title: Syntheses, structures, and magnetic properties of seven-coordinate lanthanide porphyrinate or phthalocyaninate complexes with Kläui's tripodal ligand.
abstract: A series of seven-coordinate mononuclear lanthanide(III) complexes of the general formula [(TPP)Ln(L(OEt))]·0.25H2O and [(Pc)Ln(L(OEt))] (Ln(3+) = Dy(3+), Tb(3+), Ho(3+), and Gd(3+); TPP = 5,10,15,20-tetraphenylporphyrinate; Pc = phthalocyaninate; L(OEt)(-) = [(η(5)-C5H5)Co(P(=O)(OEt)2)3](-)) are synthesized on the basis of the tripodal ligand L(OEt)(-) and either porphyrin or phthalocyanine ligands. All of the complexes are characterized by X-ray crystallography and by static and dynamic magnetic measurements. The Dy and Tb complexes show the field-induced slow relaxation of magnetization, and they are interesting seven-coordinate single-lanthanide-based SMMs. The magnetic relaxation properties of these double-decker sandwich complexes are influenced by the local molecular symmetry and are sensitive to subtle distortions of the coordination geometry of the paramagnetic lanthanide ions, such as metal-to-plane distances, plane center distances, and bending angles.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Min-Xia
authors.initials: MX
authors.lastname: Yao
authors.forename: Yu-Yang
authors.initials: YY
authors.lastname: Li
authors.forename: Yi-Zhi
authors.initials: YZ
authors.lastname: Li
authors.forename: You
authors.initials: Y
authors.lastname: Song
authors.forename: Jing-Lin
authors.initials: JL
authors.lastname: Zuo
mesh_terms: D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D060526:Magnetic Fields; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*
chemical_list: D007211:Indoles; D054833:Isoindoles; D028581:Lanthanoid Series Elements; D008024:Ligands; D009942:Organometallic Compounds; D011166:Porphyrins; C013647:phthalocyanine