Rare earth complex and light emitting element

Patent metadata

Field	Value
Publication number	US-11499093-B2
Application number	US-201816488784-A
Country	US
Kind code	B2
Filing date	Feb 22, 2018
Priority date	Feb 27, 2017
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

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. The condensed polycyclic aromatic group is a residue formed by removing a hydrogen atom from a condensed polycyclic aromatic compound represented by the following formula (I) or (II):

First claim

The invention claimed is:

1. A rare earth complex comprising:
a rare earth ion; and
a ligand coordinated with the rare earth ion and having a condensed polycyclic aromatic group,
wherein the condensed polycyclic aromatic group is a residue formed by removing a hydrogen atom bonded to a condensed aromatic ring in the following formula (I) or formula (II) from a condensed polycyclic aromatic compound represented by formula (I) or (II), and
the condensed polycyclic aromatic compound optionally has a substituent bonded to the condensed aromatic ring in formula (I) or formula (II),

wherein the ligand having the condensed polycyclic aromatic group is a phosphine oxide ligand having one phosphine oxide group and represented by the following formula (10):

wherein in formula (10), Z represents the condensed polycyclic aromatic group and R 11 and R 12 each independently represent an aryl group different from the condensed polycyclic aromatic group, and
the rare earth complex further comprises a diketone ligand represented by the following formula (21) and coordinated with the rare earth ion:

wherein R 23 , R 24 and R 25 each independently represent a hydrogen atom, an alkyl group, a halogenated alkyl group, an aryl group different from the condensed polycyclic aromatic group, or a heteroaryl group.

2. A light emitting element comprising the rare earth complex according to claim 1 .

3. A rare earth complex comprising:
two rare earth ions; and
a ligand coordinated with each of the rare earth ions and having a condensed polycyclic aromatic group,
wherein the condensed polycyclic aromatic group is a residue formed by removing two hydrogen atoms bonded to the condensed aromatic ring in the following formula (I) or formula (II) from a condensed polycyclic aromatic compound represented by formula (I) or (II), and
the condensed polycyclic aromatic compound optionally has a substituent bonded to the condensed aromatic ring in formula (I) or formula (II),

wherein the ligand having the condensed polycyclic aromatic group is a bidentate phosphine oxide ligand represented by the following formula (30), and the phosphine oxide ligand is coordinated with two of the rare earth ions:

wherein Z represents the condensed polycyclic aromatic group, and R 11 and R 12 each independently represent an aryl group different from the condensed polycyclic aromatic group.

4. The rare earth complex according to claim 3 , further comprising a diketone-ligand represented by the following formula (21) and coordinated with one of the two rare earth ions:

wherein R 23 , R 24 and R 25 each independently represent a hydrogen atom, an alkyl group, a halogenated alkyl group, an aryl group different from the condensed polycyclic aromatic group, or a heteroaryl group.

5. A light emitting element comprising the rare earth complex according to claim 3 .

Assignees

• Univ Hokkaido Nat Univ Corp

Inventors

• Kitagawa Yuichi
• SUZUE Fumiya
• Nakanishi Takayuki
• Fushimi Koji
• Hasegawa Yasuchika

Classifications

• C07F5/00 Primary

  Compounds containing elements of Groups 3 or 13 of the Periodic Table · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C07C49/167

  containing only fluorine as halogen · CPC title

• C07F9/53

  Organo-phosphine oxides; Organo-phosphine thioxides · CPC title

• C09K2211/1011

  Condensed systems · CPC title