title: Calix[4]arene-supported mononuclear lanthanide single-molecule magnet.
abstract: Three new single paramagnetic lanthanide-based complexes, [Ln(L)(LOEt)] (Ln(3+) = Dy(3+), Tb(3+), and Ho(3+)), are synthesized with the multidentate calix[4]arene ligand H2L (H2L = 5,11,17,23-tetrakis(1,1-dimethylethyl)-25,27-dihydroxy-26,28-dimethoxycalix[4]arene) and Kläui's tripodal ligand LOEt(-) (LOEt(-) = (η(5)-cyclopentadienyl)tris(diethylphosphito-p)cobaltate(III)). All of the complexes have been characterized by single crystal X-ray diffraction analysis, thermal stability, absorption spectra, and magnetization measurements. The magnetic properties and magnetostructural correlation in this seven-coordinated system are investigated. The dysprosium complex 1 shows typical single-molecule magnetic behavior with characteristic magnetic hysteresis loops and the slow relaxation of magnetization.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University , Hankou Road 9, Nanjing 210093, P. R. China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Long
authors.initials: L
authors.lastname: Cui
authors.forename: You
authors.initials: Y
authors.lastname: Song
authors.forename: Yi-Zhi
authors.initials: YZ
authors.lastname: Li
authors.forename: Jing-Lin
authors.initials: JL
authors.lastname: Zuo