Metal complexes

Patent metadata

Field	Value
Publication number	US-2026070936-A1
Application number	US-202519040947-A
Country	US
Kind code	A1
Filing date	Jan 30, 2025
Priority date	Apr 15, 2019
Publication date	Mar 12, 2026
Grant date	—

Abstract

The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, containing these metal complexes.

First claim

1 . A compound of formula (1)

containing a substructure M (L), of the formula (2):

where the symbols and indices used are as follows:
M is iridium;
D is Cor N, where one D is C and the other D is N;
X is the same or different at each instance and is CR or N;
R is the same or different at each instance and is H, D, F, Cl, Br, I, N(R 1 ) 2 , CN, NO 2 , OR′, SR 1 , COOR 1 , C(═O)N(R 1 ) 2 , Si(R 1 ) 3 , B(OR 1 ) 2 , C(═O) R′, P(═O)(R 1 ) 2 , S(═O) R′, S(═O) 2R′, OSO 2 R 1 , a straight-chain alkyl group having 1 to 20 carbon atoms or an alkenyl or alkynyl group having 2 to 20 carbon atoms or a branched or cyclic alkyl group having 3 to 20 carbon atoms, where the alkyl, alkenyl or alkynyl group may in each case be substituted by one or more R 1 radicals, where one or more nonadjacent CH 2 groups may be replaced by Si(R 1 ) 2 , C═O, NR′, O, S or CONR 1 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms, preferably 5 to 40 aromatic ring atoms, and may be substituted in each case by one or more R 1 radicals; optionally, two R radicals together may also form an aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system;
R 1 is the same or different at each instance and is H, D, F, Cl, Br, I, N(R 2 ) 2 , CN, NO 2 , OR 2 , SR 2 , Si(R 2 ) 3 , B(OR 2 ) 2 , C(═O)R 2 , P(═O) (R 2 ) 2 , S(═O) R 2 , S(═O) 2 R 2 , OSO 2 R 2 , a straight-chain alkyl group having 1 to 20 carbon atoms or an alkenyl or alkynyl group having 2 to 20 carbon atoms or a branched or cyclic alkyl group having 3 to 20 carbon atoms, where the alkyl, alkenyl or alkynyl group may each be substituted by one or more R 2 radicals, where one or more nonadjacent CH 2 groups may be replaced by Si(R 2 ) 2 , C—O, NR 2 , O, S or CONR 2 and where one or more hydrogen atoms in the alkyl, alkenyl or alkynyl group may be replaced by D, F, Cl, Br, I or CN, or an aromatic or heteroaromatic ring system which has 5 to 40 aromatic ring atoms and may be substituted in each case by one or more R 2 radicals; optionally, two or more R 1 radicals together may form an aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system;
R 2 is the same or different at each instance and is H, D, F, CN or an aliphatic, aromatic or heteroaromatic organic radical, having 1 to 20 carbon atoms, in which one or more hydrogen atoms may also be replaced by F;
L′ is the same or different at each instance and is a ligand;
n is 1, 2 or 3;
m is 0, 1, 2, 3 or 4;
optionally, two or more ligands L may be joined together, or L may be joined to L′, by a single bond or a bivalent or trivalent bridge, thus forming a tridentate, tetradentate, pentadentate or hexadentate ligand system.

2 . The compound as claimed in claim 1 , wherein the unit of the formula (2) is selected from the structures of the formula (3)

3 . The compound as claimed in claim 1 , wherein the unit of the formula (2) is selected from the structures of the formulae (3a) to (3f) and (4a) to (4f),

4 . The compound as claimed in claim 1 , wherein the unit of the formula (2) is selected from the structures of the formulae (3a-1) to (4f-1):

where
R′ has the same definitions as R, where at least one substituent R′ is not H or D.

5 . The compound as claimed in claim 1 wherein the unit of the formula (2) is selected from the structures of the formulae (3a-2) to (4a-6):

6 . The compound as claimed in claim 1 , wherein R is the same or different at each instance and is selected from the group consisting of H, D, F, Br, I, N(R 1 ) 2 , CN, Si(R 1 ) 3 , B(OR 1 ) 2 , a straight-chain alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms or a branched or cyclic alkyl group having 3 to 10 carbon atoms, each of which may be substituted by one or more R 1 radicals, where one or more hydrogen atoms may be replaced by D or F, or an aromatic or heteroaromatic ring system which has 5 to 24 aromatic ring atoms and may be substituted in each case by one or more R 1 radicals; optionally, two adjacent R radicals together may also form an aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system.

7 . The compound as claimed in claim 1 , wherein the compound is selected from the structures of the formulae (12) to (15):

8 . The compound as claimed in claim 7 , wherein V in the compounds of the formulae (12) and (13) is a group of the formula (26), where the dotted bonds represent the position of the linkage of the sub-ligands L and L′:

where:
X 1 is the same or different at each instance and is CR or N;
X 2 is the same or different at each instance and is CR or N;
A is the same or different at each instance and is CR 2 —CR 2 , CR 2 —O, CR 2 —NR, C(═O)—O, C(═O)—NR or a group of the following formula (27):

where the dotted bond in each case represents the position of the bond of the bidentate sub-ligands L or L′ to this structure, * represents the position of the linkage of the unit of the formula (27) to the central trivalent aryl or heteroaryl group.

9 . The compound as claimed in claim 7 , wherein V in the compounds of the formulae (12) and (13) represents a structure of one of the formulae (36) to (39):

10 . The compound as claimed in claim 1 , wherein L′ is the same or different at each instance and is a bidentate monoanionic ligand.

11 . A process for preparing the compound as claimed in claim 1 , which comprises reacting the ligands L and optionally L′ with metal alkoxides of the formula (79), with metal ketoketonates of the formula (80), with metal halides of the formula (81), with dimeric metal complexes of the formula (82) or with metal complexes of the formula (83):

where Hal=F, Cl, Br or I, L″ is an alcohol or a nitrile and (Anion) is a non-coordinating anion.

12 . A formulation comprising at least one compound as claimed in claim 1 and at least one further compound and/or at least one solvent.

Assignees

• Udc Ireland Ltd

Inventors

• Stoessel Philipp
• May Falk
• Auch Armin
• WALTER Charlotte

Classifications

• H10K85/00

  Organic materials used in the body or electrodes of devices covered by this subclass · CPC title

• H10K2101/10

  Triplet emission · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K85/346

  comprising platinum · CPC title

• H10K85/342

  comprising iridium · CPC title