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.
|Number of pages||7|
|Publication status||Published - Nov 1 1999|
ASJC Scopus subject areas
- Molecular Biology