Tosoh Corporation

Sagami Chemical Research Institute

Ryo Nakagame

Taishi Furukawa

Kohei Iwanaga

Naoyuki Koiso

Keisuke Araki

Hiroya Honda

Fumiaki Yoshitomi

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}.

Europium complex

Growing community of inventors

Ayase, Japan

Ryo Nakagame