Journal ArticleDOI
Why Does the Active Form of Galactose Oxidase Possess a Diamagnetic Ground State
Jochen Müller,Thomas Weyhermüller,Eckhard Bill,Peter Hildebrandt,Linda Ould-Moussa,Thorsten Glaser,Karl Wieghardt +6 more
TLDR
The relative orientation of the two magnetic orbitals, the CuII d’ x 2-y2 orbital and the half-occupied π orbital of the tyrosyl radical, is the key to answering the question in the title.Abstract:
The relative orientation of the two magnetic orbitals, the CuII d x 2-y 2 orbital and the half-occupied π orbital of the tyrosyl radical, is the key to answering the question in the title. The arrangement shown (CuII -O-C bond angle of about 130° and a dihedral angle of about 90° between the x,y plane of the CuII polyhedron and the tyrosyl ring plane) leads to an overlap of the orbitals, which results in a singlet ground state.read more
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General Predictive Syntheses of Cubic, Hexagonal, and Lamellar Silica and Titania Mesostructured Thin Films§
Peter C.A. Alberius,Karen L. Frindell,Ryan C. Hayward,Edward J. Kramer,Galen D. Stucky,Bradley F. Chmelka +5 more
TL;DR: In this paper, a cubic mesostructure with crystalline TiO2 (anatase) in the walls, stable to 400 °C, was synthesized by varying the volume ratio between the copolymer and inorganic components of the precursor solution.
Journal ArticleDOI
Aerobic Oxidation of Primary Alcohols (Including Methanol) by Copper(II)− and Zinc(II)−Phenoxyl Radical Catalysts
Phalguni Chaudhuri,Martina Hess,Jochen Müller,Knut Hildenbrand,Eckhard Bill,and Thomas Weyhermüller,Karl Wieghardt +6 more
TL;DR: The tetradentate ligand N,N-bis(3,5-di-tert-butyl-2-hydroxyphenyl)-1,2-phenylenediamine, H4L1, has been prepared as mentioned in this paper.
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Understanding the copper–phenoxyl radical array in galactose oxidase: contributions from synthetic modeling studies
TL;DR: In this article, the authors surveyed the progress toward the synthesis and structural and spectroscopic characterization of model complexes of the galactose oxidase (GAO) active site and concluded with a description of more recent discoveries of catalytic reactivity by Cu(II)-phenoxyl radical species that replicate and provide insights into GAO function.
Journal ArticleDOI
Ligands that Store and Release Electrons during Catalysis
TL;DR: Electron(ic) banking: First-row transition metals can be given a noble character by redoxactive ligands, thus enabling two electron oxidative addition and reductive elimination steps as mentioned in this paper.
Journal ArticleDOI
Monolithic Mesoporous Silica Templated by Microemulsion Liquid Crystals
TL;DR: In this paper, a generalized method for the synthesis of periodic mesoporous silica by direct liquid crystal templating in multicomponent surfactant and cosurfactant systems is presented.