title: Lanthanide-organic coordination frameworks showing new 5-connected network topology and 3D ordered array of single-molecular magnet behavior in the Dy case.
abstract: Five isostructural lanthanide-organic coordination frameworks with a unique 3-D 5-connected (4(7).6(3))(4(3).6(5).8(2)) network, namely, [Ln(phen)(L)]n (Ln = Dy for 1, Gd for 2, Ho for 3, Er for 4, and Tb for 5), have been prepared based on bridging 5-hydroxyisophthalic acid (H3L) and chelating 1,10-phenanthroline (phen) coligand. Significantly, the Dy(III) complex 1 is an organized array of single-molecular magnets (SMMs), with frequency-dependent out-of-phase ac susceptibility signals and magnetization hysteresis at 4 K. Further analysis of the magnetic results can reveal that the SMM behavior of 1 should arise from the smaller ferromagnetic interaction between the Dy(III) ions. Complex 1 was also characterized by X-ray absorption spectra, which give the clear X-ray magnetic circular dichroism signal.
authors.affiliation: Henan Provincial Key Lab of Surface & Interface Science, Zhengzhou University of Light Industry , Zhengzhou 450002, Henan People's Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.forename: E Carolina
authors.initials: EC
authors.lastname: Sañudo
authors.forename: Erika
authors.initials: E
authors.lastname: Jiménez
authors.forename: Shao-Ming
authors.initials: SM
authors.lastname: Fang
authors.forename: Chun-Sen
authors.initials: CS
authors.lastname: Liu
authors.forename: Miao
authors.initials: M
authors.lastname: Du