Solar conversion pathways

Fig. 7.4 Four viable single and multistep solar-to-hydrogen conversion pathways...

With rich luminescent properties, long-lived CT excited states and a variety of bimolecular photochemical reaction pathways, the mixed-ligand square-planar diimine dithiolene complexes of d8 metal ions show great promise for solar-energy conversion, as luminescent probes or in photocatalytic applications. Complexes of this type have also received attention for the nonlinear optical properties, such as second harmonic generation, related to the MMLL CT excited state (14, 129). 

The red-ox processes of biomacromolecules play an essential role in living systems a series of electron-transfer reactions between donor and acceptor substances, immobilized in the membrane or dissolved in the aqueous phase, are involved in the conversion of solar energy in photosynthetic systems or in the cell respiration process. The catalytic role of proteins in signal transduction pathways mediating substrate metabolism in living process is well known. 

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