Metal complexes, methods, and uses thereof

Patent metadata

Field	Value
Publication number	US-12043633-B2
Application number	US-202117212209-A
Country	US
Kind code	B2
Filing date	Mar 25, 2021
Priority date	Oct 26, 2012
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

Disclosed herein are metal complexes that exhibit multiple radiative decay mechanisms, together with methods for the preparation and use thereof.

First claim

What is claimed is:

1. A metal complex comprising:
a transition metal selected from the group consisting of palladium (II), gold (III), iridium (I), and rhodium (I); and
a tetradentate ligand bonded to the transition metal,
wherein:
the metal complex has a lowest triplet excited state and a lowest singlet excited state,
the lowest triplet excited state has a lower energy level than the lowest singlet excited state,
the lowest triplet excited state is associated with phosphorescence, and
a transition from the lowest triplet excited state to the lowest singlet excited state yields delayed fluorescence from the lowest singlet excited state;
wherein the metal complex is represented by formula (a):

wherein M is palladium (II), gold (III), iridium (I), or rhodium (I),
wherein A is an accepting group represented by comprising the following structure, which can optionally be substituted,

wherein D is a donor group represented by the structure,

 which can optionally be substituted,
wherein C represents the structure,

 which can optionally be substituted,
wherein N represents one or more of the following structures, which can optionally be substituted:

wherein a 2 is absent,
wherein b 1 is present or absent, and if present, represents a linking group of one or more of the following:

wherein b 2 is absent,
wherein X is N, and
wherein each of R is hydrogen, aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, alkenyl, alkynyl, deuterium, halogen, hydroxyl, thiol, nitro, cyano, amino, a mono- or di-alkylamino, a mono- or diaryl amino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, nitrile, isonitrile, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, sulfinyl, ureido, phosphoramide, amercapto, sulfo, carboxyl, hydrazino, substituted silyl, or polymerizable, or any conjugate or combination thereof.

2. The metal complex of claim 1 , wherein the tetradentate ligand comprises at least four or six-membered aryl or heteroaryl groups.

3. The metal complex of claim 1 , wherein N is

or R substituted

4. The metal complex of claim 1 , represented by the following structure:

5. A device comprising the metal complex of claim 1 .

6. The device of claim 5 , wherein the device is an organic light emitting diode or a full color display.

Assignees

• Univ Arizona State

Inventors

• Li Jian
• Turner Eric

Classifications

• C09K2211/187

  of the iron group metals, i.e. Fe, Co or Ni · CPC title

• C07F15/06

  Cobalt compounds · CPC title

• C07F15/04

  Nickel compounds · CPC title

• C07F15/0086

  Platinum compounds · CPC title

• C07F15/0073

  Rhodium compounds · CPC title