Self-assembled tetrapyrrole–fullerene and tetrapyrrole–carbon nanotube donor–acceptor hybrids for light induced electron transfer applications

Recent Advances in Photoinduced Electron Transfer Processes of Fullerene-Based Molecular Assemblies and Nanocomposites

“…As shown in Figure 5d, an IPCE peak is observed at 460 nm, which is in agreement with the absorption peak of the C 60 moiety, supporting the electron transfer starts from the light absorption of the C 60 moiety, but not from SWCNT, although the NIR region data is lacking. Although the IPCE values are not high, a relatively higher value is obtained for C 60 Pyr/SWCNT(7,6) compared to C 60 Pyr/SWCNT(6,5), which can be interpreted with the wider band-gap and higher conductivity of SWCNT (7,6) [46].…”

“…Figure 5a shows the steady-state absorption spectra of C 60 Pyr/SWCNT(n,m) in the wide region from UV-Visible to NIR; the blue spectrum (ii) for C 60 Pyr/SWCNT (6,5) shows the absorption peak at ca. 1,000 nm in addition to the absorption of C 60 Pyr [black spectrum (i)] in the UV and Visible region, whereas the red spectrum (iii) for C 60 Pyr/SWCNT (7,6) shows a peak at 1,200 nm. These longest absorption peaks correspond to the band gaps of the semiconducting SWCNT; the larger diameter one has narrower band gap than that of the smaller one.…”

“…On combination with light-sensitive molecules, SWCNTs can be modified as light-energy harvesting materials over a wide wavelength range [9,21,23]. Accordingly, various light-sensitive devices and photovoltaic applications using chemically modified SWCNTs have been reported [3][4][5][6][7][8][9][10][11][12][13]. When SWCNT samples including both metallic and semiconducting tubes with different chirality indices are employed as "a material", no meaningful structure-reactivity relationship could be derived.…”

“…Nanosecond transient absorption spectra of C 60 Pyr/SWCNT (7,6) are measured by the selective photo-excitation of the C 60 moiety. Figure 6a shows the observed spectra for the C 60 Pyr/SWCNT(7,6) hybrid; similar spectra are obtained for the C 60 Pyr/SWCNT (6,5) + may be related to the higher electron-conductivity of SWCNT (7,6).…”

Fullerene Dimers Connected through C24and C36Bridge Cages

“…[1][2][3][4][5] One of the unique aspects of fullerenes in this field is the formation of interfullerene bondings, which makes a rich variety of nanoscale network structures such as dimers, oligomers, and one-and two-dimensional fullerene polymeric materials.…”