Broadband ultrafast transient absorption of iron (III) tetraphenylporphyrin chloride in the condensed phase

A cascade through spin states in the ultrafast haem relaxation of met-myoglobin

“…Moreover, the outcome of this work supports the idea that the energy and shape of the Fe-porphyrin visible spectral features (Q-and Soret bands) are strongly related to the distribution of electronic charge between the metal and the Nitrogens of the macrocycle. While the decay pathway observed here is quite specific to metMb because of its high spin (S = 5/2) GS, a photocycle passing through different spin states may be a general pattern for haem proteins and porphyrin-based compounds, as was recently reported for Fe III -tetraphenylporphyrin 43 and ferric MbN 3 . 17 We plan further studies on ferrous myoglobins to investigate the presence of electronic haem relaxation channels, their relation to ligand dissociation and thus, their biological relevance.…”

Primary reactions in the photochemistry of hexahalide complexes of platinum group metals: A minireview

“…<ground state>. The species-associated difference spectra (SADS) of the individual components are then calculated using the expressions [59]:…”

Solvent-dependent absorption and electronic relaxation dynamics of iron (III) tetra-4-N-methylpyridylporphine

“…The electronic absorption properties of metalloporphyrins depend on the π-conjugated system of the porphyrin, whereas the relaxation properties are strongly influenced by the centrally ligated metal. 5,6,13,14,15 Ultrafast spectroscopy has been an invaluable tool for understanding electronic dynamics in porphyrins. 13,14,15,16,17,18 Metalloporphyrins containing metal atoms with unfilled dorbitals [e.g.…”

“…5,6,13,14,15 Ultrafast spectroscopy has been an invaluable tool for understanding electronic dynamics in porphyrins. 13,14,15,16,17,18 Metalloporphyrins containing metal atoms with unfilled dorbitals [e.g. Ni(II), Cu(II), Fe(III)] have been shown experimentally to rapidly dissipate energy through a ligand-to-metal charge transfer (LMCT) channel, which is not efficient in the presence of filled d orbitals such as Zn(II)TPP.…”