Photophysics and Photochemistry of a Water-Soluble C60 Dendrimer: Fluorescence Quenching by Halides and Photoinduced Oxidation of I-
Using electronic absorption spectroscopy, and steady-state and time-resolved fluorescence, we studied the singlet state properties of dendro[60]fullerene, a C60 methanoderivative whose addend is a water-soluble dendrimer. Fluorescence quenching, especially by halide ions in water, was characterized...
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| Veröffentlicht in: | The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2001-11, Vol.105 (45), p.10278-10285 |
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| container_issue | 45 |
| container_start_page | 10278 |
| container_title | The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory |
| container_volume | 105 |
| creator | Texier, Isabelle Berberan-Santos, Mário N Fedorov, Aleksandre Brettreich, Michael Schönberger, Hubert Hirsch, Andreas Leach, Sydney Bensasson, René V |
| description | Using electronic absorption spectroscopy, and steady-state and time-resolved fluorescence, we studied the singlet state properties of dendro[60]fullerene, a C60 methanoderivative whose addend is a water-soluble dendrimer. Fluorescence quenching, especially by halide ions in water, was characterized at several temperatures. From a new relation for the activation energy of a diffusion-influenced reaction and from a comparison with the quenching in organic solvents, it is concluded that the quenching occurs by the external heavy-atom effect. An efficient photoinduced oxidation of iodide in aerated solutions and in the presence of a fullerene is also reported. The photoinduced oxidation mechanism exclusively involves ground-state oxygen. |
| doi_str_mv | 10.1021/jp010215a |
| format | Article |
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| source | ACS Publications |
| title | Photophysics and Photochemistry of a Water-Soluble C60 Dendrimer: Fluorescence Quenching by Halides and Photoinduced Oxidation of I- |
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