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Original Articles

Synthesis and Characterization of a Novel 1D Ho(III) Framework Containing Infinite Right- and Left-Handed Helical Ho-O-Ho Linkage

, , , , &
Pages 139-143 | Received 14 Aug 2009, Accepted 08 Dec 2009, Published online: 16 Feb 2010
 

Abstract

Under hydrothermal conditions using a flexible ligand 2,2′ -diphenyl dicarboxylate acid (H2L) and Ho2O3, a novel one-dimensional(1D) Ho(III) complex [Ho2L3(H2O)2]n (1) containing 8-coordinated Ho(III) centers (Ho1 and Ho2) can be isolated. L2 − ligands adopt two kinds of bridging coordination modes: symmetry four-coordinated and asymmetry five-coordinate modes. Interestingly, Ho1 and Ho2 are bridged by L2 − ligands forming two kinds of different 1D chains, in which infinite right- and left-handed helical Ho-O-Ho linkage can be observed. TGA, FT-IR and elemental analysis of 1 were also investigated.

This work was supported financially by Tianjin Normal University (5RL055).

Notes

a R = Σ (‖F 0| |F C ‖)/Σ |F 0|.

b wR = [Σ w(| F 0|2 − |F C |2)2w(F 0 2)]1/2.

a Symmetry transformations used to generate equivalent atoms: A -x, y, -z-1/2; B -x, y, -z+1/2.

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