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Two Extended 5‐Methyltetrazolate‐Based Magnetic Complexes: Synthesis, Structure, and Magnetic Properties
Author(s) -
Liu Jing,
Dong HuiMing,
Yang EnCui,
Zhao XiaoJun
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300297
Subject(s) - superexchange , antiferromagnetism , crystallography , nip , ribbon , supramolecular chemistry , chemistry , paramagnetism , magnetism , hydrogen bond , condensed matter physics , materials science , crystal structure , molecule , physics , organic chemistry , composite material
Abstract Two 5‐methyl‐tetrazolate (mtz – )‐based paramagnetic metal coordination polymers, {[Cu 2 (H 2 O) 2 (mtz)(μ 3 ‐OH)(nip)] · H 2 O} n ( 1 ) and [Cu(H 2 O)(mtz) 2 ] n ( 2 ), were obtained in the presence and absence of aromatic 5‐nitroisophathalate (nip 2– ) coligand by varying the preparation methods. Structural determinations reveal that 1 is a three‐dimensional (3D) framework with corner‐sharing triangular ribbons infinitely extended by ditopic nip 2– connectors. In contrast, 2 is a coplanar (4,4) layer constructed from square‐pyramidal Cu II ions and μ‐N1,N4‐mtz – linkers, which is further assembled into a 3D supramolecular network by interlayer hydrogen‐bonding interactions. Magnetically, spin‐frustrated antiferromagnetic ordering is observed in the 3D framework of 1 and canted antiferromagnetic behavior with a slight spin‐flop transition is presented in 2 , which are structurally resulting from the locally Δ‐ribbon in 1 and asymmetric magnetic superexchange mediated by the μ‐N1,N4‐mtz – bridge of 2 .