The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2021
Filed:
Nov. 27, 2018
Tosoh Corporation, Shunan, JP;
Sagami Chemical Research Institute, Ayase, JP;
Keisuke Araki, Ayase, JP;
Hiroya Honda, Ayase, JP;
Naoyuki Koiso, Ayase, JP;
Ryo Nakagame, Ayase, JP;
Fumiaki Yoshitomi, Ayase, JP;
Kohei Iwanaga, Ayase, JP;
Taishi Furukawa, Ayase, JP;
TOSOH CORPORATION, Shunan, JP;
SAGAMI CHEMICAL RESEARCH INSTITUTE, Ayase, JP;
Abstract
To provide europium complexes having high photostability. A europium complex expressed with the following formula (A): {wherein, Rand Rare independently a cyclic alkyl group with 3 to 10 carbons, respectively, and Ris a cyclic alkyl group with 3 to 10 carbons or a phenyl group expressed with the following formula (B): (wherein, X, X, A, Xand Xindependently represent a hydrogen atom; a fluorine atom; an alkyl group with 1 to 3 carbon(s); an alkyloxy group with 1 to 3 carbon(s); an aryloxy group with 6 to 10 carbons; a fluoroalkyl group with 1 to 3 carbon(s); a fluoroalkyloxy group with 1 to 3 carbon(s); or a phenyl group that may be substituted with a fluorine atom, an alkyl group with 1 to 3 carbon(s), an alkyloxy group with 1 to 3 carbon(s), a fluoroalkyl group with 1 to 3 carbon(s), a fluoroalkyloxy group with 1 to 3 carbon(s), a fluorophenyl group, a hydroxyl group or a cyano group, respectively); (wherein, Xrepresents a hydrogen atom, an alkyl group with 1 to 3 carbon(s), an alkyloxy group with 1 to 3 carbon(s), a fluoroalkyl group with 1 to 3 carbon(s), a fluoroalkyloxy group with 1 to 3 carbon(s), a naphthyl group that may be substituted with a fluorine atom, a pyridyl group that may be substituted with a fluorine atom, or a phenyl group that is expressed with a formula (C): [wherein, Z, Zand Zindependently represent a hydrogen atom, a fluorine atom, an alkyl group with 1 to 3 carbon(s), an alkyloxy group with 1 to 3 carbon(s), a fluoroalkyl group with 1 to 3 carbon(s), a fluoroalkyloxy group with 1 to 3 carbon(s), a phenyl group that may be substituted with a fluorine atom, a hydroxyl group or a cyano group; Zand Zindependently represent a hydrogen atom or a fluorine atom, respectively], provided, however, that a case where R, Rand Rare all a phenyl group is excluded), respectively; Rrepresents a hydrogen atom, a deuterium atom or a fluorine atom; Wand Windependently represent an alkyl group with 1 to 6 carbon(s), a fluoroalkyl group with 1 to 6 carbon(s), a phenyl group, a 2-thienyl group or a 3-thienyl group; and 'n' represents an integer of 1 to 3}.