申请人:TOSOH CORPORATION
公开号:US10988494B2
公开(公告)日:2021-04-27
To provide europium complexes having high photostability.
A europium complex expressed with the following formula (A):
wherein, RA and RB are independently a cyclic alkyl group with 3 to 10 carbons, respectively, and RC is a cyclic alkyl group with 3 to 10 carbons or a phenyl group expressed with the following formula (B):
(wherein, XA, XB, AC, XD and XE independently 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);
RA is a cyclic alkyl group with 3 to 10 carbons;
RB and RC are a phenyl group expressed with the formula (B), provided, however, that a case where RA a cyclohexyl group, and, RB and RC are a phenyl group is excluded; or
RA, RB and RC independently represent an ortho-substituted phenyl group expressed with the following formula (Ba):
(wherein, XE represents 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, ZA, ZC and ZE independently 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; ZB and ZD independently represent a hydrogen atom or a fluorine atom, respectively], provided, however, that a case where RA, RB and RC are all a phenyl group is excluded), respectively; RD represents a hydrogen atom, a deuterium atom or a fluorine atom; WA and WB independently 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}.
提供具有高光稳定性的铕络合物。
用下式(A)表示的铕络合物:
其中,RA 和 RB 分别独立地为含 3 至 10 个碳原子的环状烷基,RC 为含 3 至 10 个碳原子的环状烷基或苯基,如下式(B)所示:
(其中,XA、XB、AC、XD 和 XE 分别代表氢原子;氟原子;含 1 至 3 个碳原子的烷基;含 1 至 3 个碳原子的烷氧基;含 6 至 10 个碳原子的芳氧基;含 1 至 3 个碳原子的氟烷基;含 1 至 3 个碳原子的氟烷氧基;或可分别被氟原子、1 至 3 个碳原子的烷基、1 至 3 个碳原子的烷氧基、1 至 3 个碳原子的氟烷基、1 至 3 个碳原子的氟烷氧基、氟苯基、羟基或氰基取代的苯基);
RA 是含 3 至 10 个碳原子的环状烷基;
RB 和 RC 是用式(B)表示的苯基,但不包括 RA 是环己基,RB 和 RC 是苯基的情况;或
RA、RB 和 RC 分别代表用下式(Ba)表示的正代苯基:
(其中,XE 代表氢原子、含 1 至 3 个碳原子的烷基、含 1 至 3 个碳原子的烷氧基、含 1 至 3 个碳原子的氟烷基、含 1 至 3 个碳原子的氟烷氧基、可被氟原子取代的萘基、可被氟原子取代的吡啶基或以式 (C) 表示的苯基:
[其中,ZA、ZC 和 ZE 分别独立地代表氢原子、氟原子、含 1 至 3 个碳原子的烷基、含 1 至 3 个碳原子的烷氧基、含 1 至 3 个碳原子的氟烷基、含 1 至 3 个碳原子的氟烷氧基、可被氟原子、羟基或氰基取代的苯基;ZB和ZD分别独立地代表氢原子或氟原子],但不包括RA、RB和RC均为苯基的情况;RD分别代表氢原子、氘原子或氟原子;WA和WB分别独立地代表1至6个碳的烷基、1至6个碳的氟烷基、苯基、2-噻吩基或3-噻吩基;以及'n'代表1至3的整数}。