Synthesis of platinum and palladium complexes as narrow-band phosphorescent emitters for full color displays

1. A complex of the formula:

wherein:

M is platinum or palladium,

Ar 1 is a substituted or unsubstituted pyridinyl, isoquinolinyl, quinazolinyl, or imidazolyl ring when M is palladium, and Ar 1 is a substituted or unsubstituted pyridinyl, isoquinolinyl, quinazolinyl, imidazolyl pyrazolyl, quinolinyl, triazolyl, benzimidazolyl, benzoxazolyl, or benzothiazolyl ring when M is platinum,

each of Ar 2 , Ar 3 , and Ar 4 is independently a substituted or unsubstituted phenyl or pyridyl ring;

Ar 5 is a substituted or unsubstituted phenyl ring,

Ar 6 is a substituted or unsubstituted phenyl ring, or is absent,

each of X 1 , X 2 , X 3 , and X 4 is independently a carbon or nitrogen atom,

each of A 1 and A 2 is independently a nitrogen, carbon, boron, phosphorus, or silicon atom, and each of A 1 and A 2 is independently optionally substituted, and

each of b 1 and b 2 is independently present or absent, and if present is an oxygen, sulfur, nitrogen, carbon, boron, phosphorus, or silicon atom.

2. The complex of claim 1 , wherein:

Ar 1 is a substituted or unsubstituted pyridinyl, isoquinolinyl, quinazolinyl, or imidazolyl ring,

Ar 2 is a substituted or unsubstituted phenyl ring, and

Ar 6 is absent.

3. The complex of claim 1 , wherein:

Ar 1 is a substituted or unsubstituted pyridinyl, isoquinolinyl, quinazolinyl, or imidazolyl ring,

Ar 2 is a substituted or unsubstituted phenyl ring, and

Ar 6 is a substituted or unsubstituted phenyl ring.

4. The complex of claim 1 , wherein the complex is selected from the group consisting of:

5. The complex of claim 1 , wherein the complex is selected from the group consisting of:

6. The complex of claim 1 , wherein the complex is selected from the group consisting of:

7. The complex of claim 1 , wherein the complex is selected from the group consisting of:

8. The complex of claim 1 , wherein the complex is selected from the group consisting of: