Spectroscopic characterization of photolytically generated radical ion pairs in single-wall carbon nanotubes bearing surface-immobilized tetrathiafulvalenes.
We succeeded in establishing for the first time a conclusive spectroscopic signature for reduced single-wall carbon nanotubes (SWNT), which evolves from electron donor-acceptor interactions between SWNT and electron-donating pi-extended tetrathiafulvalene (exTTF). In particular, pi-pi interactions were employed to anchor the electron donor to the surface of SWNT. New conduction band electrons, injected from photoexcited exTTF, shift the transitions that are associated with the van Hove singularities to lower energies.
Herranz
M Angeles
MA
Departamento de Química Orgánica I, Facultad de Química, Universidad Complutense de Madrid, E-28040 Madrid, Spain.
Ehli
Christian
C
Campidelli
Stéphane
S
Gutiérrez
Miriam
M
Hug
Gordon L
GL
Ohkubo
Kei
K
Fukuzumi
Shunichi
S
Prato
Maurizio
M
Martín
Nazario
N
Guldi
Dirk M
DM
D004553:Electric Conductivity; D004583:Electrons; D005609:Free Radicals / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D007477:Ions; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010782:Photolysis; D013057:Spectrum Analysis; D013499:Surface Properties
D005609:Free Radicals; D006571:Heterocyclic Compounds; D007477:Ions; D037742:Nanotubes, Carbon; C063887:tetrathiafulvalene