PHOSPHORESCENT EMITTERS AND HOST MATERIALS WITH IMPROVED STABILITY
申请人:Xia Chuanjun
公开号:US20110057559A1
公开(公告)日:2011-03-10
Devices containing a particular combination of organic compounds are provided. In particular, the devices contain twisted aryl compounds having extended conjugation (i.e., the twisted aryl is substituted with an additional aryl group) in combination with dibenzothiophene or dibenzofuran containing host materials. The organic light emitting devices may provide improved stability color, lifetime and manufacturing. Compounds containing a twisted aryl having extended conjugation are also provided.
TRANSITION METAL COMPLEXES COMPRISING ASYMMETRIC TETRADENTATE LIGANDS
申请人:SOLVAY SA
公开号:US20150243910A1
公开(公告)日:2015-08-27
Light emitting transition metal complexes comprising sub-units based on asymmetric tetradentate ligands comprising two different bidentate ligand units.
A process for the manufacture of heteroleptic complexes of a transition metal M having the general formula [M(L)
n
L′] wherein M is Ir, Rh, Pt or Pd and n is 2 for M=Ir or Rh and n is 1 for M=Pt or Pd and L is a bidentate cyclometallated ligand coordinated to the metal M through covalent metal-C and dative donor-atom-metal bonds, by reacting a halo-bridged dimer of general formula [L
n
M(μ-X)
2
)ML
n
] with a bidentate ligand compound of formula L′-H or a halo-bridged dimer of general formula [L′
n
M(μ-X)
2
) -ML′
n
] with a ligand compound of formula L-H where (μ-X) represents a bridging halide in a solvent mixture of an organic solvent and water comprising more than 25 vol % of water at a temperature of from 50 to 260° C. in the presence of from 0 to 5 molar equivalents relative to the number of moles of halide X-ion introduced into the reaction mixture through the halo-bridged dimer of a scavenger for halide X-ion and in the presence of from 0 to 0.8 moles, based on the molar amount of transition metal in the halo-bridged dimer of an added salt and of from 0 to 10 vol %, based on the total volume of the solvent mixture, of a solubilisation agent increasing the solubility of the halo-bridged dimer in the reaction mixture.