Publications by authors named "Y Journaux"

Article Synopsis
  • Maghemite nanoparticles modified with Co(II) coordination complexes show enhanced magnetic properties, including doubled blocking temperature and increased coercive field, due to changes in magnetic anisotropy.
  • Magnetometric studies indicate that this enhancement stems from molecular interactions between Co(II) and oxygen atoms at the nanoparticle surface, affecting both surface and core magnetic characteristics.
  • X-ray spectroscopy techniques confirm strong magnetic exchange interactions at room temperature, with similar effects observed in Ni(II) modified nanoparticles, highlighting the role of oxido coordination bridges in magnetic coupling.
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We report the unique heterobimetallic dodecanuclear oxamate-based {CoII6CuII6} nanowheel obtained using an environmentally friendly synthetic protocol. The effective Hamiltonian methodology employed herein allows the rationalisation of magnetic isotropic or anisotropic metal clusters, being a significant advance for future studies of exciting properties only observed at low and ultralow temperatures.

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The use of solvothermal conditions has succesfully led to the preparation of heterometallic 1D coordination polymers from a co-bidentate-tridentate phenolato-oxamato ligand. The reaction of the N-(2-hydoxyphenyl)oxamic acid (ohpma) with acetate salts of transition metal ions at 80 °C has yielded the heterobimetallic [Cu(ohpma)M(OAc)(DMF)2] (M = Co (1); Mn (2)) and the heterotrimetallic [Cu(ohpma)Co0.57Mn0.

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We report a new cyanide-bridged Cs⊂{FeCo} box, a soluble model of photomagnetic Prussian blue analogues (PBAs). The Cs ion has a high affinity for the box and can replace the K ion in the preformed K-cube. This exchange is kinetically impeded at room temperature but is accelerated by heating and using the 18-crown-6 ether.

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Being able to easily determine the Cu(II) affinity for biomolecules of moderate affinity is important. Such biomolecules include amyloidogenic peptides, such as the well-known amyloid-β peptide involved in Alzheimer's disease. Here, we report the synthesis of a new water-soluble ratiometric Cu(II) dye with a moderate affinity (10 M at pH 7.

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