Publications by authors named "Virginie Bereau"
Article Synopsis
- The compound [(L)Dy(CyPO)]·[BPh] (1-Dy) was synthesized and showed a unique pentagonal bipyramidal structure around the Dy(III) ion when analyzed crystallographically.
- AC magnetic susceptibility measurements indicated that 1-Dy behaves as a single-molecule magnet, evidenced by specific frequency-dependent signals in the absence of a static magnetic field.
- Further analysis revealed that under-barrier magnetic relaxations like Raman and quantum tunneling of magnetization (QTM) significantly influence the energy barrier for magnetization flip (50 K), despite the strong axial character of the Dy(III) ion.
Article Synopsis
- The study explores magnetic anisotropy in pentagonal bipyramidal (PBP) coordination spheres, focusing on both experimental and theoretical aspects.
- It highlights the role of electronic configuration, crystal field effects, structural distortion, and second-coordination spheres in affecting the magnetic properties of transition metal and lanthanide ions.
- Special attention is given to lanthanide derivatives with slow relaxation of magnetization, pointing out how to achieve strong axial anisotropy and the potential use of PBP complexes in creating compounds with tailored magnetic properties.
Article Synopsis
- The study presents one-dimensional coordination polymers made with the 4d metallo-ligand [Mo(NCS)] linked to Ni and Co complexes.
- These polymers include anionic and neutral types, showcasing unique properties like hetero-trimetallic and mixed valence compounds involving different magnetic behaviors.
- The research highlights the significance of the S atom in influencing spin states and magnetic interactions, with findings supported by crystal structure analysis and density functional theory calculations.
Supramolecular control over recognition and efficient detection of picric acid.
Chem Commun (Camb)
October 2014
Bimetallic Schiff-base Al(3+) complexes bearing ester functions at the periphery of the ligands are shown to be efficient fluorescent chemosensors for picric acid detection. The prominent role of an association between the chemosensor and the picric acid in the detection process is demonstrated. The detection of picric acid in water is achieved with the sensor deposited on paper.
View Article and Find Full Text PDF2-D NCS-bridged {3d-4d} molecule-based magnets, formed by reaction of [Mo(III)(NCS)(6)](3-) with either Ni(II) or Co(II) complexes, have been found to exhibit magnetic ordering with T(C) = 39 K for {Co(3)Mo(2)} while {Ni(3)Mo(2)} has a non-magnetic ground state as a result of exact compensation by the individual sub-lattices.
View Article and Find Full Text PDFA series of [AlL(H(2)O)(2)(NO(3))] complexes, with L standing for an ester substituted salophen-type ligand, has been synthesized, and the luminescence properties have been investigated. These derivatives differ by the nature of the ester-R group introduced at the C5 position of their salicylidene rings (i.e.
View Article and Find Full Text PDFA series of Al(III) complexes of a salophen (N,N'-bis(salicylidene)-o-phenylenediamine) derivative with an ester substituent at the C5 position of the salicylidene rings have been prepared and their luminescence properties investigated. All exhibit a bright blue emission (lambda(em) = 478 nm) that is observed neither for other metal ions nor with the non-functionalized ligand. Moreover, the ester-R group (Me, (t)Bu, Ph) was found to significantly affect the quantum yields (varphi = 12 to 20%) of the luminophor.
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