title: Field-induced magnetic transitions in metal phosphonates with ladderlike chain structures: (NH3C6H4NH3)M2(hedpH)2.H2O [M = Fe, Co, Mn, Zn; hedp = C(CH3)(OH)(PO3)2].
abstract: This paper reports the syntheses and characterization of four isomorphous compounds (NH(3)C(6)H(4)NH(3))M(2)(hedpH)(2).H(2)O [M = Fe (1), Co (2), Mn (3), Zn (4); hedp = C(CH(3))(OH)(PO(3))(2)]. Each contains two crystallographically different kinds of {M(2)(hedpH)(2)}(n) double chains, where the {M(2)(mu-O)(2)} dimer units are connected by O-P-O bridges. The double chains are connected through extensive hydrogen bonds, hence generating a three-dimensional supramolecular network. The temperature-dependent magnetic susceptibility measurements show dominant antiferromagnetic interactions in compounds 1-3, mediated through the mu-O and/or O-P-O bridges between the metal(II) centers. The magnetization measurements reveal that compounds 1-3 experience field-induced magnetic transitions at low temperatures.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Yin
authors.forename: Song
authors.initials: S
authors.lastname: Gao
authors.forename: Zhe-Ming
authors.initials: ZM
authors.lastname: Wang
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Yan
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Zheng
authors.forename: Xin-Quan
authors.initials: XQ
authors.lastname: Xin