Abstract
Subpicosecond time-resolved absorption studies have been carried out on several lanthanide porphyrin complexes consisting of a Ce(IV) ion sandwiched between two strongly coupled cofacial porphyrin macrocycles. Following excitation, two relaxation processes having time constants of ∼1.5 and ∼10 ps are observed. The 1.5-ps process is attributed to excited-state deactivation to the electronic ground state via a low-lying ring-to-metal charge-transfer state. Relaxation of the resultant vibrationally excited ground electronic state can account for the complex spectral dynamics observed at longer times.
| Original language | English |
|---|---|
| Pages (from-to) | 3508-3512 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry |
| Volume | 94 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1990 |