✦ LIBER ✦
Ultrafast photoinduced charge separation and recombination in weakly bound complexes between oxazine dyes and N,N-dimethylaniline
✍ Scribed by Siegfried Schneider; Wolfgang Stammler; Rudolf Bierl; Wighard Jäger
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 566 KB
- Volume
- 219
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The association constants between cresyl violet (CV) and oxazine 170 (OX) with N,N-dimethylaniline (DMA) were determined for methanolic solution to be 0.3 k 0.15 Q/mol and 0.15 0.06 B/mol. One-colour pump-probe experiments showed a biphasic recovery of the ground state absorption. The short-lived component is assigned to the fast electron back-transfer within dye-amine complexes ( 1.4 + 0.2 ps for CV and 2.0 + 0.3 ps for OX), because the observed reduction in maximum bleaching parallels the amount of dye bound in weak complexes with DMA.