Triplet-Triplet Excitation Transfer in Palladium Porphyrin-Fullerene and Platinum Porphyrin-Fullerene Dyads was written by Obondi, Christopher O.;Lim, Gary N.;D’Souza, Francis. And the article was included in Journal of Physical Chemistry C in 2015.COA of Formula: C47H36N4O The following contents are mentioned in the article:
Covalently linked donor-acceptor dyads involving Pd(II) and Pt(II) porphyrins as triplet sensitizers and fullerene as an acceptor were newly synthesized. These dyads were characterized by optical absorbance, emission, and electrochem. methods. In contrast to the earlier reported Zn(II) porphyrin and free-base porphyrin-based dyads of similar structures, photoinduced electron transfer from the short-lived singlet and long-lived triplet excited metalloporphyrin to the fullerene was not observed, although these processes are energetically possible according to the energy level diagrams. That is, diagnostic transient bands corresponding to MP?+ [M = Pd(II) or Pt(II)] in the 600-650-nm range and C60?- in the 1000-nm range were absent in the femtosecond and nanosecond transient absorption spectra. Excited energy transfer from the triplet excited metalloporphyrin to the fullerene was witnessed in both Pd and Pt porphyrin-derived dyads by nanosecond transient absorption studies. Three solvents with different polarities were employed to visualize the medium effects. The determined rate of energy transfer, kEnT, is higher for the PdP-based dyad than the PtP-based dyad in a given solvent and that the rates were higher for polar solvents than for nonpolar solvent. The present study demonstrates how the heavy-metal ion in the porphyrin cavity modulates photoinduced processes and the solvent-dependent kinetics of these events. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5COA of Formula: C47H36N4O).
4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.COA of Formula: C47H36N4O
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI