Organic electroluminescent materials and devices
US12421262B2 · kind B2 · utility
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31References
20Claims
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Key dates
| Filing date | Mar 1, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Jul 25, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound of Formula I, or Formula II, is provided. In Formulae I and II, M is Pt or Pd; each RA, RA′, RA″, RB, R1, R2, R3, R4, and R5 is hydrogen or one of the General Substituents; R1′ is one of the General Substituents; at least one of RA′, RA″, and RB is not hydrogen; any two of RA, RA′, RA″, RB, R1, R2, R3, R4, and R5 may be joined or fused together to form a ring; and RA′, RA″, and RB together comprise at least one heterocyclic group or at least two carbocyclic groups; with the proviso that at least one of RA′ and RA″ comprises a cyclic group when RB is one of five specific moieties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.