منابع مشابه
Spin delocalization over type zero copper.
Hard-ligand, high-potential copper sites have been characterized in double mutants of Pseudomonas aeruginosa azurin (C112D/M121X (X = L, F, I)). These sites feature a small A(zz)(Cu) splitting in the EPR spectrum together with enhanced electron transfer activity. Due to these unique properties, these constructs have been called "type zero" copper sites. In contrast, the single mutant, C112D, ...
متن کاملType Zero Copper Proteins
Many proteins contain copper in a range of coordination environments, where it has various biological roles, such as transferring electrons or activating dioxygen. These copper sites can be classified by their function or spectroscopic properties. Those with a single copper atom are either type 1, with an intense absorption band near 600 nm, or type 2, with weak absorption in the visible region...
متن کاملSpin moment over 10–300K and delocalization of magnetic electrons above the Verwey transition in magnetite
In order to probe the magnetic ground state, we have carried out temperature-dependent magnetic Compton scattering experiments on an oriented single crystal of magnetite ðFe3O4Þ, together with the corresponding first-principles band theory computations to gain insight into the measurements. An accurate value of the magnetic moment mS associated with unpaired spins is obtained directly over the ...
متن کاملCritical Delocalization of Chiral Zero Energy Modes in Graphene.
Graphene subjected to chiral-symmetric disorder is believed to host zero energy modes (ZEMs) resilient to localization, as suggested by the renormalization group analysis of the underlying nonlinear sigma model. We report accurate quantum transport calculations in honeycomb lattices with in excess of 10^{9} sites and fine meV resolutions. The Kubo dc conductivity of ZEMs induced by vacancy defe...
متن کاملCopper clusters built on bulky amidinate ligands: spin delocalization via superexchange rather than direct metal-metal bonding.
Entry into a new class of tetra- and dicopper clusters was assisted by a fine steric tuning of bulky amidinate ligands that provide spin-delocalizing superexchange pathways in class III mixed-valence clusters, the properties of which are best understood without invoking metal-metal bonding.
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ژورنال
عنوان ژورنال: Inorganic Chemistry
سال: 2012
ISSN: 0020-1669,1520-510X
DOI: 10.1021/ic202336m