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Lanthanide(III)−Cobalt(II) Heterometallic Coordination Polymers with Radical Adsorption Properties

2007; American Chemical Society; Volume: 46; Issue: 15 Linguagem: Inglês

10.1021/ic7007446

1520-510X

Xiao‐Qing Zhao, Bin Zhao, Yue Ma, Wei Shi, Peng Cheng, Zong‐Hui Jiang, Dai‐Zheng Liao, Shi‐Ping Yan,

Magnetism in coordination complexes

Two new coordination polymers {[Ln(2)(PDA)(6)Co(3)(H(2)O)(6)] x xH(2)O}(n) [Ln = Nd, x = 7 (1); Ln = Gd, x = 3.25 (2); H(2)PDA = pyridine-2,6-dicarboxylic acid] have been prepared under hydrothermal conditions with Ln(NO(3))(3) x 6H(2)O, CoO, and H(2)PDA in a molar ratio of 2:3:6. X-ray crystallographic analyses reveal that they crystallize in the hexagonal group P6/mcc and exhibit a nanotubular 3D framework. The adsorption experiment shows that 1 and 2 can adsorb radicals, which is proven by electron paramagnetic resonance spectra with the characteristic bands of the radicals at g = 2.006 and 2.005, respectively.