Photoinduced Energy and Electron Transfer in Supramolecular Systems

2 Photoinduced Energy and Electron Transfer in Supramolecular Systems 

For simplicity, we consider the case of an A-L-B supramolecular system, where A is the light-absorbing molecular unit (2.12), B is the other molecular unit involved with A in the light induced processes, and L is a connecting unit (often called bridge). In such a system, electron and energy transfer processes can be described as follows  

In the absence of chemical complications (e.g. fast decomposition of the oxidized and/or reduced species), photoinduced electron transfer processes are followed by spontaneous back-electron transfer reactions that regenerate the 

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A peculiar aspect of photoinduced energy and electron transfer in supramolecular systems is that the relative positions and distances between the excited state A and the quencher B can be preorganized so as to control the rate of the process... 

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