✦ LIBER ✦
Reduction of acceptor relay species by conduction band electrons of colloidal titanium dioxide; light-induced charge separation in the picosecond time domain
✍ Scribed by Nick Serpone; Devendra K. Sharma; Jacques Moser; Michael Grätzel
- Book ID
- 103025447
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 422 KB
- Volume
- 136
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Photoinduced interfacial electron transfer from the conduction band of colloidal TiOl semiconductor particles to the cofacial dimeric viologen DV"+, an electron acceptor, occurs in the picosecond time domain. The interfacial electron-transfer rate constant is about 2x 10" SK' at pH 7.8. The reaction involves consecutive one-electron transfer to give the monoreduced DV3+ initially, followed by formation of DV '+ In acidic aqueous media (pH 3.5) transient picosecond absorption spectra show the .
formation of the monoreduced species only.