Redox-active dendrimers transition metal complexes

Our aim has been the construction of dendrimers that incorporate in their building blocks specific pieces of information such as the capability to absorb and emit visible light and to reversibly exchange electrons.To pursue this aim, we have designed a synthetic strategy to build up dendrimers based on luminescent and redox-active transition metal complexes. Species containing 4, 6, iP 10,2W7 28 gjjj 222930 metal-based units have already been obtained. We will see... 

In order to build up dendrimers crqrable of exhibiting redox activity and light-induced functions, appropriate building blocks have to be used. In the last 20 years, extensive investigations carried out on the photochemical and electrochemical properties of transition metal compounds have shown that Ru(II) and Os(ll) complexes of aromatic M-heterocycles (Figure 1), e.g., Ru(bpy)j and Os(bpy)j (bpy = 2,2 -bipyridine), exhibit a unique combination of chemical stability, redox properties, excited state reactivity, luminescence, and excited state lifetime. Furthermore all these properties can be tuned within rather broad ranges by... 

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