Abstract
Proton-coupled electron transfer (PCET) was examined in a series of biomimetic, covalently linked Ru II(bpy) 3-tyrosine complexes where the phenolic proton was H-bonded to an internal base (a benzimidazyl or pyridyl group). Photooxidation in laser flash/quench experiments generated the Ru III species, which triggered long-range electron transfer from the tyrosine group concerted with short-range proton transfer to the base. The results give an experimental demonstration of the strong dependence of the rate constant and kinetic isotope effect for this intramolecular PCET reaction on the effective proton transfer distance, as reflected by the experimentally determined proton donor-acceptor distance.
| Original language | English |
|---|---|
| Pages (from-to) | 13224-13227 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 133 |
| Issue number | 34 |
| DOIs | |
| Publication status | Published - Aug 31 2011 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Proton-coupled electron transfer from tyrosine : A strong rate dependence on intramolecular proton transfer distance. / Zhang, Ming Tian; Irebo, Tania; Johansson, Olof; Hammarström, Leif.
In: Journal of the American Chemical Society, Vol. 133, No. 34, 31.08.2011, p. 13224-13227.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Proton-coupled electron transfer from tyrosine
T2 - A strong rate dependence on intramolecular proton transfer distance
AU - Zhang, Ming Tian
AU - Irebo, Tania
AU - Johansson, Olof
AU - Hammarström, Leif
PY - 2011/8/31
Y1 - 2011/8/31
N2 - Proton-coupled electron transfer (PCET) was examined in a series of biomimetic, covalently linked Ru II(bpy) 3-tyrosine complexes where the phenolic proton was H-bonded to an internal base (a benzimidazyl or pyridyl group). Photooxidation in laser flash/quench experiments generated the Ru III species, which triggered long-range electron transfer from the tyrosine group concerted with short-range proton transfer to the base. The results give an experimental demonstration of the strong dependence of the rate constant and kinetic isotope effect for this intramolecular PCET reaction on the effective proton transfer distance, as reflected by the experimentally determined proton donor-acceptor distance.
AB - Proton-coupled electron transfer (PCET) was examined in a series of biomimetic, covalently linked Ru II(bpy) 3-tyrosine complexes where the phenolic proton was H-bonded to an internal base (a benzimidazyl or pyridyl group). Photooxidation in laser flash/quench experiments generated the Ru III species, which triggered long-range electron transfer from the tyrosine group concerted with short-range proton transfer to the base. The results give an experimental demonstration of the strong dependence of the rate constant and kinetic isotope effect for this intramolecular PCET reaction on the effective proton transfer distance, as reflected by the experimentally determined proton donor-acceptor distance.
UR - http://www.scopus.com/inward/record.url?scp=80052087589&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052087589&partnerID=8YFLogxK
U2 - 10.1021/ja203483j
DO - 10.1021/ja203483j
M3 - Article
VL - 133
SP - 13224
EP - 13227
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 34
ER -