Abstract
On the basis of transient absorption spectral measurements in the whole visible region using femtosecond diffuse reflectance spectroscopy, a hole transfer process from photoexcited TiO2 to an adsorbed molecule SCN- was elucidated. In a TiO2 aqueous suspension with KSCN, absorption rise of dimer radical anion (SCN)2•- was observed indicating hole transfer. Interestingly, there were two rise components with <1 ps and several 100 ps, which were shorter in lower pH of the solution. Ultrafast hole transfer and subsequent intermolecular geometrical change of a dimmer radical anion are also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 177-187 |
| Number of pages | 11 |
| Journal | Research on Chemical Intermediates |
| Volume | 27 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 17 May 2001 |
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Furube, A., Asahi, T., Masuhara, H., Yamashita, H., & Anpo, M. (2001). Direct observation of interfacial hole transfer from a photoexcited TiO2 particle to an adsorbed molecule SCN- by femtosecond diffuse reflectance spectroscopy. Research on Chemical Intermediates, 27(1-2), 177-187. https://doi.org/10.1163/156856701745069