abstract |
A metal chelate compound of the formulan L n -M +n nwherein M represents a metal; n is an integer, or number of from 1 to 3; and L is a ligandnofn nwherein Ar is aryl; X is selected from the group consisting of oxygen, sulfur, andnselenium; N is nitrogen; O is oxygen; and Z is a suitable aromatic component. |