Metal complexes with tetrapyrrole ligands. Part 72. Cerium(IV) sandwich complexes with porphyrin ligands linked by aliphatic and quinone-containing bridges was written by Buchler, Johann;Heinz, Georg. And the article was included in Chemische Berichte in 1996.Product Details of 57412-08-5 The following contents are mentioned in the article:
Starting from 5-(4-hydroxyphenyl)-10,15,20-tris(4-methylphenyl)porphyrin, the bis(porphyrinylphenoxy)alkanes I {X = (CH2)9, (CH2)10, 1-(CH2)3[2,5-(MeO)C6H2]-4-(CH2)3 (II)} were synthesized by etherification. The hydroquinone di-Me ether II was converted into the diporphyrin-quinone by ether cleavage with BBr3 and subsequent oxidation with ammonium cerium nitrate. The bisporphyrins were metalated with Ce(acac)3 to yield the corresponding Ce porphyrin sandwich complexes which carry the alkane links in vicinal positions at the porphyrin rings. They were characterized by UV/Vis, IR, 1H NMR, and cyclic voltammetry. The quinone-bridged Ce sandwich complex contains the quinone moiety in a distinct non-coplanar orientation relative to the porphyrin ligands of the double-decker system. The length of the lateral chains may have a dramatic effect on the 1st and 2nd oxidation potentials, E3 and E2, of the porphyrin rings. For I [X = (CH2)10], E3 and E2 are higher by 0.26 and 0.24 V, resp., as compared with I [X = (CH2)9]. E3 and E2 for the latter are rather close to values for species with dipropylbenzene chains or without lateral bridges. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Product Details of 57412-08-5).
4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Attachment of the ligand to the metal may be through a single atom, in which case it is called a monodentate ligand, or through two or more atoms, in which case it is called a didentate or polydentate ligand. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.Product Details of 57412-08-5
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI