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Doubly meso-β-Linked Diporphyrins from Oxidation of 5,10,15-Triaryl-Substituted NiII- and PdII - Porphyrins
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2000
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Inorganic ChemistryChemical EngineeringEngineeringPhotochemistry5,10,15-Triaryl-substituted Niii-Lower Oxidation PotentialsMeso-β-linked DiporphyrinsFused DiporphyrinOrganic ChemistryPhysical ChemistryOrganometallic CatalysisRedox ChemistryOne-electron OxidationChemistryHalogenationDerivative (Chemistry)
Lower oxidation potentials than for the monomeric starting materials are displayed by the diporphyrins obtained by one-electron oxidation with tris(4-bromophenyl)ammonium hexachloroantimonate [see, for example, Eq. (1)]. This and the strong red shift observed for the Soret bands of the product are indicative of extensively delocalized pi-electron systems in the fused diporphyrin. Ar=3,5-di-tert-butylphenyl.