of the present invention to provide a light-emitting element having high luminous efficiency with the use of the novel triazole derivative. Moreover, it is still another object of the present invention to provide a light-emitting device and electronic devices which have low power consumption. A light-emitting element having high luminous efficiency can be manufactured with the use of a triazole derivative which is a 1,2,4-triazole derivative, in which an aryl group or a heteroaryl group is bonded to each of 3-position, 4-position, and 5-position, and in which any one of the aryl group or heteroaryl group has a 9H-carbazol-9-yl group. | 11-20-2008 |
20080312454 | Aromatic amine compound, and light emitting element, light emitting device, and electronic device using aromatic amine compound - An object is to provide an aromatic amine compound with excellent heat resistance. Another object is to provide a light emitting element, a light emitting device, and an electronic device with excellent heat resistance. An aromatic amine compound represented by General Formula (1) is provided. The aromatic amine compound represented by General Formula (1) has a high glass transition point and excellent heat resistance. By using the aromatic amine compound represented by General Formula (1) for a light emitting element, a light emitting device, and an electronic device, a light emitting element, a light emitting device, and an electronic device with excellent heat resistance can be obtained. | 12-18-2008 |
20090004506 | Anthracene Derivatives and Light-Emitting Devices Using the Anthracene Derivatives - The present invention provides novel anthracene derivatives. In particular, the present invention provides light-emitting elements with high luminous efficiency, and light-emitting elements with long lifetime. Further, the present invention provides light-emitting devices and electronic devices having long lifetime by using these light-emitting elements. An anthracene derivative represented by the general formula (1) is provided. In addition, since the anthracene derivative represented by the general formula (1) has high luminous efficiency, a light-emitting element using the anthracene derivative represented by the general formula (1) can also have high luminous efficiency. By using the anthracene derivative represented by the general formula (1), light-emitting elements with long lifetime can be provided. | 01-01-2009 |
20090072718 | Quinoxaline derivative, and light-emitting element, light-emitting device, and electronic device including quinoxaline derivative - An object of the present invention is to provide a quinoxaline derivative represented by a general formula (1). Ar | 03-19-2009 |
20090146558 | Stilbene Derivatives, Light-Emitting Element and Light-Emitting Device - The present invention provides a novel substance having an excellent color purity of blue, a light-emitting element and a light-emitting device using the novel substance. A stilbene derivative has a structure shown by the general formula (1). In the general formula (1), R | 06-11-2009 |
20090322211 | Light-Emitting Material, Light-Emitting Device, and Electronic Apparatus - It is an object to provide a light-emitting material that does not easily deteriorate. It is another object to provide a light-emitting device having superiority in reliability. It is found that a light-emitting material that has superiority in a carrier-transporting property and does not easily deteriorate can be obtained by introducing a substituent that makes oxygen to be not easily added to an anthracene derivative. By using such a light-emitting material, a light-emitting device having superiority in reliability can be obtained. | 12-31-2009 |
20100001638 | AROMATIC AMINE COMPOUND, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC APPLIANCE USING THE AROMATIC AMINE COMPOUND - An object of the present invention is to provide a novel aromatic amine compound, and a light-emitting element, a light-emitting device, and an electronic appliance with high luminous efficiency. An aromatic amine compound expressed by General Formula (1) and a light-emitting element, a light-emitting device, and an electronic appliance formed using the aromatic amine compound expressed by General Formula (1) are provided. By the use of the aromatic amine compound expressed by General Formula (1), the light-emitting element, the light-emitting device, and the electronic appliance can have high luminous efficiency. | 01-07-2010 |
20100141130 | QUINOXALINE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE USING THE QUINOXALINE DERIVATIVE - It is an object to provide a novel bipolar organic compound. In particular, it is an object to provide a bipolar organic compound excellent in thermal stability. Further, it is another object to provide a bipolar organic compound which is electrochemically stable. A quinoxaline derivative represented by a general formula (1) is provided. Further, since the quinoxaline derivative represented by the general formula (1) is bipolar, the use of the quinoxaline derivative of the present invention allows fabrication of a light-emitting element and a light-emitting device with a low driving voltage and low power consumption. Furthermore, a light-emitting element with high luminous efficiency can be obtained. | 06-10-2010 |
20100164376 | Anthracene Derivative, and Light Emitting Element, Light Emitting Device, Electronic Device Using Anthracene Derivative - A novel anthracene derivative represented by General Formula (1) is provided, which enables the production of a light-emitting element with high luminous efficiency and a long lifetime. A high-performance light-emitting device and electronic device in which the anthracene derivative is employed are also disclosed. The anthracene derivative of the present invention is represented by General Formula (1), in which the unit A represents any one of substituents represented by General Formulae (1-1) to (1-3). The variables shown in Formulae (1) and (1-1) to (1-3) are defined in the specification. | 07-01-2010 |
20100200847 | ORGANIC COMPOUND, ANTHRACENE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE USING ANTHRACENE DERIVATIVE - Objects of the present invention are to provide novel anthracene derivatives and novel organic compounds; a light-emitting element that has high emission efficiency; a light-emitting element that is capable of emitting blue light with high luminous efficiency; a light-emitting element that is capable of operation for a long time; and a light-emitting device and an electronic device that have lower power consumption. An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (17) are provided. A light-emitting element that has high emission efficiency can be obtained by use of the anthracene derivative represented by the general formula (1). Further, a light-emitting element that has a long life can be obtained by use of the anthracene derivative represented by the general formula (1). | 08-12-2010 |
20100244693 | SPIROFLUORENE DERIVATIVE, MATERIAL FOR LIGHT-EMITTING ELEMENT, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE - It is an object of the present invention to provide a material having a high Tg and a wide energy gap. The present invention provides a spirofluorene derivative represented by General Formula 1. (In the formula, R | 09-30-2010 |
20100301322 | Stilbene Derivatives, Light-Emitting Element, Display Device, and Electronic Device - A novel stilbene derivative is provided with motivation of providing a blue emissive material showing excellent color purity. The use of the stilbene derivative of the present invention allows the fabrication of a blue-emissive light-emitting element with excellent color purity. The invention also includes an electronic device equipped with a display portion in which the stilbene derivative is employed. The stilbene derivative of the present invention is represented by formula (1), in which Ar | 12-02-2010 |
20100308319 | AROMATIC AMINE COMPOUND, AND LIGHT EMITTING ELEMENT, LIGHT EMITTING DEVICE, AND ELECTRONIC DEVICE USING AROMATIC AMINE COMPOUND - An object is to provide an aromatic amine compound with excellent heat resistance. Another object is to provide a light emitting element, a light emitting device, and an electronic device with excellent heat resistance. An aromatic amine compound represented by General Formula (1) is provided. The aromatic amine compound represented by General Formula (1) has a high glass transition point and excellent heat resistance. By using the aromatic amine compound represented by General Formula (1) for a light emitting element, a light emitting device, and an electronic device, a light emitting element, a light emitting device, and an electronic device with excellent heat resistance can be obtained. | 12-09-2010 |
20110050118 | METHOD FOR SYNTHESIZING ANTHRACENE DERIVATIVE AND ANTHRACENE DERIVATIVE, LIGHT EMITTING ELEMENT, LIGHT EMITTING DEVICE, ELECTRONIC DEVICE - It is an object to provide a novel method for synthesizing an anthracene derivative with the small number of steps. It is another object to provide a novel anthracene derivative. It is further another object to provide a light-emitting element, a light-emitting device, and an electronic device, each using the anthracene derivative. A method for synthesizing an anthracene derivative represented by a general formula (1) is provided by coupling a 9-arylanthracene derivative having an active site at a 10-position with a 9-arylcarbazole derivative having an active site in an aryl group using metal, a metal compound, or a metal catalyst. | 03-03-2011 |
20110062428 | Anthracene Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device Using Anthracene Derivative - An object is to provide a novel anthracene derivative. Another object is to provide a light-emitting element with high luminous efficiency. Yet another object is to provide a light-emitting element with a long lifetime. Still another object is to provide a light-emitting device and an electronic device having a long lifetime by using the light-emitting elements of the present invention. The anthracene derivative represented by General Formula (1) is provided. The ability of the anthracene derivative represented by General Formula (1) to exhibit high luminous efficiency allows the production of a light-emitting element with high luminous efficiency and a long lifetime. | 03-17-2011 |
20110121275 | Anthracene Derivative, and Light Emitting Element, Light Emitting Device, and Electronic Device Using the Anthracene Derivative - It is an object to provide a noble anthracene derivative, a light emitting element with a high luminous efficiency, and further a light emitting element with a long lifetime. It is another object to provide a light emitting device and electronic device with a long lifetime by using the light emitting element. An anthracene derivative represented by General Formula (1) is provided. Since the anthracene derivative represented by General Formula (1) has a high luminous efficiency, when the anthracene derivative is used for a light emitting element, the light emitting element can have a high luminous efficiency. Further, when the anthracene derivative represented by General Formula (1) is used for a light emitting element, the light emitting element can have a long lifetime. | 05-26-2011 |
20110121721 | Light-Emitting Element, Light-Emitting Device, Electronic Device and Quinoxaline Derivative - The present invention provides light-emitting element having long lifetime, and light-emitting devices and electronic devices having long lifetime. A light-emitting element comprises a first layer and a second layer including a light-emitting substance between a first electrode and a second electrode. The first layer includes a first organic compound and a second organic compound, the first layer is formed between the second layer and the second electrode, the first layer includes the first organic compound more than the second organic compound, the first organic compound is an organic compound having an electron-transporting property, the second organic compound is an organic compound having an electron-trapping property, an energy gap of the second organic compound is larger than that of the light-emitting substance; and a voltage is applied such that a potential of the first electrode is higher than that of the second electrode, so that the light-emitting layer emits light. | 05-26-2011 |
20110147728 | SPIROFLUORENE DERIVATIVE, MATERIAL FOR LIGHT-EMITTING ELEMENT, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE - It is an object of the present invention to provide a material having a high Tg and a wide energy gap. The present invention provides a spirofluorene derivative represented by General Formula 1. (In the formula, R | 06-23-2011 |
20110147729 | Stilbene Derivatives, Light-Emitting Element and Light-Emitting Device - The present invention provides a novel substance having an excellent color purity of blue, a light-emitting element and a light-emitting device using the novel substance. A stilbene derivative has a structure shown by the general formula (1). In the general formula (1), R | 06-23-2011 |
20110147730 | CARBAZOLE DERIVATIVE, AND LIGHT EMITTING ELEMENT AND LIGHT EMITTING DEVICE USING THE CARBAZOLE DERIVATIVE - It is an object of the present invention to provide a material which is excellent in a hole injecting property and a hole transporting property, and to provide a light emitting element and a light emitting device using a material which is excellent in a hole injecting property and a hole transporting property. The present invention provides a carbazole derivative represented by a general formula (1). The carbazole derivative according to the present invention is excellent in the hole injecting property. By using the carbazole derivative according to the present invention as a hole injecting material for a hole injecting layer of a light emitting element, a driving voltage can be reduced. In addition, a lower driving voltage, improvement of the luminous efficiency, a longer life time, and higher reliability can be realized by applying the material to a light emitting element or a light emitting device. | 06-23-2011 |
20110186825 | Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Appliance Using the Same - A quinoxaline derivative expressed by the general formula (1) is provided. (Each of R | 08-04-2011 |
20110248254 | QUINOXALINE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE USING THE QUINOXALINE DERIVATIVE - It is an object to provide a novel bipolar organic compound. In particular, it is an object to provide a bipolar organic compound excellent in thermal stability. Further, it is another object to provide a bipolar organic compound which is electrochemically stable. A quinoxaline derivative represented by a general formula (1) is provided. Further, since the quinoxaline derivative represented by the general formula (1) is bipolar, the use of the quinoxaline derivative of the present invention allows fabrication of a light-emitting element and a light-emitting device with a low driving voltage and low power consumption. Furthermore, a light-emitting element with high luminous efficiency can be obtained. | 10-13-2011 |
20120007066 | ANTHRACENE DERIVATIVE, MATERIAL FOR LIGHT EMITTING ELEMENT, LIGHT EMITTING ELEMENT, LIGHT EMITTING DEVICE, AND ELECTRONIC DEVICE - It is an object of the present invention to provide a novel material capable of realizing excellent color purity of blue, and a light emitting element and a light emitting device using the novel material. Further, it is an object of the present invention to provide which is highly reliable, and a light emitting element and a light emitting device using the novel material. The structure for solving the above problems in accordance with the present invention is an anthracene derivative simultaneously having a diphenylanthracene structure and a carbazole skeleton in a molecule as represented by structural formula (1): | 01-12-2012 |
20120104379 | ORGANIC COMPOUND, ANTHRACENE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE USING ANTHRACENE DERIVATIVE - Objects of the present invention are to provide novel anthracene derivatives and novel organic compounds; a light-emitting element that has high emission efficiency; a light-emitting element that is capable of emitting blue light with high luminous efficiency; a light-emitting element that is capable of operation for a long time; and a light-emitting device and an electronic device that have lower power consumption. An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (17) are provided. A light-emitting element that has high emission efficiency can be obtained by use of the anthracene derivative represented by the general formula (1). Further, a light-emitting element that has a long life can be obtained by use of the anthracene derivative represented by the general formula (1). | 05-03-2012 |
20120126215 | Anthracene Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device Using Anthracene Derivative - An object is to provide a novel anthracene derivative. Another object is to provide a light-emitting element with high luminous efficiency. Yet another object is to provide a light-emitting element with a long lifetime. Still another object is to provide a light-emitting device and an electronic device having a long lifetime by using the light-emitting elements of the present invention. The anthracene derivative represented by General Formula (1) is provided. The ability of the anthracene derivative represented by General Formula (1) to exhibit high luminous efficiency allows the production of a light-emitting element with high luminous efficiency and a long lifetime. | 05-24-2012 |
20120168741 | Stilbene Derivatives, Light-Emitting Element, Display Device, and Electronic Device - A novel stilbene derivative is provided with motivation of providing a blue emissive material showing excellent color purity. The use of the stilbene derivative of the present invention allows the fabrication of a blue-emissive light-emitting element with excellent color purity. The invention also includes an electronic device equipped with a display portion in which the stilbene derivative is employed. The stilbene derivative of the present invention is represented by formula (1), in which Ar | 07-05-2012 |
20120181523 | AROMATIC AMINE COMPOUND, AND LIGHT EMITTING ELEMENT, LIGHT EMITTING DEVICE, AND ELECTRONIC DEVICE USING AROMATIC AMINE COMPOUND - An object is to provide an aromatic amine compound with excellent heat resistance. Another object is to provide a light emitting element, a light emitting device, and an electronic device with excellent heat resistance. An aromatic amine compound represented by General Formula (1) is provided. The aromatic amine compound represented by General Formula (1) has a high glass transition point and excellent heat resistance. By using the aromatic amine compound represented by General Formula (1) for a light emitting element, a light emitting device, and an electronic device, a light emitting element, a light emitting device, and an electronic device with excellent heat resistance can be obtained. | 07-19-2012 |
20120211738 | Quinoxaline Derivative, and Light Emitting Element, Light Emitting Device, and Electronic Appliance Using the Same - A quinoxaline derivative expressed by the general formula (1) is provided. (Each of R | 08-23-2012 |
20120235130 | Stilbene Derivatives, Light-Emitting Element and Light-Emitting Device - The present invention provides a novel substance having an excellent color purity of blue, a light-emitting element and a light-emitting device using the novel substance. A stilbene derivative has a structure shown by the general formula (1). In the general formula (1), R | 09-20-2012 |
20120309984 | ORGANIC COMPOUND, ANTHRACENE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE USING ANTHRACENE DERIVATIVE - Objects of the present invention are to provide novel anthracene derivatives and novel organic compounds; a light-emitting element that has high emission efficiency; a light-emitting element that is capable of emitting blue light with high luminous efficiency; a light-emitting element that is capable of operation for a long time; and a light-emitting device and an electronic device that have lower power consumption. An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (17) are provided. A light-emitting element that has high emission efficiency can be obtained by use of the anthracene derivative represented by the general formula (1). Further, a light-emitting element that has a long life can be obtained by use of the anthracene derivative represented by the general formula (1). | 12-06-2012 |
20130200344 | Oxadiazole Derivative, and Light Emitting Element, Light Emitting Device, and Electronic Device Using the Oxadiazole Derivative - An oxadiazole derivative represented by the following general formula (G1) is synthesized and applied to the light emitting element, | 08-08-2013 |
20130306941 | Anthracene Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device Using Anthracene Derivative - An object is to provide a novel anthracene derivative. Another object is to provide a light-emitting element with high luminous efficiency. Yet another object is to provide a light-emitting element with a long lifetime. Still another object is to provide a light-emitting device and an electronic device having a long lifetime by using the light-emitting elements of the present invention. The anthracene derivative represented by General Formula (1) is provided. The ability of the anthracene derivative represented by General Formula (1) to exhibit high luminous efficiency allows the production of a light-emitting element with high luminous efficiency and a long lifetime. | 11-21-2013 |
20130323870 | ORGANIC COMPOUND, ANTHRACENE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE USING THE ANTHRACENE DERIVATIVE - Objects of the present invention are to provide novel anthracene derivatives and novel organic compounds; a light-emitting element that has high emission efficiency; a light-emitting element that is capable of emitting blue light with high luminous efficiency; a light-emitting element that is capable of operation for a long time; and a light-emitting device and an electronic device that have lower power consumption. An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (17) are provided. A light-emitting element that has high emission efficiency can be obtained by use of the anthracene derivative represented by the general formula (1). Further, a light-emitting element that has a long life can be obtained by use of the anthracene derivative represented by the general formula (1). | 12-05-2013 |
20140213798 | SPIROFLUORENE DERIVATIVE, MATERIAL FOR LIGHT-EMITTING ELEMENT, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE - It is an object of the present invention to provide a material having a high Tg and a wide energy gap. The present invention provides a spirofluorene derivative represented by General Formula 1. (In the formula, R | 07-31-2014 |
20140299822 | Oxadiazole Derivative, and Light Emitting Element, Light Emitting Device, and Electronic Device Using the Oxadiazole Derivative - An oxadiazole derivative represented by the following general formula (G1) is synthesized and applied to the light emitting element, | 10-09-2014 |
20140364626 | Anthracene Derivative, Light Emitting Element Using the Same, and Light Emitting Device Using the Same - It is an object of the present invention to provide a light emitting element, which is resistant to repetition of an oxidation reaction. It is another object of the invention to provide a light emitting element, which is resistant to repetition of a reduction reaction. An anthracene derivative is represented by a general formula (1). In the general formula (1), R1 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, R2 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms and an aryl group having 6 to 12 carbon atoms, R3 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and an aryl group having 6 to 12 carbon atoms, Ph1 represents a phenyl group, and X1 represents an arylene group having 6 to 15 carbon atoms. | 12-11-2014 |