Slow magnetic relaxation in lanthanide complexes with chelating nitronyl nitroxide radical.
Two rare-earth radical complexes [Ln(hfac)(3)NIT-2Py].0.5C(7)H(16) [Ln = Tb (1), Dy (2)] have been synthesized and characterized structurally as well as magnetically. Both complexes are isomorphous, in which the NIT-2Py radical is coordinated to the Ln(III) ion in a chelating manner. Magnetic studies reveal that complex 1 shows a frequency-dependent, alternating-current magnetic susceptibility typical of a single-molecule magnet, whereas slow magnetic relaxation is observed in 2 under an applied direct-current field.
Wang
Xiao-Ling
XL
Department of Chemistry, Nankai University, Tianjin 300071, China.
Li
Li-Cun
LC
Liao
Dai-Zheng
DZ
D002614:Chelating Agents / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005609:Free Radicals / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D008280:Magnetics; D008958:Models, Molecular; D015394:Molecular Structure; D009589:Nitrogen Oxides / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry
D002614:Chelating Agents; D005609:Free Radicals; D028581:Lanthanoid Series Elements; D008024:Ligands; D009589:Nitrogen Oxides; D009942:Organometallic Compounds; D011725:Pyridines