ABSTRACT
Metallo-1,2-enedithiolates are a new important class of emissive molecules. These complexes have also been used as Q-switching laser dyes [ 1 ,2 ], as compo nents in conducting [3-6] and magnetic [7,8] materials, and as models for the molybdenum and tungsten cofactors [9-15]. The emissive properties of metallo1 ,2 -enedithiolates were initially discovered in the late 1970s as square planar group VIII and IIB thiolate complexes became the subject of intensive study. Among these thiolates, the 1,2-enedithiolates emerged with the most interesting, diverse, and potentially useful photophysical properties [16-36]. The photophysi cal properties of these complexes can be associated with several different lowest lying transitions and, by inference, several excited states. These include metalto-ligand charge transfer (MLCT), ligand-to-ligand charge transfer (LLCT), and intraligand charge transfer (ILCT) transitions.
