Artificial photosynthetic systems using zeolite assemblies for solar energy conversion

摘要

In the past several decades there has been considerable interest in efficiently harnessing solar energy to generate chemical energy.1,2 However, significant progress is still needed to reach this goal. Natural photosynthesis represents the conversion of solar energy to chemicals via a complex array of light-harvesting pigments and redox species arranged spatially across membranes.3 It is necessary to create long-lived accessible photogenerated charge-separated species for building up an efficient energy conversion system. The thermal back-electron-transfer reaction makes this difficu e.g., with the photosensitizer tris(bipyridine)ruthenium-(II) (Ru(bpy)_3~(2+) ) and the electron acceptor methyl viologen (MV ~(2+)), the forward- and back-electron-transfer rate constants are reported to be 5.6 x 10 ~9 and 2.4 x 10 ~9 M~(-1) s~(-1), respectively.