Picosecond relaxation of charge transfer states in an asymmetric cerium double-decker sandwich compound
✍ Scribed by Thu-Hoa Tran-Thi; Thierry Fournier; André De Cian; Driss Chabach; Raymond Weiss; Daniel Houde; Claude Pépin; Lê Dao
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 527 KB
- Volume
- 213
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Subpicosecond time-resolved absorption stumes have been carried out on a cerium porphyrin-phthalocyanine sandwich mixed dimer in the liquid and solid states. Following excitation, two relaxation processes having time constants of z 1 and e40 ps are observed irrespective to the nature of the environment. The first process is attributed to the relaxation of the excited state of the dimer to a low-lying charge transfer state. The second one, much slower, accounts for the relaxation of the charge transfer state back to the ground state. The comparison of the liquid and solid phase data clearly allows the role of the solvent in the relaxation processes to be eliminated.