Metal compounds and methods and uses thereof

1. A compound having the structure:

wherein M comprises Pt, Pd, Ir, Rh, or Au;

wherein each of R 1 and R 2 independently are hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, nitro hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each Y 1a independently is O, NR 2 , or S, or a combination thereof, wherein each R 2 independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, arylalkene;

wherein each of Y 1b and Y 1c independently is O or S, or a combination thereof;

wherein each of Y 2a , Y 2b , Y 2c , and Y 2d independently is CR 6b , wherein each R 6b independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

each of Y 3a , Y 3c , Y 3d , Y 4a , Y 4c and Y 4d independently is CR 6b , wherein each R 6b independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each of Y 3b and Y 4b are N or NR 6a , wherein each R 6a independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each of m and n independently are 2;

wherein each of

independently is partial or full unsaturation of the ring with which it is associated.

2. The compound of claim 1 ,

wherein m is 2,

wherein n is 2,

wherein Y 2b and Y 2c is CH,

wherein Y 3b and Y 4b is N,

and

wherein M is Pt or Pd.

3. The compound of claim 2 ,

wherein at least of one of Y 2a , Y 2d , Y 3d and Y 4d is C,

and

wherein M is Pt or Pd.

4. A compound having the structure:

wherein M comprises Ir, Rh, Pt, Os, or Ru;

wherein each of R 1 and R 2 independently are hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, nitro hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each Y 1a independently is O, NR 2 , or S, wherein Y 1d , and Y 1e independently is, NR 2 , CR 2 R 3 , S, AsR 2 , BR 2 , PR 2 , P(O)R 2 , or SiR 2 R 3 , or a combination thereof, wherein each of R 2 and R 3 independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, arylalkene, or R 2 and R 3 together form C═O, wherein each of R 2 and R 3 independently is linked to an adjacent ring structure, thereby forming a cyclic structure;

wherein each of Y 1b and Y 1c independently is O or S, or a combination thereof;

wherein each of Y 2a , Y 2b , Y 2c , and Y 2d independently is CR 6b , wherein each R 6b independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each of Y 3a , Y 3c , Y 3d , Y 4a , Y 4c , and Y 4d independently is CR 6b , wherein each R 6b independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each of Y 3b and Y 4b are N or NR 6a , wherein each R 6a independently is hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein in each of each of Y 5a , Y 5b , Y 5c , Y 5d , Y 6a , Y 6b , Y 6c , and Y 6d independently is N, O, S, NR 6a , or CR 6b ; wherein each of R 6a and R 6b independently hydrogen, substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkane, cycloalkane, heterocyclyl, amino, hydroxyl, halogen, thio, alkoxy, haloalkyl, arylalkane, or arylalkene;

wherein each m independently is 2;

wherein each of

independently is partial or full unsaturation of the ring with which it is associated.

5. The compound of claim 4 ,

wherein m is 2,

wherein Y 2b and Y 2c is CH,

wherein Y 3b and Y 4b is N,

and

wherein M is Ir or Rh.

6. The compound of claim 5 ,

wherein at least of one of Y 2a , Y 2d , Y 3d and Y 4d is C, and

wherein M is Ir or Rh.

7. A device comprising the compound of claim 1 .

8. The device of claim 7 , wherein the device is an organic light emitting diode.

9. The device of claim 7 , wherein the device comprises a full color display.

10. The device of claim 7 , wherein the one or more compounds is used as a host material.

11. The device of claim 7 , wherein the device can be a lighting device.

12. A device comprising the compound of claim 1 , wherein the compound is used as a phosphorescent emitter in the device.

13. A device comprising the compound of claim 1 , wherein the compound is used as a delayed fluorescent and phosphorescent emitter in the device.

14. A composition comprising the compound of claim 1 .