Metal complexes with tetrapyrrole ligands. Part 73. Oxidation and reduction of cerium(IV) sandwich complexes with porphyrin ligands linked by aliphatic diether bridges of variable chain length was written by Buchler, Johann W.;Dippell, Torsten. And the article was included in European Journal of Inorganic Chemistry in 1998.Formula: C47H36N4O The following contents are mentioned in the article:
Starting from 5-(4-hydroxyphenyl)-10,15,20-tris(4-methylphenyl)porphyrin (HL) the new bis(porphyrinyloxy)alkanes L2(CH2)n (n = 8, 11) I and II, resp., were synthesized by ether formation with the ¦Á,¦Ø-dibromoalkanes Br(CH2)nBr. Compound I was obtained by a 2-step reaction with the 5-[4-(8-bromooctyloxy)phenyl]-10,15,20-tris(4-methylphenyl)porphyrin as an intermediate. The diporphyrins I and II were metalated with Ce(III) acetylacetonate to yield the new (porphyrin)-Ce sandwich complexes III (n = 8 and 11) which were characterized by UV/Vis, IR, 1H-NMR, 13C-NMR spectroscopy and cyclic voltammetry. The mono- and dications and the Ce(III) bisporphyrinate anions of III (n = 8-11) were produced by electrochem. oxidation and reduction, resp., and were examined by UV/Vis/NIR spectroscopy. The length of the lateral chains does not have a specific effect on the 1st and 2nd oxidation potentials of the porphyrin rings and the reduction potentials of the Ce ions in the bisporphyrinate systems, and on the energy of the NIR bands of the monocations. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Formula: C47H36N4O).
4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. The atoms and molecules used as ligands are almost always those that are capable of functioning as the electron-pair donor in the electron-pair bond (a coordinate covalent bond) formed with the metal atom. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Formula: C47H36N4O
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI