title: Thiacalix[4]arene-supported planar Ln(4) (Ln = Tb(III), Dy(III)) clusters: toward luminescent and magnetic bifunctional materials.
abstract: This paper reports the syntheses, crystal structures, and luminescent and magnetic properties of four tetranuclear Tb(III) (1 and 3) and Dy(III) (2 and 4) complexes supported by p-phenylthiacalix[4]arene (H(4)PTC4A) and p-tert-butylthiacalix[4]arene (H(4)TC4A). All four frameworks can be formulated as [Ln(III)(4)(PTC4A/TC4A)(2)(mu(4)-OH)Cl(3)(CH(3)OH)(2)(H(2)O)(3)], and some methanol and water solvent molecules are occupied in the interstices. The compounds are featured with a sandwichlike unit constructed by two tail-to-tail calixarene molecules and a planar tetragonal (mu(4)-OH)Ln(4) cluster. The photoluminescent analyses suggest that there is an efficient ligand-to-Ln(III) energy transfer for compounds 1-3 and H(4)PTC4A is a more efficient "antenna" than H(4)TC4A. The Dy(III) compounds exhibit slow magnetic relaxation behavior of single-molecule magnet nature. The substitution of the t-Bu group with a phenyl group at the up-rim of thiacalix[4]arene leads to different extended structures and physical properties of as-synthesized compounds.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Bi
authors.forename: Xiu-Teng
authors.initials: XT
authors.lastname: Wang
authors.forename: Wuping
authors.initials: W
authors.lastname: Liao
authors.forename: Xinwu
authors.initials: X
authors.lastname: Wang
authors.forename: Ruiping
authors.initials: R
authors.lastname: Deng
authors.forename: Hongjie
authors.initials: H
authors.lastname: Zhang
authors.forename: Song
authors.initials: S
authors.lastname: Gao
mesh_terms: D018360:Crystallography, X-Ray; D004419:Dysprosium / Q000737:chemistry*; D049449:Luminescence; D008280:Magnetics; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D013725:Terbium / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D010636:Phenols; D013440:Sulfides; C500450:thiacalix(4)arene; D013725:Terbium; D004419:Dysprosium