title: Porphyrin macrocyclic catalysts for the processive oxidation of polymer substrates.
abstract: A novel cavity-containing porphyrin catalyst based on a previously reported clip architecture, substituted on the outer face with urea terminated tails, has been synthesized, and its properties toward the epoxidation of polybutadiene have been studied. It is shown that the presence of the urea tails provides efficient shielding of the manganese porphyrin against destruction and selectively directs the oxidation process to the inside of the catalyst cage, allowing for processive oxidation of a polymer substrate without the need of an additional axial ligand.
authors.affiliation: Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
authors.forename: Cyrille
authors.initials: C
authors.lastname: Monnereau
authors.forename: Pilar Hidalgo
authors.initials: PH
authors.lastname: Ramos
authors.forename: Alexander B C
authors.initials: AB
authors.lastname: Deutman
authors.forename: Johannes A A W
authors.initials: JA
authors.lastname: Elemans
authors.forename: Roeland J M
authors.initials: RJ
authors.lastname: Nolte
authors.forename: Alan E
authors.initials: AE
authors.lastname: Rowan
mesh_terms: D002070:Butadienes / Q000737:chemistry*; D002384:Catalysis; D020724:Elastomers / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011166:Porphyrins / Q000737:chemistry*; D014508:Urea / Q000737:chemistry
chemical_list: D002070:Butadienes; D020724:Elastomers; D011166:Porphyrins; D014508:Urea; C028834:polybutadiene