Why Photoionic Devices

The usefulness of supramolecular systemswhich operate with ionic inputs and luminescence output stems from many features. 

Ions were present at the creation of supramolecular chemistry. It is remarkable that all three inventors of the field commenced their research by designing and constructing receptors for ions of the s-block in the periodic table. Therefore researchers into photoionic devices have the rare benefit of drawing on the entire resources of a research area right from its inception. 

Molecular photoionic devices with switchable response, at the ensemble level, display nonlinear in/out characteristics which can be operated either as analogue or digital devices by proper control of the ion concentration input variable. When 

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