Photophysical properties of fullerene-dendron-pyropheophorbide supramolecules
Ermilov, EA; Al-Omari, S; Helmreich, M; Jux, N; Hirsch, A; Roder, B
| HERO ID | 4935999 |
|---|---|
| In Press | No |
| Year | 2004 |
| Title | Photophysical properties of fullerene-dendron-pyropheophorbide supramolecules |
| Authors | Ermilov, EA; Al-Omari, S; Helmreich, M; Jux, N; Hirsch, A; Roder, B |
| Journal | Chemical Physics |
| Volume | 301 |
| Issue | 1 |
| Page Numbers | 27-31 |
| Abstract | Two novel monofullerene-bis(pyropheophorbide a) complexes were synthesized and their photophysical properties were studied by using both steady-state and time-resolved techniques. It was revealed that in the pyropheophorbide a (pyroPheo)-C-60 molecular system (FP1) strong quenching of the first excited singlet state of the pyroPheo and, as result, dramatically decreasing of photosensitized singlet oxygen generation occurs by efficient photoinduced electron transfer to the fullerene molecule with a rate constant of 2.5 x 10(9) s(-1). In contrast, the fullerene hexaadduct-bis(pyroPheo) system (FHP1), which possesses five diethyl malonate addends in the remaining octahedral positions, shows a high singlet oxygen quantum yield which is due to the reduced fullerene chromophore which is not a good electron acceptor anymore. (C) 2004 Elsevier B.V. All rights reserved. |
| Doi | 10.1016/j.chemphys.2004.02.015 |
| Wosid | WOS:000221417800004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | photosensitizer; pyropheophorbide alpha; fullerene; photoinduced electron transfer; singlet molecular oxygen |