نتایج جستجو برای: metal exchange
تعداد نتایج: 382180 فیلتر نتایج به سال:
A cubic cationic cage is rationally designed by using tridentate boron-imidazolate ligands to link tetrahedral metal Zn(ii) centers, which displays excellent properties in the Cr2O7(2-) exchange and can reduce Au(3+) ions into Au nanoparticles directly.
Biocompatible ZnMoS4 NPs can selectively remove intracellular copper ions via ion-exchange rather than chelation. This strategy represents a paradigm shift in designing new-generation intracellular metal detoxifying drugs.
....................................................................................................................... iii ACKNOWLEDGEMENTS .................................................................................................. v LIST OF TABLES ............................................................................................................. viii LIST OF FIGURES ............
In this work, a review of articles and patents related to the utilization of colloidal metal nanoparticles produced by the decomposition of organometallic precursors as supported electrocatalysts in different electrochemical reactions including hydrogen evolution reaction (HER), oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) is discussed. In the case of stabilized metal n...
Here, we report for the first time on the successful fabrication of monodispersed silver nanocubes with regular shape and controlled size in the solid phase via a novel ion-exchange self-assembly technique by using water-soluble poly(amic acid) salt as the intermediate and silver nitrate as the metal precursor. By simply altering the annealing times at high temperature, the size of the silver n...
The first metal complexes of 2,5-di(2-pyridyl)thiazolo[5,4-d]thiazole (5) are described. X-Ray crystal structures are reported for the free ligand 5, a dinuclear copper complex 6 and the two diastereoisomers, 7meso and 7rac, of the dinuclear bis(2,2'-bipyridine)ruthenium complex. The two diastereoisomers of 7 and the 4,4'-dimethyl-2,2'-bipyridine analogue 8 are readily separated by cation excha...
The effect of hole doping on the exchange coupling of the nearest neighbor (NN) Mn pairs in Zn(1-x)MnxTe is probed by inelastic neutron scattering. The difference in the NN exchange energy DeltaJ1 in the presence and in the absence of the holes is determined. The obtained value of DeltaJ1 is in good agreement with the predictions of the Zener/RKKY model, even on the insulator side of the metal-...
The difference in steric profiles for eta(5) and eta(1)-pyrrolyls can be used to modify barriers for pyrrolyl exchange. The method investigated incorporated 1,3-diaxial interactions in a cyclohexyl backbone of the dipyrrolylmethane. Some of the enthalpic barrier created with the 1,3-steric interactions appears to be mediated by increased entropy in the ground state, but noticeable changes are p...
5. Abstract Using results of the band structure calculations in the local-spin-density approximation we demonstrate how the crystal distortions affect the magnetic structure of orthorhombically distorted perovskites leading to a non-collinear spin arrangement. Our results suggest that the non-collinearity of the spin magnetic moments, being generally small in LaMO 3 series with M=Cr-Fe, is larg...
Using ab initio electronic structure calculations employing the LDA+U method we have investigated the exchange coupling in materials containing Eu in Eu formal valency including: (i) insulating ferromagnets (EuO, EuS, EuSe, EuTe), and (ii) elemental metal BCC Eu. The total energies calculated with constrained magnetic structures were mapped on the Heisenberg Hamiltonian in order to investigate ...
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