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US 8,012,604 B2Granted
Electroluminescent materials and devices
AssigneeMerck Patent GmbH
InventorsPoopathy Kathirgamanathan, Subramaniam Ganeshamurugan, Gnanamoly Paramaswara, Muthulingham Kumaraverl, Arumugam Partheepan, Selvadurai Selvaranjan, Juan Antipan-Lara, Richard Price, Sivagnanasundram Surendrakumar
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Abstract
The present invention relates to heteroleptic electroluminescent metal complexes and to their preparation and use in electroluminescent devices, particularly to electroluminescent compounds having the general chemical formula:
Claims20
An electroluminescent compound having the following general chemical formula:
- wherein R1, R2, R3 and R4 can be the same or different and are independently selected from the group consisting of hydrogen;
- substituted and unsubstituted hydrocarbyl groups;
- substituted and unsubstituted aliphatic groups;
- substituted and unsubstituted aromatic, heterocyclic and polycyclic ring structures;
- aryloxy groups;
- fluorocarbon groups;
- halogens;
- and thiophenyl groups;
- further wherein R1, R2 and R3 can also form substituted and unsubstituted fused aromatic, heterocyclic and polycyclic ring structures and can be copolymerisable with a monomer;
- M is selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum;
- and the sum (n+1) is equal to the valency of M.
8 more elements
A method of preparing an electroluminescent compound having the general chemical formula
- wherein R1, R2, R3 and R4 can be the same or different and are independently selected from the group consisting of hydrogen;
- substituted and unsubstituted hydrocarbyl groups;
- substituted and unsubstituted aliphatic groups;
- substituted and unsubstituted aromatic, heterocyclic and polycyclic ring structures;
- aryloxy groups;
- fluorocarbon groups;
- halogens;
- and thiophenyl groups;
- further wherein R1, R2 and R3 can also form substituted and unsubstituted fused aromatic, heterocyclic and polycyclic ring structures and can be copolymerisable with a monomer, said method comprising the step of reacting a compound having the general chemical formula
- with a compound having the general chemical formula
- where R1, R2, R3 and R4 are defined as above;
- X is an anion;
- M is selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum;
- and the sum (n+1) is equal to the valency of M.
11 more elements
Dependencies are inferred from the claim text.