title: A comparison of the effects of symmetry and magnetoanisotropy on paramagnetic relaxation in related dysprosium single ion magnets.
abstract: Dysprosium complexes of the tmtaa(2-) ligand were synthesized and characterized by X-band EPR and magnetism studies. Both complexes demonstrate magnetoanisotropy and slow paramagnetic relaxation. Comparison of these compounds with the seminal phthalocyanine complex [Dy(Pc)(2)](-) shows the azaannulide complexes are more susceptible to relaxation through non-thermal pathways.
authors.affiliation: P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Ursula J
authors.initials: UJ
authors.lastname: Williams
authors.forename: Brian D
authors.initials: BD
authors.lastname: Mahoney
authors.forename: Patrick T
authors.initials: PT
authors.lastname: DeGregorio
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Carroll
authors.forename: Eiko
authors.initials: E
authors.lastname: Nakamaru-Ogiso
authors.forename: James M
authors.initials: JM
authors.lastname: Kikkawa
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Schelter
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D004419:Dysprosium / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D007211:Indoles / Q000737:chemistry*; D007477:Ions / Q000138:chemical synthesis / Q000737:chemistry; D054833:Isoindoles; D059346:Magnets / Q000737:chemistry*; D008958:Models, Molecular
chemical_list: D056831:Coordination Complexes; D007211:Indoles; D007477:Ions; D054833:Isoindoles; D004419:Dysprosium; C013647:phthalocyanine