281211-15-2Relevant academic research and scientific papers
Porphyrin-Hexaphenylbenzene Conjugates via Mixed Cyclotrimerization Reactions
Martin, Max M.,Dill, Maximilian,Langer, Jens,Jux, Norbert
, p. 1489 - 1499 (2019)
Mixed cyclotrimerization reactions of diarylacetylenes (tolans) were applied to generate a library of multiple porphyrin-hexaphenylbenzene (HPB) architectures. Successful reactions, which could be influenced by the ratio of tolan starting materials, were
Bis-porphyrin arrays. Part 3. 1 the synthesis of model bisporphyrin dimers and an electrochemical study
Beavington, Richard,Burn, Paul L.
, p. 1231 - 1240 (2000)
We have successfully synthesised exo and endo diphenylacetylene linked bis-porphyrin dimers. We found that the exo-bis-porphyrin dimer could be easily prepared in good yield whilst the endo-dimer was harder to form due to the steric constraints of the wejo-substituents. Electrochemical studies indicated that the porphyrin centred reductions of the bis-porphyrin dimers were dominated by the bis-porphyrin moieties. We found that the first four one-electron reductions of the exo- and endo-bis-porphyrin dimers occurred at similar potentials. Finally, at more negative potentials the bis-porphyrin dimers were reduced further which significantly changed the subsequent oxidation processes. This is thought to be due to a conformational change in the molecule which causes a change in orbital . density in the "excited state". The Royal Society of Chemistry 2000.
Porphyrin-rylene-diimide-hexabenzocoronene triads
Martin, Max M.,Dusold, Carolin,Hirsch, Andreas,Jux, Norbert
, p. 268 - 277 (2020)
Hexa-peri-hexabenzocoronenes (HBCs), substituted by two different chromophores in an ortho arrangement, were synthesized for the first time and investigated towards their photophysical properties. Rylene-diimide dyes, in particular naphthalene-diimides (NDIs) and perylene-diimides (PDIs), were attached to the HBC as the first, and porphyrins as the second chromophore. Therefore, porphyrin-NDI-HPB as well as porphyrin-PDI-HPB precursors were accessed and converted into the respective HBC derivatives applying oxidative Scholl conditions. UV-vis absorption and fluorescence emission spectroscopy showed interesting photophysical behavior such as energy transfer processes. Particularly, the porphyrin-PDI-HBC displays pronounced absorption features between 330-650 nm, which cover a wide range of the visible spectrum.
