6533b7d1fe1ef96bd125c08b
RESEARCH PRODUCT
Complexes of tetra(parasulphonatephenyl)porphyrinato ferrate(III), FeTPPs, with 1,10 phenanthroline and 2,2′ bipyridine ligands
José M. MoratalHermas R. JiménezJuan FausE. Descalzosubject
Aqueous solutionDimerPhenanthrolinePhotochemistryMedicinal chemistryPorphyrin22'-BipyridineInorganic Chemistrychemistry.chemical_compoundBipyridineMonomerchemistryMaterials ChemistryMoleculePhysical and Theoretical Chemistrydescription
Abstract Iron(III) porphyrin, FeTPPS, gives high-spin 1:1 monomeric complexes with the ligands 1,10 phenanthroline, 2,9 dimethylphenanthroline and 2,2 bipyridine in aqueous solution. Absorption spectrum of the complexes is very different to the one of the monomer metalloporphyrin, but nearly identical to the visible spectrum of the μ-oxo dimer Fe2(TPPS)2O. A spectrophotometric study of the formation equilibria yields the following values of the stability constants: Me2phen 4.3 × 104, phen 1.1 × 104, bipy 2.0 × 102 (25 °C, 0.1 M NaNO3). Analysis of the experimental data strongly suggest that the ligands are hydrogen bonded to one coordinated water molecule (TPPS)FeOH2 → (LL). Although the ligands are not directly coordinated to iron(III) they can displace both coordinated imidazoles in the complex FeTPPS(HIm)2. We have isolated the phenanthroline complex as a phenanthrolinium compound (Hphen)3 [(Fe(TPPS)H2Ophen].
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1985-09-01 | Inorganica Chimica Acta |