Patents by Inventor Yasuchika Hasegawa
Yasuchika Hasegawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230089029Abstract: Disclosed is a rare earth complex including: one or a plurality of rare earth ions; and a ligand forming a coordinate bond with the rare earth ions. At least a part of the rare earth ions are at least one kind selected from the group consisting of lutetium(III) ions, yttrium(III) ions, and gadolinium(III) ions. The ligand includes a residue obtained by removing one or more hydrogen atoms from a fluorescent condensed polycyclic aromatic compound.Type: ApplicationFiled: December 23, 2020Publication date: March 23, 2023Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yuichi KITAGAWA, Ayu NAITO, Yasuchika HASEGAWA, Koji FUSHIMI
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Patent number: 11499093Abstract: A rare earth complex including a rare earth ion and a ligand coordinated with the rare earth ion and having a condensed polycyclic aromatic group.Type: GrantFiled: February 22, 2018Date of Patent: November 15, 2022Assignee: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yuichi Kitagawa, Fumiya Suzue, Takayuki Nakanishi, Koji Fushimi, Yasuchika Hasegawa
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Publication number: 20220315613Abstract: Disclosed is a rare earth complex having a rare earth ion and a phosphine oxide ligand that is coordinated with the rare earth ion and is represented by the following formula (I): wherein R1, R2, R3, R4, R5, and R6 each independently represent an alkyl group which may have a substituent.Type: ApplicationFiled: April 23, 2020Publication date: October 6, 2022Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yuichi KITAGAWA, Kaori SHIMA, Satoshi WADA, Yasuchika HASEGAWA, Koji FUSHIMI
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Publication number: 20220089942Abstract: A rare earth compound including: one or a plurality of rare earth ions; and a ligand coordinated with the rare earth ion and having a condensed polycyclic aromatic group. At least part of the rare earth ions is a terbium(III) ion. The condensed polycyclic aromatic group is a residue formed by removing a hydrogen atom bonded to a condensed aromatic ring in formula (1) below from a condensed polycyclic aromatic compound represented by the following formula (1). Also disclosed is a luminescent body including the rare earth compound.Type: ApplicationFiled: December 13, 2019Publication date: March 24, 2022Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yuichi KITAGAWA, Fumiya SUZUE, Yasuchika HASEGAWA, Koji FUSHIMI
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Publication number: 20210269460Abstract: Disclosed is a rare-earth complex including a rare-earth ion, and a ligand coordinate-bonded to the rare-earth ion and having a condensed polycyclic aromatic group. The condensed polycyclic aromatic group is a residue formed by removing a hydrogen atom bonded to a condensed aromatic ring from a condensed polycyclic aromatic compound represented by the following Formula (I). In Formula (I), R1 and R2 represent hydrogen atoms or groups which are bonded to each other to form one aromatic ring or a condensed aromatic ring including two or more aromatic rings.Type: ApplicationFiled: July 4, 2019Publication date: September 2, 2021Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yuichi KITAGAWA, Marina KUMAGAI, Yasuchika HASEGAWA, Takayuki NAKANISHI, Koji FUSHIMI
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Publication number: 20210130378Abstract: A phosphine oxide compound represented by the following formula (I) and a rare earth complex containing the same are disclosed: wherein n represents an integer of 3 or more, Ar1 represents an n-valent aromatic group, L represents a divalent linker group, and Ar2 and Ar3 each independently represent a monovalent aromatic groups.Type: ApplicationFiled: February 21, 2018Publication date: May 6, 2021Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yasuchika HASEGAWA, Pedro paulo FERREIRA DA ROSA, Takayuki NAKANISHI, Yuichi KITAGAWA, Koji FUSHIMI
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Publication number: 20200377748Abstract: An ink composition comprising one or two or more kinds of rare-earth complexes containing trivalent rare-earth ions and at least one organic ligand selected from a ?-diketone ligand, a carboxylic acid ligand, a phosphine oxide ligand and a nitrogen-containing aromatic heterocyclic ligand, wherein at least one selected from the following group A and at least one selected from the following group B are contained as the trivalent rare-earth ions contained in the one or two or more kinds of rare-earth complexes: Group A: Eu3+, Sm3+, Pr3+ and Ho3+; and Group B: Tb3+, Er3+, Tm3+, Dy3+, Yb3+, Nd3+, Ce3+ and Gd3+.Type: ApplicationFiled: June 1, 2018Publication date: December 3, 2020Inventors: Yuko Aoyama, Jun Sato, Fumiyasu Murakami, Masato Okada, Toshio Yoshihara, Yasuchika Hasegawa, Takayuki Nakanishi
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Patent number: 10745614Abstract: Disclosed is a rare-earth complex polymer including trivalent rare-earth ions and a phosphine oxide bidentate ligand represented by the formula (1). One phosphine oxide bidentate ligand is coordinated to the two rare-earth ions, and crosslinks the same.Type: GrantFiled: April 26, 2017Date of Patent: August 18, 2020Assignee: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Takayuki Nakanishi, Yuichi Hirai, Yasuchika Hasegawa, Yuichi Kitagawa, Koji Fushimi
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Publication number: 20200063030Abstract: A rare earth complex including a rare earth ion and a ligand coordinated with the rare earth ion and having a condensed polycyclic aromatic group.Type: ApplicationFiled: February 22, 2018Publication date: February 27, 2020Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yuichi KITAGAWA, Fumiya SUZUE, Takayuki NAKANISHI, Koji FUSHIMI, Yasuchika HASEGAWA
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Patent number: 10399999Abstract: Provided is an organic ligand capable of providing a complex that has a three-dimensional network structure due to rare-earth element ions. Also provided is a coordination polymer which includes this organic ligand, has a new function, and contains rare-earth element ions. Additionally, a process for producing the coordination polymer and a use of the coordination polymer are provided. In particular, provided is a coordination polymer having repeating units of formula (10): wherein each of the variable groups is as defined in the specification.Type: GrantFiled: February 26, 2016Date of Patent: September 3, 2019Assignee: National University Corporation Hokkaido UniversityInventors: Yasuchika Hasegawa, Ayako Nakajima, Takayuki Nakanishi, Yuichi Kitagawa, Koji Fushimi
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Patent number: 10329480Abstract: Provided are: a rare earth complex which has a novel structure, which exhibits compatibility with organic solvents and resins, and which exhibits excellent luminescent properties as a luminescent element; and a use thereof. This rare earth complex includes: a phosphine oxide compound represented by general formula (1); at least one rare earth ion selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and a ligand compound. In the rare earth complex, the coordination numbers of the ligand compound and the phosphine oxide compound represented by general formula (1) to the rare earth ion are 8-10, and a plurality of the phosphine oxide compounds represented by general formula (1) and a plurality of the rare earth ions are provided with a crosslinked structure.Type: GrantFiled: July 4, 2014Date of Patent: June 25, 2019Assignee: National University Corporation Hokkaido UniversityInventors: Yasuchika Hasegawa, Shiori Tateno, Takayuki Nakanishi, Koji Fushimi
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Publication number: 20190119567Abstract: Disclosed is a rare-earth complex polymer including trivalent rare-earth ions and a phosphine oxide bidentate ligand represented by the formula (1). One phosphine oxide bidentate ligand is coordinated to the two rare-earth ions, and crosslinks the same.Type: ApplicationFiled: April 26, 2017Publication date: April 25, 2019Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Tokyo University of Science FoundationInventors: Takayuki NAKANISHI, Yuichi HIRAI, Yasuchika HASEGAWA, Yuichi KITAGAWA, Koji FUSHIMI
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Publication number: 20180334472Abstract: Provided is an organic ligand capable of providing a complex that has a three-dimensional network structure due to rare-earth element ions. Also provided is a coordination polymer which includes this organic ligand, has a new function, and contains rare-earth element ions. Additionally, a process for producing the coordination polymer and a use of the coordination polymer are provided. In particular, provided is a coordination polymer having repeating units of formula (10): wherein each of the variable groups is as defined in the specification.Type: ApplicationFiled: February 26, 2016Publication date: November 22, 2018Inventors: Yasuchika HASEGAWA, Ayako NAKAJIMA, Takayuki NAKANISHI, Yuichi KITAGAWA, Koji FUSHIMI
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Publication number: 20160204363Abstract: The present invention relates to a method for manufacturing a thin film of a rare earth complex polymer with low solubility in an organic solvent and to an organic EL device including a thin film of a rare earth complex polymer obtained using this method, the thin film used as a light-emitting layer. A method for manufacturing a rare earth complex polymer thin film includes a step (1) in which a micelle-containing solvent (A) that includes a rare-earth complex and a ferrocenyl surfactant and a micelle-containing solvent (B) that includes a polydentate ligand and a ferrocenyl surfactant are mixed to form a mixed micelle-containing solvent, and a step (2) in which electrolysis is performed using the mixed micelle-containing solvent as an electrolyte, and formed on a positive electrode surface is a thin film of a rare earth complex polymer that includes the rare earth complex and polydentate ligand.Type: ApplicationFiled: September 5, 2014Publication date: July 14, 2016Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, STANLEY ELECTRIC CO., LTD.Inventors: Yasuchika HASEGAWA, Takeshi SUGAWARA, Tsutomu AKAGI, Masanori SATO, Kazuhiko UENO
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Publication number: 20160160121Abstract: Provided are: a rare earth complex which has a novel structure, which exhibits compatibility with organic solvents and resins, and which exhibits excellent luminescent properties as a luminescent element; and a use thereof. This rare earth complex includes: a phosphine oxide compound represented by general formula (1); at least one rare earth ion selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and a ligand compound. In the rare earth complex, the coordination numbers of the ligand compound and the phosphine oxide compound represented by general formula (1) to the rare earth ion are 8-10, and a plurality of the phosphine oxide compounds represented by general formula (1) and a plurality of the rare earth ions are provided with a crosslinked structure.Type: ApplicationFiled: July 4, 2014Publication date: June 9, 2016Inventors: Yasuchika HASEGAWA, Shiori TATENO, Takayuki NAKANISHI, Koji FUSHIMI
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Patent number: 9280002Abstract: The present invention relates to Eu (II) compound nanocrystals doped with transition metal ions. Such a constitution generates quantum size effects of an Eu (II) compound nanoparticle, while the transition metal ions can affect a magnetooptical property of the Eu (II) compound nanoparticle. Thus, the magnetooptical property can be improved.Type: GrantFiled: March 1, 2012Date of Patent: March 8, 2016Assignee: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yasuchika Hasegawa, Masashi Maeda, Mina Kumagai, Koji Fushimi
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Patent number: 9261718Abstract: The present invention is produced by a composite with an Eu (II) compound nanoparticle and a metal nanoparticle. Such production generates quantum size effects of the Eu (II) compound nanoparticle, while the surface plasmon of the metal nanoparticle can be used. Thus, the magnetooptical property can be improved. In addition, a thin film may be produced by a composite with an Eu (II) compound nanoparticle and a metal nanoparticle.Type: GrantFiled: March 1, 2012Date of Patent: February 16, 2016Assignee: National University Corporation Hokkaido UniversityInventors: Yasuchika Hasegawa, Akira Kawashima, Mina Kumagai, Koji Fushimi
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Patent number: 9051427Abstract: The present invention intends to provide a rare-earth complex polymer having a sufficient heat resistance to be blended in a plastic material and fabricated. A preferable embodiment of the rare-earth complex polymer comprises a plurality of both trivalent rare-earth ions and phosphine oxide multidentate ligands and a crosslinked structure formed by the phosphine oxide multidentate ligands being coordinated to a plurality of the rare-earth ions.Type: GrantFiled: May 1, 2012Date of Patent: June 9, 2015Assignee: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yasuchika Hasegawa, Kohei Miyata, Koji Fushimi, Masako Kato, Atsushi Kobayashi
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Patent number: 8975385Abstract: The rare-earth complex of the present invention has high luminous efficiency, since it has a structure represented by the following general formula (I):Type: GrantFiled: July 15, 2010Date of Patent: March 10, 2015Assignee: National University Corporation Nara Institute of Science and TechnologyInventors: Yasuchika Hasegawa, Tsuyoshi Kawai, Takuya Nakashima, Tetsuya Nakagawa, Kohei Miyata
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Publication number: 20140171600Abstract: The present invention intends to provide a rare-earth complex polymer having a sufficient heat resistance to be blended in a plastic material and fabricated. A preferable embodiment of the rare-earth complex polymer comprises a plurality of both trivalent rare-earth ions and phosphine oxide multidentate ligands and a crosslinked structure formed by the phosphine oxide multidentate ligands being coordinated to a plurality of the rare-earth ions.Type: ApplicationFiled: May 1, 2012Publication date: June 19, 2014Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Yasuchika Hasegawa, Kohei Miyata, Koji Fushimi, Masako Kato, Atsushi Kobayashi