Phosphorescent iridium complexes
View Patent ↗Metal complexes of formula I and IA and polymers derived from the complexes are useful in optoelectronic devices wherein M is Ir, Co or Rh; is a cyclometallated ligand; R 1 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl; R 2 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl; and at least one of R 1 and R 2 is other than hydrogen; R 1a is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl; R 2a is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl; and at least one of R 1a and R 2a is substituted alkyl, substituted aryl, substituted arylalkyl, and at least one substitutent of the substituted alkyl, substituted aryl, or substituted arylalkyl is a polymerizable group.
1. An optoelectronic device having at least one layer comprising a polymer having pendant groups or end groups derived from at least one metal complex of formula IA
wherein
M is Ir, Co, or Rh;
is a cyclometallated ligand;
R 1a is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl,
R 2a is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl; and
at least one of R 1a and R 2a is substituted alkyl, substituted aryl, substituted arylalkyl, and at least one substitutent of the substituted alkyl, substituted aryl, or substituted arylalkyl is a polymerizable group.
2. An optoelectronic device according to claim 1 , wherein at least one substitutent of the substituted alkyl, substituted aryl, or substituted arylalkyl is halo, hydroxy, alkoxysilyl, vinyl, or (meth)acrylate.
3. An optoelectronic device according to claim 1 , wherein the polymer additionally comprises structural units derived from fluorene or substituted fluorene.
4. A polymer having structural or end units derived from a metal complex of formula IA
wherein
M is Ir, Co, or Rh;
is a cyclometallated ligand;
R 1a is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl,
R 2a is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl; and
at least one of R 1a and R 2a is substituted alkyl, substituted aryl, substituted arylalkyl, and at least one substitutent of the substituted alkyl, substituted aryl, or substituted arylalkyl is a polymerizable group.
5. A polymer according to claim 4 , additionally comprising structural units derived from fluorene or substituted fluorene.
6. A polymer according to claim 4 , wherein at least one substitutent of the substituted alkyl, substituted aryl, or substituted arylalkyl is halo, hydroxy, alkoxysilyl, vinyl, or (meth)acrylate.
7. A metal complex selected from
8. An optoelectronic device comprising a metal complex according to claim 7 .