Abstract
The upper S2 excited state of the Zn(porphyrin) unit of the ZnP-(amide)-Ru(bpy)3 dyad undergoes an ultrafast (k = 6 × 1011 s-1) electron transfer to Ru(bpy)32+ which is 60 times faster than from the lowest S1 singlet state. On the other hand, the S2 state of the ZnP-(Pt)-Ru(bpy)3 dyad does not show an electron transfer. Instead, an ultrafast energy transfer occurs from the S2 state of ZnP to the singlet excited state of Ru(bpy)32+, with a rate constant of about 3 ×1011 s-1. The excited-state dynamics of ZnP-(Pt)-Ru(bpy)3 also involves energy transfer from the Si state of ZnP to Ru(bpy)32+ and from the triplet excited state of Ru(bpy)32+ to the lowest triplet state of ZnP.
| Original language | English |
|---|---|
| Pages (from-to) | 863-869 |
| Number of pages | 7 |
| Journal | Chemtracts |
| Volume | 12 |
| Issue number | 12 |
| Publication status | Published - Nov 1 1999 |
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ASJC Scopus subject areas
- Chemistry(all)
- Biochemistry
- Molecular Biology
Cite this
LeGourriérec, D., Andersson, M., Davidsson, J., Mukhtar, E., Sun, L., Hammarström, L., Harriman, A., Hissler, M., Trompette, O., & Ziessel, R. (1999). Photoinduced electron transfer from a higher excited state of a porphyrin in a zinc porphyrin-ruthenium(II)tris-bipyridine dyad: Energy transfer in molecular dyads comprising metalloporphyrin and ruthenium(II) tris(2,2'-bipyridyl) terminals. Competition between internal conversion and energy transfer in the upper excited singlet state of the porphyrin. Chemtracts, 12(12), 863-869.