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Structural Diversity of Infinite 3d–4f Heterometallic Cluster Compounds Driven by Various Lanthanide Radii
Author(s) -
Xiang Shengchang,
Hu Shengmin,
Sheng Tianlu,
Chen Jianshan,
Wu Xintao
Publication year - 2009
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200900520
Subject(s) - antiferromagnetism , lanthanide , crystallography , cluster (spacecraft) , cationic polymerization , type (biology) , topology (electrical circuits) , chemistry , ion , magnetization , materials science , stereochemistry , condensed matter physics , physics , magnetic field , mathematics , combinatorics , computer science , ecology , organic chemistry , quantum mechanics , biology , programming language
The syntheses, structures, and characterization of six Ln 3+ –Cu 2+ –glycine (Hgly) coordination polymers are described in this paper. They represent three types of structures. Type I (Ln=La ( 1 ), Pr ( 2 ), and Sm ( 3 )) is a 1D catenarian polymer comprising [Ln 2 ] nodes bridged by four cis ‐Cu(gly) 2 linkers. Type II (Ln=Eu ( 4 ) and Dy ( 5 )) is a 2D open framework with a 4 4 ‐net, composed of novel [Ln 6 Cu 22 ] cluster nodes linked by trans ‐Cu(gly) 2 linkers. Furthermore, the inner structures of the [Ln 6 Cu 22 ] nodes, and the connection mode between the nodes and linkers are slightly different for 4 and 5 . Type III (Ln=Er ( 6 )) is a 3D open framework with a novel 3 6 ⋅4 18 ⋅5 3 ⋅6 topology, made up of [Er 6 Cu 24 ] cluster nodes and trans ‐Cu(gly) 2 linkers. The rich variety of the resulting structures owes itself mainly to the interselection between the dynamic control of metalloligands and cationic components. A transition from frequency dependence to frequency independence is observed in the field‐induced magnetization lag for 1 – 3 . The frequency dependence at low temperatures may come from the antiferromagnetic CuCu interaction through the [Ln 2 ] nodes, whereas the frequency independence may be due to the disappearance of the antiferromagnetic CuCu interaction at high temperatures.