• Molecules
  • They find that electron- acceptor molecules such as trinitrobenzene (TNB) form 1:1 adducts with the expanded porphyrins, which leads to changes in color and can produce columnar stacking and the formation of discotic mesophases. (sciencemag.org)
  • Radicals
  • Due to their distinctive radical mechanisms that involve metal-stabilized radical intermediates, such as α-metalloalkyl radicals, α-metalloaminyl radicals, and α-metalloxyl radicals, the Co(II)-porphyrin-based catalysis system addresses some long-standing challenges in organic transformations. (wikipedia.org)
  • Stable metalloradicals such as Co-porphyrin catalysis activate diazo reagents and organic azides to generate C- and N-centered radicals, respectively, with nitrogen as the only byproduct in a controlled and catalytic manner. (wikipedia.org)
  • The initially formed C- and N-centered radicals can undergo common radical reactions such as radical addition and atom abstraction, but with effective control of reactivity and stereoselectivity by the porphyrin ligand environment. (wikipedia.org)
  • metal ion
  • Third, it has been well documented that the physical and chemical properties of a porphyrin complex of a given metal ion can be systematically tuned by introducing peripheral substituents with varied electronic, steric, and conformational environments on the aromatic ring structure of the porphyrin ligand. (wikipedia.org)
  • good
  • The obtained porphyrin-based glycocluster shows not only good water-solubility but also strong/specific lectin-affinity. (hindawi.com)
  • Co(II)-porphyrin catalysts has good thermal and metal coordination stability resulting from the macrocyclic chelation effect of the aromatic ligand. (wikipedia.org)