Visible light-induced electron ejection from anions
Abstract
The photochemistry of carbanions at the surface of a doped n-TiO2 electrode is described. Resonance stabilized anions (A-) often strongly absorb visible light, giving rise to photoreactivity initiated by primary photochemical electron transfer. In the absence of reactive electron acceptors, this electron ejection is often followed by rapid thermal collapse of the radical electron pair to regenerate the anionic starting material. Thus, the observation of solution phase photochemistry in carbanions depends directly on inhibition of electron recapture. Since this inhibition is a key feature of photoelectrochemistry at semiconductor electrodes, it is anticipated that a parallel may exist between photocurrent production in anion sensitized photogalvanic cells and relative quantum efficiency for homogeneous photoreactions of such anions.
- Publication:
-
Presented at the 3rd Intern. Conf. on Photochem. Conversion and Storage of Solar Energy
- Pub Date:
- 1980
- Bibcode:
- 1980pcss.conf.....F
- Keywords:
-
- Anions;
- Electron Transfer;
- Photochemical Reactions;
- Anions;
- Carbon;
- Electrodes;
- Photoelectrochemistry;
- Quantum Efficiency;
- Semiconductor Devices;
- Titanium Oxides;
- Solid-State Physics