Electronic communication in tetrathiafulvalene (TTF)/C60 systems: toward molecular solar energy conversion materials?
The covalent connection of the electron acceptor C 60 to p-quinonoid pi-extended tetrathiafulvalenes (exTTFs) has allowed for the preparation of new photo- and electroactive conjugates able to act as artificial photosynthetic systems and active molecular materials in organic photovoltaics. The gain of aromaticity undergone by the pi-extended TTF unit in the oxidation process results in highly stabilized radical ion pairs, namely, C 60 (*-)/exTTF (*+). Lifetimes for such charge-separated states, ranging from a few nanoseconds to hundreds of microseconds, have been achieved by rationally modifying the nature of the chemical spacers. These long-lived radical pairs are called to play an important role for the conversion of sunlight into chemical or electrical power.
Martín
Nazario
N
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense, E-28040 Madrid, Spain. nazmar@quim.ucm.es
Sánchez
Luis
L
Herranz
María Angeles
MA
Illescas
Beatriz
B
Guldi
Dirk M
DM
D037741:Fullerenes / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D037742:Nanotubes, Carbon; D012993:Solar Energy
D037741:Fullerenes; D006571:Heterocyclic Compounds; D037742:Nanotubes, Carbon; C063887:tetrathiafulvalene; C069837:fullerene C60