Several complexes of lanthanide(III) thiocyanates, nitrates, perchlorates and trifluoromethanesulphonates with pyridine 1-oxide (pyO) 2,2′-bipyridine1,1′-dioxide (bipyO2) and 2,2′,2″-terpyridine 1,1′, 1″-trioxide (terpyO3) have been prepared and characterized. The complexes achieve preferentially the eight-coordination; nine- and ten-coordination have been also observed. Complexation of lanthanide(II)
Cis–trans isomerism modulates the magnetic relaxation of dysprosium single-molecule magnets
作者:Jianfeng Wu、Julie Jung、Peng Zhang、Haixia Zhang、Jinkui Tang、Boris Le Guennic
DOI:10.1039/c5sc04510j
日期:——
Geometry and magnetic relaxation modulations in a series of mononuclear dysprosium complexes, [DyLz2(o-vanilin)2]·X·solvent (Lz = 6-pyridin-2-yl-[1,3,5]triazine-2,4-diamine; X = Br− (1), NO3− (2), CF3SO3− (3)), were realized by changing the nature of the counter-anion. The DyIII ions in all complexes are eight-coordinate and in approximate D4d symmetry environments. The magnetic relaxation and anisotropy
Axial Ligand Field in <i>D</i><sub>4<i>d</i></sub> Coordination Symmetry: Magnetic Relaxation of Dy SMMs Perturbed by Counteranions
作者:Jianfeng Wu、Olivier Cador、Xiao-Lei Li、Lang Zhao、Boris Le Guennic、Jinkui Tang
DOI:10.1021/acs.inorgchem.7b01582
日期:2017.9.18
axial ligand field with short Dy–Osali distances and large ∠Osali–Dy–Osali angles, while the quantum tunneling relaxation is probably dictated by the π–π stacking of the Lz ligands, which induces an axial constriction of the coordinating plane. Ab initio calculations substantiate the diversity of the magnetic behaviors in these complexes and highlight the importance of axial ligand field with short Dy–Osali
Constructing supramolecular grids: from 4f square to 3d–4f grid
作者:Jianfeng Wu、Lang Zhao、Mei Guo、Jinkui Tang
DOI:10.1039/c5cc06960b
日期:——
Novel supramolecular 4f and 3d–4f grids were constructed using dihydrazone based ligands, where the 3d–4f grid represents the first example of this type and shows SMM behavior.
Counteranion Modulated Crystal Growth and Function of One-Dimensional Homochiral Coordination Polymers: Morphology, Structures, and Magnetic Properties
enantiomeric dysprosium(III) phosphonates, namely, R- or S-[Dy3(pempH2)2(pempH)7]2(NO3)4·12H2O (R-1 or S-1), R- or S-[Dy3(pempH)7(pempH2)2]Cl2·2H2O (R-2 or S-2), R- or S-[Dy3(pempH)7(pempH2)2]Br2·2H2O (R-3 or S-3), and R- or S-[Dy11(pempH2)6(pempH)27](CF3SO3)6·22H2O (R-4 or S-4) are reported, where R- or S-pempH2 represent R- or S-(1-phenylethyl)amino] methylphosphonic acid. All show homochiral chain structures