Abstract
Photochemical reactions between photo-excited C60 and borates (-BPh4 and -BPh3Bu) have been investigated by steady-state photolysis and laser flash photolysis. On steady-state photolysis of C60 in the presence of the borates in polar solvents, the absorption OfC60-• increases with irradiation time, suggesting that irreversible photoinduced electron-transfer occurs. By the measurements of the transient absorption spectra, it is indicated that electron transfer takes place from the borate anions to 3C60*, yielding C60-• and •BPh3R (R = Ph or Bu), in which the latter dissociates into Ph3B and R•, yielding biphenyl (or octane). Electron-donor ability of -BPh3 Bu is higher than that of -BPh4, while the steady-state photolysis to a C60/borate system shows an opposite tendency. The addition reaction of C60-• with Bu• yielding BuC60- is more efficient than that with Ph• producing PhC60-. The rate constant of electron-transfer via the triplet state of C60 increases with solvent polarity.
| Original language | English |
|---|---|
| Pages (from-to) | 551-556 |
| Number of pages | 6 |
| Journal | Journal of the Chemical Society. Perkin Transactions 2 |
| Issue number | 3 |
| Publication status | Published - 1999 Mar |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Persistent C60 anion-radical formation via photoinduced electron transfer from tetraphenylborate and triphenylbutylborate. / Konishi, Toshifumi; Sasaki, Yoshiko; Fujitsuka, Mamoru; Toba, Yasumasa; Moriyama, Hiroshi; Ito, Osamu.
In: Journal of the Chemical Society. Perkin Transactions 2, No. 3, 03.1999, p. 551-556.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Persistent C60 anion-radical formation via photoinduced electron transfer from tetraphenylborate and triphenylbutylborate
AU - Konishi, Toshifumi
AU - Sasaki, Yoshiko
AU - Fujitsuka, Mamoru
AU - Toba, Yasumasa
AU - Moriyama, Hiroshi
AU - Ito, Osamu
PY - 1999/3
Y1 - 1999/3
N2 - Photochemical reactions between photo-excited C60 and borates (-BPh4 and -BPh3Bu) have been investigated by steady-state photolysis and laser flash photolysis. On steady-state photolysis of C60 in the presence of the borates in polar solvents, the absorption OfC60-• increases with irradiation time, suggesting that irreversible photoinduced electron-transfer occurs. By the measurements of the transient absorption spectra, it is indicated that electron transfer takes place from the borate anions to 3C60*, yielding C60-• and •BPh3R (R = Ph or Bu), in which the latter dissociates into Ph3B and R•, yielding biphenyl (or octane). Electron-donor ability of -BPh3 Bu is higher than that of -BPh4, while the steady-state photolysis to a C60/borate system shows an opposite tendency. The addition reaction of C60-• with Bu• yielding BuC60- is more efficient than that with Ph• producing PhC60-. The rate constant of electron-transfer via the triplet state of C60 increases with solvent polarity.
AB - Photochemical reactions between photo-excited C60 and borates (-BPh4 and -BPh3Bu) have been investigated by steady-state photolysis and laser flash photolysis. On steady-state photolysis of C60 in the presence of the borates in polar solvents, the absorption OfC60-• increases with irradiation time, suggesting that irreversible photoinduced electron-transfer occurs. By the measurements of the transient absorption spectra, it is indicated that electron transfer takes place from the borate anions to 3C60*, yielding C60-• and •BPh3R (R = Ph or Bu), in which the latter dissociates into Ph3B and R•, yielding biphenyl (or octane). Electron-donor ability of -BPh3 Bu is higher than that of -BPh4, while the steady-state photolysis to a C60/borate system shows an opposite tendency. The addition reaction of C60-• with Bu• yielding BuC60- is more efficient than that with Ph• producing PhC60-. The rate constant of electron-transfer via the triplet state of C60 increases with solvent polarity.
UR - http://www.scopus.com/inward/record.url?scp=0001224664&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001224664&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0001224664
SP - 551
EP - 556
JO - Journal of the Chemical Society, Perkin Transactions 2
JF - Journal of the Chemical Society, Perkin Transactions 2
SN - 1470-1820
IS - 3
ER -