Interligand Electron Transfer Dynamics in the MLCT Excited State of Ru(4,4’-dicarboxylate-2,2’-bipyridine)2cis(NCS)2 Studied by Transient IR Absorption Anisotropy
(English)Manuscript (preprint) (Other academic)
We have studied the interligand electron transfer (ILET) in the N712 dye (deprotonated N3) by means of IR transient IR absorption anisotropy. By probing vibrational transitions in the IR we can provide stronger evidence than previous studies that probed the electronic transitions in the visible. The results show that the observation of ILET is limited by the rotational time of the complex, and this gives a lower rate of 800 ns for ILET. Previously reported results have been both very fast and very slow, with timeconstants 20 ps and 3 ns respectively and the results presented here supports the slower rate. The initial anisotropy trace show an increase with a 5 ps time-constant, and the initial value corresponds to what is expected for a delocalized state. We note however that the time-scale of delocalization is unexpectedly slow.
electron transfer, inter ligand electron transfer, dye sensisized solar cells, N3, N712
Research subject Chemistry with specialization in Chemical Physics
IdentifiersURN: urn:nbn:se:uu:diva-235458OAI: oai:DiVA.org:uu-235458DiVA: diva2:760406