“…Interest in them continues to grow because they combine thermal and photostability, as well as remarkable optical properties, with a high absorption coefficient and fluorescence quantum yield close to unity. They exhibit strong electron-accepting character with their two electron-withdrawing imide moieties on each side of the perylene backbone and, consequently, they are now considered as one of the best n-type semiconductors, making them ideally suited to applications in organic electronics [ 3 , 4 ], in particular for their use in organic field-effect transistors (OFETs) [ 5 ], organic light-emitting diodes (OLEDs) [ 6 ] and organic photovoltaic (OPV) [ 7 , 8 , 9 , 10 ] devices. However, academic interest has increased in recent years toward the development of new PDI derivatives focusing on biological applications [ 11 , 12 , 13 ], and their photochemical properties are now widely exploited for developing novel systems for applications in bioimaging, photodynamic therapy (PDT) and photothermal therapy (PTT) [ 14 , 15 ].…”