Photophysical and photocatalytic properties of corrophyll and chlorophyll

First report oftrans-A2B-corrole derived from a lapachone derivative: photophysical, TD-DFT and photobiological assays

“…The data were obtained at the ground state equilibrium geometry for each compound. 28 We can notice a very similar absorbance behavior between all the solvents, with a slight red shift observed in acetonitrile. As peculiar in corrole-conjugated molecules, 29 we found two peaks at the Q-band (∼510 and ∼535 nm), which correspond to S 0 → S 1 and S 0 → S 2 transitions, and a more pronounced peak at approximately 370 nm in the Soret band, which correspond to an S 0 → S 3 transition.…”

Corrole–Fullerene Dyads: Stability, Photophysical, and Redox Properties

“…Previous works have shown that donor substituents tend to lower oxidation and reduction potentials, while acceptor substituents tend to increase the redox potentials . The interplay of these factors lead to redox potentials for the corrole–fullerene dyads (relative to SHE) that are summarized in Figure .…”

“…The absorption properties of a material are directly related to their electronic structure. , Figure shows the density of states (DOS) and the corresponding individual atomic contribution to the DOS (PDOS) of the six corrole–fullerene dyads. For the cases in which only one fullerene is attached to the corrole macrocycle (β-1A and β-1B and meso -A and meso -B), the results clearly shows a substantial influence of the fullerene carbon atoms (red curves) on the frontier electronic states, mainly in the lowest unoccupied molecular orbitals (LUMOs).…”

“…Porphyrinoids have posed as natural candidates to perform as photoactive catalysts, mostly due to its resemblance to the natural photosynthetic chlorophyll pigment . Additionally, porphyrin-like molecules with interesting photophysical and redox properties, such as chlorins and corroles, − have also been successfully utilized as active components in donor–acceptor systems.…”

“…Previous works have shown that donor substituents tend to lower oxidation and reduction potentials, while acceptor substituents tend to increase the redox potentials. 5 The interplay of these factors lead to redox potentials for the corrole−fullerene dyads (relative to SHE) that are summarized in Figure 6. Markedly, three out of six systems show suitable redox gaps for the water splitting process required in the HER: the one-fullerene β-substituted corroles (β-1A and β-1B) and the two-fullerene β-2A system.…”