ABSTRACT
Since the discovery of the photophysical properties of [Ru(bpy)3]2+ (bpy = 2,2'- bipyridine, Fig. 1), the light absorbing properties of this and related chromophores have been a research topic of great interest [1,2]. Recent attention has focused on the development of polymetallic supramolecular systems designed to absorb light and carry out a specific task such as the conversion of light energy to electri cal or chemical energy. As this research has progressed, the molecules have be come increasingly complicated. Bridging ligands are used to hold the metal cen ters together, leading to the construction of polymetallic systems. The bridging ligands’ structure and energetics are vitally important to the functioning of these systems. We will examine a class of polyazine tridentate bridging ligands and the resulting supramolecular systems that utilize this class of bridging ligands. These ligands bridge metals in a linear fashion, resulting in the construction of stereochemically defined multimetallic systems.
