A Rational Approach to Organo-Photocatalysis. Novel Designs and Structure-Property-Relationships.

Organic photocatalysts (PCs) are emerging as viable and more sustainable tools with respect to metal complexes. Recently, the field of organo-photocatalysis has experienced an explosion in terms of applications, redesign of well-established systems and identification of novel scaffolds. A rational approach to the structural modification of the different PCs is key to accessing unprecedented reactivity, while improving their catalytic performances. We herein discuss the concepts underpinning the scaffold modifications of some of the most recently used PCs, analysing how specific structural changes alter their physicochemical and redox properties.